CN112782908B

CN112782908B - Shutter device and image forming apparatus

Info

Publication number: CN112782908B
Application number: CN201911084109.7A
Authority: CN
Inventors: 梁启晨
Original assignee: Hangzhou Hikmicro Sensing Technology Co Ltd
Current assignee: Hangzhou Hikmicro Sensing Technology Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2022-04-26
Anticipated expiration: 2039-11-07
Also published as: CN112782908A

Abstract

The application provides a separation blade device and imaging device, the separation blade device includes: a base; the blocking pieces are movably arranged on the base and comprise a first blocking piece and a second blocking piece, and the opening voltage of the first blocking piece is smaller than that of the second blocking piece; and the driving assembly is arranged on the base and used for driving the blocking piece to move relative to the base, the first blocking piece and the second blocking piece are driven by the same driving assembly, the driving assembly is used for driving the first blocking piece to be opened when receiving a first driving voltage, and driving the first blocking piece and the second blocking piece to be opened when receiving a second driving voltage, wherein the first driving voltage is smaller than the second driving voltage. A plurality of separation blades in the separation blade device can be driven by the same driving component, so that the difficulty of internal wiring design and assembly of the imaging equipment is reduced, the size of the imaging equipment is reduced, and the cost of the imaging equipment is reduced.

Description

Shutter device and image forming apparatus

Technical Field

The application relates to the technical field of imaging, in particular to a baffle device and imaging equipment.

Background

Imaging devices such as video cameras, thermal imagers, etc. are increasingly used in daily life, and these imaging devices use light sensors or light detectors to receive light (such as infrared light) from a subject and form corresponding image content. However, factors such as the brightness of ambient light, the ambient temperature, and the temperature of the subject themselves all affect the imaging effect of the imaging device, and therefore, it is proposed in the related art to install a blocking plate in the imaging device to improve the imaging effect by attenuating/filtering the light.

In the conventional method, a plurality of flap devices are arranged in an image forming apparatus, each flap device includes a flap and a set of driving components, and the flap in each flap device is driven by the driving components to move independently. Therefore, the wiring design inside the imaging device in the existing mode is complex, the size is large, and the cost is high.

Disclosure of Invention

The application provides a baffle device and an imaging device.

According to a first aspect of embodiments of the present application, there is provided a flap device, including:

a base;

the blocking pieces are movably arranged on the base and comprise a first blocking piece and a second blocking piece, and the opening voltage of the first blocking piece is smaller than that of the second blocking piece; and

the driving assembly is mounted on the base and used for driving the blocking piece to move relative to the base, the first blocking piece and the second blocking piece are driven by the same driving assembly, the driving assembly is used for driving the first blocking piece to be opened when receiving a first driving voltage, and driving the first blocking piece and the second blocking piece to be opened when receiving a second driving voltage, and the first driving voltage is smaller than the second driving voltage.

Optionally, the blocking piece is rotatably connected with the base;

the driving assembly is used for driving the baffle plate to rotate.

Optionally, the barrier device further includes:

the first blocking piece and the second blocking piece are rotatably arranged on the same rotating shaft.

Optionally, the blocking piece is assembled with a torsion spring and a magnetic piece, wherein the torsion of the torsion spring assembled with the first blocking piece and the second blocking piece is different.

Optionally, the magnetic force of the magnetic member assembled with the first blocking piece and the second blocking piece is different.

Optionally, the driving assembly includes a coil assembly mounted on the base, and the magnetic members of the first and second blocking pieces are located in a magnetic field range of the same coil assembly.

Optionally, the barrier device further includes a driving circuit connected to the driving assembly, and a controller connected to the driving circuit, where the controller is configured to control the driving circuit and provide the first driving voltage and the second driving voltage to the driving assembly.

Optionally, the driving circuit includes an H-bridge chip, and the driving component is connected to the same H-bridge chip.

Optionally, the coil assembly is wound around the base, and the magnetic member is located in a space surrounded by the coil assembly.

Optionally, the light transmittance of the first blocking piece is different from that of the second blocking piece.

According to a second aspect of embodiments of the present application, there is provided an image forming apparatus including an apparatus main body and the shutter device as described above, the base being fixedly attached to the apparatus main body.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

a plurality of separation blades can be driven by the same driving component, so that the difficulty of internal wiring design and assembly of the imaging equipment is reduced, the size of the imaging equipment is reduced, and the cost of the imaging equipment is reduced.

Drawings

Fig. 1 is a schematic structural view of an image forming apparatus in the related art;

fig. 2 is a schematic structural view of an image forming apparatus in the related art;

FIG. 3 is a schematic view of a structure of a baffle device provided in an exemplary embodiment of the present application;

FIG. 4 is a cross-sectional view of a flap device provided in accordance with an exemplary embodiment of the present application;

fig. 5 is a schematic diagram of a driving circuit according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Fig. 1 and fig. 2 are schematic structural diagrams of an imaging apparatus in the related art, where fig. 1 is a front view and fig. 2 is a top view. As shown in fig. 1 and 2, a photodetector 10 is provided in the imaging device, and a light tunnel 20 is provided in front of the photodetector 10. The light of the subject can be emitted to the light detector 10 through the light channel 20, and thus, the image acquisition of the subject can be realized.

Taking an imaging device such as a thermal imaging camera as an example, in practical applications, during operation of the light detector 10 in the thermal imaging camera, the gain value and the standard value thereof will shift from the stable region with the change of heat generated by adjacent electronic components or the temperature of the container, resulting in non-uniformity of the acquired image. In order to correct the gain value and the standard value of the light detector 10, it is proposed in the related art to provide a baffle device in the light tunnel 20 in front of the light detector 10. In the prior art, the blocking plate device includes a blocking plate and a set of driving assembly, the blocking plate is driven by the driving assembly to move, and when the blocking plate moves to the position right in front of the optical detector 10, part of infrared light emitted to the optical detector 10 can be blocked.

Further, in order to realize different gears in the related art, it is proposed to provide a plurality of sets of barrier devices in the light path 20 in front of the light detector 10, wherein each set of barrier devices is independent of each other. This independence is achieved in that the flaps in each flap arrangement are individually driven to move by the drive assembly therein. Therefore, in the existing mode, a plurality of sets of driving assemblies need to be arranged inside the imaging device, so that a plurality of groups of pins are needed, which brings great difficulty to the wiring design inside the imaging device and the assembly of the thermal imaging device, and leads to larger volume and higher cost of the imaging device.

Based on this, the application provides a separation blade device, through this separation blade device, can realize utilizing a plurality of separation blades of one set of drive assembly drive to move to make inside laying one set of drive assembly at imaging equipment can, reduced the degree of difficulty of imaging equipment internal wiring design and assembly from this, reduced imaging equipment's volume, and reduced imaging equipment's cost. The flap device proposed in the present application is explained in detail as follows:

as shown in fig. 3, the baffle device includes a base 30, a first baffle 40 and a second baffle 50 movably mounted on the base 30, and the first baffle 40 and the second baffle 50 can move relative to the base 30. The barrier device further includes a driving assembly 60 mounted on the base 30, the driving assembly 60 drives the first barrier 40 to open when receiving a first driving voltage, and drives the first barrier 40 and the second barrier 50 to open when receiving a second driving voltage, the first driving voltage being less than the second driving voltage. Therefore, the first blocking piece 40 and the second blocking piece 50 can be driven to move by using one set of driving assembly 60, so that the effect of generating different gears by driving at least one different blocking piece by one set of driving assembly 60 when different driving voltages are applied can be achieved.

When the driving voltage applied to the driving assembly 60 is not lower than the opening voltage of the first blocking piece 40, the first blocking piece 40 is driven to open, so that the first blocking piece 40 moves to the light-blocking working position. The driving voltage applied to the driving assembly 60 is not lower than the opening voltage of the first barrier 40 and lower than the opening voltage of the second barrier 50, the first barrier 40 is opened, and the second barrier 50 is not opened, so that an effect of one shift position can be produced. Wherein, the opening voltage of the second barrier 50 is larger than the opening voltage of the first barrier 40. When the driving voltage applied to the driving assembly 60 is not lower than the opening voltage of the second barrier 50, the driving voltage is also higher than the opening voltage of the first barrier 40, so that the first barrier 40 and the second barrier 50 are driven to open, and the first barrier 40 and the second barrier 50 both move to the light-blocking working position, thereby generating the effect of another gear.

It should be noted that, in fig. 3, only the first blocking piece 40 and the second blocking piece 50 are taken as an example, in practical applications, the blocking piece device provided in the present application may include a plurality of blocking pieces movably mounted on the base 30, and the present application does not limit the specific number of the blocking pieces. The same drive assembly 60 can drive three or more flaps in a similar manner to the two flap drive principle described above.

In an embodiment, the light transmittances of the first barrier sheet 40 and the second barrier sheet 50 are different, so that different gears can be achieved to generate different imaging effects, for example, one of the barrier sheets plays a role in attenuation, and the other barrier sheet plays a role in zero adjustment and correction.

In an embodiment, the first blocking piece 40 and the second blocking piece 50 are rotatably connected to the base 30, respectively, and the driving assembly 60 is configured to drive the first blocking piece 40 and the second blocking piece 50 to rotate relative to the base 30, so that the first blocking piece 40 and the second blocking piece 50 swing within a certain range to adjust the positions of the first blocking piece 40 and the second blocking piece 50.

Optionally, as shown in fig. 4, the blocking sheet device further includes a rotating shaft 70 installed on the base 30, the first blocking sheet 40 and the second blocking sheet 50 are rotatably installed on the same rotating shaft 70, and, as shown in fig. 4, the first blocking sheet 40 and the second blocking sheet 50 are stacked and installed on the same rotating shaft 70. Through this kind of setting, can be so that the whole volume miniaturization of separation blade device to reduce required installation space, and improve the convenience of assembly.

Alternatively, the first shutter piece 40 and the second shutter piece 50 may be rotatably installed on different rotating shafts.

In one embodiment, as shown in fig. 4, the first shutter 40 is equipped with a torsion spring 41 and a magnetic member 42, and the second shutter 50 is equipped with a torsion spring 51 and a magnetic member 52. The torsion forces of the torsion spring 41 and the torsion spring 51 are different, and/or the magnetic forces of the magnetic member 42 and the magnetic member 52 are different, so that the opening voltages of the first blocking piece 40 and the second blocking piece 50 are different, and the driving assembly 60 can drive at least one different blocking piece to open when receiving different driving voltages.

Optionally, the torsion spring 41 and the torsion spring 51 are sleeved on the rotating shaft 70, and taking the torsion spring 41 as an example, one end of the torsion spring abuts against the base 30, and the other end abuts against the first blocking piece 40. When the first blocking piece 40 is at the initial position, the torsion spring 41 pushes against the base 30 and the first blocking piece 40, so that the first blocking piece 40 is kept at the initial position. The initial position is a position where the flap does not block light. When the first shutter 40 moves from the initial position to the working position, the torsion spring 41 is torsionally deformed. When the first driving voltage is removed, the first blocking piece 40 can move from the working position to the initial position again under the restoring force of the torsion spring 41. The working position is a position where the baffle plate is opened and light rays are blocked.

The magnetic member 42 and the magnetic member 52 are made of a magnetic material such as a permanent magnet, a magnet, etc., and the magnetic member 42 is fixed to an end of the first blocking plate 40 connected to the rotating shaft 70, so that the magnetic force applied to the magnetic member 42 can cause the first blocking plate 40 to rotate relative to the base 30 from the initial position to the working position.

As apparent from the above description, the flap is driven to rotate relative to the base by the magnetic force applied to the magnetic member to which it is fitted, and the torsion spring to which it is fitted is torsionally deformed during the movement of the flap from the initial position to the working position, thereby generating a resistance force that hinders the movement of the flap, that is, the flap is moved from the initial position to the working position by the resultant force between the magnetic force of the magnetic member and the resistance force of the torsion spring. Therefore, the magnetic force of the magnetic member 42 and the magnetic member 52 is different, and/or the torsion force of the torsion spring 41 and the torsion spring 51 is different, and the resultant force applied to the first blocking piece 40 and the second blocking piece 50 under the same driving voltage is different, so that at least one different blocking piece can be opened under different driving voltages. The at least one different blocking piece may include a case where the number of the blocking pieces is different, or at least one blocking piece is different among the same number of the blocking pieces.

For example, when the drive assembly receives the drive voltage U1, the drive-on voltage is less than the flap motion of U1, e.g., the first flap 40 is driven to move, thereby creating the flap effect of one gear, and when the drive assembly receives the drive voltage U2, the drive-on voltage is less than the flap motion of U2, e.g., the first flap 40 and the second flap 50 are driven to move, thereby creating the flap effect of another gear, assuming that U2> U1.

In one embodiment, as shown in fig. 4, the driving assembly 60 includes a coil assembly 61 assembled to the base 30, the coil assembly 61 is wound around the base 30, and when energized, the coil assembly 61 can form an electromagnetic field, and the magnetic member 42 and the magnetic member 52 can be located in a space surrounded by the same coil assembly 61, so that the magnetic member 42 and the magnetic member 52 are located in a magnetic field range of the electromagnetic field formed by the same coil assembly 61. Thereby, the magnetic member 42 and the magnetic member 52 can be driven to rotate by the electromagnetic field formed by the coil assembly 61, and the first blocking piece 40 and the second blocking piece 50 can be rotated.

Alternatively, the length of the coil assembly 61 is defined by a resistance value, for example, the resistance value range of the coil assembly 61 is set to 20 Ω ± 5 Ω.

Optionally, the coil assembly 61 comprises two input pins.

In one embodiment, as shown in fig. 5, the flap device may further include a driving circuit 80 connected to the driving assembly 60, and a controller 90 connected to the driving circuit 80. The controller 90 is configured to control the driving circuit 80 to provide the first driving voltage and the second driving voltage to the driving assembly 60. The controller 90 outputs PWM signals with different duty ratios to the driving circuit 80, so that the driving circuit 80 outputs different driving voltages to the driving assembly 60, thereby driving one or more different shutters to open.

Optionally, the driving circuit 80 includes an H-bridge chip, and the driving component 60 is connected to the same H-bridge chip. The four-quadrant operation of the direct current motor can be conveniently realized by the H-bridge chip, namely the forward rotation, the forward rotation brake, the reverse rotation and the reverse rotation brake of the coil assembly 61 are conveniently realized. Alternatively, the driving circuit 80 is connected to the two input pins of the coil assembly 61, so that power supply to the coil assembly 61 can be realized.

The baffle device disclosed by the embodiment is applied to the imaging equipment so as to reduce the difficulty of internal wiring design and assembly of the imaging equipment, reduce the volume of the imaging equipment and reduce the cost of the imaging equipment.

In an embodiment, the image forming apparatus includes an apparatus body to which the base 30 is attached, and a shutter device as disclosed in the above embodiment.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A flap device, comprising:

a base;

2. The flap device of claim 1, wherein the flap is rotatably connected to the base;

the driving assembly is used for driving the baffle plate to rotate.

3. The flap device of claim 2, further comprising:

4. The flap device according to claim 1, wherein the flap is equipped with a torsion spring, wherein the torsion forces of the torsion springs with which the first and second flaps are equipped are different.

5. The flap device according to any one of claims 1 to 4, wherein the flap is equipped with a magnetic member, and the magnetic force of the magnetic member with which the first flap and the second flap are equipped is different.

6. The flap device of claim 5, wherein the drive assembly includes a coil assembly mounted to the base, the magnetic members of the first and second flaps being located within a magnetic field of the same coil assembly.

7. The flap device according to claim 1, further comprising a drive circuit connected to the drive assembly, and a controller connected to the drive circuit for controlling the drive circuit to provide the first drive voltage and the second drive voltage to the drive assembly.

8. The flap device according to claim 7, wherein the drive circuit includes an H-bridge chip, the drive component being connected to the same H-bridge chip.

9. The baffle device of claim 1, wherein the light transmittance of the first baffle and the second baffle is different.

10. An image forming apparatus comprising an apparatus body and the flap device according to any one of claims 1 to 9, wherein the base is attached to the apparatus body.