CN1316277C - Camera apparatus - Google Patents

Abstract

The present invention provides an imaging device capable of blocking light leakage entering an imaging element from a joint surface of a holder and a lens frame. The imaging device of the present invention has: a lens frame and an imaging element holder, the lens frame and the imaging element holder are joined to each other, and it is characterized in that: on the lens frame joint portion of the lens frame joined to the imaging element holder, Along the peripheral portion of the lens frame, a convex portion protruding toward the imaging element holder side in a direction parallel to the optical axis of the above-mentioned imaging lens is formed; On the portion, along the peripheral portion of the imaging element holder, a groove in which the above-mentioned convex portion is embedded is formed, and the groove is recessed in a direction parallel to the optical axis of the above-mentioned imaging lens; the above-mentioned lens frame and the imaging element holder The above-mentioned protrusions and the above-mentioned grooves are bonded by a bonding layer formed of an adhesive.

Description

camera device

technical field

The invention relates to an imaging device for photographing an object.

Background technique

As shown in FIG. 7 , an existing imaging device 100 used in a camera (Camera) etc. has: an imaging lens 30 composed of two lenses 30a, 30b installed in a lens frame 20; an optical filter (optical filter) 40 ; and a light receiving unit 50 provided behind the optical filter 40 .

The optical filter 40 is an optical filter such as a crystal optical filter, an infrared cut filter, etc. matched with the characteristics of the CCD (charge-coupled device) imaging element 50a. Planar components. In addition, this filter 40 is inserted into a filter mounting portion 20 a provided at the rear of the lens frame 20 .

The light receiving unit 50 is composed of a CCD imaging element 50a, an outer package (package) 50b that holds the CCD imaging element 50a, and a sealing glass (glass) 50c that seals the CCD imaging element 50a in the outer package 50b at the front, and is opposed to each other by an adhesive. A holder 60 is fixed. In addition, this holder 60 is attached to the rear end portion of the lens frame 20, and is fixed by a bolt 60a. In addition, JP-A-11-345955 discloses that the lens unit and the imaging element are fixed with an adhesive instead of bolts, and the thickness of the adhesive is used to overcome dimensional variation.

However, in the existing imaging device, the holder on which the light receiving unit is fixed is fixed to the rear end of the lens frame with bolts. Therefore, when the bolts are not sufficiently tightened, or when the lens frame and the holder cannot be tightly bonded, There is a possibility that light that leaks from the joint between the holder and the lens frame enters the CCD imaging element. In addition, although it is conceivable to use an adhesive instead of bolts to join the lens frame and the holder, at this time, the light leaked from the adhesive layer formed by the adhesive may also enter the CCD imaging element.

Contents of the invention

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to block light leaking into an imaging element from a junction between a holder and a lens frame.

In order to solve the above problems, the imaging device of the present invention has: a lens frame, which is equipped with an imaging lens inside; The imaging element; the above-mentioned lens frame and the imaging element holder are mutually engaged, and it is characterized in that:

On the lens frame joint portion of the lens frame bonded to the imaging element holder, along the peripheral portion of the lens frame, there is formed a hole protruding toward the imaging element holder side in a direction parallel to the optical axis of the imaging lens. Convex;

On the holder joint portion of the imaging element holder joined to the lens frame, along the peripheral portion of the imaging element holder, a groove in which the above-mentioned protrusion is fitted is formed, and the groove is aligned with the light of the imaging lens. Concave in the direction parallel to the axis;

The lens frame and the protrusions and grooves of the imaging element holder are bonded by a bonding layer formed of an adhesive.

According to the present invention, the lens frame and the image pickup element holder are bonded so that the first convex portion and the second convex portion overlap in a direction intersecting with the directions of these projections, so that the overlapping portion of the first convex portion and the second convex portion can be passed through. The light leaking in from the outside is blocked, so the light leaking into the imaging element from the gap between the holder joint part and the lens frame joint part can be blocked.

Preferably, the imaging device of the present invention is characterized in that:

The above-mentioned convex part is that the first rib and the second rib are formed along the peripheral part of the lens frame in parallel and at intervals;

As for the grooves, the first grooves and the second grooves are formed in parallel and spaced along the peripheral portion of the imaging element holder.

Preferably, the imaging device of the present invention is characterized in that the adhesive has light-shielding properties.

According to the present invention, since the adhesive has light-shielding properties, the light-shielding properties of the bonding layer can be improved, and the ability to block light leakage from the lens frame joint portion and the holder joint portion can be improved.

Description of drawings

Fig. 1 is an example of the first embodiment of the present invention, (a) is a plan view of an imaging device, and (b) is a cross-sectional view along line A-A in Fig. 1(a).

Fig. 2 is an example of a second embodiment of the present invention, (a) is a plan view of an imaging device, and (b) is a sectional view taken along line A-A in Fig. 2(a).

3 is an example of a third embodiment of the present invention, and is a cross-sectional view showing the outline of an imaging device.

FIG. 4 is an example of a fourth embodiment of the present invention, and is a cross-sectional view showing the outline of an imaging device.

5 is an example of a fifth embodiment of the present invention, and is a cross-sectional view showing the outline of an imaging device.

Fig. 6 is a plan view showing main parts of a CCD outer package.

Fig. 7 is a cross-sectional view of a conventional imaging device.

Detailed ways

Hereinafter, specific embodiments of the imaging device according to the present invention will be described with reference to the drawings. However, the illustrated examples do not limit the scope of the invention.

(first embodiment)

As shown in Figure 1, the imaging device 1 of the first embodiment is an imaging device using a pan-focus camera (pan-focus camera) or the like, and has: a lens frame 2, an imaging lens 3 for photographing an object is arranged inside it; a CCD Outer package (picture element holder) 5, the CCD photoelectric sensor (image pickup element) 4 that photoelectric conversion is carried out to the subject image that is taken by camera lens 3 is installed in its inside; And lens frame 2 and CCD outer package 5 are joined mutually . In addition, in the following description, the subject side of the camera at the time of shooting, that is, the upper side in FIG.

The lens frame 2 has a substantially rectangular cylindrical shape and has a hollow portion 11 communicating in the optical axis direction, that is, the vertical direction in FIG. 1( b ). The hollow portion 11 has: a first hollow portion 11a, which is surrounded by a substantially cylindrical first inner wall 2b; a second hollow portion 11b, which is installed behind the first hollow portion 11a, and has a diameter of more towards the rear. It is surrounded by a second inner wall 2c having a larger conical shape. Also, the first imaging lens 3a is attached to the first inner wall 2b forming the first hollow portion 11a, and the second imaging lens 3b is attached near the center of the second inner wall 2c forming the second hollow portion 11b. And, by these first imaging lens 3a and second imaging lens 3b, the imaging lens 3 has the function of a single focus lens.

In addition, on the outside of the lens frame 2 rear end, along the periphery of the lens frame 2, a flange (flange) portion 6 protruding outward horizontally is formed, and this flange portion 6 forms the lens frame 2 that is joined on the CCD outer package 5 The lens frame joint part 6. In addition, a first convex portion 6a protruding toward the CCD outer package 5 side is formed extending from the peripheral portion 2a of the lens frame 2 substantially at the center of the end surface 6c of the flange portion 6 .

The CCD outer package 5 is a rectangular plate-like object that is slightly larger than the profile of the lens frame 2 including the flange portion 6, and has a lower height than the lens frame 2 in width and inward length. At the central position of the front end face 7c, a A depression 12 whose diameter decreases stepwise toward the rear. The recess 12 is formed by four stepped steps from the front end surface 7 c of the CCD outer package 5 .

Furthermore, a CCD photosensor (imaging element) 4 is mounted on the fourth step portion 14b from the front where the recess 12 is formed. In addition, on the front of the CCD photoelectric sensor 4, that is, on the second step portion 12b counted from the front where the recess 12 is formed, an OLPF (Optical Glass) functioning as a cover glass (cover glass) of the CCD photoelectric sensor 4 is installed. Low Pass Fillter optical low pass filter) 15.

The OLPF 15 is a parallel plane member whose incident surface and outgoing surface are perpendicular to the optical axis. Then, the OLPF 15 is fixed to the stepped portion 12b and the CCD photoelectric sensor 4 is fixed to the stepped portion 14b with an adhesive or the like.

In addition, the second convex portion 7a protrudes toward the lens frame 2 side by the front end surface 7c of the CCD outer package 5 and the first step 7b from the front. The second convex portion 7 a is formed extending from the peripheral portion 5 a of the CCD package 5 , and is a package joint portion (holder joint portion) 7 of the CCD package 5 joined to the lens frame 2 . Here, the front end surface 7c of the CCD outer package 5 is provided in front of the front end surface of the OLPF 15 .

In addition, the lens frame 2 and the imaging element holder 5 are bonded so that the first convex portion 6a and the second convex portion 7a are approximately Half overlap. In the space surrounded by the side wall 6b outside the first convex portion 6a, the end surface 6c of the flange portion 6, and the front end surface 7c of the CCD outer package 5, there is a bonding layer 9 formed of a light-shielding adhesive 8. , the lens frame 2 and the CCD outer package 5 are bonded through the bonding layer 9 . In addition, the side wall 6b on the outside of the first convex portion 6a and the side wall 7b on the inside of the second convex portion 7a are arranged at a predetermined interval.

Next, a method of joining the lens frame 2 and the CCD outer package 5 according to the first embodiment will be described.

First, the front end surface 7c of the CCD outer package 5 is coated with a light-shielding adhesive 8 . And make the 1st convex portion 6a of lens frame 2 and the 2nd convex portion 7a of CCD outer package 5 approach close, make the first convex portion 6a embed the inboard of the 2nd convex portion 7a, between these 1st convex portion 6a and the 2nd convex portion 7a. 2. In the direction where the protruding directions of the convex portions 7a intersect, approximately half of them overlap. In this way, in the space surrounded by the side wall 6b outside the first convex portion 6a, the end surface 6c of the flange portion 6, and the front end surface 7c of the CCD outer package 5, there is a bonding layer 9 formed by an adhesive 8, and the bonding layer 9 is formed by the adhesive 8. The bonding layer 9 bonds the lens frame 2 and the CCD outer package 5 .

At this time, for adjusting the focus of the CCD photoelectric sensor 4 of the imaging lens 3 before the adhesive 8 is solidified, the distance between the side wall 6b on the outside of the first convex portion 6a and the side wall 7b on the inside of the second convex portion 7a is adjusted, and The distance between the end face 6c of the flange portion 6 and the front end face 7c of the CCD outer package 5.

According to the above-mentioned first embodiment, the lens frame 2 and the imaging element holder 5 are bonded so that the first convex portion 6 a and the second convex portion 7 a intersect with the protruding directions of the first convex portion and the second convex portion. About half of the overlap in the direction of the first convex part 6a and the second convex part 7a can block the light leakage from the outside by the overlapped part of the first convex part 6a and the second convex part 7a, and can block the entry of CCD photoelectric light from between the flange part 6 and the outer package joint part 7. Light leakage from sensor 4.

In addition, the front end surface 7c of the CCD outer package 5 is disposed in front of the front end surface of the OLPF15, so when the lens frame 2 and the CCD outer package 5 are bonded, the front end surface of the OLPF15 can be prevented from contacting the lens frame 2, and the front end surface of the OLPF15 can be protected.

In addition, the bonding layer 9 exists in the space surrounded by the side wall 6b outside the first convex portion 6a, the end face 6c of the flange portion 6, and the front end face 7c of the CCD outer package 5. Therefore, by adjusting the bonding layer 9 The thickness can be adjusted by adjusting the distance between the end surface 6c of the flange portion 6 and the front end surface 7c of the CCD outer package 5 . Therefore, when there is a flatness error in the end surface 6c of the flange part 6 and the front end surface 7c of the CCD outer package 5 due to manufacturing deviations of the lens frame 2 and the CCD outer package 5, or when the thickness of the OLPF 15 varies. Next, by adjusting the above-mentioned distance between the lens frame 2 and the CCD outer package 5, the focus of the CCD photoelectric sensor 4 of the imaging lens 3 can also be adjusted easily.

In addition, since the adhesive 8 sandwiched by the bonding layer 9 has light-shielding properties, the light-shielding properties of the bonding layer 9 can be improved, and the blocking performance of light leakage from between the flange portion 6 and the outer package bonding portion 7 can be improved.

(second embodiment)

Next, the second embodiment will be described.

The imaging device 10 of the second embodiment, as shown in FIG. 2, is an imaging device in which the positions of the first convex portion 6a on the outside and the second convex portion 7a on the inside of the first embodiment are changed from each other. The same as the first embodiment. Therefore, in the imaging device 10, the same constituent elements as those of the imaging device 1 of the first embodiment are assigned the same reference numerals, and description thereof will be omitted.

On the outer edge of the end surface 6c of the flange portion 6, a first convex portion 6a protruding toward the CCD outer package 5 side is formed extending from the peripheral portion 2a of the lens frame 2, as in the first embodiment.

On the edge of the front of the CCD outer package 5, there is provided a stepped portion 5c recessed to the rear, the height of which is approximately equal to the height of the first stepped portion 5b from the front where the recess 12 is formed. And, by CCD outer package 5 front face 7c, the first step 7b that forms recess 12 and the step 7d of CCD outer package 5 edges, form the 2nd protrusion 7a that protrudes toward lens frame 2 side. In addition, like the first embodiment, the second convex portion 7 a is formed extending from the peripheral portion 5 a of the CCD package 5 , and is the package bonding portion 7 of the CCD package 5 joined to the lens frame 2 .

Next, a method of joining the lens frame 2 and the CCD outer package 5 according to the second embodiment will be described.

First, on the step portion 5c of the CCD outer package 5, apply a light-shielding adhesive 8, the same as the first embodiment, make the first convex portion 6a and the second convex portion 7a close to each other, and make the first convex portion 6a fits outside the second convex portion 7a so that the first convex portion 6a and the second convex portion 7a overlap approximately half in the direction intersecting the protruding direction. In this way, in the space surrounded by the front end surface 6e of the first convex portion 6a, the stepped portion 5c outside the second convex portion 7a, and the side wall 7d outside the second convex portion 7a, there is a bond formed by the adhesive 8. Layer 9, through which the lens frame 2 and the CCD outer package 5 are bonded.

At this time, in order to adjust the focus of the CCD photoelectric sensor 4 of the imaging lens 3 before the bonding agent is solidified, the distance between the side wall 6d inside the first convex portion 6a and the side wall 7d outside the second convex portion 7a, and the distance between the second convex portion 7a and the side wall 7d outside the second convex portion 7a are adjusted. The distance between the stepped portion 5c outside the convex portion 7a and the front end surface 6e of the first convex portion 6a.

According to the second embodiment as described above, in addition to the same effects as those of the first embodiment, the lens frame 2 and the imaging element holder 5 are bonded together, and the first convex portion 6a and the second convex portion 7a are connected with these first convex portions. About half of the protrusions and the second protrusions overlap each other in a direction intersecting with each other. Therefore, even if the imaging device in which the first convex portion 6a is on the outside and the second convex portion 7a is on the inner side of the first embodiment has changed positions, the overlapped portion of the first convex portion 6a and the second convex portion 7a can be covered. Leakage of light from the outside can block light leakage entering the CCD photoelectric sensor 4 from between the flange portion 6 and the joint portion 7 of the outer package.

In addition, the bonding layer 9 exists in the space surrounded by the front end surface 6e of the first convex portion 6a, the stepped portion 5c outside the second convex portion 7a, and the side wall 7d outside the second convex portion 7a. Therefore, by adjusting this The thickness of the bonding layer 9 can be adjusted by adjusting the distance between the stepped portion 5c outside the second convex portion 7a and the front end surface 6e of the first convex portion 6a. Therefore, when there is the flatness error of the step portion 5c outside the second convex portion 7a and the front end surface 6e of the first convex portion 6a due to the manufacturing deviation of the lens frame 2 and the CCD outer package 5, etc., the By adjusting the distance between the lens frame 2 and the CCD outer package 5, the focus of the CCD photoelectric sensor 4 of the imaging lens 3 can be easily adjusted.

(third embodiment)

Next, a third embodiment will be described with reference to FIG. 3 .

In the imaging device 21 of the third embodiment, the lens frame 2 and the imaging lens 3 disposed therein, the CCD outer package (imaging element holder) 5, the CCD photosensor (imaging element) 4 disposed therein, and the OLPA 15 etc. are the same as those of the first and second embodiments, therefore, while simplifying their illustrations, the same constituent elements as those of the imaging devices 1 and 10 of the first and second embodiments are given the same reference numerals, and Its description is omitted.

The difference between the third embodiment and the first and second embodiments is the structure of the lens frame joint part 6 and the outer package joint part (holder joint part) 7, so these differences will be described in detail below.

That is, ribs (protrusions) 18 are formed on the end surface 6c of the lens frame joint portion 6 to extend along the periphery of the lens frame 2 . The rib 18 has a rectangular cross section and also serves as the first protrusion 6a in the first and second embodiments.

In addition, on the front end surface 7c of the outer package joint part 7, a groove 19 is formed extending along the periphery of the CCD outer package 5 to fit the above-mentioned rib 18, and the parts on both sides of the groove 19 are also used as the first and second embodiment In the example, the second convex portion 7a.

Furthermore, between the front end surface 6c of the lens frame joint part 6 and the front end surface 7c of the outer package joint part 7, there is a joint layer 9 formed of a light-shielding adhesive, and this joint layer 9 is joined to the rib 18. Two side surfaces and the front end surface, the inner surface and the bottom surface of the groove 19.

For bonding the lens frame 2 and the CCD outer package 5, at first, on the groove 19 of the CCD outer package 5, apply a prescribed amount of adhesive, secondly, make the lens frame 2 fit by making the rib 18 embed in the groove 19. The CCD outer package 5 is inserted so that the rib 18 (first convex portion 6a) and the second convex portions 7a, 7a overlap each other in a direction intersecting with their protruding directions. At this time, the ribs 18 compress the adhesive in the groove 19, so the compressed adhesive spreads to the groove 19 and its surroundings, and the end surface 6c of the lens frame joint part and the outer package joint part 7 Between the front end faces 7c, there is a bonding layer 9 formed of an adhesive, and the bonding layer 9 is bonded to the end face 6c of the lens frame bonding portion 6, the front end face 7c of the outer package bonding portion 7, both sides of the rib 18 and The front end surface, the inner surface and the bottom surface of the groove 19. In this way, the lens frame 2 and the CCD outer package 5 are bonded via the bonding layer 9 .

And, in order to adjust the focus of the CCD photoelectric sensor 4 of the imaging lens 3 before the adhesive is cured, the distance between the side surface of the rib 18 (the first convex portion 6a) and the inner surface of the groove 19, and the lens frame joint portion are adjusted. The distance between the end face 6c of 6 and the front end face 7c of CCD outer package 5.

According to the third embodiment, the lens frame 2 and the CCD holder 5 are bonded so that the rib 18 (the first convex portion 6a) and the second convex portions 7a, 7a overlap in a direction intersecting with their protruding directions. Therefore, The overlapping portion of the first convex portion 6a and the second convex portion 7a, 7a can block the light leakage entering from the outside, and can block the light leakage entering the CCD photosensor 4 from between the lens frame joint portion 6 and the outer package joint portion 7 .

In addition, by adjusting the thickness of the bonding layer 9, the distance between the lens frame 2 and the CCD outer package 5 can be adjusted, so the focus of the CCD photoelectric sensor 4 of the imaging lens 3 can be easily adjusted.

Furthermore, the bonding layer 9 that exists between the lens frame bonding portion 6 and the outer package bonding portion 7 is bonded to the ribs 18 and the grooves 19. Therefore, as the bonding area of this part increases, the lens frame bonding can be improved. The effect of the joint strength of the part 6 and the outer package joint part 7.

(fourth embodiment)

Next, a fourth embodiment will be described with reference to FIG. 4 .

The difference between the imaging device 22 of the fourth embodiment and the imaging device 21 of the third embodiment is the structure of the lens frame joint part 6 and the outer package joint part (holder joint part) 7, so these differences will be described below. In addition, the same reference numerals are assigned to the same constituent elements as those of the third embodiment, and description thereof will be omitted.

Two ribs (protrusions) 18 , 18 extending along the periphery of the lens frame 2 are formed on the end surface 6 c of the lens frame joint portion, and are formed parallel to each other at intervals. The cross section of the rib 18 is rectangular, and also serves as the first protrusion 6a in the first and second embodiments.

And, on the front end surface of the outer package joint part 7, extend along the peripheral direction of the CCD outer package 5 and form two grooves 19, 19 embedded in the above-mentioned ribs 18, 18, and form at intervals in parallel, the grooves 19, The portion between 19 and one portion of the groove 19 also serve as the second protrusion 7a in the first and second embodiments, respectively.

Furthermore, between the end surface 6c of the lens frame joint portion 6 and the front end surface 7c of the outer package joint portion 7, there is a joint layer 9 formed of a light-shielding adhesive, and the joint layer 9 and the ribs 18, 18 are formed. The two side surfaces and the front end surface, the inner surface and the bottom surface of the groove 19, 19 are joined.

Lens frame 2 and CCD outer package 5 are joined, and the same as the 3rd embodiment, on two grooves 19,19 of CCD outer package 5, smear prescribed amount of adhesive, next, make this rib 18, 18 is embedded in the grooves 19, 19, so that the lens frame 2 is mounted on the CCD outer package.

According to the fourth embodiment, in addition to obtaining the same effect as the third embodiment, the bonding layer 9 existing between the lens frame bonding portion 6 and the outer package bonding portion 7 has two ribs 18 and two grooves. 19 bonding, so the bonding area is increased compared with the third embodiment, so the bonding strength between the lens frame bonding portion 6 and the outer package bonding portion 7 will be further improved.

Furthermore, in the third embodiment, two ribs 18 and two grooves 19 are formed respectively, but three or more may be formed.

In addition, in the third and fourth embodiments, the rib 18 is formed on the lens frame joint part 6 and the groove 19 is formed on the outer package joint part 7, but on the contrary, ribs may also be formed on the outer package joint part 7. part 18 , a groove 19 is formed on the lens frame joint part 6 .

Furthermore, it is also possible to use the end surface 6c of the flange portion 6 in the first embodiment, the front end surface 7c of the CCD outer package 5, and the front end surface 6e of the first convex portion 6a and the second convex portion 7a in the second embodiment. The ribs 18 and grooves 19 in the third and fourth embodiments described above are formed and joined to the outer stepped portion 5c. The leakage light entering the CCD photoelectric sensor 4 is better shielded, and the bonding strength is improved.

(fifth embodiment)

Next, a fifth embodiment will be described with reference to FIGS. 5 and 6 .

The imaging device 23 of the fifth embodiment differs from the imaging device 21 of the third embodiment in the configurations of the lens frame joint 6 and the outer package joint (holder joint) 7, and these differences will be described below. In addition, the same reference numerals are assigned to the same constituent elements as those of the third embodiment, and description thereof will be omitted.

First, on the lens frame joint portion 6 , a first convex portion 6 a protruding toward the CCD outer package 5 side is formed extending along the edge of the lens frame 2 . A plurality of rectangular plate-shaped ribs (protrusions) 24 protruding in a direction perpendicular to the optical axis O of the imaging lens 3 are formed at predetermined intervals on the outer peripheral surface of the first protrusion 6a.

In addition, a second convex portion 7 a protruding toward the lens frame 2 side is formed on the outer package joint portion 7 extending along the peripheral direction of the CCD outer package 5 . Grooves 25 into which the ribs (protrusions) 24 are fitted are formed at predetermined intervals on the inner peripheral surface of the second convex portion 7a. The groove 25 is formed to be concave inwardly in a rectangular shape in a direction perpendicular to the optical axis.

Then, the first convex portion 6a and the second convex portion 7a overlap each other in a direction intersecting with their protruding directions, and the lens frame 2 and the CCD outer package 5 are bonded together. Between the end surface 6c of the first convex portion 6a and the front end surface 7c of the outer package bonding portion 7, there is a bonding layer 9 formed of a light-shielding adhesive, and the bonding layer 9 extends outward so that the ribs 24 The two side surfaces and the front end surface, the inner surface and the bottom surface of the groove 25 are joined.

When bonding the lens frame 2 and the CCD outer package 5, at first, on the groove 25 and the front end surface 7c of the CCD outer package 5, a predetermined amount of adhesive is coated, and secondly, by inserting the first convex portion 6a into the second convex part 7a and the rib 24 is inserted into the groove 25, the lens frame 2 is installed on the CCD outer package 5, and the first convex part 6a and the second convex part 7a, 7a are in the direction intersecting with their protruding direction Overlap. At this time, the end surface 6c of the first convex portion 6a compresses the adhesive on the front end surface 7c of the outer package joint portion 7, and the rib 24 compresses the adhesive in the groove 25, so the compressed adhesive Diffusion to the front end face 7c of the outer package joint part 7 and the groove 19 and their surroundings, between the end face 6c of the lens frame joint part 6 and the front end face 7c of the outer package joint part 7, there is a bond formed by an adhesive Layer 9, which joins the end surface 6c of the lens frame joint portion 6, the front end surface 7c of the outer package joint portion 7, both side surfaces and the front end surface of the rib 24, and the inner surface and bottom surface of the groove 25. In this way, the lens frame 2 and the CCD outer package 5 are bonded via the bonding layer 9 .

According to the 5th embodiment, make the 1st convex portion 6a and the 2nd convex portion 7a overlap on the direction intersecting with their protruding direction, join lens frame 2 and CCD outer package 5, the 1st convex portion 6a and the 2nd convex portion The overlapping portion of the portion 7a can block the light leakage from the outside, and can block the light leakage entering the CCD photoelectric sensor 4 from between the lens frame joint portion 6 and the outer package joint portion 7 .

In addition, by adjusting the thickness of the bonding layer 9, the distance between the lens frame 2 and the CCD outer package 5 can be adjusted, so the focus of the CCD photoelectric sensor 4 of the imaging lens 3 can be easily adjusted.

Furthermore, the rib 24 protrudes in a direction perpendicular to the optical axis O, and the groove 25 is recessed in a direction intersecting the optical axis of the imaging lens, that is, on the outer peripheral surface of the lens frame joint portion 6 and the outer package joint portion 7 Ribs 24 and grooves 25 are formed on the inner peripheral surface of the lens, and therefore, the bonding area can be further increased, thereby further improving the bonding strength of the lens frame bonding portion 6a and the holder bonding portion 7a.

Furthermore, by fitting the rib 24 into the groove 25, the peripheral direction of the lens frame 2 and the CCD outer package 5 can be easily positioned.

In addition, the contents described in the first to fifth embodiments can be appropriately changed without departing from the gist of the present invention.

For example, in the first and second embodiments, the OLPF fixed on the second step from the front where the CCD outer package is recessed plays the role of the protective glass of the CCD photoelectric sensor, but it can also be changed to Optical glass, so that the OLPF is set on the second inner wall behind the second camera lens. In addition, at this time, the front end surface of the first convex portion is provided behind the rear surface of the OLPF.

The effect of the invention

As described above, according to the present invention, the lens frame and the image pickup element holder are joined by overlapping the first protrusion and the second protrusion in a direction intersecting with their protruding directions, so that the joint part and the imaging element holder from the holder can be blocked. Leakage of light entering the image sensor between the joints of the lens frame.

According to the present invention, in addition to the above effects, since the joint layer exists between the lens frame joint portion and the holder joint portion, the distance between the lens frame and the imaging element holder can be adjusted. In this way, even if the outer shape of the lens frame and the imaging element holder varies during manufacture, it is possible to easily adjust the focus of the imaging element of the imaging lens.

According to the present invention, in addition to obtaining the above effects, since a convex portion is formed on one of the lens frame joint portion and the holder, and a groove for fitting the convex portion is formed on the other side, there is a gap between the lens frame joint portion and the holder joint portion. The joint layer is joined to the convex portion and the groove, so the joint area is increased, thereby improving the joint strength of the lens frame joint portion and the holder joint portion.

According to the present invention, in addition to the above effects, since the protrusions and grooves are formed on the outer peripheral surface and the inner peripheral surface of the lens frame joint portion and the holder joint portion, the joint area can be further increased, thereby improving the lens frame joint portion. The joint strength of the joint with the retainer.

According to the present invention, in addition to the above effects, since the adhesive has light-shielding properties, the light-shielding properties of the joint layer can be improved, and the light-shielding properties of the light leakage entering between the lens frame joint portion and the holder can be improved.

Claims (3)

1. camera head has: the camera lens frame, and it is equipped with pick-up lens in inside; And the imaging apparatus keeper, the imaging apparatus that the image of the subject that photographs by above-mentioned pick-up lens is carried out opto-electronic conversion is equipped with in its inside; Above-mentioned camera lens frame and imaging apparatus keeper are bonded with each other, and it is characterized in that:

On the camera lens frame junction surface that is engaged with the camera lens frame on the above-mentioned imaging apparatus keeper,, form the protuberance of on the direction parallel, giving prominence to imaging apparatus keeper one side with the optical axis of above-mentioned pick-up lens along the periphery of camera lens frame;

On the keeper junction surface that is engaged with the imaging apparatus keeper on the above-mentioned camera lens frame, along the periphery of imaging apparatus keeper, form and embed the groove that raised part is arranged, this groove is recessed in the direction parallel with the optical axis of above-mentioned pick-up lens;

The raised part of above-mentioned camera lens frame and imaging apparatus keeper and above-mentioned groove are engaged by the knitting layer that bonding agent forms.

2. according to the camera head of claim 1, it is characterized in that:

Raised part is that the 1st flank and the 2nd flank form along the periphery and the parallel interval ground of camera lens frame;

Above-mentioned groove is that the 1st groove and the 2nd groove form along the periphery and the parallel interval ground of imaging apparatus keeper.

3. according to each camera head among the claim 1-2, it is characterized in that: above-mentioned bonding agent has light-proofness.

Images