CN210626881U - Light source scanning unit and printer applied by same - Google Patents
Light source scanning unit and printer applied by same Download PDFInfo
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- CN210626881U CN210626881U CN201921639774.3U CN201921639774U CN210626881U CN 210626881 U CN210626881 U CN 210626881U CN 201921639774 U CN201921639774 U CN 201921639774U CN 210626881 U CN210626881 U CN 210626881U
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Abstract
A light source scanning unit and a printer using the same belong to the technical field of printers, copiers and the like. The technical scheme is as follows: the method comprises the following steps: light source unit, main control board, selenium drum, the light source unit with the main control board is connected, the light source unit with the selenium drum sets up relatively, the light source unit includes: the light source is fixed on the light source support, the light source support and the light source are arranged in the outer cover, the light source control panel is fixed on the outer cover, the light source is connected with the light source control panel, the light source board is arranged on one side, opposite to the light source, of the light source, and the light source board is fixed on the outer cover. The utility model has the advantages of light source scanning unit and printer that is used thereof simple structure, do not need the lens combination of high accuracy, let the point on the light path board correspond the switch through the mode of control light source, realize the output of data, effectively improved and printed duplicating speed and precision.
Description
Technical Field
The utility model belongs to the technical field of printer, duplicator etc., especially, relate to a light source scanning unit and printer by using thereof.
Background
Most laser printers in the market generally use a laser scanning unit combined by a combined lens as a light source, irradiate light onto a photosensitive drum of a toner cartridge assembly at a corresponding position according to the irradiation requirement of the laser scanning unit, and complete a laser printing task through a series of processes such as exposure, development, transfer printing, fixation, cleaning and the like. The laser scanning unit consists of a motor, a prism, a combined lens and a circuit board, the motor has high required precision, the prism and the combined lens have strict requirements on surface precision, curvature of each part of a curved surface and light transmittance, so that the laser has high cost, and meanwhile, due to the requirements of the prism and the combined lens, the requirements on the position of a photosensitive drum and the position of the laser are strict, so that the laser has high installation precision.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the above-mentioned prior art, the utility model provides a light source scanning unit and printer by using thereof, this light source scanning unit simple structure does not need the lens combination of high accuracy, and the mode through the control light source lets the point on the light path board correspond the switch, realizes the output of data, has effectively improved and has printed duplicating speed and precision.
The technical scheme is as follows:
a light source scanning unit comprising: light source unit, main control board, selenium drum, the light source unit with the main control board is connected, the light source unit with the selenium drum sets up relatively, the light source unit includes: the light source is fixed on the light source support, the light source support and the light source are arranged in the outer cover, the light source control panel is fixed on the outer cover, the light source is connected with the light source control panel, the light source board is arranged on one side, opposite to the light source, of the light source, and the light source board is fixed on the outer cover.
Furthermore, a plurality of light spots and driving circuits with the same number are arranged on the light path board, and each driving circuit is connected with the corresponding light spot.
Further, the number of the light sources is the same as the number of the light spots.
Further, the position of the light spots is set in a mode that the array matrix is uniformly arranged.
Further, the driving circuit includes: the circuit comprises a resistor R1, an optical path switch and a triode Q1, wherein one end of the resistor R1 is grounded, and the other end of the resistor R1 is connected with the optical path switch; one end of the light path switch is grounded, the other end of the light path switch is connected with the joint of the resistor R1 and the triode Q1, the first end of the triode Q1 is connected with the light source control board, the second end of the triode Q1 is grounded, and the third end of the triode Q1 is connected with the joint of the resistor R1 and the light path switch.
The utility model discloses still include a printer of using light source scanning unit, including the foretell light source scanning unit of a plurality of groups, with the roller, magnetism roller, the transfer roller of charging of the same quantity of light source scanning unit, charge roller and magnetism roller setting in the top that corresponds the selenium drum separately, all with the selenium drum contact is connected, the transfer roller sets up the below of selenium drum, with the selenium drum contact is connected.
Further, the paper discharging device further comprises a fixing pressure roller and a heating film, wherein the fixing pressure roller and the heating film are arranged in the paper discharging direction of the light source scanning unit group, and the fixing pressure roller and the heating film are in contact connection.
Further, still including going out paper top roller and play paper bottom roller, go out paper top roller and go out paper bottom roller and set up in exit slot department, go out paper top roller and go out paper bottom roller contact connection.
The utility model has the advantages that:
a light source scanning unit and printer by using thereof, the light that its light source sent is normally open state, and the digital signal of content will be printed to the light source control panel becomes the signal of telecommunication, exports to the light path board of light source unit on, a light spot is launched to the light source, the point that the light path board corresponds is for leading to the state, light is through this point, all the other points are unchangeable, for off-state, the here is dark state, light is here blocked. The light source unit irradiates digital signals of contents to be printed onto the photosensitive drum, photoelectric images with light spots as units are formed on the drum, the contents to be printed are printed on the photosensitive drum by controlling the on and off of the spots on the light path board, and the spots on the light path board correspond to switches by controlling the light source, so that data output is realized, and the printing and copying speed and precision are effectively improved.
The structure is simple, high-precision lens combination and high-precision motor matching are not needed, the assembly cost and the manufacturing cost are reduced, the flexibility of the design scheme of the printer is increased, the technical difficulty is obviously reduced particularly for large-size printers, and the cost and the manufacturing period are greatly reduced.
Drawings
Fig. 1 is a light spot control driving circuit diagram of the present invention;
fig. 2 is a schematic diagram of the present invention when the light spot is blocked;
FIG. 3 is a schematic view of the present invention when light passes through;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a diagram of the light path board for the light source direction projection of the present invention;
FIG. 6 is a schematic diagram of the structure and operation of a printer using a light source scanning unit according to the present invention;
the reference numbers in the figures are as follows: 1-light source, 2-light path board, 3-light source bracket, 4-outer cover, 5-light source control board, 6-selenium drum, 7-light spot, 8-charging roller, 9-magnetic roller, 10-transfer roller, 11-pressure roller, 12-heating film, 13-paper output upper roller, 14-paper output lower roller, 15-paper box and 16-paper output channel.
Detailed Description
The light source scanning unit and the printer to which it is applied will be further described with reference to fig. 1-5.
Example 1
A light source scanning unit for use in a printer/copier, comprising: light source unit, main control board, selenium drum 6, light source unit with the main control board is connected, light source unit with the relative setting of selenium drum 6, light source unit includes: light source 1, light path board 2, light source support 3, dustcoat 4, light source control panel 5, light source 1 is fixed on light source support 3, place in light source support 3 and light source 1 in dustcoat 4, light source control panel 5 is fixed on the dustcoat 4, light source 1 with light source control panel 5 is connected, light path board 2 sets up one side that light source 1 is relative, light path board 2 is fixed on the dustcoat 4.
Further, a plurality of light spots 7 and driving circuits with the same number are arranged on the light path board 2, and each driving circuit is connected with the corresponding light spot 7.
Further, the number of light sources 1 is the same as the number of light spots 7.
Further, the position of the light spots is set in a mode that the array matrix is uniformly arranged.
Further, the driving circuit includes: the circuit comprises a resistor R1, an optical path switch and a triode Q1, wherein one end of the resistor R1 is grounded, and the other end of the resistor R1 is connected with the optical path switch; one end of the light path switch is grounded, the other end of the light path switch is connected with the joint of the resistor R1 and the triode Q1, the first end of the triode Q1 is connected with the light source control board, the second end of the triode Q1 is grounded, and the third end of the triode Q1 is connected with the joint of the resistor R1 and the light path switch.
This application adopts simple light source unit structure as light source 1, and the main control board of printer becomes the digital signal of the image that needs to print, becomes the signal of telecommunication, on output light source scanning unit's light path board 2, makes it launch a light spot, and the point that light path board 2 corresponds is the on-state, and light passes through this point, for the on-state, all the other points are unchangeable, for the off-state, and light is here blocked. When the light of the light source unit irradiates a digital signal of an image to be printed onto the photosensitive drum of the toner cartridge 6 assembly, exposure is called.
The photosensitive drum is charged by the charging roller 8 before, the resistance of the exposed part is obviously reduced, the surface charge is neutralized and disappears with the charge of the part, the unexposed surface charge is still kept unchanged, and a photoelectric image in a light spot unit is formed on the drum. By controlling the on and off of the points on the light path board 2, the image to be printed is printed on the photosensitive drum, the carbon powder on the magnetic roller 9 jumps to the photosensitive drum when the electrostatic latent image passes through the carbon powder bin, the jumped carbon powder is attached to the bright part of the surface of the photosensitive drum forming the electrostatic latent image, and the carbon powder in the dark part is repelled and is not attached. Through these processes, a toner image is formed on the photosensitive drum, the toner image on the surface of the photosensitive drum is transferred to paper by high-voltage static electricity of the transfer roller 10, and then the toner is melted and fixed on the paper by high temperature through the pressure roller 11 and the heating film 12 in the fixing assembly, thereby completing printing.
Example 2
A printer applying a light source scanning unit comprises a plurality of groups of light source scanning units in embodiment 1, and a charging roller 8, a magnetic roller 9 and a transfer roller 10 which are the same in number as the light source scanning units, wherein the charging roller 8 and the magnetic roller 9 are arranged above the selenium drum 6 respectively and are in contact connection with the selenium drum 6, and the transfer roller 10 is arranged below the selenium drum 6 and is in contact connection with the selenium drum 6.
Further, the paper discharging device further comprises a fixing pressure roller 11 and a heating film 12, wherein the fixing pressure roller 11 and the heating film 12 are arranged in the paper discharging direction of the light source scanning unit group, and the fixing pressure roller 11 and the heating film 12 are in contact connection.
Further, still include go up running roller 13 and go out paper bottom roller 14 on going out the paper, go out paper top roller 13 and go out paper bottom roller 14 and set up in exit slot department, go out paper top roller 13 and go out paper bottom roller 14 contact connection.
As shown in fig. 6, the printing paper starts from the paper box 15, passes through the paper feeding channel 16, enters the light source scanning unit, the photosensitive drum of the selenium drum 6 assembly is charged under the action of the charging roller 8, the resistance of the exposed part is obviously reduced, the surface charge is neutralized and disappears with the charge of the part, the unexposed surface charge remains unchanged, and a photoelectric image in the unit of light spot is formed on the drum.
By controlling the on and off of the points on the light path board 2, the image to be printed is printed on the photosensitive drum, the carbon powder on the magnetic roller 9 jumps to the photosensitive drum when the electrostatic latent image passes through the carbon powder bin, the jumped carbon powder is attached to the bright part of the surface of the photosensitive drum forming the electrostatic latent image, and the carbon powder in the dark part is repelled and is not attached.
Through these processes, a toner image is formed on the photosensitive drum, the toner image on the surface of the photosensitive drum is transferred to paper by high-voltage static electricity of the transfer roller 10, and then the toner is melted and fixed on the paper by high temperature through the pressure roller 11 and the heating film 12 in the fixing assembly, thereby completing printing.
The printing paper reaches the paper output position via the paper output upper roller 13 and the paper output lower roller 14.
Example 3
The present embodiment is composed of the following components: the light source unit comprises a light source 1, a light path plate 2, a light source support 3, an outer cover 4, a light source control plate 5 and the like. The light spots on the light path plate 2 are uniform spots, each spot is controlled by a driving circuit, as shown in fig. 1, when driving and controlling the low level of the spot C, the Q1 is in the off state, which is equivalent to an open circuit, and the potential of the spot a is equal to the potential of the spot B and is equal to the potential of the spot VH. The potential difference between the two ends is zero, the potentials at the two ends of the light path switch are equal, the light path switch is in a closed state, and no light passes through, as shown in fig. 2. When the terminal C is high, Q1 is in a conducting state, which is equivalent to a short circuit, and the potential at the point A is conducted with the ground and equals to zero. At this time, two points A, B on the two ends of the optical path switch generate a potential difference, the potential difference is equal to VH potential, at this time, the optical path switch is turned over, light passes through the optical path switch, and the optical path switch is in an open state, as shown in fig. 3. When the point C returns to the low level, the light path switch returns to be closed. The above is a complete control process of the optical path switch.
The light source 1 in the light source unit is fixed on the light source support 3, the light source support 3 is installed on the outer cover 4, the light path board 2 is fixed on the outer cover 4, the number of the light source 1 is consistent with that of the light path board 2, the positions of the light source 1 and the light path board 2 correspond in parallel, a main control board of the printer receives a printer CPU instruction, digital signals of images needing to be printed are converted into electric signals, the electric signals are output to the light path board 2 of the light source unit to enable the electric signals to emit corresponding light spots, the light spots 7 irradiate the light path board 2, the corresponding light spots on the light path board 2 are in an on state, light passes through the light spots and are in an on state, other light spots are. By controlling the on and off of the dots on the light path plate 5, the image and contents to be printed are printed on the photosensitive drum, so that the light source unit irradiates the digital signal of the image to be printed onto the photosensitive drum, and an electrostatic latent image in units of the light spots 7 is formed on the drum. The light path plate 2 is composed of dots composed of an array matrix, and the dots have two states, on and off, light can pass through when on, and light is blocked when off. And issuing an instruction according to the printing content by a CPU of the printer, switching off the corresponding light spot, and printing the scanning content of the light source on the photosensitive drum to finish printing. Each line of light spots corresponds to one line, the rotation speed of the photosensitive drum is different according to the printing speed, the longitudinal distance of the corresponding light spots is the bit number of the speed, and the multiple lines are adopted, so that the deficiency of the spots can be compensated, and the printing speed can be accelerated.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (7)
1. A light source scanning unit, comprising: light source unit, main control board, selenium drum (6), light source unit with the main control board is connected, light source unit with selenium drum (6) sets up relatively, light source unit includes: light source (1), light path board (2), light source support (3), dustcoat (4), light source control panel (5), light source (1) is fixed on light source support (3), place in light source support (3) and light source (1) in dustcoat (4), light source control panel (5) are fixed on dustcoat (4), light source (1) with light source control panel (5) are connected, light path board (2) set up one side that light source (1) is relative, light path board (2) are fixed on dustcoat (4), be provided with light spot (7) and the drive circuit of a plurality of quantity that equals on light path board (2), every drive circuit is connected with corresponding light spot (7) respectively.
2. A light source scanning unit as claimed in claim 1, characterized in that the number of light sources (1) is the same as the number of light spots (7).
3. A light source scanning unit as claimed in claim 1, characterized in that the spots (7) are positioned in such a way that the matrix of the array is uniformly arranged.
4. The light source scanning unit of claim 1, wherein the driving circuit comprises: the circuit comprises a resistor R1, an optical path switch and a triode Q1, wherein one end of the resistor R1 is grounded, and the other end of the resistor R1 is connected with the optical path switch; one end of the light path switch is grounded, the other end of the light path switch is connected with the joint of the resistor R1 and the triode Q1, the first end of the triode Q1 is connected with the light source control board, the second end of the triode Q1 is grounded, and the third end of the triode Q1 is connected with the joint of the resistor R1 and the light path switch.
5. A printer using a light source scanning unit is characterized by comprising a plurality of groups of light source scanning units as claimed in any one of claims 1 to 4, and the same number of charging rollers (8), magnetic rollers (9) and transfer rollers (10) as the light source scanning units, wherein the charging rollers (8) and the magnetic rollers (9) are arranged above the corresponding selenium drums (6) and are in contact connection with the selenium drums (6), and the transfer rollers (10) are arranged below the selenium drums (6) and are in contact connection with the selenium drums (6).
6. The printer employing the light source scanning unit according to claim 5, further comprising a fixing pressure roller (11) and a heating film (12), the fixing pressure roller (11) and the heating film (12) being disposed in the sheet discharging direction of the light source scanning unit group, the fixing pressure roller (11) and the heating film (12) being in contact connection.
7. The printer using the light source scanning unit according to claim 5, further comprising a paper output upper roller (13) and a paper output lower roller (14), wherein the paper output upper roller (13) and the paper output lower roller (14) are disposed at the paper output port, and the paper output upper roller (13) and the paper output lower roller (14) are in contact connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921639774.3U CN210626881U (en) | 2019-09-29 | 2019-09-29 | Light source scanning unit and printer applied by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921639774.3U CN210626881U (en) | 2019-09-29 | 2019-09-29 | Light source scanning unit and printer applied by same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210626881U true CN210626881U (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921639774.3U Active CN210626881U (en) | 2019-09-29 | 2019-09-29 | Light source scanning unit and printer applied by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210626881U (en) |
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2019
- 2019-09-29 CN CN201921639774.3U patent/CN210626881U/en active Active
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