A camera module with independent AF module and OIS module

Abstract

The present invention belongs to the technical field of VCM motors, and discloses a camera module with independent AF module and OIS module, comprising a housing; a sensor anti-shake component for carrying a sensor and an AF module for carrying a lens module are provided in the housing; the sensor anti-shake component and the AF module are independently connected to the housing. The structural design of the present invention adopts that the AF unit and the lens are structurally independent from the OIS unit, so that the optical axis can be adjusted while assembling the two components, thereby improving assembly efficiency and yield, and reducing manufacturing costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of VCM motors, and in particular relates to a camera module with independent AF module and OIS module. Background Art

[0002] The VCM motor is a device that converts electrical energy into mechanical energy and achieves linear and limited swing angle motion. It is a device that uses the interaction between the magnetic field from the permanent magnet and the magnetic poles in the magnetic field generated by the energized coil conductor to produce regular motion. Because the voice coil motor is a non-commutated power device, its positioning accuracy depends entirely on the feedback and control system and has nothing to do with the voice coil motor itself. The emergence of the VCM motor has transformed the smartphone camera from fixed focus to autofocus, while giving small or micro cameras an anti-shake function. Its biggest function is that the camera can automatically focus and provide motion compensation.

[0003] The VCM of the mobile phone camera needs the cooperation of DriverIC to complete the focus and anti-shake. The existing VCM controls the size of the VCM power supply current through DriverIC to determine the distance the lens carried by the VCM moves, so as to adjust it to the appropriate position to capture a clear image. The VCM motor actually moves based on the principle that the energized coil is subjected to force in the magnetic field. Precise control requires the help of some external components, among which the DriveIC is used to control and output the size and time of the current, thereby controlling the position that the voice coil driver needs to reach. In the mobile phone, all the control information of the DriveIC is given by the SoC, and the control logic and specific parameters are obtained by engineers through repeated adjustments during the design and manufacturing process.

[0004] At present, in the VCM motor market, ordinary VCM motors (open-loop motors) occupy the vast majority of the market share, up to 80%, and closed-loop motors account for 6%. Although both closed-loop motors and OIS motors have received great attention and are sought after, OIS motors have problems in terms of mass production and sales, such as tight resources, lack of technology, complex production process, high production difficulty, low yield, high cost, slow focusing speed, and high power consumption. Among them, the main factor causing this problem is that most of the existing OIS motors use lens anti-shake design, and this structure is bound to cause the separate electromagnetic anti-shake component to occupy a large amount of internal space, and the complex structural design and motion control are bound to bring greater obstacles to the assembly and manufacturing process, resulting in a low yield and high manufacturing cost. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a camera module with independent AF module and OIS module, which adopts an AF unit, a lens and an OIS unit that are structurally independent, and thus has the advantage of being able to adjust the optical axis while assembling the two components.

[0006] The technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention discloses a camera module with independent AF module and OIS module, comprising a housing; a sensor anti-shake component for carrying a sensor and an AF module for carrying a lens module are provided in the housing;

[0008] The sensor anti-shake component and the AF module are independently connected to the housing.

[0009] First, the present invention discloses a miniature camera module with a small size and complete functional modules, which can be installed in small electronic devices such as mobile phones and tablets. The principle is to adjust the focal length through the lens module and introduce external light into the built-in imaging sensor, so as to transmit image information to the outside through the cable after signal processing.

[0010] Among them, the lens module includes multiple lenses that are packaged in one piece, and a better optical path adjustment effect can be achieved by adjusting the internal spacing and lens specifications. The light coming out of the lens module is at a fixed angle, so the focal length is adjusted by axially moving the entire lens. Generally, camera modules have an autofocus function, that is, an actuator unit is set inside or outside the AF module, and the supporting components are controlled by electronic control to drive the lens module to move, and the action command is input through an external device for control.

[0011] The camera module in the present invention also includes an imaging sensor, which is fixed on a supporting plate and receives light from the lens module to form a digital signal for external transmission. Existing imaging sensors include fixed structures and movable structures. The fixed structure fixes the supporting plate in the housing of the camera module and connects it to the external circuit through a cable to energize the imaging sensor. In order to improve the anti-shake effect of the entire camera module in the prior art, an actuating assembly is also set on the imaging sensor, so that the imaging sensor can also move within a certain range in the camera module, thereby providing a certain amount of motion compensation.

[0012] In the prior art, the AF module and the imaging sensor are not only arranged in the same camera module, but also have internal structures connected. When the optical axis needs to be adjusted after assembly, it needs to be adjusted synchronously. Since some structures are connected to each other, multiple components need to be associated and adjusted simultaneously during debugging, which is difficult and easy to cause component damage. However, the AF module and the sensor in the present invention are two independent parts arranged in the same housing, and are independently connected to the housing. Not only can the corresponding effect be achieved, but also, because they are independent structures, they can be adjusted separately, which improves the adaptation efficiency and reduces the process difficulty.

[0013] In combination with the first aspect, the present invention provides a first implementation manner of the first aspect, wherein the AF module comprises an AF shell, and the AF shell is provided with a boss overlapped with the outer shell.

[0014] In the entire camera module, one side has an opening for the lens module to pass through and move along the axis, and the other end has a sensor support plate fixed to the inner bottom surface. The lens module is fixed in the AF module, and the AF module is connected to the shell. Specifically, the opening on the shell is for the lens module to pass through, and the opening diameter can also be enlarged, so that the external AF module can be directly inserted into the shell from the opening, and the boss on the outer wall of the AF shell cooperates with the shell to achieve a limiting effect.

[0015] The so-called boss refers to a protruding end on the outside of the AF housing, which has a certain length and width and can be "overlapped" on the edge of the shell opening to achieve pre-positioning. The overlap is to limit the AF module from moving further into the shell. Under the action of natural gravity alone, the overlap between the boss and the shell plays a supporting role. Since the pre-positioning is only to assemble it in the shell, the AF module has a certain amount of room for movement at this time, and can be fixed to the shell by gluing or other means after adjusting the optical axis, so it has a high degree of flexibility.

[0016] In combination with the first embodiment of the first aspect, the present invention provides a second embodiment of the first aspect, wherein the housing has an opening, and a slot is provided on an outer edge of the opening, and the boss is engaged with the slot for limiting position.

[0017] The so-called card slot is a groove structure with multiple grooves corresponding to the bosses on its opening end surface. When the AF module is inserted from the opening of the shell, the bosses at its end are aligned with the card slots. When the bosses contact the card slots, a certain external force is applied to make them sink into the card slots to achieve the card connection. At this time, since the lens module in the AF module has a certain range of motion, the optical axis calibration can be achieved by adjusting the lens module.

[0018] In combination with the first embodiment of the first aspect, the present invention provides a third embodiment of the first aspect, wherein the housing has an opening, and an annular groove is provided on the outer edge of the opening, and the boss is connected to the annular groove.

[0019] Generally, the outer end of the AF module is provided with multiple bosses, and the bosses are distributed at the same central angle as the axis of the lens module, and the width of the annular groove is greater than or equal to the width of the bosses. When the AF module is set in the housing, all the bosses can sink into the sinking groove and contact the bottom surface of the sinking groove. Since there are multiple bosses, the annular groove does not need to align the bosses with the groove structure, which is convenient for installation and setting.

[0020] In combination with the third embodiment of the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein a cable outlet is provided on any of the bosses for the AF cable of the AF module to pass through and connect to the circuit in the housing.

[0021] In combination with the fourth implementation of the first aspect, the present invention provides a fifth implementation of the first aspect, wherein a cable groove communicating with the annular groove is provided on the housing, and the AF cable passes through the cable groove.

[0022] In combination with the first to fifth embodiments of the first aspect, the present invention provides a sixth embodiment of the first aspect, wherein the AF module also includes a bracket and a plurality of focus actuation components arranged in the AF shell, and the bracket carrying the lens module is controlled to move along the axis by the focus actuation components; the bracket is movably connected to the AF shell through an upper spring leaf and a lower spring leaf, and a top cover is provided on one side of the AF shell to limit the bracket.

[0023] The exterior of the AF module is composed of two parts that fit together, namely the AF housing and the top cover. The AF housing is a ring-shaped part with through openings on both sides. One side has a smaller opening that corresponds to the light-emitting end of the lens module to avoid blocking the light. The other side opening is mainly used to match the top cover, and the device is installed from this side opening.

[0024] First, install the lower spring piece on the inner bottom of the AF base, and fix the outer end of the lower spring piece. Since the inner ends of the lower spring piece and the upper spring piece are fixed on the annular bracket, the upper spring piece, the bracket and the lens module set in the bracket also fall into the AF housing. Finally, after debugging, the top cover is fixed and buckled, so as to form a limiting effect on the bracket together with the smaller opening edge of the AF housing.

[0025] The focus actuator assembly is an electrically actuated structure commonly used in voice coil motors, and usually consists of two parts: a powered coil and a magnet. The two parts are respectively mounted on two components that are movably connected. Directed electricity is passed into the coil to generate a magnetic force between it and the magnet that is perpendicular to the plane connecting the two. The magnetic force causes the two components to move relative to each other to achieve a motion control effect.

[0026] The upper and lower reeds are both made of thin metal sheets, which are cut to form extremely narrow strip strings inside, so that they have a certain telescopic stroke and provide restoring force through their own elasticity in the telescopic state.

[0027] In combination with the sixth embodiment of the first aspect, the present invention provides a seventh embodiment of the first aspect, wherein one side of the top cover has an extension portion toward the inside of the AF shell, and a mounting groove for setting a circuit board is provided on the extension portion, and the circuit board is connected to an external circuit through an AF cable.

[0028] The beneficial effects of the present invention are:

[0029] The structural design of the present invention adopts that the AF unit and the lens are structurally independent from the OIS unit, so that the optical axis can be adjusted while assembling the two components, thereby improving assembly efficiency and yield and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an axial schematic diagram of the entire camera module of the present invention when assembled;

[0031] Figure 2 It is the first explosion axis of the entire camera module of the present invention;

[0032] Figure 3 is a second exploded view of the entire camera module of the present invention;

[0033] Figure 4 is an axial schematic diagram of the housing of the present invention;

[0034] Figure 5 It is a schematic diagram of the axial side of the entire AF module of the present invention when it is assembled;

[0035] Figure 6 is an axial schematic diagram of the AF housing of the present invention;

[0036] Figure 7 is a side view of the AF housing of the present invention;

[0037] Figure 8 is an exploded view of the entire AF module of the present invention;

[0038] Fig. 9 It is a front view of the entire camera module of the present invention after removing the lens;

[0039] Fig.10 The present invention Fig. 9 The schematic diagram of the cross section after cutting along the AA cutting line;

[0040] Fig.11 The present invention Fig.10 A is a magnified schematic diagram of the part in the middle;

[0041] Fig.12 It is a schematic diagram of the entire camera module of the present invention with the AF module removed.

[0042] In the figure: 1-lens module, 2-housing, 2.1-annular groove, 2.2-cable groove, 3-gasket, 4-sensor protection cover, 5-sensor anti-shake assembly, 6-bottom cover, 7-AF housing, 7.1-boss, 7.2-cable port, 7.3-bending part, 7.4-sunk platform, 8-top cover, 8.1-installation groove, 9-AF cable, 10-upper spring, 11-bracket, 12-focus actuator assembly, 13-Hall sensor, 14-lower spring. DETAILED DESCRIPTION

[0043] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] Embodiment 1:

[0051] This embodiment discloses a camera module with independent AF module and OIS module. The module is mainly arranged in a mobile terminal device, has a small size and a stable optical capture function, and can provide a stable camera capability for the mobile terminal device.

[0052] The entire camera module includes a housing 2; the housing 2 includes a sensor anti-shake component 5 for carrying a sensor and an AF module for carrying a lens module 1; the sensor anti-shake component 5 and the AF module are independently connected to the housing 2. The upper part of the sensor anti-shake component 5 is also provided with an independently buckled sensor protection cover 4.

[0053] The camera module also includes an imaging sensor, which is fixed on a supporting plate and receives light entering from the lens module 1 to form a digital signal for external transmission. Existing imaging sensors include two types: fixed structure and movable structure. The fixed structure fixes the supporting plate in the housing of the camera module and connects it to the external circuit through a cable to energize the imaging sensor. In the prior art, in order to improve the anti-shake effect of the entire camera module, an actuating assembly is also provided on the imaging sensor, so that the imaging sensor can also move within a certain range in the camera module, thereby providing certain motion compensation. In the present embodiment, a gasket 3 is provided in the module, which is attached to the inner wall of the outer shell 2, and an annular spring is provided at the lower part of the gasket 3, which is connected to the lower sensor assembly through the spring.

[0054] The AF module includes an AF housing 7, on which a boss 7.1 is provided that overlaps with the housing 2. The boss 7.1 refers to a protruding end portion on the outside of the AF housing 7, which has a certain length and width and can be "overlapped" on the edge of the opening of the housing 2 to achieve pre-positioning, and the overlap is to limit the AF module from continuing to move into the housing 2. Under the action of natural gravity only, the boss 7.1 overlaps with the housing 2 to play a supporting effect.

[0055] The housing 2 has an opening, and a slot is provided at the outer edge of the opening, and the boss 7.1 is engaged with the slot to limit the position. The slot is a slot structure with multiple grooves corresponding to the boss 7.1 on the end face of the opening. When the AF module is inserted from the opening of the housing 2, the boss 7.1 at the end is aligned with the slot up and down. When the boss 7.1 contacts the slot, a certain external force is applied to make it sink into the slot to achieve engagement. At this time, since the lens module 1 in the AF module has a certain range of motion, the optical axis calibration can be achieved by adjusting the lens module 1.

[0056] Embodiment 2:

[0057] This embodiment also discloses a camera module with independent AF module and OIS module, such as Figure 1-12 shown.

[0058] The entire camera module includes a housing 2 and a flat cable, wherein the flat cable is used to connect the circuit board of the mobile terminal device with the circuit board of the camera module to meet the needs of power supply and control electrical signal transmission.

[0059] The housing 2 is formed by two parts that are buckled together, specifically the housing 2 and the bottom cover 6. The bottom cover 6 has a buckle structure around it, which is snap-fitted with the hook groove on the inner wall of the bottom of the housing 2. The top of the housing 2 has a square opening, and the square opening is cut to form a hexagonal shape.

[0060] The housing 2 is provided with an imaging sensor and an OIS component, wherein the OIS component can perform motion compensation, thereby avoiding the problem of unstable imaging caused by the shaking of the external device. In this embodiment, a sensor anti-shake module is provided, and its OIS component is provided on the sensor to form a sensor anti-shake component 5, so that the sensor has a certain degree of freedom in the housing 2 and can be flipped. The sensor anti-shake module is provided with an actuating unit, which realizes motion control through the cooperation of a magnet and a coil, and also provides elastic restoring force through a spring sheet of a memory alloy material, so as to obtain stable and efficient motion control.

[0061] An AF module, i.e., an autofocus unit, is also provided on the upper part of the sensor. The AF module has a through channel for carrying and fixing the lens module 1. The lens module 1 in this embodiment is the same as the prior art, and is an independent integrated cylindrical structure with multiple lenses with fixed spacing built in, which has the function of converging light, and increases the lens resolution and contrast, and can improve the dispersion and reflection caused by glare through coating and size optimization of plastic lenses.

[0062] Since the lens module 1 is used for light transmission and the internal lens spacing is fixed, the angle of the light emitted from its tail is fixed. In order to realize the autofocus function, it is necessary to set an action component on the AF module to adjust the lens module 1 to perform axial movement in the housing 2.

[0063] Specifically, the entire AF module includes an AF housing 7 and a top cover 8 that are buckled with each other. Both the top cover 8 and the AF housing 7 are provided with openings, and the top cover 8 is buckled on one side of the AF housing 7 to form a restrictive effect on the components in the AF housing 7. A bracket 11 is provided in the AF housing 7, and an upper spring leaf 10 and a lower spring leaf 14 are respectively provided on the upper and lower sides of the bracket 11. The bracket 11 is connected to the AF housing 7 through the upper spring leaf 10 and the lower spring leaf 14. Since the spring leaves on both sides have a certain elastic extension length, the bracket 11 can move up and down along the axis in the AF housing 7.

[0064] like Figure 8 As shown, this figure is an exploded view of the entire AF module and the lens module 1 after being disassembled, which is used to show the internal components of the entire AF module and their correlation. It can be seen that the bracket 11 is an annular structure with a circular hole in the middle, and a focus actuator assembly 12 is provided at each end of the diameter of the circular hole. The focus actuator assembly 12 includes a coil and a magnet, wherein the coil is arranged on the bracket 11, and the magnet is fixed to the inner wall of the AF housing 7. The magnet is close to the coil, and the coil is a single-turn coil, and its two ends are connected to the external circuit through FPC or wiring. It generates a certain magnetic field through external input current, and cooperates with the magnet to realize the driving force on the bracket 11 in the axial direction, thereby achieving the zoom distance adjustment effect.

[0065] A limiting groove or a thread is provided in the circular hole in the middle of the bracket 11 , and the bracket 11 is connected to the external lens module 1 through the limiting groove and the thread.

[0066] Furthermore, since the optical axis of the entire camera module needs to be adjusted when it is assembled, there is a certain correlation between the sensor and the lens module 1 in the prior art, which is not convenient for adjustment. The sensor in this embodiment is set on a fixed plate, which is connected to the housing 2 through a spring, and is controlled by the sensor anti-shake assembly 5 set on the housing 2, the fixed plate and the bottom cover 6 to achieve flip anti-shake control. The AF module enters from the top opening of the housing 2 and contacts the edge of the opening at the top of the housing 2 to form a blocking limit.

[0067] Specifically, a boss 7.1 structure protruding outward is provided at each of the four side positions near the upper edge of the AF housing 7. The boss 7.1 structure is formed by the middle of the inner wall of the AF housing 7 being bent outward and extending for a certain length. A bend 7.3 similar to a cut corner is provided at the four corners of the AF housing 7. The bend 7.3 can improve the structural strength of the entire AF housing 7. At the same time, a sink 7.4 is provided at the lower part of the bend 7.3. The sink 7.4 is used to limit the movement of the internal bracket 11.

[0068] The external dimensions of the entire AF housing 7 are just smaller than or equal to the opening edge of the housing 2, so that the main part of the housing 7 can be sunk into the housing 2, and the four protruding bosses 7.1 are in contact with the opening edge of the housing 2 to form a barrier. At this time, the AF module and the lens module 1 are independent structures relative to the sensor and the sensor anti-shake component 5, and do not affect each other. Since the entire housing 2 will be placed forward on a certain table during assembly, and each component will be installed in turn, the AF module can be placed in the housing 2 and connected to the housing 2 under the action of its gravity.

[0069] An annular groove 2.1 is also provided at the edge of the top opening of the housing 2. The depth of the annular groove 2.1 is greater than or equal to the thickness of the boss 7.1, and the bottom width is also greater than the width of the boss 7.1. Figure 1 As shown, when the entire camera module is assembled, the boss 7.1 just falls into the annular groove 2.1, which has a certain pre-positioning effect, and then it is connected and fixed by gluing or welding.

[0070] It can also be seen in the figure that any of the bosses 7.1 has a cable outlet 7.2, that is, an opening is cut in the middle of the boss 7.1 for the AF cable 9 inside the AF module to fall out. A cable groove 2.2 corresponding to the cable outlet 7.2 is provided on one side of the annular groove 2.1, and the AF cable 9 partially fits the surface of the cable groove 2.2.

[0071] exist Figure 8 In the figure, a mounting groove 8.1 is provided on one side surface of the bracket 11, a magnet is provided in the mounting groove 8.1, and a PCB board with a Hall sensor 13 is provided on the inner wall of the AF housing 7, and the Hall sensor 13 is close to the magnet. When the magnet moves with the bracket 11, the Hall sensor 13 can determine the displacement and direction of the entire bracket 11 according to the change of the magnetic field, thereby forming a closed-loop control after external feedback.

[0072] The present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A camera module with an independent AF module and OIS module, comprising a housing (2); the housing (2) has a sensor anti-shake component (5) for carrying a sensor and an AF module for carrying a lens module (1); The sensor anti-shake component (5) and the AF module are independently connected to the housing (2); The AF module comprises an AF housing (7), and the AF housing (7) is provided with a boss (7.1) overlapping the outer shell (2); The housing (2) has an opening, and a slot is provided on the outer edge of the opening, and the boss (7.1) is engaged with the slot for limiting position; The housing (2) has an opening, and an annular groove (2.1) is provided on the outer edge of the opening, and the boss (7.1) is connected to the annular groove (2.1); The external dimensions of the AF housing (7) are smaller than the opening edge of the housing (2), so that the AF housing (7) can be sunk into the housing (2), and the boss (7.1) structure contacts the opening edge of the housing (2) to form a barrier.

2. A camera module with independent AF module and OIS module according to claim 1, characterized in that: Any of the bosses (7.1) is provided with a cable opening (7.2) for allowing an AF cable (9) of the AF module to pass through and be connected to a circuit in the housing (2).

3. A camera module with independent AF module and OIS module according to claim 2, characterized in that: A cable groove (2.2) communicating with the annular groove (2.1) is provided on the outer shell (2), and the AF cable (9) passes through the cable groove (2.2).

4. A camera module with independent AF module and OIS module according to any one of claims 1 to 3, characterized in that: The AF module also includes a bracket (11) and a plurality of focus actuating components (12) arranged in the AF housing (7), and the focus actuating components (12) are used to control the bracket (11) carrying the lens module (1) to move along an axis; the bracket (11) is movably connected to the AF housing (7) via an upper spring leaf (10) and a lower spring leaf (14), and a top cover (8) is provided on one side of the AF housing (7) to limit the bracket (11).

5. A camera module with independent AF module and OIS module according to claim 4, characterized in that: One side of the top cover (8) has an extension portion facing the inside of the AF housing (7), and a mounting groove (8.1) for arranging a circuit board is provided on the extension portion, and the circuit board is connected to an external circuit via an AF flat cable (9).

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