KR20210143697A - Camera module using for automobile - Google Patents

Abstract

According to one embodiment of the present invention, a camera module comprises: a lens unit; a first substrate having an electromagnetic circuit formed thereon; a third substrate disposed to be spaced apart from the first substrate, including a terminal for electrical connection to the outside, and having the electromagnetic circuit formed thereon; a second substrate disposed between the first and third substrates, electrically connected to the first and third substrates, and having the electromagnetic circuit formed thereon; a first support having one side coupled to the first substrate and the other side in contact with one surface of the second substrate to allow the first and second substrates to be spaced apart from each other at a regular interval; and a second support having one side coupled to upper parts of the second substrate and the first support and the other side in contact with one surface of the third substrate to allow the second and third substrates to be spaced apart from each other at a regular interval. Therefore, a malfunction of the camera module can be prevented.

Description

Camera module using for automobile}

The embodiment relates to a robust camera module capable of preventing the occurrence of displacement, damage, and the like from shock, vibration, and the like caused by external force.

The content described in this section merely provides background information for the embodiment and does not constitute the prior art.

A vehicle may be equipped with a camera module for various purposes. For example, when a car is parked, a camera module capable of securing a rear view may be mounted on the rear part of the car.

In addition, in the case of a recent traffic accident, the camera module may be used in the case of a car black box which is very useful for tracking the accident process, the cause of the accident, and the like. In addition, the case of using a camera module as a recognition device for clearly and easily grasping a situation in a blind spot that is difficult for a driver or passenger of a vehicle to visually check is also gradually increasing.

In recent years, a so-called smart car, that is, a collision warning system that detects and prepares for possible front and rear collisions in advance when driving a vehicle, and a control device mounted on the vehicle. There is an increasing number of automobiles equipped with a collision avoidance system that can directly avoid, and the development of related technologies is increasing.

The use of camera modules as a means of recognizing the external situation of such smart cars is increasing, and accordingly, the production and technology development of camera modules for automobiles is also increasing.

A camera module for a vehicle may include a plurality of printed circuit boards (PCBs), and each printed circuit board may be disposed at regular intervals. Since the camera module including each printed circuit board is mounted on a moving vehicle, it experiences a lot of shock and vibration due to an external force compared to a camera module used for other purposes.

In particular, there is a high possibility that the plurality of printed circuit boards may be separated from their original positions due to shock and vibration caused by a continuous external force, and there is also a high possibility that the connector electrically connecting each printed circuit board may be damaged.

Therefore, there is a need for a rigid circuit board connection structure capable of preventing a plurality of printed circuit boards and connectors connecting them from being displaced or damaged from shock or vibration caused by an external force.

Accordingly, an object of the embodiment is to provide a robust camera module capable of preventing displacement, damage, etc. from occurring due to impact, vibration, or the like caused by external force.

The technical task to be achieved by the embodiment is not limited to the technical task mentioned above, and other technical tasks not mentioned will be clearly understood by those of ordinary skill in the art to which the embodiment belongs from the description below.

One embodiment of the camera module, the lens unit; a first substrate on which an electromagnetic circuit is formed; a third substrate disposed to be spaced apart from the first substrate and including a terminal for electrical connection to the outside and on which an electromagnetic circuit is formed; a second substrate disposed between the first and third substrates, electrically connected to the first and third substrates, and on which an electromagnetic circuit is formed; a first support having one side coupled to the first substrate and the other side in contact with one surface of the second substrate so that the first substrate and the second substrate are spaced apart from each other; and a second support coupled to an upper portion of the second substrate and the first support at one side and the other side in contact with one surface of the third substrate to maintain a predetermined distance between the second substrate and the third substrate. have.

In one embodiment of the camera module, a fastener for coupling the third substrate and the second support to each other may be provided.

In one embodiment of the camera module, an electromagnetic field shielding unit for accommodating the first substrate, the second substrate, and the third substrate and preventing external leakage of the electromagnetic field generated in each substrate may be provided.

The electromagnetic field shielding unit may have a through hole through which the fastener is fastened so that the electromagnetic field shielding unit and the third substrate are coupled to each other by the fastener.

In one embodiment of the camera module, a connector for electrically connecting the first substrate and the second substrate and the second substrate and the third substrate to each other may be provided.

The connector may be provided as a flexible circuit board.

The first support or the second support may include a small-diameter portion in which a male thread is formed; and a large-diameter portion in which a coupling groove in which a female screw thread corresponding to the male screw thread is formed is formed so that the small-diameter portion having the male screw thread formed in the center thereof can be screwed.

The large-diameter portion may have a circular cross-section in the width direction.

The large-diameter portion may be one in which a one-shaped depression passing through the center of the large-diameter portion is formed at an end in the width direction.

The large-diameter portion may be one in which a ten-shaped depression passing through the center of the large-diameter portion is formed at an end in the width direction.

The large-diameter portion may be formed in a hexagonal cross-section in the width direction.

The first substrate, the second substrate, and the third substrate may have insertion portions in which the small-diameter portion is inserted in corresponding portions.

The insertion part may be formed of a through hole or a recessed hole in which at least a portion is opened.

The insertion part may be provided with a female thread corresponding to the male thread so that the small-diameter part having the male thread can be screwed.

The small diameter portion of the first support is screwed to the insertion portion of the first substrate, the small diameter portion of the second support is screwed to the large diameter portion of the first support, and the second substrate is the large diameter portion of the first support. and the large-diameter portion of the second support.

The first support or the second support may be electrically connected to a grounding wire.

Another embodiment of the camera module, the lens unit; a first substrate on which an electromagnetic circuit is formed; a second substrate disposed to be spaced apart from the first substrate and including a terminal for electrical connection to the outside and on which an electromagnetic circuit is formed; a first support having one side coupled to the first substrate and the other side in contact with one surface of the second substrate so that the first substrate and the second substrate are spaced apart from each other; and an electromagnetic field shielding unit for accommodating the first and second substrates and preventing external leakage of electromagnetic fields generated in each of the substrates.

Another embodiment of the camera module, the lens unit; a control circuit board for controlling the lens unit; a power supply circuit board disposed above the control circuit board and electrically connected to the control circuit board to supply power to the control circuit board; one side is coupled to the circuit board for control and the other side is in contact with the lower surface of the circuit board for power supply so that the control circuit board and the circuit board for power supply maintain a predetermined distance; and a fastener for coupling the power supply circuit board and the support to each other.

According to the embodiment, each substrate is firmly fastened to each other at regular intervals by the support and fasteners, thereby improving the fastening force between the respective substrates.

In addition, since each substrate has a strong coupling structure, even if shock or vibration caused by external force occurs continuously, each substrate does not deviate from a predetermined position and maintains a constant distance between each other, so that the substrate is damaged and malfunctions of the camera module are prevented. can have an effect.

In addition, since each of the supports can be manufactured to have various lengths, there is an effect that the interval between each substrate can be easily adjusted.

In addition, since the distance between each board can be easily adjusted, the connector that electrically connects each board is provided with assembly tolerance so that the connector is not tightly coupled to each board, so that the connector can be prepared for shock or vibration. , it has the effect of preventing disconnection.

1 is a perspective view showing a camera module according to an embodiment.
2 is an exploded perspective view illustrating a camera module according to an embodiment.
3 is a side view illustrating a camera module according to an embodiment.
4A is a perspective view illustrating a part of an internal structure of a camera module according to an exemplary embodiment.
4B is a side view illustrating a part of an internal structure of a camera module according to an exemplary embodiment.
5 is a perspective view illustrating a first support or a second support according to an exemplary embodiment.
6 is a perspective view illustrating a first support or a second support according to another exemplary embodiment.
7 is a perspective view illustrating a first support or a second support according to another embodiment.
8 is a view for explaining the coupling structure of each substrate and the support of the camera module according to an embodiment.
9 is a view for explaining the coupling structure of each substrate and the support of the camera module according to another embodiment.

Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings. Since the embodiment can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiment to a specific disclosed form, and it should be understood to include all modifications, equivalents, and substitutions included in the spirit and scope of the embodiment. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Terms such as “first” and “second” may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment.

In the description of the embodiment, in the case of being described as being formed in "up (up)" or "below (on or under)" of each element, on (on or under) ) includes both elements in which two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as "up (up)" or "down (on or under)", the meaning of not only the upward direction but also the downward direction based on one element may be included.

Further, as used hereinafter, relational terms such as "upper/upper/above" and "lower/lower/below" etc. do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used only to distinguish one entity or element from another entity or element.

In addition, a Cartesian coordinate system (x, y, z) may be used in the drawings. In the drawings, the x-axis and the y-axis mean a plane perpendicular to the optical axis. For convenience, the optical axis direction (z-axis direction) may be referred to as a first direction, the x-axis direction as a second direction, and the y-axis direction as a third direction. .

1 is a perspective view showing a camera module according to an embodiment. 2 is an exploded perspective view illustrating a camera module according to an embodiment. 3 is a side view illustrating a camera module according to an embodiment.

The camera module may include a lens unit 10 , a front cover 20 , a coupler 30 , a first sealing member 40 , a first sealing member 40 , and a bracket 50 .

The lens unit 10 serves to photograph an external subject, and although not shown, a lens barrel, a lens driving device for driving in a first direction for focusing the lens barrel, and a lens barrel in a direction perpendicular to the first direction A vibration compensating device for controlling the movement of the camera may be provided. In this case, the lens barrel may be configured as a single lens, or may be provided in a form in which a plurality of lenses are aligned in the first direction.

In addition, since the lens unit 10 is coupled to the front cover 20 by a method such as shape fitting or interference fitting, moisture, dust, etc. A sealing device for blocking the inflow of foreign substances into the camera module may be provided.

The front cover 20 has a lens unit 10 mounted on the front part. To this end, a hollow portion in which the lens unit 10 is mounted may be formed in the front portion of the front cover 20 . The front cover 20 may be coupled to the bracket 50 at the rear portion. The coupling between the front cover 20 and the bracket 50 may be made, for example, by a coupling member 30 as shown in FIG. 2 .

The coupler 30 may serve to couple the front cover 20 and the bracket 50 . For the fastening of the coupler 30 , for example, as shown in FIG. 3 , a hole is formed in the bracket 50 , and a groove is formed in the front cover 20 at a portion corresponding to the hole of the bracket 50 . can do.

In the embodiment, since a hole is formed in the bracket 50 , the first escape groove 51 for the coupler 30 is formed so that the coupler 30 is easily fastened to the front cover 20 and the bracket 50 . can However, when the coupling structure of the bracket 50 and the front cover 20 using the coupling hole 30 is different, or when the bracket 50 and the front cover 20 are coupled without using the coupling member 30, the first The first escape groove 51 may not be formed.

For example, when the coupler 30 is fastened in the opposite direction to that of the above embodiment, that is, a hole is formed in the front cover 20 and a groove is formed in the bracket 50 to When the coupling hole 30 is fastened from the hole of the front cover 20 to the groove direction of the bracket 50 at the time of fastening, there is no need to form the first escape groove 51 .

In another embodiment, in the case of coupling the front cover 20 and the bracket 50 in a shape-fitting or interference-fitting manner without using the coupler 30, since the coupler 30 is not required, even at this time, There will be no need to form the first escape groove 51 .

The first sealing member 40 is disposed at the coupling portion of the front cover 20 and the bracket 50, and is a gap between the coupling portion of the front cover 20 and the bracket 50 to collect moisture, dust and other foreign substances inside the camera module. It can play a role in blocking the inflow.

The first sealing member 40 has an appropriate size and shape so that it can be disposed at a portion that can effectively block the gap between the coupling portion of the front cover 20 and the bracket 50, for example, as shown in FIG. 2 . Gaskets, O-rings, and other suitable types can be used.

The bracket 50 is combined with the front cover 20, accommodates most of the components of the camera module, and allows these components to be sealed with the outside, so that the components of the camera module accommodated by external impact are damaged, malfunction It can play a role in preventing the inflow of moisture, dust, and other foreign substances from the outside into the camera module.

As described above, in the bracket 50 , a first escape groove 51 for the coupler 30 may be formed so that the coupler 30 is easily fastened to the front cover 20 and the bracket 50 . . However, as described above, the coupling structure of the front cover 20 and the bracket 50 is different, or the front cover 20 and the bracket 50 are formed in a shape fitting or interference fitting method without using the coupling tool 30 . ), the first escape groove 51 may not be formed when they are combined.

A protrusion 52 may be formed at the rear of the bracket 50 , which is formed to seal a portion on which an external cable and an external cable electrically connected to the camera module are mounted. Inside the protrusion 52, a terminal 70, a cable having one end electrically connected to the terminal 70 (not shown), a cable through portion 80, a bushing 90, and a second sealing member 91 may be accommodated. can Hereinafter, the components will be described in detail.

The camera module may include a connector 60 , a terminal 70 , a cable through portion 80 , a bushing 90 , and a second sealing member 91 .

The connector 60 electrically connects the first and second substrates 200 - 1 and 200 - 2 and the second substrate 200 - 2 and the third substrate 200 - 3 to each other, which will be described later. can play a role A specific structure of the connector 60 will be described later.

The terminal 70 is disposed to be coupled to the third substrate 200 - 3 to be described later and may serve to electrically connect to the outside of the camera module. Power from a cable connected to the terminal 70 is supplied to the third board 200-3 provided inside the camera module, and the second board 200-3 is electrically connected to the connector 60 by a connector 60 . It is supplied to the substrate 200-2 and the first substrate 200-1.

In addition, the first substrate 200-1 is electrically connected to the lens unit 10 and includes the above-described lens driving device included in the lens unit 10 by electric power supplied through the first substrate 200-1; A stabilization device or the like may work.

The cable through portion 80 may be formed of a hollow member to accommodate a portion of the terminal 70 in the hollow portion, and a cable coupled to the terminal 70 may be disposed through the hollow portion.

On the other hand, it is appropriate to firmly couple the terminal 70 and the cable so as not to be disconnected by soldering or a bonding method using an electrically conductive adhesive.

The bushing 90 is coupled with the cable through portion 80 in such a way that one side is fitted to the inner circumferential surface of the cable through portion 80 or, conversely, one side of the cable through portion 80 is fitted to the inner circumferential surface of the bushing 90 . and may serve to extend the cable through portion 80 .

Accordingly, the bushing 90 may have a hollow portion communicating with the cable through portion 80 , and the cable may be disposed through the hollow portion. On the other hand, when the cable through portion 80 is formed to be sufficiently long, the bushing 90 may not be provided separately. Whether to provide a separate bushing 90 or to use only the cable through portion 80 may be appropriately selected in consideration of the size, shape, and arrangement of components of the camera module.

The second sealing member 91 is disposed in a gap between the end of the bushing 90 or the cable passing-through part 80 and the protrusion 52 of the bracket 50, and moisture, dust, and other foreign substances are trapped inside the camera module through the gap. It can play a role in blocking the inflow.

Therefore, the second sealing member 91 is provided in a generally cylindrical shape, the inner peripheral surface is fitted to be in close contact with the outer peripheral surface of the bushing 90 or the cable through-portion 80, the outer peripheral surface of the hollow formed in the protrusion (52) It can be fitted so as to be in close contact with the inner circumferential surface.

4A is a perspective view illustrating a part of an internal structure of a camera module according to an exemplary embodiment. 4B is a side view illustrating a part of an internal structure of a camera module according to an exemplary embodiment.

5 is a perspective view illustrating a first support 100-1 or a second support 100-2 according to an exemplary embodiment. 6 is a perspective view illustrating a first support 100-1 or a second support 100-2 according to another exemplary embodiment. 7 is a perspective view illustrating a first support 100-1 or a second support 100-2 according to another exemplary embodiment.

8 is a view for explaining the coupling structure of each substrate and the support of the camera module according to an embodiment. 9 is a view for explaining the coupling structure of each substrate and the support of the camera module according to another embodiment.

Inside the camera module, as shown in FIGS. 4A and 4B , a first substrate 200-1, a second substrate 200-2, a third substrate 200-3, and a first support 100-1 ), a second support 100-2, and a connector 60 may be provided.

The first substrate 200 - 1 may be disposed in a position adjacent to the lens unit 10 , an electromagnetic circuit including an image sensing unit (not shown) may be formed, and light transmitted through the lens unit 10 may be formed. The image of the subject may be captured by the image sensing unit, and the sensed image may be converted into an electrical signal and transmitted to an external image storage device and/or an image reproducing device. However, converting the sensed image into an electrical signal may also be performed on the second substrate 200 - 2 .

Meanwhile, an electromagnetic circuit for controlling the lens unit 10 may be formed on the first substrate 200 - 1 . That is, the first substrate 200-1 receives power from an external power source through the cable, the third substrate 200-3, and the second substrate 200-2, and the lens driving device of the lens unit 10; You can control the stabilization device.

The third substrate 200 - 3 is disposed to be spaced apart from the first substrate 200 - 1 at a predetermined distance, includes a terminal 70 for electrical connection to the outside, and an electromagnetic circuit can be formed therein. A second substrate 200-2 is disposed between the first substrate 200-1 and the third substrate 200-3, and the first substrate 200-1 and the third substrate 200-3 is electrically connected to and an electromagnetic circuit may be formed.

The second substrate 200-2 and the third substrate 200-3 supply power required to the first substrate 200-1, and apply the power to the sensed image transmitted from the first substrate 200-1. It may serve to transmit an electrical signal to an external image storage device and/or an image reproducing device.

For example, the second substrate 200-2 converts the sensed image transmitted from the first substrate 200-1 into an electrical signal and transmits it to an external image storage device and/or image reproducing device, or the third substrate The power input from 200 - 3 may be rectified and transmitted to the first substrate 200 - 1 . That is, the second substrate 200-2 is disposed between the first substrate 200-1 and the third substrate 200-3, and the first substrate 200-1 and the third substrate 200-3 are disposed. This role may be partially divided and performed.

The third substrate 200-3 mainly supplies electric power necessary for the operation of the lens unit 10, and applies the sensed images transmitted from the first substrate 200-1 and the second substrate 200-2. It may serve to transmit an electrical signal to an external image storage device and/or an image reproducing device.

Accordingly, elements such as a capacitor, a rectifier, and a transformer may be mounted on the third substrate 200 - 3 for supplying power having an appropriate voltage and current required for the operation of the lens unit 10 . In addition, the third board 200-3 may be equipped with a terminal 70 to which the end of the cable is coupled as described above for electrical connection to an external image storage device, an image reproducing device, a camera module control device, and the like. .

As described above, elements occupying a certain volume, such as a capacitor, a rectifier, a transformer, and a terminal 70, are mounted on the first substrate 200-1, the second substrate 200-2, and the third substrate 200-3. Alternatively, since they can be combined, a certain distance is formed between the respective substrates, and a device is required to maintain a constant distance between the respective substrates even when an impact or vibration is applied to the camera module by an external force.

Such a device may be implemented by a support exemplified by the first support 100 - 1 and the second support 100 - 2 as an embodiment to be described later. The specific structure of the support will be described below.

Meanwhile, as shown in FIGS. 8 and 9 , each of the first substrate 200-1, the second substrate 200-2, and the third substrate 200-3 has a second escape groove at its edge. 220 may be formed. This is because each substrate needs to have a shape corresponding to the first escape groove 51 formed in the bracket 50 in order to be easily accommodated in the bracket 50 .

Therefore, as described above, when the formation of the first escape groove 51 is not required, that is, the bracket 50 using the coupler 30 and the coupler 30 of the front cover 20 are different, or When the bracket 50 and the front cover 20 are coupled without using the coupling hole 30, the first escape groove 51 may not be formed. In this case, the second escape groove 220 may not be formed. can

Meanwhile, each of the substrates may be formed of a printed circuit board (PCB), and may be manufactured in such a way that elements necessary for each printed circuit board are mounted. In addition, it is appropriate for each substrate to be formed of a solid material in order to maintain a constant distance from each other even when an impact or vibration is applied to the camera module by an external force.

The connector 60 may serve to electrically connect each board to each other. For example, as shown in FIG. 4A , a connector 60 electrically connecting the first substrate 200-1 and the second substrate 200-2 to each other, the second substrate 200-2, and the second substrate 200-2 A connector 60 for electrically connecting the three substrates 200 - 3 to each other may be provided in the camera module.

In the embodiment, one connector 60 for connecting each board to each other is provided on the side of each board, but it is not limited thereto, and the number of connectors 60 in consideration of the circuit structure of each board and the overall structure of the camera module , the placement position can be selected.

It is appropriate for the connector 60 to be formed of a flexible material capable of absorbing these shocks and vibrations so as not to be damaged by shocks and vibrations applied from the outside of the camera module to the point that it is easy to combine with each board. In this way, the connector 60 may be formed of a flexible circuit board.

However, the present invention is not limited thereto, and a strong material may be used as long as it is resistant to shock and vibration, and the connector 60 may be formed using a wire bundle. In addition, soldering, an adhesive method using an electrically conductive adhesive, a shape fitting, an interference fitting method, etc. may be used for bonding the connector 60 and each board. The connector 60 may serve as a board to board (B2B) connector 60 electrically connecting each board.

One side of the first support 100-1 is coupled to the first substrate 200-1 and the other side is in contact with one surface of the second substrate 200-2 to form the first substrate 200-1 and the first support 100-1. The second substrate 200 - 2 may serve to maintain a predetermined interval.

One side of the second support 100-2 is coupled to the second substrate 200-2 and the first support 100-1, and the other side is in contact with one surface of the third substrate 200-3. The second substrate 200-2 and the third substrate 200-3 may serve to maintain a predetermined distance.

The first support 100-1 and the second support 100-2 are the first substrate 200-1 and the second substrate 200-2, and the second substrate 200-2 and the third substrate 200. -3) The specific shape may be the same except for the point where the interval between them is kept constant, and therefore the arrangement position is different. Accordingly, the specific structures of the first support 100-1 and the second support 100-2 having the same shape will be described in detail below with reference to FIGS. 7 to 9 .

The support collectively referred to as the first support 100 - 1 and the second support 100 - 2 may include a small diameter portion 110 and a large diameter portion 120 . The small-diameter portion 110 is a portion having a length in the width direction smaller than that of the large-diameter portion 120 , and a male thread may be formed on an outer circumferential surface thereof.

In the center of the large-diameter portion 120 , a coupling groove 121 in which a female thread corresponding to the male thread is formed may be formed so that the small-diameter portion 110 having the male screw thread can be screwed thereinto. Accordingly, the small-diameter portion 110 of the other support may be coupled to the coupling groove 121 of the large-diameter portion 120 .

In this case, as shown in FIG. 5 , the large-diameter portion 120 may have a hexagonal cross-section in the width direction. This is to enable the small diameter portion 110 of the support to be fastened to the insertion portion 210 of each substrate or the coupling groove 121 of another support using a tool such as a wrench.

In addition, as shown in FIG. 6 in another embodiment, the large-diameter portion 120 may have a circular cross-section in the width direction, and the end of the large-diameter portion 120 passes through the center of the large-diameter portion 120 . A ten (十)-shaped depression 122-1 may be formed in the width direction. This is to enable the small-diameter portion 110 of the support to be fastened to the insertion portion 210 of each substrate or the coupling groove 121 of another support using a tool such as a cross-shaped screwdriver.

In addition, as shown in FIG. 7 in another embodiment, the large-diameter portion 120 may have a circular cross-section in the width direction, and the center of the large-diameter portion 120 may be formed at the end of the large-diameter portion 120 . A passing one-shaped recessed portion 122 - 2 may be formed in the width direction. This is to enable the small diameter portion 110 of the support to be fastened to the insertion portion 210 of each substrate or the coupling groove 121 of the other support using a tool such as a straight screwdriver.

Although several embodiments of the large-diameter portion 120 or the recessed portion have been described above, the present invention is not limited thereto, and the large-diameter portion 120 or the recessed portion may be formed in various shapes according to the type of tool for fastening the support.

On the other hand, as shown in FIGS. 8 and 9 , the first substrate 200-1, the second substrate 200-2, and the third substrate 200-3 have the first substrate at corresponding portions. An insertion part 210 into which the small-diameter part 110 of the support 100-1 or the second support 100-2 is inserted may be formed. As an embodiment of the insertion unit 210 , as shown in FIGS. 9 and 9 , the insertion unit 210 may be formed as a through hole.

In another embodiment of the insertion part 210 , at least a portion of which is opened may be formed as a recessed hole. The recessed hole is formed at the edge of each substrate to form a through hole in the vertical direction of each substrate, and in the lateral direction, a part meets the end of the substrate and means the insertion part 210 in which a part of the hole is opened. .

8 is a view for explaining the coupling structure of each substrate and the support of the camera module according to an embodiment. As shown in FIG. 8 , the first substrate 200-1, the second substrate 200-2, and the third substrate 200-3 are disposed to be spaced apart from each other, and the first substrate 200-1 and The first support 100-1 is disposed between the second substrates 200-2, and the second support 100-2 is disposed between the second substrate 200-2 and the third substrate 200-3. can be placed.

Meanwhile, in the embodiment, a fastener 400 for coupling the third substrate 200 - 3 and the second support 100 - 2 to each other may be provided. The fastener 400 penetrates through the insertion portion 210 formed in the third substrate 200-3, and one end thereof is inserted into the defect groove formed in the large-diameter portion 120 of the second support 100-2. can be contracted. As the fastener 400, various types of screws, coupling pins, and the like may be used.

Due to this structure, the small-diameter portion 110 of the first support 100-1 is screwed to the insertion portion 210 of the first substrate 200-1, and the second support 100-2 is The small-diameter portion 110 is screwed to the large-diameter portion 120 of the first support 100-1, and the second substrate 200-2 is the large-diameter portion 120 of the first support 100-1. ) and the large-diameter portion 120 of the second support 100-2, the first support 100-1, the second support 100-2, and the fastener 400 are fastened to each substrate. and the coupling structure between each support and fastener 400 is completed.

The first substrate 200-1, the second substrate 200-2, and the third substrate 200-3 are a first support 100-1, a second support 100-2, and a fastener 400. ) and arranged at regular intervals from each other, and since this coupling structure is strong, each substrate may not deviate from a predetermined position against shock and vibration caused by external force.

Meanwhile, the first support 100-1 or the second support 100-2 may be electrically connected to a grounding wire. In this case, the grounding wire may be provided as one of a plurality of cables coupled to the terminal 70 . By connecting the grounding wire to the first support 100-1 or the second support 100-2, damage to each board or occurrence of a short is prevented from a sudden surging voltage that may occur in each board. can do.

9 is a view for explaining the coupling structure of each substrate and the support of the camera module according to another embodiment. In another embodiment, as shown in FIG. 9 , the electromagnetic field shielding unit 300 is added in the embodiment shown in FIG. 8 .

The electromagnetic field shielding unit 300 accommodates the first substrate 200-1, the second substrate 200-2, and the third substrate 200-3 and prevents external leakage of the electromagnetic field generated in each substrate. can play a role The electromagnetic shielding unit 300 may be coupled to the third substrate 200 - 3 by a fastener 400 to be disposed inside the camera module.

To this end, the electromagnetic field shielding unit 300, the fastener 400 is fastened so that the electromagnetic field shielding unit 300 and the third substrate 200 - 3 are coupled to each other by the fastener 400 . A through hole 310 may be formed. Accordingly, the fastener 400 passes through the through hole 310 and the insertion portion 210 formed in the third substrate 200-3, and one end thereof is the large diameter portion of the second support 100-2. It may be fastened to the coupling groove 121 formed in the 120 .

A third escape groove 320 may be formed in the electromagnetic shielding unit 300 , which is a first escape groove 51 formed in the bracket 50 so that each substrate is easily accommodated in the bracket 50 . ), because it is necessary to have a shape corresponding to the second escape groove 220 formed to correspond thereto.

Therefore, as described above, when the formation of the first escape groove 51 is not required, that is, the coupling structure of the bracket 50 and the front cover 20 using the coupling member 30 is changed, or the coupling member 30 is used. ) without using the bracket 50 and the front cover 20, since the first escape groove 51 may not be formed, in this case, the third escape groove 320 may not be formed.

On the other hand, as another embodiment of the camera module, even when having two substrates, a coupling structure similar to the above-described structure may be formed.

For example, when a control circuit board for controlling the lens unit 10, a power supply circuit board for supplying power to the lens unit 10 and the control circuit board are built into the camera module, in the above embodiment, Except for the second substrate 200-2 and the first support 100-1, the first substrate 200-1, the third substrate 200-3, the second support 100-2, and the fastener 400 ) can be used to form a bonding structure similar to the assembled one.

That is, the circuit board for control, the circuit board for power supply, the support, and the fastener 400 can form a structure in which the two substrates are firmly coupled with a predetermined interval. In this case, unlike the above embodiment, only one connector 60 may be provided. In addition, it is natural that the electromagnetic shielding unit 300 may be disposed similarly to the above embodiment.

In addition, even when four or more substrates are arranged at regular intervals, it is of course possible to form a uniform and strong coupling structure between the respective substrates with a structure similar to that of the above embodiment.

According to the embodiment, each substrate is firmly fastened to each other at regular intervals by the support and the fastener 400 , thereby improving the fastening force between the respective substrates.

In addition, since each substrate has a strong coupling structure, even if shock or vibration caused by external force occurs continuously, each substrate does not deviate from a predetermined position and maintains a constant distance between each other, so that the substrate is damaged and malfunctions of the camera module are prevented. can have an effect.

In addition, since each of the supports can be manufactured to have various lengths, there is an effect that the interval between each substrate can be easily adjusted.

In addition, since the distance between each board can be easily adjusted, an assembly tolerance is given to the connector 60 that electrically connects each board, so that the connector 60 is not tightly coupled to each board to prepare for shock or vibration. There is an effect that can prevent damage and disconnection of the connector 60 by making it possible.

Although only a few have been described as described above in relation to the embodiments, various other forms of implementation are possible. The technical contents of the above-described embodiments may be combined in various forms unless they are incompatible with each other, and may be implemented as a new embodiment through this.

100-1: first support
100-2: 2nd support
110: small diameter part
120: Daegyeongbu
121: coupling groove
122-1: cross-shaped depression
122-2: straight depression
200-1: first substrate
200-2: second substrate
200-3: third substrate
210: insertion part
220: second escape home
300: electromagnetic shielding unit
310: through hole
320: third escape home
400: fastener

Claims (15)

lens unit;
a first substrate;
a second substrate spaced apart from the first substrate;
a plurality of first supports for maintaining a constant distance between the first substrate and the second substrate while supporting the first substrate; and
and an electromagnetic field shielding unit for accommodating the first and second substrates and preventing external leakage of electromagnetic fields generated on the respective substrates. According to claim 1, wherein each of the first support is formed with a coupling groove having a female thread in the center, and a large-diameter portion contacting one surface of the first substrate, and a male thread is formed in the center to one surface of the second substrate A camera module including a contacting small-diameter portion. 3. The method of claim 2,
a terminal disposed on the other surface of the first substrate opposite to the one surface of the first substrate; and
A camera module including a fastener including a first portion in contact with the other surface of the first substrate and a second portion inserted into the insertion hole of each of the first supports. The camera module of claim 3 , wherein the electromagnetic field shielding unit includes a through hole through which the fastener is fastened so that the electromagnetic field shielding unit and the first substrate are coupled to each other by the fastener. The camera module of claim 2 , wherein the large-diameter portion has a circular cross-section in the width direction. The camera module according to claim 2, wherein the large-diameter portion has a one-shaped recessed portion passing through the center of the large-diameter portion at an end thereof in the width direction. The camera module according to claim 2, wherein the large-diameter portion is formed with a ten-shaped recessed portion passing through the center of the large-diameter portion at an end of the large-diameter portion in the width direction. The camera module of claim 2 , wherein the large-diameter portion has a cross-section in the width direction in a hexagonal shape. The camera module of claim 2 , wherein the second substrate includes a plurality of insertion portions into which small-diameter portions of each of the first supports are inserted. The camera module of claim 9 , wherein each of the insertion portions is formed as a recessed hole in which at least a portion is opened. The camera module of claim 9 , wherein each of the insertion portions is provided with a female thread to be screwable with each of the small-diameter portions. The camera module of claim 2 , wherein each of the first supports is electrically connected to a grounding wire. The camera module of claim 1 , further comprising a connector electrically connecting the first substrate and the second substrate to each other. The camera module according to claim 13, wherein the connector is formed of a flexible circuit board. According to claim 1,
a third substrate spaced apart from the second substrate; and
The camera module further comprising a second support for maintaining a constant distance between the second substrate and the third substrate while supporting the second substrate.

Images