CN210007790U

CN210007790U - Image pickup apparatus

Info

Publication number: CN210007790U
Application number: CN201921469654.3U
Authority: CN
Inventors: 徐业钏
Original assignee: Shenzhen Bo Son Photoelectric Technology Co Ltd
Current assignee: Shenzhen Bo Son Photoelectric Technology Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-01-31
Anticipated expiration: 2029-09-05

Abstract

The utility model provides an camera device, camera device includes the lens unit, the holder is used for keeping the lens unit, the base plate is connected with the sensor, light sees through the lens unit can shine the sensor, the fastener, the holder with the base plate passes through the fastener is connected plays, and the holder with the base plate can slide along the direction relative slip of perpendicular to optical axis, and the elastic component, the elastic component directly or indirectly press to support in the fastener, the fastener will the elastic component is extruded along the optical axis direction, makes the holder with the base plate hug closely at play.

Description

Image pickup apparatus

Technical Field

The utility model relates to an kinds of camera devices with lens units, provide kinds of camera devices that can stably maintain the focus position of lens even the external environment changes such as temperature.

Background

As an imaging device used in an in-vehicle camera, a monitoring camera, or the like, an imaging device mounted with a small-sized and low-cost lens unit of a fixed focus called a pan-focus type is often used.

CN208076805U discloses types of imaging devices that can suppress the problem of lens focus shift when the temperature changes, and it is understood that this patent is mainly concerned with a countermeasure against lens units.

JP2016027360 (see also CN105278212A or US2016028929a1) discloses types of cameras in which the sensor substrate is fixed by adhesion and the strength is insufficient in, for example, vehicle-mounted applications where vibration impact is strong.

SUMMERY OF THE UTILITY MODEL

In view of the above-described problems of the prior art, the present invention aims to provide types of image pickup devices capable of stably maintaining the focal position of a lens even when the temperature changes.

The utility model provides an camera device, camera device includes:

a lens unit;

a holder for holding the lens unit;

the substrate is connected with a sensor, and light can irradiate the sensor through the lens unit;

a fastener by which the holder and the base plate are connected and which are capable of relative sliding movement in a direction perpendicular to the optical axis, and

and the elastic piece is directly or indirectly pressed against the fastening piece, and the fastening piece extrudes the elastic piece along the optical axis direction, so that the holding piece and the substrate are tightly attached to .

Preferably, the retaining member and the base plate are connected at by a plurality of fasteners, at least some of which are directly or indirectly pressed against the resilient member.

Preferably, the holding member is provided with a threaded hole, the base plate is provided with a plurality of through holes, the fastening member is a screw, the screw is screwed into the threaded hole through the through hole so as to connect the holding member and the base plate from , and the diameter of at least part of the through holes is larger than the diameter of the part of the screw, which is positioned in the through hole, so that the holding member and the base plate can relatively slide along the direction perpendicular to the optical axis.

Preferably, the base plate is provided with a plurality of through holes, the through holes include reference positioning holes having an aperture equal to the diameter of the portion of the fastener located in the reference positioning holes or a plurality of adjustment holes having an aperture larger than the diameter of the portion of the fastener located in the adjustment holes.

Preferably, the base plate is provided with a plurality of through holes, the fastener is a stepped screw provided with a stepped portion at least partially embedded in the through holes.

Preferably, the substrate is provided with a plurality of through holes, the through holes include th through holes, second through holes, third through holes and fourth through holes, the th through holes and the fourth through holes are located at diagonal positions, the second through holes and the third through holes are located at diagonal positions, the th through holes, the third through holes and the fourth through holes are round holes, and the second through holes are elongated holes extending along a connecting line direction of the second through holes and the third through holes.

Preferably, the th through hole and the fourth through hole have the same diameter and are larger than the third through hole, the third through hole has a diameter equal to the diameter of the part of the fastener located in the third through hole, and the second through hole has a dimension perpendicular to the extending direction equal to the diameter of the third through hole.

Preferably, the fastening member is a limiting ring, the retaining member is provided with a pin, the pin passes through the through hole of the base plate, and the limiting ring and the elastic member are sleeved on the pin, so that the retaining member and the base plate are connected together at .

Preferably, the elastic member is a spring washer or a rubber washer.

Preferably, the spring washer has elasticity by bending and forms a bending line.

Through the technical scheme, the utility model discloses an even camera device temperature variation also can stably maintain the focus position of lens.

Drawings

Fig. 1 shows a schematic configuration diagram of types of prior art image pickup apparatuses.

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

Fig. 3 shows a schematic configuration diagram of a related-art image pickup apparatus in a low-temperature environment.

Fig. 4 shows a schematic configuration diagram of a related-art image pickup apparatus in a high-temperature environment.

Fig. 5 shows a schematic structural diagram of types of imaging devices according to embodiment of the present invention.

Fig. 6 shows a cross-section along B-B in fig. 5.

Fig. 7 shows a front view of a spring washer of a camera device according to an th embodiment of the present invention.

Fig. 8 shows a bottom view of a spring washer of a camera device according to embodiment of the present invention.

Fig. 9 shows a schematic structural diagram of an image pickup apparatus according to an th embodiment of the present invention in a low-temperature environment.

Fig. 10 shows a cross-section along C-C in fig. 9.

Fig. 11 shows a schematic structural diagram of an image pickup apparatus according to an th embodiment of the present invention in a high-temperature environment.

Fig. 12 shows a cross-section along D-D in fig. 11.

Fig. 13 shows a structural schematic diagram of types of image pickup apparatuses according to the second embodiment of the present invention.

Fig. 14 shows a schematic structural diagram of types of image pickup apparatuses according to a third embodiment of the present invention.

Fig. 15 shows a schematic structural diagram of types of image pickup apparatuses according to a fourth embodiment of the present invention.

Fig. 16 is a schematic structural diagram of a substrate of an image pickup apparatus according to a fourth embodiment of the present invention.

Fig. 17 shows a partially enlarged view of a substrate of an image pickup apparatus according to a fourth embodiment of the present invention.

Fig. 18 is a partial schematic structural diagram of types of image pickup apparatuses according to a fifth embodiment of the present invention.

Fig. 19 shows a partial structure explosion diagram of an image pickup apparatus according to a fifth embodiment of the present invention.

Description of the reference numerals

Step 142 fixing part of pin 141 of screw hole 14 of screw 13 of lens unit 12 of 1 holder 11

2 substrate 21 sensor 22 through hole 22a through hole 22b second through hole 22c third through hole 22d fourth through hole

3 fastener

3a screw

3b step screw

3c retainer ring 31 step

4 bending line of elastic member 41

5 flat washer.

Detailed Description

As shown in fig. 1 and 2, in conventional techniques, a holder 10 to which a lens unit 101 is attached and a base plate 20 to which a sensor 201 is attached are fixed by being screwed with screws 30, and the inventors of the present application have found that there is a problem in fixing the holder 10 to hold the lens unit 101 and the sensor base plate 20, and that, for example, when the temperature change range of the use environment such as an in-vehicle camera is , the focal position of the imaging device may change due to the temperature change.

Referring to fig. 1 to 4, in this prior art, focus adjustment is performed by moving a lens unit 101 in an optical axis direction a with respect to a sensor 201 by a screw 102. The focus position can be stably adjusted without temperature change. Since the holder 10 is made of polycarbonate resin and the substrate 20 is made of epoxy resin, the two materials have different thermal expansion coefficients, and thus the holder 10 and the sensor substrate 20 are warped when the temperature changes greatly.

In the normal temperature state, L1 is the interval between the screw holes of the holder 1, and L2 is the interval between the through holes of the substrate 20.

As shown in fig. 3, since the thermal expansion coefficient of the holder 10 is larger than that of the substrate 20, the holder 10 contracts to a greater extent than the substrate 20 in a low-temperature environment, so that L1< L2, the holder 10 and the sensor substrate 20 may be subjected to warp deformation.

As shown in fig. 4, since the thermal expansion coefficient of the holder 10 is larger than that of the substrate 20, the holder 10 expands to a larger extent than the substrate 20 in a high-temperature environment, so that L1> L2, the holder 10 and the sensor substrate 20 may be subjected to warp deformation. In a low-temperature environment and a high-temperature environment, since the holder 10 and the sensor substrate 20 are warped, the focal position of the lens unit 101 is deviated from the sensor 201, and defocusing occurs. The focal point is shifted to the front side of the sensor in fig. 3 and to the back side of the sensor in fig. 4.

(embodiment )

As shown in fig. 5 to 12, the present invention provides kinds of image pickup apparatuses, which includes a holder 1, a base plate 2, a fastening member 3, and an elastic member 4. the holder 1 is connected with a lens unit 11, the lens unit 11 is connected to the holder 1 by a screw 12, and the lens unit 11 can be moved in an optical axis direction a relative to the holder 1 by rotating the screw 12, thereby performing focus adjustment.

The fastener 3 may be a screw 3a, and the holder 1 is provided with a plurality of (e.g., 4) screw holes 13 for mounting the substrate 2.

The base plate 2 is connected with a sensor 21, the focus of the lens unit 11 falls on the sensor 21, so that an image can be clearly imaged on the sensor, the base plate 2 is provided with a plurality of through holes 22, the positions of the through holes 22 are aligned with the positions of the threaded holes 13, the screws 3a are screwed into the threaded holes 13 after penetrating through the through holes 22, the holder 1 and the base plate 2 are fixedly connected through the screws 3a, the through holes 22 comprise reference positioning holes with hole diameters equal to the hole diameters of the threaded holes 13, the hole diameters of the rest through holes are larger than the hole diameters of the threaded holes 13 and are used as adjusting holes, when the holder 1 and the base plate 2 relatively slide, the reference positioning holes are still aligned with the threaded holes 13, the adjusting holes and the threaded holes 13 can be dislocated, but the threaded holes 13 can be completely positioned in the range defined by the through holes 22, so that the screws 3a still penetrate through the.

The elastic piece 4 is sleeved on the screw 3a, the elastic piece 4 is clamped between the head of the screw 3a and the substrate 2, the elastic piece 4 can absorb or buffer shock after being extruded and deformed, so that the screw 3a is not easy to loosen after being screwed, and the camera device is suitable for a vehicle-mounted use bumping environment, for example.

, as shown in fig. 7 and 8, the elastic member 4 may be a spring washer having a ring shape, which may be elastically bent by punching a steel plate and forms a bending line 41, the bending line 41 may be a straight line passing through a center of the spring washer, the spring washer is bent in a "V" shape as viewed from a side, and a face protruding by bending faces the head of the screw 3 a.

Such a spring washer has a small contact area with the head of the screw 3a and the base plate 2, facilitating the sliding of the spring washer relative to the screw 3a and/or the base plate 2, provided that sufficient pressing force is provided.

The holder 1 and the substrate 2 are made of materials having different thermal expansion coefficients, for example, the holder 1 is made of polycarbonate resin, and the substrate 2 is made of epoxy resin, the thermal expansion coefficient of polycarbonate resin is larger than that of epoxy resin, and the material having a large thermal expansion coefficient is deformed more in high-temperature and low-temperature environments. Since the thermal expansion coefficient of the holder 1 and the thermal expansion coefficient of the substrate 2 are different, the deformation of the holder 1 and the substrate 2 in the low-temperature environment and the high-temperature environment causes the distance between the screw holes 13 and the distance between the through holes 22 to vary to different degrees, thereby causing the holder 1 and the substrate 2 to relatively slide in the direction perpendicular to the optical axis.

It is understood that the holder 1 and the substrate 2 are also deformed in the optical axis direction a in a low-temperature environment and a high-temperature environment, but the amount of deformation in the optical axis direction a is small, so that the imaging of the image pickup apparatus is hardly affected.

As shown in fig. 9 and 10, the photographic apparatus is in a low temperature environment, and the holder 1 contracts to a greater extent than the substrate 2, so that the distance L1 between the centers of the screw holes 13 is smaller than the distance L2 between the centers of the through holes 22. The base plate 2 can be slid in a compressed state, and although the screw hole 13 and the through hole 22 cannot be perfectly aligned, the screw 3a is screwed into the screw hole 13 through the through hole 22 without causing the base plate 2 to be bent and deformed.

As shown in fig. 11 and 12, when the photographic apparatus is in a high temperature environment, the holder 1 expands more than the substrate 2, so that the distance L1 between the centers of the screw holes 13 is greater than the distance L2 between the centers of the through holes 22, and the substrate 2 can slip in a compressed state, and although the screw holes 13 and the through holes 22 are not perfectly aligned, the screws 3a are screwed into the screw holes 13 through the through holes 22 without causing the substrate 2 to bend and deform. In both low temperature environment and high temperature environment, the focus of the lens assembly can accurately fall on the plane of the sensor, so that good focus precision is maintained. In the case where the screw 12 is not rotated, the distance between the lens unit 11 and the sensor 21 is fixed.

(second embodiment)

The entire structure of a photographing device according to a second embodiment of the present invention is the same as that of the photographing device according to the embodiment of the present invention in the present embodiment, the same reference numerals are given to the same or similar components as those of the embodiment, and detailed description thereof is omitted.

As shown in fig. 13, in the second embodiment, the screw 3a of part is sleeved with the elastic member 4, and the screw 3a of part is not sleeved with the elastic member 4. for example, connects the holder 1 and the substrate 2 by four screws 3a in total, two or three of the screws 3a may be sleeved with the elastic member 4, and the other two or screws 3a are not sleeved with the elastic member 4. in particular, since the position of the through hole 22 serving as the reference positioning hole does not move with respect to the holder 1, it is preferable that the elastic member 4 is not sleeved through that through hole 22 serving as the reference positioning hole.

(third embodiment)

The overall structure of the photographing device according to the third embodiment of the present invention is the same as the overall structure of the photographing device according to the second embodiment of the present invention. In the present embodiment, the same or similar components as those of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in fig. 14, the elastic member 4 is a rubber washer, the rubber washer and the flat washer 5 are fitted over the screw 3a, the flat washer 5 is tightly attached to the head of the screw 3a, and the rubber washer is tightly attached to the base plate 2. It is understood that both the rubber washer and the spring washer are capable of being compressed in the optical axis direction a to be elastically deformed when the screw 3a is tightened.

(fourth embodiment)

The entire structure of a photographing device according to a fourth embodiment of the present invention is the same as that of the photographing device according to the embodiment of the present invention in the present embodiment, the same reference numerals are given to the same or similar components as those of the embodiment, and detailed description thereof is omitted.

As shown in fig. 15 to 17, the fastener 3 is a step screw 3b, the step screw 3b is provided with a step 31 between the threaded portion and the head portion, and the step 31 has a radial dimension larger than that of the threaded portion and smaller than that of the head portion. In the axial direction of the step screw 3b, the step 31 is at least partially fitted into the through hole 22.

As shown in fig. 16, the through holes 22 include th through

holes

22a, 22b, 22c and 22d located at four corners of a rectangle, wherein the th through

hole

22a and 22d are located at diagonal positions, and the second through

hole

22b and 22c are located at diagonal positions, the th through

hole

22a, 22c and 22d are circular holes, the second through hole 22b is a long hole, and the second through hole 22b is a long hole extending along a line connecting the second through hole 22b and the third through hole 22 c.

the aperture of the through hole 22a and the fourth through hole 22d is the same and larger than the aperture of the third through hole 22c, the aperture of the third through hole 22c is equal to the diameter of the step 31, the dimension of the second through hole 22b perpendicular to the extending direction is equal to the diameter of the step 31, the third through hole 22c is the reference positioning hole, the the through hole 22a, the second through hole 22b and the fourth through hole 22d are the adjusting holes, the position of the base plate 2 connected to the holder 1 is positioned by the step screw 3b and the second through hole 22b and the third through hole 22c, when the holder 1 and the base plate 2 are deformed due to temperature change, the dislocation of the through hole 22 and the threaded hole 13 caused by the relative sliding of the holder 1 and the base plate 2 is adjusted and compensated by the third through hole 22c as the reference position of the third through hole with larger aperture, the second through hole 22b and the fourth through hole 22 d.

It is to be understood that the -like screw 3a not provided with the step 31 may be applied to this embodiment, and likewise, the step screw 3b mentioned in this embodiment may be applied to other embodiments.

(fifth embodiment)

The entire structure of a photographing device according to a fifth embodiment of the present invention is the same as that of the photographing device according to the embodiment of the present invention in the present embodiment, the same reference numerals are given to the same or similar components as those of the embodiment, and detailed description thereof is omitted.

As shown in fig. 18 and 19, the holder 1 is provided with a pin 14, the pin 14 passes through the through hole 22 of the base plate 2, the fastening member 3 is a limit ring 3c, the limit ring 3c and the elastic member 4 are sleeved on the pin 14, the limit ring 3c is clamped on the pin 14, so that the limit ring 3c cannot move along the axial direction of the pin 14, the holder 1 and the base plate 2 are connected together in a close contact manner at , the elastic member 4 is in close contact with the holder 1, the elastic member 4 can be a spring washer, and the elastic member 4 is pressed by the base plate 2 and the limit ring 3c to be elastically deformed.

The pin 14 is provided with a step portion 141 and a connecting portion 142, the step portion 141 is connected to the retainer 1, the connecting portion 142 is connected to the step portion 141, and the radial dimension of the step portion 141 is larger than the radial dimension of the connecting portion 142. At least part of the step portion 141 is inserted into the through hole 22, and the retainer ring 3c can be engaged with the connecting portion 142. The connecting portion 142 can be sleeved with the limiting ring 3c and then hot-pressed to deform the connecting portion 142 and fix the limiting ring 3c, and the connecting portion 142 can also be provided with a groove for accommodating the limiting ring 3c, so that the limiting ring 3c is clamped in the groove.

Although the above 5 embodiments describe the structure of the present invention in detail, it is also necessary to explain:

(1) the materials of the holder 1 and the substrate 2 are not limited to the polycarbonate resin and the epoxy resin mentioned in the embodiments, and when the thermal expansion coefficients of the materials used for the holder 1 and the substrate 2 are different, the present invention can achieve the advantageous effect of stably maintaining the focal position of the lens when the temperature changes.

(2) The base plate 2 may not be provided with the reference positioning holes, and the hole diameters of the four through holes 22 are all larger than the diameters of the portions of the screws or the pins corresponding to the through holes 22. In this case, the substrate 2 can be merely expanded without generating slippage with respect to the holder 1, and the centers of both the holder 1 and the substrate 2 are more easily kept aligned.

(3) The different features of the embodiments may be combined as appropriate.

While five embodiments of the present invention have been described and illustrated herein, those skilled in the art will readily envision other means or structures for performing the functions and/or obtaining the structures described herein, and each of such variations or modifications is deemed to be within the scope of the present invention.

Claims

An image pickup apparatus of kinds, characterized in that:

a lens unit (11);

a holder (1), the holder (1) holding the lens unit (11);

a substrate (2), wherein a sensor (21) is connected to the substrate (2), and light can be irradiated to the sensor (21) through the lens unit (11);

a fastener (3) by which the holder (1) and the base plate (2) are connected at , and the holder (1) and the base plate (2) are relatively slidable in a direction perpendicular to the optical axis, and

the elastic piece (4) is directly or indirectly pressed against the fastening piece (3), and the fastening piece (3) extrudes the elastic piece (4) along the optical axis direction (A) so that the holding piece (1) and the substrate (2) are tightly attached to .
2. The imaging device according to claim 1, wherein the holder (1) and the base plate (2) are connected together at by a plurality of fasteners (3), at least some of the fasteners (3) of the plurality of fasteners (3) being pressed directly or indirectly against the elastic member (4).
3. The imaging device according to claim 1, wherein the holder (1) is provided with a threaded hole (13), the substrate (2) is provided with a plurality of through holes (22), the fastening member (3) is a screw (3a), the screw (3a) is screwed into the threaded hole (13) through the through hole (22) so that the holder (1) and the substrate (2) are connected together at , and at least a part of the through hole (22) has a diameter larger than a diameter of a portion of the screw (3a) located in the through hole (22) so that the holder (1) and the substrate (2) can relatively slide in a direction perpendicular to an optical axis.
4. The imaging apparatus according to claim 1, wherein the base plate (2) is provided with a plurality of through holes (22), and the through holes (22) include reference positioning holes having an aperture equal to the diameter of the portion of the fastening member (3) located in the reference positioning holes or a plurality of adjustment holes having an aperture larger than the diameter of the portion of the fastening member (3) located in the adjustment holes.
5. The imaging device according to claim 1, characterized in that the substrate (2) is provided with a plurality of through holes (22), the fastener (3) is a stepped screw (3b), the stepped screw (3b) is provided with a step (31), and the step (31) is at least partially embedded in the through holes (22).
6. The imaging apparatus according to claim 1, wherein the substrate (2) is provided with a plurality of through holes (22), the through holes (22) include th through holes (22a), 22b, 22c, and 22d), the th through holes (22a) and the fourth through holes (22d) are located at diagonal positions, the second through holes (22b) and the third through holes (22c) are located at diagonal positions, the th through holes (22a), the third through holes (22c), and the fourth through holes (22d) are circular holes, and the second through holes (22b) are elongated holes extending in a direction of a line connecting the second through holes (22b) and the third through holes (22 c).
7. The imaging apparatus according to claim 6, wherein the th through hole (22a) and the fourth through hole (22d) have the same hole diameter and are larger than the third through hole (22c), the third through hole (22c) has a hole diameter equal to the diameter of the portion of the fastening member (3) located in the third through hole (22c), and the second through hole (22b) has a dimension perpendicular to the extending direction thereof equal to the hole diameter of the third through hole (22 c).
8. The imaging device according to claim 1, wherein the fastening member (3) is a stopper ring (3c), the holder (1) is provided with a pin (14), the pin (14) passes through the through hole (22) of the substrate (2), and the stopper ring (3c) and the elastic member (4) are sleeved on the pin (14) so that the holder (1) and the substrate (2) are connected together at .
9. The image pickup apparatus according to claim 1, wherein the elastic member (4) is a spring washer or a rubber washer.
10. The image pickup apparatus according to claim 9, wherein the spring washer has elasticity by bending and forms a bending line (41).