CN117528204A - Video camera - Google Patents

Abstract

The present invention provides a camera, comprising: a sensor assembly; the body is used for supporting the sensor assembly, and the sensor assembly can rotate relative to the body so as to change the depth of field of the camera; the rotating tail plate comprises a rectangular substrate, a pair of side walls and a pair of rotating shafts, wherein the extending direction of the rotating shafts is perpendicular to the optical axis direction of the camera, the rotating shafts are rotatably supported on the body, and the sensor assembly is fastened to the rectangular substrate; the camera is configured to: the body is provided with a first cavity extending along the optical axis direction, and the first cavity is provided with a pair of circular arc-shaped inner surfaces corresponding to the side walls and a pair of plane-shaped inner surfaces; the outer surface of the side wall of the rotary tail plate is formed into a circular arc shape; when an external force is applied to the rotating tail plate, the rotating tail plate drives the sensor assembly to rotate relative to the body by taking the rotating shaft as an axis, and the side wall of the rotating tail plate is matched with the shape of the circular arc inner surface of the first cavity of the body, so that the outer surface of the side wall is always abutted against the circular arc inner surface of the first cavity in a rotating state.

Description

Video camera

Technical Field

The invention relates to the field of electronic equipment, in particular to a camera.

Background

Video cameras, also known as computer cameras, computer eyes, electronic eyes, etc., are video input devices, and are widely used in video conferences, telemedicine, real-time monitoring, etc. The user can talk and communicate with each other through the video camera and the audio camera on the network. In addition, people can also use the video processing device for various popular digital images, video processing and the like.

At present, a camera and a monitoring material generally form a certain angle, and the depth of field range is limited, so that the image sensor can rotate to increase the depth of field range, and the image performance is improved. However, during rotation of the sensor, the rotational play in the structure that is present to effect rotation tends to cause dust, light to enter the sensor assembly, thereby affecting the imaging performance of the sensor.

Disclosure of Invention

In order to solve the technical problems, the invention provides a camera, wherein a rotating tail plate provided with a sensor assembly is rotatably supported on a body through a rotating shaft, and the side wall of the rotating tail plate and the body are provided with arc-shaped surfaces with shape adaptation, so that the side wall of the rotating tail plate is always abutted against the inner surface of the body in a rotating state, and dust and light are prevented from entering the body.

In one embodiment of the present invention, there is provided a camera including:

a sensor assembly;

a body supporting the sensor assembly such that the sensor assembly is rotatable relative to the body to thereby vary the depth of field of the camera;

a rotation tail plate including a rectangular base plate, side walls provided on both sides of a pair of long sides of the rectangular base plate, and rotation shafts provided on both sides of a pair of short sides of the rectangular base plate, wherein an extending direction of the rotation shafts is perpendicular to an optical axis direction of the camera, and the rotation shafts are rotatably supported to the body, the sensor assembly being fastened to the rectangular base plate;

the camera is configured to:

the body has a first cavity extending along the optical axis direction, the first cavity having a pair of circular arc-shaped inner surfaces corresponding to the side walls and a pair of planar inner surfaces corresponding to the short sides in the optical axis direction;

the outer surface of the side wall of the rotary tail plate is formed into an arc shape;

when external force is applied to the rotating tail plate, the rotating tail plate takes the rotating shaft as an axis to drive the sensor assembly to rotate relative to the body, and the side wall of the rotating tail plate is matched with the arc-shaped inner surface of the first cavity of the body in shape, so that the outer surface of the side wall is always abutted to the arc-shaped inner surface of the first cavity in a rotating state.

In one embodiment, the first height of the side wall in the optical axis direction and the length of the short side of the rectangular substrate define a rotation angle range of the sensor assembly, thereby defining a depth of field range of the camera.

In one embodiment, the first cavity has an inner wall perpendicular to the optical axis of the camera, the inner wall being spaced apart from the rotating tailboard,

a shielding rib extending from the inner wall towards the rotating tail plate along the optical axis direction of the camera is arranged in the first cavity, and the shielding rib surrounds the sensor assembly;

the side wall of the rotary tail plate extends into the space between the shielding rib and the circular arc-shaped inner surface.

In one embodiment, a first distance is provided between the inner wall and the rotational axis,

the first distance is configured to be larger than the first height, so that the rotating tail plate drives the sensor assembly to rotate relative to the body by taking the rotating shaft as an axis; and is also provided with

The second height of the shielding ribs is configured to be greater than a difference between the first spacing and the first height such that the shielding ribs enclose a projected area forming the sensor assembly.

In one embodiment, the rotary tail plate comprises a sealing ring, and the sealing ring is hermetically sealed in a rotary gap between the rotary tail plate and the body;

wherein, the sealing washer includes at least:

the first sealing ring is arranged in a first mounting groove surrounding the periphery of the rectangular substrate, the first sealing ring has a circular cross section, and the diameter of the first sealing ring is larger than that of the first mounting groove;

the second sealing strips are arranged in corresponding second mounting grooves on the outer surface of the side wall, the second sealing strips have circular cross sections, and the diameter of the second sealing strips is larger than that of the second mounting grooves;

when a plurality of second sealing strips are included, a plurality of second mounting grooves are arranged at intervals along the direction of the first height.

In one embodiment, the device comprises a face seal, wherein the face seal is arranged on the inner surface of the rotating tail plate or the first cavity so as to be filled in a rotating gap between the rotating tail plate and the body in a sealing way;

wherein the face seal comprises:

a pair of first face seals, the first face seals are in one-to-one correspondence with the side walls, one side surface of the first face seal is attached to the side walls or the circular arc-shaped inner surface, so that the other side surface of the first face seal is in sliding contact with the circular arc-shaped inner surface or the side walls; and

and the second surface sealing pieces are in one-to-one correspondence with the pair of short sides of the rectangular substrate, and one side surface of each second surface sealing piece is attached to the short side or the planar inner surface so that the other side surface of each second surface sealing piece is in sliding contact with the planar inner surface or the short side.

In one embodiment, the rotating tail plate comprises a rotating plate, wherein the rotating plate is arranged on one side surface of the rectangular base plate, which is far away from the first cavity, and protrudes out of the rectangular base plate from one long side of the rectangular base plate in an extension plane of the rectangular base plate, and the rotating plate is adjacent to one end corner of the rectangular base plate;

the camera comprises a motor driving mechanism, the motor driving mechanism is arranged on the body and is located outside the first cavity, and the motor driving mechanism applies external force along the optical axis direction to the rotating plate so as to drive the rotating tail plate to drive the sensor assembly to rotate relative to the body by taking the rotating shaft as an axis.

In one embodiment, the motor drive mechanism includes:

the motor is arranged on the body;

a guide shaft and an output shaft, each extending in the optical axis direction and arranged at intervals in the body in the direction of the short side;

the pressing plate is penetrated through the guide shaft and the output shaft at the same time, is limited to extend along the direction of the short side and translate along the direction of the optical axis, and the front end of the pressing plate is propped against the rotating plate;

the motor outputs rotary power around the axial direction of the motor through the output shaft, the output shaft is in threaded fit with the pressing plate, the guide shaft is in interference fit with the pressing plate, and the pressing plate is limited to translate along the optical axis direction through the limit of the guide shaft under the rotary driving of the output shaft so as to apply external force along the optical axis direction to the rotating plate.

In one embodiment, the guide shaft is located closer to the rotating tailboard than the output shaft, and the output shaft is threadedly engaged with the rear end of the pressure plate;

the length of the rotating plate is larger than the distance between the guide shaft and the rotating tail plate, and the end part of the rotating plate is provided with a fork part avoiding the guide shaft;

the motor driving mechanism comprises a reset spring, the reset spring is sleeved on the guide shaft, the reset spring and the pressing plate are respectively positioned at two sides of the rotating plate, and the reset spring and the pressing plate respectively apply external forces with opposite directions to the rotating plate along the guide shaft;

the initial length of the return spring corresponds to an upper limit position of the rotating plate furthest from the first cavity.

In one embodiment, the top edge of the circular arc-shaped inner surface has a recess recessed into the first cavity, the recess corresponding to the position of the rotating plate, the recess depth of the recess being configured to avoid the lower extreme position of the rotating plate furthest into the first cavity.

In one embodiment, the motor has a motor output shaft offset from the platen, the motor output shaft extending in the optical axis direction, the motor output shaft driving the output shaft to rotate axially through a synchronous transmission mechanism.

In one embodiment, the sensor assembly is mounted to the rectangular substrate from a side of the rectangular substrate facing away from the first cavity, the sensor assembly comprising a substrate protruding from the rectangular substrate,

the camera comprises a heat radiation module, the heat radiation module comprises a heat radiation substrate and a pair of heat radiation supporting walls for supporting the heat radiation substrate on the substrate, and the heat radiation substrate and the heat radiation supporting walls form a heat radiation space surrounding the substrate from the outside of the first cavity.

As is clear from the above, in the present embodiment, the rotating tailboard 30 has the rectangular base plate 31 for mounting the sensor assembly 10, and the rotating shaft 33 of the rotating tailboard 30 is disposed on the pair of short sides of the rectangular base plate 31 according to the conventional arrangement of the camera, so that a rotating gap is formed between the pair of long sides of the rectangular base plate 31 and the first cavity 21. In the present embodiment, a pair of long sides of the rectangular substrate 31 have side walls 32 extending toward the inside of the first cavity 21, wherein the side walls 32 form an outer surface of a circular arc shape. Correspondingly, the first cavity 21 also has a circular arc-shaped inner surface 21a corresponding in position and shape to the side wall 32. The side wall 32 and the circular arc-shaped inner surface 21a are formed as concentric circles with a rotation axis 33 as the center. Thus, in the rotated state of the rotating tail plate 30, the side wall 32 and the circular arc-shaped inner surface 21a can be kept in a state where the pitch is constant at all times. Further, by setting the gap between the side wall 32 and the circular arc-shaped inner surface 21a, that is, by setting the radius of the side wall 32 and the circular arc-shaped inner surface 21a, it is possible to not only satisfy the requirement of the rotational degree of freedom of the rotary tail plate 30, but also prevent dust, light, etc. from entering the inside of the first cavity 21 through the rotational gap.

Drawings

The following drawings are only illustrative of the invention and do not limit the scope of the invention.

Fig. 1 is a schematic structural view of a video camera of the present invention.

Fig. 2 is a partial schematic view of the camera of the present invention.

Fig. 3 is a partial cross-sectional view of the body of the camera of the present invention.

Fig. 4a to 4b are schematic structural views of a rotary tail plate in the video camera of the present invention.

Fig. 5 is an assembled schematic view of a rotary tail plate in the camera of the present invention.

Fig. 6 is a partial schematic view of the body of the camera of the present invention.

Fig. 7a to 7b are schematic structural views of a seal of a rotary tail plate in a camera according to the present invention.

Fig. 8 is an assembled schematic view of the seal of the rotary tail plate in the camera of the present invention.

Fig. 9 is an assembled schematic view of the face seal in the camera of the present invention.

Fig. 10 is a cross-sectional view of the camera of the present invention.

Fig. 11 is an enlarged partial schematic view of fig. 10.

Fig. 12 and 13 are schematic structural views of the extreme positions of the pivotal tail plate in the video camera of the present invention.

Fig. 14 is a partial schematic view of a motor drive mechanism in the video camera of the present invention.

Detailed Description

For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to like parts throughout the various views.

In this document, "schematic" means "serving as an example, instance, or illustration," and any illustrations, embodiments described herein as "schematic" should not be construed as a more preferred or advantageous solution.

For simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the drawings, and do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used merely to indicate relative positional relationships between the relevant portions, and do not limit the absolute positions of the relevant portions.

Herein, "first", "second", etc. are used only for distinguishing one another, and do not denote any order or importance, but rather denote a prerequisite of presence.

Herein, "equal," "same," etc. are not strictly mathematical and/or geometric limitations, but also include deviations that may be appreciated by those skilled in the art and allowed by fabrication or use, etc. Unless otherwise indicated, numerical ranges herein include not only the entire range within both of its endpoints, but also the several sub-ranges contained therein.

Example embodiments will now be described more fully with reference to the accompanying drawings.

In order to solve the problems in the prior art, the invention provides a camera, wherein a rotating tail plate provided with a sensor assembly is rotatably supported on a body through a rotating shaft, and the side wall of the rotating tail plate and the body are provided with arc-shaped surfaces with shape adaptation, so that the side wall of the rotating tail plate is always abutted against the inner surface of the body in a rotating state, and dust and light are prevented from entering the body.

As shown in fig. 1 to 6, one embodiment of the present invention provides a camera including:

a sensor assembly 10;

the body 20, the body 20 supports the sensor assembly 10, so that the sensor assembly 10 can rotate relative to the body 20, and further the depth of field of the camera is changed;

a turning tail plate 30, the turning tail plate 30 including a rectangular base plate 31, side walls 32 provided on both sides of a pair of long sides of the rectangular base plate 31, and turning shafts 33 provided on both sides of a pair of short sides of the rectangular base plate 31, wherein an extending direction of the turning shafts 33 is perpendicular to an optical axis direction of the camera, and the turning shafts 33 are rotatably supported to the body 20, the sensor assembly 10 being fastened to the rectangular base plate 31;

the camera is configured to:

the body 20 has a first cavity 21 extending in the optical axis direction, the first cavity 21 having a pair of circular arc-shaped inner surfaces 21a corresponding to the side walls 32 and a pair of plane-shaped inner surfaces 21b corresponding to the short sides in the optical axis direction;

the outer surface of the side wall 32 of the rotary tail plate 30 is formed in a circular arc shape;

when an external force is applied to the rotating tail plate 30, the rotating tail plate 30 drives the sensor assembly 10 to rotate relative to the body 20 by taking the rotating shaft 33 as an axis, and the side wall 32 of the rotating tail plate 30 is in shape fit with the circular arc-shaped inner surface 21a of the first cavity 21 of the body 20, so that the outer surface of the side wall 32 is always abutted against the circular arc-shaped inner surface 21a of the first cavity 21 in the rotating state.

As shown in fig. 1 to 3, in the present embodiment, the video camera may include a lens assembly 1 at a front end, a lens rear case 2 at the front end for mounting the lens assembly 1, wherein a body 20 may be formed at a rear end of the lens rear case 2. The lens assembly 1 and the body 20 both extend along the optical axis direction.

The body 20 has a hollow first cavity 21, and a projection area of the sensor assembly 10 is formed in the first cavity 21. The side of the first cavity 21 facing away from the lens assembly 1 has an opening perpendicular to the optical axis direction, the rotating tail plate 30 is rotatably supported on the body 20, which closes the opening of the first cavity 21, and the sensor assembly 10 is mounted thereon to rotatably support the sensor assembly 10 on the body 20. The sensor assembly 10 is also arranged in the optical axis direction, and the distance between the sensor assembly 10 and the lens assembly 1 can be changed by rotating the tail plate 30, so that the purpose of changing the depth of field of the camera is realized by changing the focal length.

In the rotation state of the rotation tail plate, the rotation tail plate is a rotation piece, the body and the first cavity are fixing pieces, when the rotation tail plate rotates relative to the body, in order to provide the degree of freedom of rotation, a rotation gap is necessarily required to be arranged between the edge of the rotation tail plate and the first cavity, and when the edge of the rotation tail plate and the inner surface of the first cavity are of linear structures, the rotation gap cannot be kept constant, but the distance is changed along with the change of the rotation angle. The rotary gap cannot be filled with a sealing member capable of preventing dust and light from entering, nor can the rotary gap be eliminated.

In the present embodiment, the rotary tail plate 30 has a rectangular base plate 31 for mounting the sensor assembly 10, and the rotary shaft 33 of the rotary tail plate 30 is disposed at a pair of short sides of the rectangular base plate 31 according to the conventional arrangement of the camera, so that a rotary gap is formed between a pair of long sides of the rectangular base plate 31 and the first cavity 21. In the present embodiment, a pair of long sides of the rectangular substrate 31 have side walls 32 extending toward the inside of the first cavity 21, wherein the side walls 32 form an outer surface of a circular arc shape. Correspondingly, the first cavity 21 also has a circular arc-shaped inner surface 21a corresponding in position and shape to the side wall 32. The side wall 32 and the circular arc-shaped inner surface 21a are formed as concentric circles with a rotation axis 33 as the center. Thus, in the rotated state of the rotating tail plate 30, the side wall 32 and the circular arc-shaped inner surface 21a can be kept in a state where the pitch is constant at all times. Further, by setting the gap between the side wall 32 and the circular arc-shaped inner surface 21a, that is, by setting the radius of the side wall 32 and the circular arc-shaped inner surface 21a, it is possible to not only satisfy the requirement of the rotational degree of freedom of the rotary tail plate 30, but also prevent dust, light, etc. from entering the inside of the first cavity 21 through the rotational gap.

The first cavity 21 has a pair of circular arc-shaped inner surfaces 21a corresponding to the side walls 32 and a pair of plane-shaped inner surfaces 21b corresponding to the short sides, and the plane-shaped inner surfaces 21b are provided with a pair of receiving holes to rotatably receive the ends of the rotation shaft 33. In one example, the first cavity 21 may have a pair of circular arc-shaped inner surfaces 21a corresponding to the side walls 32, and a pair of vertical inner surfaces 21c connected between the circular arc-shaped inner surfaces 21a and the opening of the first cavity 21, wherein the height of the vertical inner surfaces 21c corresponds to the diameter of the receiving hole. The circular arc-shaped inner surface 21a is tangent to the vertical inner surface 21c at the junction.

In one embodiment, the first height H of the side wall 32 in the optical axis direction, and the length L of the short side of the rectangular substrate 31 define the rotation angle range of the sensor assembly 10, and thus the depth of field range of the camera.

As can be seen from fig. 3, the radius of rotation of the side wall 32 is half the length of the short side of the rectangular substrate 31, and the first height H of the side wall 32 in the optical axis direction determines the arc length of the rotatable range of the turning tail plate 30, whereby the range of the rotatable angle of the turning tail plate 30, and thus the range of the rotational angle of the sensor assembly 10, and thus the depth of field of the camera can be defined via these two parameters.

Wherein, the length of the short side of the rotating tail plate is controlled to be about l=25 mm, and the rotating angle α= ±10°, the first height H of the side wall 32 is greater than l×tan α.

Specifically, as shown in fig. 2, the first cavity 21 has an inner wall 22 perpendicular to the optical axis direction of the camera, the inner wall 22 being spaced apart from the rotary tail plate 30, a center of the inner wall 22 being formed in a light passing hole through which the lens assembly 1 passes, and the sensor assembly 10 being projected through the light passing hole.

The first chamber 21 includes therein a shielding rib 23 extending from the inner wall 22 toward the rotary tail plate 30 in the optical axis direction of the camera, the shielding rib 23 surrounding the sensor assembly 10;

wherein the side wall 32 of the turning tail plate 30 extends between the shielding rib 23 and the circular arc-shaped inner surface 21a.

The shielding ribs 23 enclose the inner wall 22 to form a box shape with an opening towards the turning tail plate to enclose the box-shaped interior to form a projection area for the sensor assembly 10. Wherein the shielding ribs 23 may be combined with the side walls 32 of the rotating tailboard 30 to form a protective structure for preventing external light from entering the projection area of the sensor assembly 10. Therefore, the side wall 32 extends between the shielding rib 23 and the circular arc-shaped inner surface 21a, and the shielding rib 23 extends from the inner wall 22 toward the rotating tail plate 30, while the side wall 32 extends from the rotating tail plate 30 toward the inner wall 22, and the protection structure forms a meandering curve structure around the sensor assembly 10, so that light blocking and dust preventing effects can be effectively formed.

In one embodiment, the inner wall 22 has a first spacing H1 from the rotational axis 33;

wherein the first distance H1 is configured to be greater than the first height H, so that the rotating tailboard 30 rotates the sensor assembly 10 relative to the body 20 with the rotating shaft 33 as an axis; and is also provided with

The second height H of the shielding ribs 23 is configured to be greater than the difference between the first spacing H1 and the first height H such that the shielding ribs 34 enclose a projected area forming the sensor assembly 10.

The difference between the first distance H1 and the first height H of the side wall 32 is the space range inside the first cavity 21 for the rotation of the rotating tail plate 30, and when the second height H of the shielding rib 23 is greater than the difference between the first distance H1 and the first height H, the shielding rib 23 can play a role in preventing light or dust entering the first cavity from the rotation gap between the rotating tail plate 30 and the first cavity from entering the projection area formed inside the shielding rib 23 for the sensor assembly 10.

As described above, there must be a rotational gap between the rotational tail plate 30 and the first cavity, and in one embodiment, the rotational tail plate 30 includes a seal ring 34, and the seal ring 34 is sealingly installed in the rotational gap between the rotational tail plate 30 and the body 20, thereby maintaining the sidewall 32 of the rotational tail plate 30 always in abutment with the circular arc-shaped inner surface 21a while guaranteeing the rotational degree of freedom of the rotational tail plate 30, thereby minimizing the influence of the rotational gap on the imaging effect of the sensor assembly 10.

Wherein the seal ring 34 comprises at least:

the first sealing ring 341 is arranged in the first mounting groove 311 surrounding the periphery of the rectangular substrate 31, the first sealing ring 341 has a circular cross section, and the diameter of the first sealing ring 341 is larger than that of the first mounting groove 311;

one or more second sealing strips 342, the second sealing strips 342 being mounted in corresponding second mounting grooves 321 on the outer surface of the side wall 32, the second sealing strips 342 having a circular cross section, and the diameter of the second sealing strips 342 being larger than the diameter of the second mounting grooves 321;

when the plurality of second sealing bars 342 are included, the plurality of second mounting grooves 321 are disposed at intervals along the direction of the first height H.

The rotation gap includes two portions, one being a gap between the pair of side walls 32 and the circular arc-shaped inner surface 21a and one being a gap between the pair of short sides of the rectangular base plate 31 and the planar inner surface 21 b.

In the present embodiment, the first seal ring 341 is used to fill the above two gaps at the same time, and the second seal 342 is used to fill the gap between the pair of side walls 32 and the circular arc-shaped inner surface 21a. The diameter of the first sealing ring 341 may be adapted to the thickness of the rectangular substrate 31, and the first mounting groove 311 may encircle the entire periphery of the rectangular substrate 32, and only avoid the position of the rotation shaft 33.

Based on the thickness of the rectangular substrate 31, the gap between the pair of short sides of the rectangular substrate 31 and the planar inner surface 21b can be regarded as a linear gap, and the gap between the pair of side walls 32 and the circular arc-shaped inner surface 21a can be regarded as a planar gap. Accordingly, one or more second sealing bars 342 may be provided based on the first height H of the sidewall 32 to improve sealing effect.

The first sealing ring and the second sealing strip can both form a flexible material with a circular section, the sealing element is made of a flexible material with a smooth surface, the material is preferably TPU (thermoplastic polyurethane elastomer rubber) or silica gel, and the like, and the compression of the sealing element is controlled to be 10-15% in the actual movement process.

In another embodiment, a face seal 35 is included, the face seal 35 being provided to the inner surface of the rotating tailboard 30 or the first cavity 21 to seal and fill in the rotating gap between the rotating tailboard 30 and the body 20;

wherein the face seal 35 comprises:

a pair of first face seals 351, the first face seals 351 being in one-to-one correspondence with the side walls 32, one side surface of the first face seal 351 being adhered to the side wall 32 or the circular arc-shaped inner surface 21a so that the other side surface of the first face seal 351 is in sliding contact with the circular arc-shaped inner surface 21a or the side wall 32; and

and a pair of second face seals 352, the second face seals 352 being in one-to-one correspondence with a pair of short sides of the rectangular substrate 31, one side surface of the second face seal 352 being bonded to the short side or the planar inner surface 21b such that the other side surface of the second face seal 352 is in sliding contact with the planar inner surface 21b or the short side.

The face seal 35 is formed as a contoured seal that can be fitted to the surface of the rotating tailboard to form a sliding contact with the inner surface of the first cavity 21; or it may be fitted to the inner surface of the first cavity 21 to make sliding contact with the surface of the rotating tailboard. The sealing element is made of flexible materials with smooth surfaces, the materials are preferably TPU or silica gel, the thickness h1 is less than or equal to 2mm, and the compression amount of the sealing element is controlled to be 10-15% in the actual movement process.

In one embodiment, the rotary tail plate 30 includes a rotary plate 36, the rotary plate 36 is mounted on a side surface of the rectangular substrate 31 facing away from the first cavity 21, and protrudes from one long side of the rectangular substrate 31 in an extension plane of the rectangular substrate 31, wherein the rotary plate 36 is adjacent to one end corner of the rectangular substrate 31;

the camera comprises a motor driving mechanism, wherein the motor driving mechanism is arranged on the body 20 and is positioned outside the first cavity 21, and the motor driving mechanism applies an external force along the optical axis direction to the rotating plate 36 so as to drive the rotating tail plate 30 to rotate relative to the body 20 by taking the rotating shaft 33 as an axis.

In the present embodiment, in order to reduce the volume of the motor driving mechanism and to achieve precise control of the rotation angle of the sensor assembly 10, the rotation of the rotation tail plate is driven in a linear driving mode instead of adopting a rotation driving mode for the rotation tail plate. In which a rotating plate 36 extending beyond the rectangular base plate 31 is provided in the rotating tail plate 3, and the length of the arm of force of the acting force is extended by applying an external force to the rotating plate 36, thereby reducing the requirement for the output power of the motor. And by extending the arm length, the control accuracy of the turning angle of the turning tail plate can be improved, and the unit turning angle of the turning tail plate corresponding to the unit moving length of the end portion of the turning plate 36 can be reduced.

The rotating plate 36 is adjacent to one end corner of the rectangular base plate 31, whereby the motor drive mechanism can be provided also at the end corner of the body 20.

Specifically, the motor drive mechanism includes:

a motor 41, the motor 41 being mounted on the body 20;

a guide shaft 42 and an output shaft 43, the guide shaft 42 and the output shaft 43 extending in the optical axis direction and being arranged at intervals in the body 20 in the direction of the short side;

a pressing plate 44, the pressing plate 44 being provided to penetrate through the guide shaft 42 and the output shaft 43 at the same time so as to be limited to extend in the direction of the short side and translate in the optical axis direction, the front end of the pressing plate pressing against the rotating plate 36;

wherein, the motor 41 outputs a rotation power around its axial direction via the output shaft 43, the output shaft 43 is screw-fitted with the pressing plate 44, the guide shaft 42 is interference-fitted with the pressing plate 44, and the pressing plate 44 is limited to translate along the optical axis direction via the limit of the guide shaft 42 under the rotation drive of the output shaft 43 to apply an external force along the optical axis direction to the rotating plate 36.

In the present embodiment, the motor output shaft of the motor 41, the guide shaft 42, and the output shaft 43 may all extend in the optical axis direction, wherein the motor output shaft and the output shaft 43 are movement shafts that rotate around the axis direction, and the guide shaft 42 is a fixed shaft that provides the guide and limit functions. The motor 41 outputs rotational power rotating in the optical axis direction via a motor output shaft, which may be synchronously transmitted to the output shaft 43 via, for example, a synchronizing mechanism or a reversing gear set, etc., so that the output shaft 43 provides rotational power to the platen 44 in the same manner as the output shaft 43 rotates in the optical axis direction.

As shown in fig. 14, the motor 41 has a motor output shaft 411 offset from the platen 44, the motor output shaft 411 extending in the optical axis direction, and the motor output shaft 411 driving the output shaft 43 to axially rotate through a synchronous transmission mechanism 412. In fig. 11-14, the synchronous drive 412 is shown as a reversing gear set that may include a plurality of gears that are engaged in a stepwise manner that both provides a reduced output of the motor and changes the direction of output of the rotational power depending on the number of gears.

The pressing plate 44 has two through holes penetrating in the thickness direction (optical axis direction) to be engaged with the guide shaft 42 and the output shaft 43, respectively. The pressing plate 44 and the guide shaft 42 are in an interference fit manner, that is, the pressing plate 44 is sleeved on the guide shaft 42 with a through hole with a diameter larger than that of the guide shaft 42, and the pressing plate 44 can move along the guide shaft 42 under the guiding action of the guide shaft 42. The pressing plate 44 is in threaded engagement with the output shaft 43, i.e. the surface of the output shaft 43 is provided with external threads, and the pressing plate 44 is in threaded engagement with the output shaft 43 through a threaded hole provided with corresponding internal threads. When the output shaft 43 is rotated by the motor 41, the pressing plate 44 cannot be rotated synchronously with the output shaft 43 by the friction force due to the limit action of the guide shaft 42, but is limited to extend in the direction of the short side by the guide shaft 42 and the output shaft 43, and the pressing plate 44 can reciprocate relative to the output shaft 43 in the extending direction of the output shaft 43 by the screw-fit of the pressing plate 44 and the output shaft 43, wherein the moving direction of the pressing plate 44 is related to the rotating direction of the output shaft 43. The pressing plate 44, the output shaft 43 and the guide shaft 42 form a movement similar to a screw nut, and the rotation power output by the output shaft 43 causes the pressing plate 44 to form a linear movement along the extending direction of the output shaft 43.

In order to enable the motor drive, in particular the motor 41, to avoid the movement of the pressure plate 44 and the rotary tail plate, it is preferred that the guide shaft 42 is located closer to the rotary tail plate 30 than the output shaft 43, and that the output shaft 43 is screw-fitted with the rear end of the pressure plate 44. The front end of the pressing plate 44 is engaged with the rotating plate 36, the middle portion is limited by the guide shaft 42 and is maintained in the short side direction, and the rear end is screw-engaged with the output shaft 43.

In order to expand the length of the arm of force inputted by the external force of the pivotal tail plate 30, the length of the pivotal plate 36 is longer than the distance between the guide shaft 42 and the pivotal tail plate 30, and the end of the pivotal plate 36 has a fork 361 that avoids the guide shaft 42. The fork 361 accommodates the guide shaft 42 in the split.

The motor driving mechanism comprises a return spring 45, the return spring 45 is sleeved on the guide shaft 42, the return spring 45 and the pressing plate 44 are respectively positioned on two sides of the rotating plate 36, and the return spring 45 and the pressing plate 44 respectively apply external forces with opposite directions to the rotating plate 36 along the guide shaft 42.

As shown in fig. 10, the return spring 45 is located at one side of the rotation plate 36 in the optical axis direction, and the pressing plate 44 is located at the other side of the rotation portion 36, whereby the rotation plate 36 changes the moving direction and position according to the magnitude of the external force provided by the return spring 45 and the pressing plate 44.

The return spring 45 functions to provide the rotating plate 36 with a return force in a direction opposite to the external force provided by the pressing plate 44, which provides the rotating plate 36 with a moving power in a direction opposite to the pressing plate, and is capable of maintaining the pressing plate 44 in a translational state perpendicular to the optical axis direction.

For example, when the rotating plate 36 is caused to move downward as shown in fig. 12 to drive the rotating tailplate 30 to rotate in the clockwise direction in the drawing, the output shaft 43 rotates in the left-to-right direction in the drawing, and the pressing plate 44 moves downward to provide downward pressure to the rotating plate 36, and the downward pressure is greater than the upward elastic force provided by the return spring 45. When the rotating plate 36 is moved upward as shown in fig. 13 to drive the rotating tailplate 30 to rotate in the counterclockwise direction in the drawing, the output shaft 43 rotates in the right-to-left direction in the drawing, the pressing plate 44 moves upward, which cancels the downward pressure provided to the rotating plate 36, and the pressing plate 33 moves upward under the upward elastic force provided by the return spring 45.

Wherein the initial length of the return spring 45 corresponds to the upper limit position of the rotation plate 36 farthest from the first cavity 21 to satisfy the rotation angle range of the rotation plate 36.

Wherein the top edge of the circular arc-shaped inner surface 21a is provided with a groove 24 recessed toward the inside of the first cavity 21, the groove 24 corresponds to the position of the rotating plate 36, and the recessed depth of the groove 24 is configured to avoid the lower limit position of the rotating plate 36 which is deepest into the inside of the first cavity 21.

As shown in fig. 11, the sensor assembly 10 is mounted to the rectangular substrate 31 from a side of the rectangular substrate 31 facing away from the first cavity 21, the sensor assembly 10 includes a substrate 11 protruding from the rectangular substrate 31,

the camera includes a heat radiation module 50, the heat radiation module 50 includes a heat radiation substrate 51 and a pair of heat radiation support walls 52 supporting the heat radiation substrate 51 to the substrate 11, the heat radiation substrate 51 and the heat radiation support walls 52 forming a heat radiation space surrounding the substrate 11 from outside the first cavity 21.

In the present embodiment, the center of the rectangular substrate 31 has a via hole through which the sensor assembly 10 passes, and the sensor assembly 10 is mounted on the rectangular substrate 31 from a side of the rectangular substrate 31 facing away from the first cavity 21, so that the substrate 11 protrudes from the rectangular substrate 31 in the optical axis direction and is located outside the first cavity 21. The substrate 11 may be implemented as a printed circuit board of the sensor assembly 10, on which the primary heat generating components of the sensor assembly 10 may be included. In this embodiment, the heating element of the sensor assembly 10 is disposed outside the first cavity 21, so as to avoid unsmooth heat dissipation of the sensor assembly 10 caused by a closed environment, and further affect the imaging effect of the sensor assembly.

In this example, a heat dissipation module 50 dedicated to the substrate 11 of the sensor assembly 10 may be provided. The heat dissipation module 50 is clamped at the edge of the substrate 11, but not the rectangular substrate 31, so as to avoid affecting the gap between the rotating tail plate 30 and the first cavity. The heat dissipation module forms a heat dissipation space surrounding the substrate 11 from the outside of the first cavity 21, which not only can protect the substrate 11, but also can improve the heat dissipation efficiency of the substrate 11.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, without departing from the technical spirit of the present invention are included in the scope of the present invention.

Claims (10)

1. A video camera, comprising:

a sensor assembly (10);

-a body (20), the body (20) supporting the sensor assembly (10) such that the sensor assembly (10) is rotatable relative to the body (20) to vary the depth of field of the camera;

a turning tail plate (30), the turning tail plate (30) comprising a rectangular base plate (31), side walls (32) provided on both sides of a pair of long sides of the rectangular base plate (31), and turning shafts (33) provided on both sides of a pair of short sides of the rectangular base plate (31), wherein an extending direction of the turning shafts (33) is perpendicular to an optical axis direction of the camera, and the turning shafts (33) are rotatably supported to the body (20), the sensor assembly (10) being fastened to the rectangular base plate (31);

the camera is configured to:

the body (20) has a first cavity (21) extending along the optical axis direction, the first cavity (21) having a pair of circular arc-shaped inner surfaces (21 a) corresponding to the side walls (32) and a pair of planar inner surfaces (21 b) corresponding to the short sides in the optical axis direction;

the outer surface of the side wall (32) of the rotary tail plate (30) is formed into a circular arc shape;

when an external force is applied to the rotating tail plate (30), the rotating tail plate (30) drives the sensor assembly (10) to rotate relative to the body (20) by taking the rotating shaft (33) as an axis, and the side wall (32) of the rotating tail plate (30) is matched with the arc-shaped inner surface (21 a) of the first cavity (21) of the body (20) in shape, so that the outer surface of the side wall (32) is always abutted against the arc-shaped inner surface (21 a) of the first cavity (21) in a rotating state.

2. Camera according to claim 1, characterized in that the first height (H) of the side wall (32) in the optical axis direction and the length of the short side of the rectangular substrate (31) define the range of angles of rotation of the sensor assembly (10) and thus the range of depth of field of the camera.

3. The camera according to claim 2, wherein the first cavity (21) has an inner wall (22) perpendicular to the optical axis direction of the camera, the inner wall (22) being spaced opposite the rotary tail plate (30),

-a shielding rib (23) extending from the inner wall (22) in the direction of the optical axis of the camera towards the rotating tailboard (30) is comprised in the first cavity (21), the shielding rib (23) surrounding the sensor assembly (10);

the side wall (32) of the rotary tail plate (30) extends into the space between the shielding rib (23) and the circular arc-shaped inner surface (21 a).

4. A camera according to claim 3, characterized in that the inner wall (22) and the rotation axis (33) have a first distance (H1) therebetween,

wherein the first pitch (H1) is configured to be greater than the first height (H) such that the rotating tailboard (30) rotates the sensor assembly (10) relative to the body (20) about the rotational axis (33); and is also provided with

The second height (H) of the shielding ribs (23) is configured to be greater than a difference between the first spacing (H1) and the first height (H) such that the shielding ribs (34) enclose a projection area forming the sensor assembly (10).

5. The camera according to claim 2, wherein the rotary tail plate (30) comprises a sealing ring (34), the sealing ring (34) being sealingly arranged in a rotary gap between the rotary tail plate (30) and the body (20);

wherein the sealing ring (34) at least comprises:

a first seal ring (341), wherein the first seal ring (341) is arranged in a first mounting groove (311) surrounding the periphery of the rectangular substrate (31), the first seal ring (341) has a circular cross section, and the diameter of the first seal ring (341) is larger than that of the first mounting groove (311);

one or more second sealing strips (342), wherein the second sealing strips (342) are arranged in corresponding second mounting grooves (321) on the outer surface of the side wall (32), the second sealing strips (342) have circular cross sections, and the diameter of the second sealing strips (342) is larger than that of the second mounting grooves (321);

when a plurality of second sealing strips (342) are included, a plurality of second mounting grooves (321) are arranged at intervals along the direction of the first height (H).

6. The camera according to claim 2, comprising a face seal (35), said face seal (35) being mounted to the inner surface of said rotating tailboard (30) or said first cavity (21) to seal a rotating gap filled between said rotating tailboard (30) and said body (20);

wherein the face seal (35) comprises:

a pair of first face seals (351), the first face seals (351) being in one-to-one correspondence with the side walls (32), one side surface of the first face seal (351) being bonded to the side wall (32) or the circular-arc-shaped inner surface (21 a) so that the other side surface of the first face seal (351) is in sliding contact with the circular-arc-shaped inner surface (21 a) or the side wall (32); and

and a pair of second surface seals (352), wherein the second surface seals (352) are in one-to-one correspondence with a pair of short sides of the rectangular substrate (31), and one side surface of the second surface seals (352) is attached to the short sides or the planar inner surface (21 b) so that the other side surface of the second surface seals (352) is in sliding contact with the planar inner surface (21 b) or the short sides.

7. The camera according to claim 1, wherein the turning tail plate (30) comprises a turning plate (36), the turning plate (36) being mounted to a side surface of the rectangular base plate (31) facing away from the first cavity (21) and protruding from one of the long sides of the rectangular base plate (31) in an extension plane of the rectangular base plate (31), wherein the turning plate (36) is adjacent to one end corner of the rectangular base plate (31);

the camera comprises a motor driving mechanism, the motor driving mechanism is arranged on the body (20) and is positioned outside the first cavity (21), and the motor driving mechanism applies an external force along the optical axis direction to the rotating plate (36) so as to drive the rotating tail plate (30) to drive the sensor assembly (10) to rotate relative to the body (20) by taking the rotating shaft (33) as an axis.

8. The camera of claim 7, wherein the motor drive mechanism comprises:

a motor (41), the motor (41) being mounted to the body (20);

a guide shaft (42) and an output shaft (43), each of the guide shaft (42) and the output shaft (43) extending in the optical axis direction and being arranged at intervals in the direction of the short side in the body (20);

a pressing plate (44), the pressing plate (44) is simultaneously penetrated through the guide shaft (42) and the output shaft (43) to be limited to extend along the direction of the short side and translate along the optical axis direction, and the front end of the pressing plate is abutted against the rotating plate (36);

wherein the motor (41) outputs rotational power around an axial direction thereof via the output shaft (43), the output shaft (43) is screw-fitted with the pressing plate (44), the guide shaft (42) is interference-fitted with the pressing plate (44), and the pressing plate (44) is restrained to translate in the optical axis direction via a limit of the guide shaft (42) under rotational driving of the output shaft (43) to apply an external force in the optical axis direction to the rotating plate (36).

9. The camera according to claim 8, wherein the guide shaft (42) is located closer to the rotary tailboard (30) than the output shaft (43), and the output shaft (43) is screw-fitted with the rear end of the pressing plate (44);

the length of the rotating plate (36) is larger than the distance between the guide shaft (42) and the rotating tail plate (30), and a fork-shaped part (361) avoiding the guide shaft (42) is arranged at the end part of the rotating plate (36);

the motor driving mechanism comprises a return spring (45), the return spring (45) is sleeved on the guide shaft (42), the return spring (45) and the pressing plate (44) are respectively positioned on two sides of the rotating plate (36), and the return spring (45) and the pressing plate (44) respectively apply external forces with opposite directions to the rotating plate (36) along the guide shaft (42);

the initial length of the return spring (45) corresponds to the upper limit position of the rotating plate (36) furthest from the first cavity (21).

10. The camera according to claim 8, wherein a top edge of the circular arc-shaped inner surface (21 a) has a groove (24) recessed into the first cavity (21), the groove (24) corresponding to the position of the rotation plate (36), the recess depth of the groove (24) being configured to avoid a lower limit position of the rotation plate (36) that is most deep into the first cavity (21).