WO2021063230A1

WO2021063230A1 - Camera module, electronic apparatus, and camera module control method

Info

Publication number: WO2021063230A1
Application number: PCT/CN2020/117235
Authority: WO
Inventors: 成东村; 罗政军
Original assignee: 维沃移动通信有限公司
Priority date: 2019-09-30
Filing date: 2020-09-23
Publication date: 2021-04-08
Also published as: CN110673656A; CN110673656B

Abstract

Embodiments of the present invention disclose a camera module, an electronic apparatus, and a camera module control method. The camera module comprises a first support (100), a camera (200), a base (300), a first driving module (400), and a second driving module (500). The camera (200) and the first support (100) are rotatably connected to each other, and the first support (100) and the base (300) are rotatably connected to each other. The first driving module (400) drives, according to an angle of inclination of the camera module, the camera (200) to rotate about a first axis. The second driving module (500) drives, according to the angle of inclination, the first support (100) to rotate about a second axis. The first axis and the second axis either intersect or are non-coplanar.

Description

Camera module, electronic equipment and control method of camera module

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201910942347.0 filed in China on September 30, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present invention relates to the technical field of communication equipment, in particular to a camera module, electronic equipment and a control method of the camera module.

Background technique

With the advancement of technology, electronic devices (such as mobile phones, tablet computers) have been developed by leaps and bounds. As a powerful tool, electronic equipment greatly facilitates the life and work of users. The camera function is a basic function of an electronic device, which can meet the user's shooting needs. The camera function is usually implemented by the camera module of the electronic device.

In a specific work process, a user usually holds an electronic device to take an image. Because of the shaking during the holding process, the image quality of the image taken by the camera module may be poor.

Summary of the invention

The embodiment of the present invention discloses a camera module, an electronic device, and a control method of the camera module, so as to solve the problem that the current electronic device cannot effectively anti-shake, which in turn leads to the poor shooting quality of the electronic device.

To this end, an embodiment of the present invention discloses a camera module, which includes a first bracket, a camera, a base, a first drive module, and a second drive module, wherein:

The camera is rotatably connected with the first bracket, and the first bracket is rotatably connected with the base;

The first driving module drives the camera to rotate around a first axis according to the tilt angle of the camera module;

The second driving module drives the first bracket to rotate around a second axis according to the inclination angle, and the first axis and the second axis intersect or have different planes.

The embodiment of the present invention also discloses an electronic device including the above-mentioned camera module.

The embodiment of the present invention also discloses a control method of a camera module, the camera module is the above-mentioned camera module, and the control method includes:

Acquiring the tilt angle of the camera module;

Determining a first angular component of the inclination angle in a direction around the first axis and a second angular component in a direction around the second axis;

Controlling the first driving module to drive the camera to reversely rotate the first angle component;

The second driving module is controlled to drive the first bracket to reverse the second angle component.

The camera module disclosed in the embodiment of the present invention includes a camera that can rotate around a first axis, so that angle compensation can be performed in the direction of rotation around the first axis according to the inclination angle of the camera module, and the camera and the first bracket form a whole The angle compensation can be performed relative to the base in the direction of rotation around the second axis, and finally the angle compensation of the inclination angle of the camera module can be performed adaptively, thereby preventing the adverse effects of jitter on shooting. It can be seen that the camera module disclosed in the embodiment of the present invention can effectively stabilize the vibration through angle compensation, thereby improving the shooting quality of the camera module.

Description of the drawings

The drawings described here are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and the description thereof are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

FIG. 1 is an exploded schematic diagram of a camera module disclosed in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a camera module disclosed in an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a method for controlling a camera module disclosed in an embodiment of the present invention.

Description of reference signs:

100-first bracket, 110-first hinge axis, 120-second hinge axis,

200-camera,

300-base, 310-second hinge hole,

400-first drive module, 410-first magnet, 420-first drive coil, 430-first Hall device,

500-Second drive module, 510-Second magnet, 520-Second drive coil, 530-Second Hall device,

600-second bracket, 610-avoidance hole, 620-connection hole.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The technical solutions disclosed in the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 and FIG. 2, an embodiment of the present invention discloses a camera module, and the disclosed camera module is suitable for electronic equipment. As shown in the figure, the camera module disclosed in the embodiment of the present invention includes a first bracket 100, a camera 200, a base 300, a first driving module 400, and a second driving module 500.

The first bracket 100 is used to implement the installation of the camera 200, and the camera 200 is connected to the first bracket 100 in rotation, so that the camera 200 and the first bracket 100 can rotate relative to each other. There are many ways to realize the rotational connection between the camera 200 and the first support 100. For example, the first support 100 may be provided with a first hinge hole, the first support 100 may be provided with a first hinge shaft 110, and the first hinge shaft 110 and the first hinge shaft 110 may be provided with a first hinge hole. A hinge hole is hinged and matched, and the camera 200 can be connected to the first hinge shaft 110, so that the camera 200 and the first hinge shaft 110 rotate with respect to the first hinge hole, and finally realize the rotation connection of the camera 200 relative to the first bracket 100. Specifically, the camera 200 may be fixedly connected to the first hinge shaft 110.

In order to facilitate the installation of the camera 200, under normal circumstances, the camera module disclosed in the embodiment of the present invention may further include a second bracket 600, the camera 200 is fixedly connected to the second bracket 600, and the second bracket 600 is hinged to the first bracket 100. In turn, the second bracket 600 can drive the camera 200 to rotate relative to the first bracket 100 together. In this case, the camera 200 is connected to the first support 100 through the second support 600 in rotation.

In the same way, there are many ways to rotate the second bracket 600 and the first bracket 100. Under the premise that the camera 200 can be connected to the first bracket 100 in rotation through the cooperation of the first hinge shaft 110 and the first hinge hole, the camera 200 The second bracket 200 is fixed on the second bracket 600, and the second bracket 600 is fixedly connected to the first hinge shaft 110, so that the whole formed by the second bracket 600 and the camera 200 can rotate relative to the first bracket 100. Specifically, the second bracket 600 may be provided with a connecting hole 620, and the connecting hole 620 may be fixedly connected with the first hinge shaft 110, so as to realize the connection between the second bracket 600 and the first hinge shaft 110.

The base 300 is used to realize the installation of the first support 100, and the first support 100 is connected to the base 300 by rotation. In this case, the camera 200 can be connected to the base 300 by rotation through the first support 100, and finally can rotate relative to the base 300 .

Specifically, the first bracket 100 may be provided with a second hinge shaft 120, specifically, the first bracket 100 and the second hinge shaft 120 are fixedly connected. The base 300 may be provided with a second hinge hole 310, and the second hinge shaft 120 is hinged with the second hinge hole 310 to form a rotating pair finally. In this case, the first bracket 100 is connected to the base 300 in rotation through the cooperation of the second hinge shaft 120 and the second hinge hole 310.

The tilt angle of the camera module will generate two angular components in the plane where the camera module is located. Based on this, in the embodiment of the present invention, the first driving module 400 drives the camera 200 around the first according to the tilt angle of the camera module. The axis rotates so as to adjust the angular component in that direction around the first axis. In the case that the camera 200 is rotationally fitted with the first bracket 100 through the first hinge shaft 110, the axis of the first hinge shaft 110 is the first axis.

In the same way, the second driving module 500 drives the first bracket 100 to rotate around the second axis according to the tilt angle of the camera module, so as to adjust the angular component in the direction around the second axis. In the embodiment of the present invention, the first axis and the second axis intersect or have different planes, that is, the first axis and the second axis are intersecting straight lines or different planes. In the case that the first bracket 100 is rotationally fitted with the base 300 through the second hinge shaft 120, the axis of the second hinge shaft 120 is the second axis. In a more optional solution, the first axis is perpendicular to the second axis, which facilitates the calculation of the angle component.

In this case, under the driving action of the first driving module 400 and the second driving module 500, the camera 200 can finally achieve angle compensation in the two rotation directions, so as to compensate for the tilt angle caused by the jitter. It should be noted that the direction in which the first driving module 400 and the second driving module 500 drive the camera 200 to rotate is opposite to the direction of the corresponding angular component, so as to compensate for the tilt of the camera module.

The camera 200 included in the camera module disclosed in the embodiment of the present invention can rotate around a first axis, so that angle compensation can be performed in a direction rotating around the first axis according to the inclination angle of the camera module, and the camera 200 and the first bracket 100 The formed whole can be angularly compensated relative to the base 300 in the direction of rotation around the second axis, and finally can be adaptively compensated according to the inclination angle of the camera module, which can ultimately prevent the adverse effects of jitter on shooting. It can be seen that the camera module disclosed in the embodiment of the present invention can effectively stabilize the vibration through angle compensation, thereby improving the shooting quality of the camera module.

The camera module disclosed in the embodiment of the present invention may further include an angle detection device, and the angle detection device is used to detect the tilt angle of the camera module. Under normal circumstances, when the user is holding the electronic device for shooting, the whole electronic device shakes, which causes the camera module to shake. The camera module and the electronic device shake the whole machine. Therefore, the angle detection device detects the camera. The tilt angle of the module due to jitter can essentially detect the tilt angle of the whole electronic device. In the embodiment of the present invention, the angle detecting device may be a gyroscope, or other devices capable of detecting angles, such as a Hall angle sensor. Specifically, the angle detection device can be installed on the main board of the electronic device, or can be installed on the component parts of the camera module.

In the embodiment of the present invention, there may be multiple types of the first driving module 400, as long as the camera 200 can be driven to rotate around the first axis. Please refer to FIG. 1 again, the first driving module 400 in the embodiment of the present invention may include a first magnet 410 and a first driving coil 420. One of the first magnet and the first driving coil 420 may be disposed on the camera 200 , The other can be set on the first bracket 100. The camera 200 rotates relative to the first bracket 100 through the cooperation of the first magnet 410 and the first driving coil 420. Specifically, the first magnet 410 may be a permanent magnet or an electromagnet.

Of course, under the premise that the camera 200 is rotatably connected to the first bracket 100 through the second bracket 600, one of the first magnet 410 and the first driving coil 420 may be set on the second bracket 600, and the other may be set on the second bracket 600. One stand 100 on. In this case, the first magnet 410 or the first driving coil 420 is indirectly connected to the camera 200 through the second bracket 600. In this case, the second bracket 600 rotates relative to the first bracket 100 through the cooperation of the first magnet 410 and the first drive coil 420, so as to achieve adjustment around the first axis direction, thereby compensating for the angle caused by the inclination in this direction. Weight.

In a specific working process, the first driving coil 420 will generate a magnetic field when it is energized. The magnetic field generated when the first driving coil 420 is energized will generate a first magnetic field force with the first magnet 410, so that the camera 200 is in the first magnetic field force. Driven by, it rotates relative to the first bracket 100, and finally achieves the purpose of driving.

Specifically, the first magnet 410 can be fixed on the camera 200 or the second bracket 600, and accordingly, the first driving coil 420 can be fixed on the first bracket 100. Of course, it is also possible that the first magnet 410 is fixed on the first bracket 100, and correspondingly, the first driving coil 420 is fixed on the camera 200 or the second bracket 600.

In order to better control the rotation of the camera 200 around the first axis, in a more optional solution, the first driving module 400 in the embodiment of the present invention may further include a first Hall device 430, and a first Hall device 430. Among the first magnets 410, one is connected to the camera 200, and the other is connected to the first bracket 100. During the specific detection process, the first magnet 410 and the first Hall device 430 rotate relative to each other, and the first Hall device 430 The device 430 achieves the purpose of detecting the rotation angle according to the change of the detected magnetic field. The first Hall device 430 can detect the first angle of rotation of the camera 200. The angle component of the inclination angle of the camera module in the direction in which the camera 200 rotates around the first axis is the first angle component. When the angular components are opposite and equal, the first driving coil 420 is de-energized, so that the rotation of the camera 200 relative to the first bracket 100 is stopped.

Specifically, both the first Hall device 430 and the first driving coil 420 may be installed on the first bracket 100, and the first magnet 410 is arranged on the camera 200. In a more optional solution, the first Hall device 430 and the first drive coil 420 may be respectively arranged on both sides of the first axis, so as to improve the balance of the camera 200 on both sides of the first axis, and avoid the occurrence of heavy weight. Adverse effects.

As shown in FIG. 1, when the camera 200 is hinged with the first bracket 100 through the first hinge shaft 110, both the first magnet 410 and the camera 200 can be connected with the first hinge shaft 110. In this case, the first magnet The 410 is connected to the camera 200 through the first hinge shaft 110. Specifically, the first magnet 410 and the camera 200 may be fixed on both ends of the first hinge shaft 110 respectively.

In the same way, there may be multiple types of the second driving module 500, as long as it can drive the first support 100 to rotate around the second axis. Please refer to FIG. 1 again, the second driving module 500 in the embodiment of the present invention may include a second magnet 510 and a second driving coil 520. One of the second magnet 510 and the second driving coil 520 may be arranged in the first On the support 100, the other can be set on the base 300. The first support 100 rotates relative to the base 300 through the cooperation of the second magnet 510 and the second drive coil 520, so as to adjust the corresponding angle component around the second axis. the goal of. Specifically, the second magnet 510 may be a permanent magnet or an electromagnet.

In a specific working process, the second driving coil 520 will generate a magnetic field after being energized, and the magnetic field generated when the second driving coil 520 is energized will generate a second magnetic field force with the second magnet 510, so that the first bracket 100 and the camera 200 The formed whole rotates relative to the base 300 under the action of the second magnetic field force, and finally achieves the purpose of driving.

Specifically, the second magnet 510 can be fixed on the first bracket 100, and correspondingly, the second driving coil 520 can be fixed on the base 300. Of course, it is also possible that the second magnet 510 is fixed on the base 300, and correspondingly, the second driving coil 520 is fixed on the first bracket 100.

In order to better control the rotation of the first bracket 100 relative to the base 300, in a more optional solution, the second driving module 500 in the embodiment of the present invention may further include a second Hall device 530, and a second Hall device 530. One of the device 530 and the second magnet 510 is set on the first support 100, and the other is set on the base 300, so as to be able to follow the relative rotation between the first support 100 and the base 300. During the detection process, the second magnet 510 and the second Hall device 530 rotate relatively, and the second Hall device 530 achieves the purpose of detecting the rotation angle according to the change of the detected magnetic field. The second Hall device 530 can detect the second angle of rotation of the first bracket 100. The angular component of the inclination angle of the camera module in the direction in which the first bracket 100 rotates around the second axis is the second angular component. When the direction of the angle and the second angle component are opposite and equal, the second driving coil 520 is de-energized, so that the rotation of the first bracket 100 is stopped.

In some optional embodiments of the present invention, both the second Hall device 530 and the second driving coil 520 may be installed on the first bracket 100, and the second magnet 510 is arranged on the base 300. In a more optional solution, the second Hall device 530 and the second drive coil 520 may be respectively arranged on both sides of the second axis, so that the whole formed by the first bracket 100 and the camera 200 can be lifted to be on both sides of the second axis. The balance of power, avoiding the adverse effects caused by the emphasis.

Please refer to FIG. 1 again. In the embodiment of the present invention, the second bracket 600 may be a cover-shaped structure, and the cover-shaped structure is provided on the camera 200 to protect the camera 200. Specifically, the second bracket may be provided with an escape hole 610 so as to allow the camera 200 to partially pass through to perform shooting. Of course, the installation of the camera 200 on the second bracket 600 does not affect the rotation of the camera 200 relative to the first bracket 100. In order to facilitate the rotation of the camera 200, the top end of the camera 200 can be fixedly connected to the second bracket 600, and the bottom end of the camera 200 is suspended, thereby further reducing the probability of interference of the camera 200.

In a more optional solution, the first bracket 100 may be a frame structure, and the camera 200 may be disposed in an area surrounded by the first bracket, so as to be protected by the first bracket 100. In the same way, the base 300 may also be a frame structure, and the first bracket 100 may be arranged in the base 300 so as to be protected by the base 300. On the premise that the base 300 is a frame structure, the second magnet 510 may be fixed on the inner wall of the base 300.

The embodiment of the present invention also discloses an electronic device, which may include the above-mentioned camera module.

In some optional embodiments of the present invention, the electronic device disclosed in the embodiments of the present invention may further include a controller, which is connected to the first driving coil 420 and the second driving coil 520, and the controller can control the first driving coil 420 Power off can also control the second drive coil 520 to power off.

For more convenient control, corresponding controllers can be configured for the first drive coil 420 and the second drive coil 520 respectively. Based on this, in some optional embodiments of the present invention, the electronic device provided in the embodiments of the present invention may also include a first A controller and a second controller, the first controller is connected to the first drive coil 420, the first controller can control the first drive coil 420 to power off, the second controller is connected to the second drive coil 520, the second control The device can control the second driving coil 520 to de-energize.

Of course, the above-mentioned controller may not be limited to the control of power-off, and may also control the energization of the first driving coil 420 and the second driving coil 520.

The electronic device disclosed in the embodiment of the present invention may be, for example, a smart phone, a tablet computer, an e-book reader, a wearable device, etc., and the embodiment of the present invention does not limit the specific type of the electronic device.

The embodiment of the present invention also discloses a control method of a camera module, which is applied to an electronic device. Referring to FIG. 3, the disclosed control method includes:

S101: Obtain the tilt angle of the camera module.

The inclination angle of the electronic device can be detected by the angle detection device of the electronic device. Since the camera module is installed in the electronic device and has no relative rotation with the electronic device, the inclination angle of the camera module can be obtained by detecting the inclination angle of the electronic device. The angle of inclination can be the jitter caused by taking pictures. The angle detection device may be a sensor capable of detecting angles, such as a gyroscope and a gravity sensor in an electronic device.

S102: Determine the first angular component of the tilt angle in the direction around the first axis and the second angular component of the tilt angle in the direction around the second axis.

The coordinate system is preset in the angle detection device, with the first axis as the X axis and the second axis as the Y axis. The offset angle of the X axis and the offset angle of the Y axis are determined through the coordinate system, so as to obtain the first angle component and The second angular component. During the photographing process, the camera shake caused by holding the electronic device in the hand will cause the image to be blurred. The amount of jitter can be determined by the first angle component and the second angle component, and the tilt direction can be determined by the offset direction.

S103: Control the first driving module 400 to drive the camera 200 to reversely rotate the first angle component.

The processor of the electronic device controls the first driving module 400 to drive the camera 200 to shift in the X-axis direction. The shift of the camera 200 on the X-axis is the same as the first component of the tilt angle, and the shift direction is the same as the first component of the tilt angle. The offset direction of the tilt angle on the X axis is opposite, so as to offset the influence of jitter in the X axis direction of the electronic device.

S104: Control the second driving module 500 to drive the first bracket 100 to rotate the second angular component in the reverse direction.

The processor of the electronic device controls the second driving module 500 to drive the first bracket 100 to shift. The shift amount of the first bracket 100 on the Y axis is the same as the second component of the tilt angle, and the shift direction is the same as that of the second component of the tilt angle. The offset direction of the tilt angle on the Y axis is opposite, so as to offset the influence of jitter on the Y axis of the electronic device.

Specifically, in the above control method, the sequence of step S103 and step S104 may be partially sequential. For the corresponding implementation process of each step of the above control method, please refer to the corresponding implementation process in the above embodiment of the camera module, which will not be repeated here.

The above embodiments of the present invention focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the conciseness of the text, here is No longer.

The foregoing descriptions are merely embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

A camera module includes a first bracket (100), a camera (200), a base (300), a first drive module (400) and a second drive module (500), wherein,

The camera (200) is rotatably connected with the first bracket (100), and the first bracket (100) is rotatably connected with the base (300);

The first driving module (400) drives the camera (200) to rotate around a first axis according to the tilt angle of the camera module;

The second driving module (500) drives the first bracket (100) to rotate around a second axis according to the inclination angle, and the first axis and the second axis intersect or have different planes.
The camera module according to claim 1, wherein the first driving module (400) comprises a first magnet (410) and a first driving coil (420), and the first magnet (410) and the In the first driving coil (420), one is connected to the camera (200), the other is connected to the first bracket (100), and the camera (200) is connected to the camera (200) through the first magnet (410). The cooperation of the first driving coil (420) rotates relative to the first bracket (100).
The camera module according to claim 2, wherein the first driving module (400) further comprises a first Hall device (430), the first Hall device (430) and the first magnet In (410), one is connected to the camera (200), the other is connected to the first bracket (100), and the first Hall device (430) detects the first The angle of rotation, the angle component of the tilt angle in the direction in which the camera (200) rotates about the first axis is a first angle component, and the first angle of rotation is opposite to the direction of the first angle component. In the case of being equal, the first driving coil (420) is de-energized.
The camera module according to claim 3, wherein the first Hall device (430) and the first drive coil (420) are both installed on the first bracket (100), and are respectively arranged on On both sides of the first axis, the first magnet (410) is connected to the camera (200).
The camera module according to claim 2, wherein the first bracket (100) is provided with a first hinge hole, the first bracket (100) is provided with a first hinge shaft (110), and the first The hinge shaft (110) is hingedly matched with the first hinge hole, the axis of the first hinge shaft (110) is the first axis, and the first magnet (410) and the camera (200) are both aligned with The first hinge shaft (110) is connected.
The camera module according to claim 1, wherein the second drive module (500) comprises a second magnet (510) and a second drive coil (520), the second magnet (510) and the In the second driving coil (520), one is arranged on the first support (100), the other is arranged on the base (300), and the first support (100) passes through the second magnet (510) The cooperation with the second driving coil (520) rotates relative to the base (300).
The camera module according to claim 6, wherein the second driving module (500) further comprises a second Hall device (530), the second Hall device (530) and the second magnet In (510), one is set on the first bracket (100), the other is set on the base (300), and the second Hall device (530) detects that the first bracket (100) ), the angle component of the inclination angle in the direction in which the first bracket (100) rotates about the second axis is the second angle component, and the second angle component is between the second angle of rotation and the first angle of rotation. When the directions of the two angular components are opposite and equal, the second driving coil (520) is de-energized.
The camera module according to claim 7, wherein the second Hall device (530) and the second drive coil (520) are both installed on the first bracket (100), and are respectively arranged on On both sides of the second axis, the second magnets (510) are arranged on the base (300).
The camera module according to claim 8, wherein the base (300) is provided with a second hinge hole (310), the first bracket (100) is provided with a second hinge shaft (120), and the The axis of the second hinge shaft (120) is the second axis, and the second hinge shaft (120) is hinged with the second hinge hole (310).
The camera module according to claim 1, wherein the camera module further comprises a second bracket (600), and the camera (200) is fixedly connected to the second bracket (600), and the second bracket (600) is rotatably connected with the first bracket (100).
The camera module according to claim 10, wherein the second bracket (600) is a cover-shaped structural member, and the cover-shaped structural member is covered on the camera (200).
The camera module according to claim 1, wherein the first bracket (100) is a frame structure, and the camera (200) is arranged in an area enclosed by the first bracket (100).
The camera module according to claim 1, wherein the base (300) is a frame structure, and the first bracket (100) is arranged in an area enclosed by the base (300).
The camera module according to claim 1, wherein the camera module further comprises an angle detection device, and the angle detection device is used to detect the tilt angle of the camera module.
An electronic device comprising the camera module according to any one of claims 1-14.
A control method of a camera module, applied to an electronic device, the camera module being the camera module according to any one of claims 1-14, and the control method comprising:

Acquiring the tilt angle of the camera module;

Determining a first angular component of the inclination angle in a direction around the first axis and a second angular component in a direction around the second axis;

Controlling the first driving module (400) to drive the camera (200) to reversely rotate the first angle component;

The second driving module (500) is controlled to drive the first bracket (100) to reverse the second angle component.