JP2004235944A - Image reading and recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reading and recording apparatus wherein the torque of a torsion bar used for a turning mechanism of a read unit to upwardly turning the read unit is adjusted to a value proper to the respective unit. <P>SOLUTION: The image reading and recording apparatus includes the recording unit and the read unit located above the recording unit and having a shaft at the end. The turning means of the read unit used when the read unit is turned by using the shaft for a turning center comprises: a plurality of torsion bars located nearly in the middle of the read unit and part of a joint mechanism located in the vicinity of the gravity center of the read unit and having a restoration force. Tips of moving sides of the plurality of the torsion bars are formed to be semi-circular with different radii or square with bending lengths different from each other. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image reading and recording apparatus, and in particular, is suitably applied to an image reading and recording apparatus such as a copying machine, a scanner printer, and a facsimile, which has a pressure plate unit and an automatic document separation and conveyance device.
[0002]
[Prior art]
At present, a computer peripheral device called a multifunction peripheral having an ink cartridge exchange type ink jet printer in a recording section and a flatbed scanner in a reading section has been manufactured.
[0003]
This multifunction peripheral is connected to a computer and has a function as a printer, a function as a flatbed scanner, and a copy function by itself.
[0004]
Further, an automatic document separation / conveyance unit and a communication unit for separating a plurality of document bundles are added to such a configuration, and an apparatus having a facsimile function and a network function in addition to the above functions is also manufactured.
[0005]
In these multifunction devices, a recording unit is disposed below the reading unit in order to reduce the occupied area of the apparatus.
[0006]
For this reason, for example, in a multifunction machine that employs an ink cartridge exchange type ink jet printer in the recording unit, when replacing the ink cartridge, the upper part of the recording unit is opened by moving the reading unit to replace the ink cartridge. A mechanism is needed to secure space for the operation.
[0007]
The scanner unit that constitutes the reading unit of the multifunction peripheral has a round shaft at the rear, and is configured to be able to rotate the scanner unit upward about the above-mentioned round shaft as a center of rotation. Thus, by rotating the scanner unit upward and opening the upper part of the recording unit, a space for exchanging the ink cartridge can be secured.
[0008]
The reading unit includes a reading sensor unit, a motor, a gear train, a belt, and a pulley. Then, a drive unit for moving the reading sensor unit in the sub-scanning direction, a metal shaft serving as a rail function when the reading sensor unit moves, an exterior of the reading unit, a platen glass for placing the document, and a glass for the document. It has a pressure plate unit that presses against the surface.
[0009]
With such a configuration, the above-described reading unit becomes heavy. For this reason, it is extremely difficult for the user to rotate and hold it upward by himself, as well as the operability is deteriorated.
[0010]
Furthermore, in a multifunction machine having an automatic document separation and conveyance unit instead of the pressure plate unit, since the multifunction device has rollers, gear trains and a motor for separating and conveying the document, the multifunction peripheral further has a reading unit of a pressure plate unit type. Heavier.
[0011]
Therefore, in order to improve operability, in a multifunction peripheral having an ink jet printer as a recording unit, a reading unit rotating mechanism configured to rotate the reading unit upward by a force of a spring or the like and lift the reading unit is provided. .
[0012]
A torsion bar is often used for the rotation mechanism of the reading unit. This torsion bar has advantages that it can be configured in a small space, has a simple structure, and can exert a strong spring force. Therefore, products using a torsion bar have been produced to supply a force for rotating the reading unit upward.
[0013]
By the way, for the reasons described above, the weight of the reading unit has to be increased. Further, the center of gravity of the reading unit is not at the center of the reading unit but is shifted from this center to one side of the unit.
[0014]
If the torsion bar for supplying the force for rotating the reading unit upward is not arranged at the center of gravity of the reading unit, the balance supporting the reading unit is deteriorated.
[0015]
As a result, when the reading unit is rotated upward or when the user attempts to close the reading unit, one side of the reading unit is tilted, and the operability is extremely deteriorated.
[0016]
Therefore, conventionally, two torsion bars are disposed one by one on the left and right sides of the reading unit, and the spring force of one torsion bar having the center of gravity of the reading unit is made stronger than the spring force of the other torsion bar. This balances the reading unit left and right.
[0017]
That is, the multifunction peripheral includes a device in which the pressure plate unit is disposed on the platen glass and a device in which the automatic document separation and conveyance unit is disposed on the platen glass. If the configuration of the multifunction machine is such that the recording unit, exterior, and electrical unit are common, and only the pressure plate unit and the automatic document separation and conveyance unit have different configurations, the two types of multifunction machines should be manufactured with almost common parts. Can be.
[0018]
Further, in this case, the time required for designing and examining a new component can be shortened, so that there is an additional advantage that the development period can be shortened. Further, the production cost can be reduced.
[0019]
However, the conventional multifunction peripheral having the above-described configuration has the following problem. That is, since the automatic separation document conveyance unit includes rollers, gear trains, motors, and the like for document separation conveyance, it has a configuration that is heavier than the pressure plate unit.
[0020]
As described above, it is difficult to use a common torsion bar because the weights of the automatic document feeder unit and the pressure plate unit are significantly different.
[0021]
However, if the shape of the torsion bar is greatly changed between the automatic document separation and conveyance unit type device and the pressure plate type device, it is necessary to change the parts related to the torsion bar installation other than the automatic document separation and conveyance unit and the pressure plate unit, There are many places that cannot be shared.
[0022]
Therefore, a torsion bar having a similar shape and supplying a spring force suitable for the weight of each unit is required.
[0023]
Here, the spring force supplied by the torsion bar is determined by the material, diameter, length and angle. Therefore, conventionally, adjustment has been made by changing the material and diameter without changing the length or angle.
[0024]
However, since the material and diameter of the torsion bar which are generally distributed are limited, it is difficult to adjust the spring force supplied by the torsion bar according to the automatic document separation and conveyance unit and the pressure plate unit. .
[0025]
When the above-described configuration is realized, the torsion bar required for the automatic document separation / conveyance unit type and the torsion bar required for the pressure plate unit type have similar shapes. Therefore, when assembling or repairing at a factory, the torsion bar for the automatic document separation / conveyance unit type is assembled to the press plate type multifunction machine, or the torsion bar for the pressure plate unit type is used for the automatic separation / conveyance unit type multifunction machine. The problem of assembling occurs.
[0026]
Also, if the torsion bar for the automatic document separation / conveyance unit type is excessively assembled to the multifunction machine of the pressure plate unit type, when the user lifts the reading unit, this reading unit vigorously rotates upward, thereby rotating. There is a problem that the shaft is damaged.
[0027]
Conversely, if the torsion bar for the pressure plate unit type is assembled into an automatic document separation / conveyance unit type multifunction machine, the reading unit will move upward because the spring force of the torsion bar for the pressure plate unit type, that is, the rotating power is weak. The problem of not opening occurs.
[0028]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a multifunction device of an automatic document separation / conveyance unit type and a multifunction device of a pressure plate unit type, in which the rotating power of a torsion bar used in a reading unit rotating mechanism for rotating each reading unit upward is respectively. It is an object of the present invention to provide an image reading / recording apparatus which is adjusted to an appropriate value for a unit.
[0029]
Another object of the present invention is to prevent a torsion bar used for an automatic document separation / conveyance unit type multifunction device and a pressure plate unit type multifunction device from being assembled together by different types of multifunction devices. It is an object of the present invention to provide an image reading and recording apparatus capable of performing the above.
[0030]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides
An image reading and recording apparatus having recording means for recording an image and reading means for reading the image, wherein the reading means is disposed above the recording means and has an axis at an end portion,
The reading means is configured to be rotatable around an axis,
The rotating means for rotating the reading means upward includes a first rotating means comprising a plurality of torsion bars arranged substantially at the center of the reading means and a second rotating means having a restoring force arranged near the center of gravity of the reading means. And rotating means,
Tip portions of the plurality of torsion bars as the first rotating means have a semicircular shape or a square shape.
It is characterized by the following.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In all the drawings of the following embodiment, the same or corresponding parts are denoted by the same reference numerals. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments are not intended to limit the scope of the present invention only to them unless otherwise specified.
[0032]
First, an image reading and recording apparatus according to an embodiment of the present invention will be described. FIG. 1 is a schematic sectional view of an image reading / recording apparatus according to the embodiment, and FIG. 2 is a schematic perspective view of the image reading / recording apparatus.
[0033]
As shown in FIG. 1, in the image reading and recording apparatus according to the embodiment, a recording unit A as a recording unit including an ink jet recording apparatus, a reading unit B as a reading unit for optically reading a document, An operation unit C provided with a display unit and operation keys, a power supply unit D for supplying power to the device, a control unit (not shown) for controlling the entire device, and a connection for connecting data from a personal computer or the like. For example, it is composed of an electrical component unit in which the units are integrated in one place, and a housing that covers these device components.
[0034]
As shown in FIG. 2, the housing includes a rear cover 1 for covering the rear surface of the device, a middle cover 2 located at the middle side of the device, a bottom cover 3 at the lower portion of the device, and a front cover left at the left of the front surface of the device. 4a, a front cover right 4b (see FIG. 7) located on the right side of the front of the apparatus, an operation lower cover 6 located below the operation unit C, an operation panel 7 located above the operation cover 7, a scanner cover 8 covering the reading unit, and It is composed of a pressure plate unit 9 for pressing the original placed on the reading unit B from above.
[0035]
As shown in FIG. 3, the pressure plate unit 9 is configured to be rotatable by hinges provided at two positions at its ends, and is also provided so as to cover the document table. .
[0036]
Further, a white sheet is disposed on the pressure plate unit 9 so as to be in close contact with the contact glass. A sponge is provided between the pressure plate unit 9 and a white sheet (not shown) so that the white sheet can be in close contact with the contact glass up to the periphery in the case of a thick original.
[0037]
(Conveying recording paper)
Next, conveyance of a recording sheet as a recording material will be described. In this embodiment, an example in which a regular cut sheet is used will be described.
[0038]
That is, as shown in FIG. 1, a plurality of the normal fixed-size cut sheets are stored in the auto sheet feeder 26. The auto sheet feeder 26 is configured so that a side surface of the recording paper can be guided by a slider 27 in accordance with the size of the recording paper. Note that a recording paper cover 10 is provided to prevent dust from accumulating on the loaded recording paper and foreign substances from entering the recording unit.
[0039]
The recording paper stored and stacked in the automatic sheet feeder 26 is separated and conveyed one by one by a paper feed roller and a separation pad (neither is shown). Thereafter, the sheet is nipped and conveyed to the recording unit A.
[0040]
In the recording unit A, recording is performed by a recording head. The recording unit A includes a recording head, a discharge roller positioned downstream of the recording head, which conveys the printed recording paper toward the downstream side of the apparatus, and a recording paper on the opposite side of the discharge roller. And a spur made of a material to which ink is not transferred even when it comes into contact with the surface.
[0041]
The recording paper conveyed by the paper discharge rollers and the spurs is discharged onto a recording paper discharge tray 5 provided at the front of the apparatus main body.
[0042]
Further, in this embodiment, the image reading and recording apparatus is compatible with rigid recording materials such as CD-Rs (Compact Disc-Recordable) in addition to cut sheets of a regular shape. Then, when printing on the printing surface of the CD-R, the CD-R is set in the CD-R dedicated feeder and inserted from the recording paper discharge side on the front of the apparatus.
[0043]
In this case, in conjunction with the insertion of the feeder into the apparatus, the spur on the opposite side of the paper discharge roller is retracted upward, and the J-shaped recording paper path from the rear of the apparatus is opened. . With this configuration, the image reading and recording apparatus according to the embodiment can transport a rigid recording material such as a CD-R horizontally without bending.
[0044]
That is, when printing is performed on the rigid recording material, the rigid recording material is first conveyed past the recording head to the rear of the apparatus. Thereafter, the sheet is conveyed again in the sheet discharging direction, and printing is performed at this time.
[0045]
(Reading unit)
Next, a flatbed scanner used in the reading unit B according to the embodiment will be described.
[0046]
That is, the image reading sensor 41 composed of a contact image sensor is supported by a carriage (not shown) and is configured to be movable in the sub-scanning direction. The movement of the carriage is performed by a timing belt (neither is shown) driven by a motor.
[0047]
The image sensor incorporates a light source, a lens, and a photoelectric conversion element (all are not shown), and is configured to be movable at a fixed distance on the back side of a contact glass serving as a document table. Then, the image data based on the read image is transmitted to an image processing unit of the main body, that is, a control unit via a flexible cable or the like.
[0048]
As shown in FIG. 7, when the reading unit B faces the operation unit C of the apparatus, the reading unit B is provided with a center of rotation at the back thereof and is configured to be rotatable. When the button 36 is depressed, the reading unit B is rotated to the rear of the apparatus as shown in FIG. 4, and the recording head is replaced and the ink tanks 22, 23, 24 and 25 are replaced as shown in FIG. The space required for replacement is open.
[0049]
(Recording unit)
Next, the configuration of the recording unit A according to this embodiment will be described.
[0050]
That is, the recording head used in the recording unit A is configured so that the ink is ejected from the ejection port at the tip of the nozzle by the pressure of the film boiling generated in the ink due to the heat generated by the electrothermal conversion element provided in the nozzle. It is configured.
[0051]
Here, a recording head unit as a recording unit used in the image reading and recording apparatus according to the embodiment of the present invention will be described.
[0052]
That is, a recording head section applied to an ink jet recording apparatus generally includes a fine liquid ejection port (orifice), a liquid passage and an energy acting section provided in a part thereof, and a liquid acting on the liquid in the acting section. Energy generating means for generating droplet forming energy. The recording head is replaceable.
[0053]
In addition, as an energy generating means for generating energy for ink ejection, a means using an electromechanical transducer such as a piezo element or irradiating an electromagnetic wave such as a laser to absorb the energy in the liquid to generate heat. In addition, there can be mentioned those in which droplets are ejected by the action of heat generation and flying, and those in which liquid is ejected by heating the liquid with an electrothermal converter.
[0054]
Among these, a recording head portion used in an ink jet recording method in which a liquid is ejected by thermal energy has a liquid ejection port (orifice) for ejecting a recording droplet and forming a flying droplet with a high density. , It is possible to record at a high resolution.
[0055]
In addition, a recording head using an electrothermal converter as an energy generating means can be easily made compact as a whole as compared with other recording heads, and with the recent technological advances in the semiconductor field. The advantages of IC technology and micro-machining technology, for which the reliability has been significantly improved, can be efficiently utilized.
[0056]
Further, since the recording head using the electrothermal transducer can be easily made long and planar (binary), it is easy to form a multi-nozzle or high-density mounting. In addition, in the recording head unit using the electrothermal transducer, it is possible to provide a large-volume, high-productivity, low-cost manufacturing inkjet recording head unit.
[0057]
As described above, an ink jet recording head manufactured through a semiconductor manufacturing process using an electrothermal converter as an energy generating means is generally provided with a liquid path corresponding to each ink ejection port. Then, by applying thermal energy to the liquid filling the liquid path for each of these liquid paths, the liquid is discharged from the corresponding ink discharge port.
[0058]
The recording head for the ink jet is provided with an electrothermal converter as a means for forming droplets for flying, and a liquid is supplied to each liquid path from a common liquid chamber communicating with each liquid path. It is a structure that is done.
[0059]
(Electric part)
Next, the configuration of the electrical unit in the image reading and recording apparatus according to the embodiment will be described.
[0060]
In other words, the electrical component is mainly a system control board that controls the system of the entire apparatus, a printer control board that mainly controls the printing system, a power supply unit D that supplies power to the apparatus, and an operation in which keys and LEDs of the operation panel are mounted. It is composed of a control board and the like.
[0061]
Of these, the operation control board is disposed obliquely on the front of the apparatus from the viewpoint of the operability of the apparatus as the operation unit E.
[0062]
Further, as shown in FIG. 2, all the power supply units D are arranged below the sheet feeding unit. The system control board is arranged on one side (right side in the figure) of the apparatus and between the recording unit A and the reading unit B.
[0063]
(Facsimile machine)
Next, a control configuration of the facsimile machine will be described with reference to FIG.
[0064]
As shown in FIG. 6, the control of the facsimile apparatus is configured such that the entire apparatus is controlled via a system bus 102 by a microprocessor unit (MPU) 101 for controlling the entire apparatus.
[0065]
Further, it has a ROM 103 storing a program code for operating the MPU 101, initial value data, table data, and the like, and a DRAM 104 used as an image buffer and an image memory. The DRAM 104 is used as a buffer for temporarily storing data for transmission and reception with the information processing terminal 131.
[0066]
The DRAM 104 is used as a memory for storing image data received via the communication unit 121, image data read from the reading unit 106, and image data transmitted from the information processing terminal 131 as a file. Is done.
[0067]
The SRAM 105 is used for a user registration data area, a work area, and the like. The DRAM 104 and the SRAM 105 are each configured to be protected from an accidental failure such as a power failure by a battery backup.
[0068]
The reading unit 106 (corresponding to the reading unit B in FIG. 1) includes a CS 107, a read image correction unit 108, a read image processing unit 109, a read drive unit 110, an SRAM 111, and the like.
[0069]
The reading unit 106 drives the reading driving unit 110 to drive the contact sensor, and the CS 107 optically reads the original and converts it into an electric image signal.
[0070]
The read image correcting unit 108 performs shading correction and the like on the signal, and further performs image processing by the read image processing unit 109 to output high-definition image data. Note that the SRAM 111 is used as a buffer when performing image processing.
[0071]
The inkjet recording unit 112 (corresponding to the recording unit A in FIG. 1) includes an SRAM 111, a recording image decoding unit 113, a recording image processing unit 114, a printer control microcomputer 115, a printer engine 116, a recording interface unit 117, and the like. Is configured.
[0072]
The recording image decoding unit 113 converts the run-length image data into raw image data. Further, the recording image processing unit 114 performs image processing such as resolution conversion, image scaling, smoothing, and density correction on the raw image data to convert the raw image data into high-definition image data. Also in this case, the SRAM 111 is used as a buffer for these data conversions.
[0073]
Further, the printer control microcomputer 115 includes a print control MPU that controls each operation of the ink jet type printing unit 112, a ROM that describes various instructions for performing the print control, and a unit that reads the instructions from the ROM. Processing means for processing the read instructions, a RAM capable of inputting information for storing information required by the processing means, and an output means for outputting a signal generated by the processing means. It is configured.
[0074]
The printer control microcomputer 115 inputs and outputs signals for controlling the recording of the printer engine 116. The recording interface unit 117 is an interface for cooperating between the printer control microcomputer 115 and the MPU 101.
[0075]
The operation unit 118 includes various key switches such as a numeric keypad, and is used to input an operation instruction of the apparatus and various information. The display unit 119 includes an LCD, an LED, and the like, and displays a state of the apparatus. The panel interface unit 120 is an interface for linking the MPU 101, the operation unit 118, and the display unit 119.
[0076]
The communication unit 121 includes a communication connection unit 122 such as a line connection device and a communication control unit 123 such as a modulation / demodulation device, and performs line control. Note that a communication network 124 and a telephone 125 are connected and provided to assist the communication unit 121.
[0077]
The acoustic device 126 includes a speaker or the like, and is used for notifying various states to a user of the device by sound.
[0078]
The external interface unit 127 performs data transmission and reception between the MPU 101 and the like and the information processing terminal 131, and controls the apparatus from the information processing terminal 131.
[0079]
The nonvolatile storage device 128 is a large-capacity nonvolatile memory used for storing image information and the like, and is configured so that the information is not erased even when the power is turned off.
[0080]
Further, an image encoding / decoding unit 129 for encoding and decoding image data includes an image decoding unit 129a, an image encoding unit 129b, and an internal SRAM 129c. The power supply unit 130 supplies power to the image reading and recording apparatus according to the embodiment. The information processing terminal 131 is a computer or the like connected to the outside.
[0081]
Next, each of the copy operation, facsimile reception operation, and printer operation in the image reading and recording apparatus according to the embodiment configured as described above will be specifically described below.
[0082]
(Copy operation)
First, the copy operation will be described. That is, the image information of the document read by the CS 107 of the reading unit 106 is first subjected to processing such as shading correction by the read image correction unit 108. Further, the read image processing unit 109 performs binarization and image conversion processing, and inputs the result to the image encoding unit 129b of the image encoding / decoding unit 129.
[0083]
The input image data is expanded in the internal SRAM 129c, compressed and encoded by the image encoding unit 129b, and stored in the DRAM 104. At the same time, the management information of the image data is stored in the SRAM 105.
[0084]
The encoded image data stored in the DRAM 104 is decompressed and decoded by the image decoding unit 129a of the image encoding / decoding unit 129, and is expanded as image data in the internal SRAM 129c.
[0085]
The developed image data is subjected to correction and image conversion processing by the recording image processing unit 114, and then printed out on recording paper by the printer engine 116 under the control of the printer control microcomputer 115.
[0086]
(Facsimile reception operation)
Next, the facsimile receiving operation will be described. That is, when there is an incoming call to the image reading and recording apparatus, first, the received data is input to the communication control unit 123 through the communication connection unit 122.
[0087]
Then, after the transmission and reception of the procedure signal of the facsimile communication are performed, the reception of the image data is started. The image data is demodulated in the communication control unit 123, and is transferred to the reception buffer of the DRAM 104 byte by byte under the control of the MPU 101 in response to an input interrupt signal from the communication control unit 123.
[0088]
The reception data transferred to the reception buffer is decompressed and decoded by the image decoding unit 129a of the image encoding / decoding unit 129, and after being checked for image errors, is expanded as image data in the internal SRAM 129c.
[0089]
The developed image data is subjected to correction and image conversion processing by the recording image processing unit 114, and then printed out on the recording paper S by the printer engine 116 under the control of the printer control microcomputer 115.
[0090]
(Printer operation)
Next, the operation of the printer will be described. That is, first, the command and the reception parameter are transmitted from the information processing terminal 131 to the external interface unit 127 one byte at a time.
[0091]
Thereafter, the command and the reception parameters received by the external interface unit 127 are transferred one byte at a time to the reception buffer of the DRAM 104 based on the control of the MPU 101 in accordance with the input interrupt signal from the external interface unit 127.
[0092]
This command stores a command code for identifying each command, the size of a reception parameter that follows, and the like. Further, in the reception parameters, set values and image data necessary for executing an operation corresponding to each command are stored. The MPU 101 processes the reception parameters excluding the command and the image data transferred to the reception buffer.
[0093]
Here, when the content of the reception parameter is image data, the code data or raw data constituting the image data is converted to the image decoding unit of the image encoding / decoding unit 129 according to the image data format information indicated by the reception parameter received in advance. The data is decompressed and decoded by the 129a, and is expanded as image data in the internal SRAM 129c.
[0094]
The decompressed image data is compression-encoded by the image encoding unit 129b of the image encoding / decoding unit 129 and is stored in the DRAM 104, and management information of the image data is stored in the DRAM 104.
[0095]
After receiving the command, a response to the command and a transmission parameter are generated and transmitted.
[0096]
The response includes an OK response indicating that the received command was accepted, an NG response indicating that the received command was not accepted because the received command was incorrect, and the received command at the time of reception for reasons such as operation. There is a BUSY response indicating that it is not accepted.
[0097]
The transmission parameters include the results of transmission and printing, file and page attributes, device information corresponding to the specified command, a stop request, a retransmission request, and the like.
[0098]
The response is set in the transmission buffer of the DRAM 104 by the MPU 101. Then, in accordance with the input interrupt signal from the external interface unit 127, the data is transferred to the external interface unit 127 byte by byte under the control of the MPU 101 and then transmitted to the information processing terminal 131.
[0099]
As an image reading and recording apparatus according to the embodiment, an apparatus which is connected to a CPU as a control unit to be described later and transfers image recording data created in the CPU to perform image recording can be given. Further, for example, an apparatus that reads a recorded image and then records the image, such as a copying machine, is also included.
[0100]
Further, the image reading and recording apparatus shown in FIGS. 1 and 2 shows a so-called basic type of conveying means and recording means having no means for automatically supplying and discharging the recording material.
[0101]
(Opening / closing mechanism of the reading unit)
Next, the configuration of the opening / closing mechanism of the reading unit B when replacing the ink cartridge used in the image reading / recording apparatus according to the embodiment of the present invention will be described.
[0102]
That is, the opening / closing mechanism of the reading unit B according to the embodiment includes a mechanism having a torsion bar as a first rotating unit that supplies a spring force for rotating the reading unit B upward, a joint mechanism, and a mechanism that closes the reading unit B. And a lock mechanism for locking in the locked state.
[0103]
The configuration of the lock mechanism that presses the reading unit B will be described with reference to FIGS.
[0104]
That is, as shown in FIG. 8A, the lock mechanism of the image reading and recording apparatus according to this embodiment includes a lock 31, a lock spring 32 which is a tension spring having a hook shape at both ends, and a lock for attaching the lock 31 to the middle cover 2. It comprises a sheet metal 33 and a lock shaft 34 attached to the lock sheet metal 33.
[0105]
The lock 31 has a function of holding the reading unit in a closed state, and locks the reading unit B while maintaining a right-left balance. Therefore, the hook-shaped portion 31a at the tip of the lock 31 is disposed near the front center of the device.
[0106]
A hook-shaped portion 31a is provided at the tip of the lock 31, and a round hole is formed below the hook-shaped portion 31a. The above-described lock shaft 34 is attached to the round hole, and is configured to be rotatable around the lock shaft 34 as a rotation center. The lock 31 has a round hole for hooking the hook of the lock spring 32 between the lock shaft 34 and the hook-shaped portion 31a and on the side surface of the lock 31.
[0107]
In the lock metal plate 33, a hook shape for hooking the hook of the lock spring 32 is formed at a position corresponding to the round hole. The hooks at both ends of the lock spring 32 are hooked and attached to the round hole on the side of the lock 31 and the hook portion of the lock metal plate 33.
[0108]
The lock 31 is provided with a concave recess on the side surface below the center of rotation and on the side opposite to the place where the lock spring 32 is attached.
[0109]
Further, as shown in FIG. 7, the button shaft 35 is attached to the button 36. And it is comprised so that the front-end | tip of the button shaft 35 may enter into a recessed shape. Note that the lock sheet metal 33 shown in FIG. 7 is attached to the middle cover 2 by screws.
[0110]
The reading unit B is covered with the scanner cover 8 on the side and the scanner base 43 on the bottom. A receiving metal plate 44 is mounted on the lower surface of the scanner base 43 and on the front side of the apparatus.
[0111]
The receiving plate 44 has a square hole 44a at a position corresponding to the hook-shaped portion 31a of the lock 31 described above. The state shown in FIG. 8A is the state of the lock 31 when the button 36 is not pressed.
[0112]
At this time, the hook-shaped portion 31a of the lock 31 is caught by the edge of the square hole 44a and is held in a state where the reading unit B is closed.
[0113]
When the button 36 is pressed, the button shaft 35 moves in the direction of arrow E, and the concave portion of the lock 31 is pressed.
[0114]
The lock 31 rotates about the lock shaft 34, and the hook-shaped portion 31 a is separated from the square hole 44 a of the receiving metal plate 44. FIG. 8B shows the locked state at this time.
[0115]
That is, when the hook-shaped portion 31a comes off the edge of the square hole 44a, the reading unit B is opened upward by the action of the torsion bar mechanism and the joint mechanism described later. Thereafter, when the button 36 is released, the lock 31 is rotated about the lock shaft 34 as a rotation center by the pulling force of the lock spring 32 and returns to the initial position.
[0116]
(Torsion bar mechanism)
Next, the torsion bar mechanism will be described with reference to FIG.
[0117]
That is, as shown in FIG. 9, a torsion bar generally has a structure in which one end of a straight round shaft is fixed and the other end is twisted, and a spring that utilizes a restoring force due to the torsional deformation. Consists of
[0118]
The torsion bar used in the image reading / recording apparatus according to the embodiment has a U-shape with a rounded shaft, and is an integral body of the torsion bars 51 and 52 and the arm.
[0119]
That is, the torsion bars 51 and 52 according to this embodiment are provided with the fixed arm portions 51a and 52b and the torsion arm portions 51c and 52d.
[0120]
Specifically, the torsion bars 51 and 52 are made of SWPA (piano wire) and have a round shaft torsion bar 51 having a diameter of, for example, 2.9 mm and a round shaft torsion bar having a diameter of, for example, 2.6 mm. 52.
[0121]
Further, the tip of the fixed-side arm is passed through a hole of the torsion bar support metal plate 55, whereby the left and right positions are regulated. Further, the shaft portion that generates a spring force due to the torsional deformation is placed on the middle sheet metal 54, and the upper part is regulated by the torsion bar pressing sheet metals 53a and 53b.
[0122]
These torsion bar holding metal plates 53a and 53b are attached to the middle metal plate 54 using screws. The middle metal plate 54 and the torsion bar support metal plate 55 are attached to the middle cover 2 using screws.
[0123]
That is, the left and right directions of the torsion bars 51 and 52 are regulated by the torsion bar support plate 55, and the upward direction is regulated by the torsion bar pressing plates 55a and 55b.
[0124]
In the torsion bars 51 and 52, the fixed side of the arm is disposed at the end of the image reading and recording apparatus, and the torsion side is disposed near the center of the apparatus and near the hook-shaped portion 31a of the lock 31.
[0125]
Further, when viewed from the side in a state where no force is applied to the torsion bars 51 and 52, the angle formed by the fixed-side arm portion 51a and the torsion-side arm portion 51c in the torsion bar 51 is, for example, About 70 degrees. The angle between the fixed-side arm 52a and the torsion-side arm 52c in the torsion bar 52 is set in the same manner as in the torsion bar, and specifically, is, for example, about 70 degrees.
[0126]
Further, the tips of the torsion bars 51 and 52 are inserted into holes (not shown) in the receiving plate 44. When the reading unit B is closed, the angle formed by the fixed-side arm 51a and the torsion-side arm 51c of the torsion bar 51 when viewed from the side of the apparatus is, for example, about 10 degrees. The angle between the fixed-side arm portion 52a and the torsion-side arm portion 52c in the torsion bar 52 is, for example, about 10 degrees as in the torsion bar 51.
[0127]
In addition, the torsion bars 51 and 52 are configured to generate a force corresponding to a twist angle of 60 degrees so that a force for rotating the reading unit B upward through the receiving plate 44 can be applied.
[0128]
In this embodiment, the number of the torsion bars that support the center of the reading unit B is two, that is, the torsion bars 51 and 52. However, the number of the torsion bars may be three or more.
[0129]
(Joint unit)
Next, a joint unit F as a holding unit shown in FIG. 7 will be described with reference to FIG.
[0130]
That is, the joint unit F has a function of balancing the reading unit B, a function of a stopper for preventing the reading unit B from opening too much, and a function of supporting the reading unit B in a state where the reading unit B is rotated upward. Have.
[0131]
As shown in FIG. 10, the joint unit F having the above-described functions includes a joint upper cover 61, a joint 62, a joint spring 63, and a joint lower cover 64.
[0132]
Among these, the joint spring 63 as the second rotating means is constituted by a tension coil spring having hook portions at both ends. Then, the hook on one side of the joint spring 63 is hooked on the round shaft 64 a at the rear of the joint lower cover 64, and the hook on the opposite side of the joint spring 63 is hooked on the round shaft 62 a of the joint 62.
[0133]
A round shaft 62c extends on the left and right sides of the joint 62. A rail 64c of the joint lower cover 64 is provided at a corresponding position. That is, the round shaft 62c is installed on the rail 64c, and the round shaft 62c slides on the rail 64c.
[0134]
The joint upper cover 61 is a member for regulating the upper part so that the round shaft 62c of the joint 62 does not come off the rail 64c of the joint lower cover 64.
[0135]
The rail 64c of the joint lower cover 64 is provided with a protruding portion 64d which is raised in a triangular shape. The projection 64d is a projection for holding the reading unit B from above.
[0136]
Further, a round hole 62d is formed in an upper part of the joint 62. And it is attached to the joint holder 45 attached to the lower surface of the scanner base, and is configured to be rotatable around the circular hole 62d as the center of rotation.
[0137]
FIG. 11 shows the relationship between the round shaft 62c and the rail 64c when the joint unit F is viewed from the side. FIG. 11A shows a state of the joint 62 when the reading unit B is held in an open state, and FIG. 11B shows the joint 62 when the reading unit B is closed.
[0138]
As shown in FIG. 11A, when the reading unit B is opened and held upward, the joint unit F stops at a position where the round shaft 62c that has slid on the rail 64c has climbed over the triangular protrusion 64d. And are kept. That is, the reading unit B is configured to be held open by a frictional force generated between the inclined surface of the triangular protrusion 64d and the round shaft 62c.
[0139]
Further, as shown in FIG. 11B, in the state of the joint unit F when the reading unit B is closed, the joint spring 63 (not shown in FIG. 11) is in an extended state, and the reading unit B is moved upward. A pushing force and an upward rotating force are acting.
[0140]
In the image reading and recording apparatus according to this embodiment, the torsion bar 51 is arranged so that the round shaft 62c is located forward of the triangular projection 64d with respect to the apparatus, and the reading unit B is rotated by 10 mm or more. , 52 and the spring force of the joint spring 63 are adjusted.
[0141]
(Opening / closing operation of the reading unit B)
Next, the operation when the reading unit B is opened and closed will be described. FIG. 12 shows a state where the reading unit B is opened, and FIG. 13 shows a state where the reading unit B is closed.
[0142]
First, when the user presses the button 36 (see FIG. 7) to replace the ink cartridge, the lock 31 is released from the square hole 44a of the receiving plate 44.
[0143]
When the lock 31 is released, the spring force of the torsion bars 51 and 52 and the pulling force of the joint spring 63 act, so that the round shaft 62c of the joint 62 slides on the rail 64c of the joint lower cover 64, and the reading unit B Starts to rotate upward about a shaft (not shown) at the rear of the unit.
[0144]
Thereafter, the gravity acting on the reading unit B and the spring force of the joint spring 63 and the torsion bars 51 and 52 balance, and stop when the reading unit B rotates upward by about 10 mm.
[0145]
When the user rotates the reading unit B further upward, the round shaft 62c of the joint slides further on the rail 64c and crosses the triangular protrusion 64d as shown in FIG. 11A.
[0146]
When the user removes his / her hand from the reading unit B, the reading unit B is held open by the frictional force acting between the round shaft 62c and the slope of the triangular projection 64d. Then, the upper part of the recording unit is opened, and the user can replace the ink cartridge.
[0147]
When the replacement of the ink cartridge is completed and the user applies a force to close the reading unit B, the roundness of the joint 62 becomes smaller than the frictional force between the round shaft 62c and the slope of the triangular protrusion 64d. The force for moving the shaft 62c increases. Thus, the round shaft 62c gets over the slope of the triangular projection 64d.
[0148]
As the user applies more force, the round shaft 62c slides on the rail 64c of the joint lower cover, and the reading unit B is closed.
[0149]
Further, when the reading unit B is closed, as shown in FIG. 11B, the hook-shaped portion 31a of the lock 31 is hooked on the square hole 44a of the receiving metal plate 44, and the reading unit B is locked in the closed state.
[0150]
As described above, the reading unit in the image reading and recording apparatus according to the embodiment is opened and closed, and the open state is maintained.
[0151]
Next, another example of the image reading and recording apparatus according to the embodiment will be described. FIG. 14 shows an image reading and recording apparatus according to another embodiment in which the reading unit B is provided with an automatic document separation and conveyance unit G instead of the pressure plate unit 9.
[0152]
That is, in the image reading / recording apparatus according to the other embodiment, a document loading tray 201 for loading a document bundle and a document slider 202 for regulating the width direction of the document are provided.
[0153]
Next, a description will be given of a document conveyance path in the image reading and recording apparatus. FIG. 15 shows an automatic document separation / conveyance unit G provided in an image reading / recording apparatus according to another embodiment.
[0154]
That is, as shown in FIG. 15, in this embodiment, first, the document bundle J loaded on the document loading tray 201 is transported to the separation roller 204 by the pickup roller 203.
[0155]
Further, a separation plate made of, for example, a rubber material is pressed against the separation roller 204 by a spring at a position facing the separation roller 204. Then, the document bundle J transported by the pickup roller 203 is separated from the document bundle J one by one by the action of the separation plate and the separation roller 204, and is transported to the pull-out roller 205.
[0156]
Thereafter, the document is conveyed along a guide by a pull-out roller 205 and passes through a feed roller 207. The image of the document that has passed through the feed roller 207 is read by the reading sensor 41. Subsequently, the original is carried to the paper discharge roller 209 and is discharged by the paper discharge roller 209.
[0157]
An image reading and recording apparatus having the automatic document separation and transport unit G configured as described above will be described below. FIG. 16 shows a state where the reading unit B including the automatic document separation / conveyance unit G is opened and held.
[0158]
That is, in the image reading / recording apparatus according to the other embodiment, similarly to the image reading / recording apparatus having the pressure plate unit 9 of the above-described embodiment, the center torsion bar and the joint unit located slightly to the left of the center are provided. The reading unit B is supported by F.
[0159]
Here, FIG. 17 shows a torsion bar used in the apparatus provided with the automatic document separation / conveyance unit G.
[0160]
That is, since the automatic document feeder unit G is heavier than the pressure plate unit 9 described above, a torsion bar capable of generating a strong spring force is used. In this other example, unlike the image reading and recording apparatus having the pressure plate unit 9 in the above-described embodiment, the material is SWPA (piano wire), the torsion bar 57 having a diameter of 3.2 mm, and the diameter being 3.2 mm. A torsion bar 58 using a 2.9 mm round shaft is used.
[0161]
As described above, the spring force is adjusted by using a plurality of torsion bars having a larger diameter than the torsion bars 51 and 52 used in the image reading and recording apparatus having the pressure plate unit 9. .
[0162]
Further, in the image reading and recording apparatus according to the other embodiment, two torsion bars are used. However, the technical idea of using a plurality of torsion bars having different diameters enables finer load adjustment. Become.
[0163]
Further, the tip of the arm on the fixed side is passed through a hole of the torsion bar support plate 55, and the left and right positions are regulated. Further, a shaft portion that generates a spring force due to torsional deformation is disposed on the middle sheet metal 54, and the upper part is regulated by pressing the torsion bar pressing sheets 53a and 53b from above.
[0164]
The torsion bar holding plates 53a and 53b are attached to the middle plate 54 by screws. The above-described middle sheet metal 54 and torsion bar supporting sheet metal 55 are also attached to the middle cover 2 by screws.
[0165]
The left and right directions of the torsion bars 51 and 52 are regulated by the torsion bar support plate 55, and the upward direction is regulated by the torsion bar pressing plates 55a and 55b. The basic configuration of the torsion bars 51 and 52 described above is the same as that of the embodiment using the pressure plate unit 9.
[0166]
FIG. 18A shows the tip shape K of the arm on the movable side of the torsion bar used in the image reading and recording apparatus provided with the automatic document separation and transport unit G according to this embodiment. FIG. 18B shows the tip shape L of the arm on the movable side of the torsion bar, which is used in an apparatus of the type provided with the pressure plate unit 9 according to the above-described embodiment.
[0167]
As shown in FIG. 18A, the tip shape L of the torsion bar used in the image reading and recording apparatus having the pressure plate unit 9 is such that a part of the tip of the torsion bar 52 on the torsion side is bent at 90 °, and the bent portion is formed. It has a rectangular shape in which the more distal end portion is further bent by 90 °. Further, the tip of the torsion bar 51 is provided outside the tip of the torsion bar 52 described above, and has a semicircular shape.
[0168]
On the other hand, regarding the tip shape K of the torsion bar used in the image reading and recording apparatus having the automatic document separation / conveyance unit G according to the present embodiment, the tip of one torsion bar 58 has a portion near the tip of approximately 90%. °, the other torsion bar 57 is outside the tip of one torsion bar 58, and the tip shape K of the torsion bar moves the tip of the movable side of the torsion bar approximately 90 °. It has a square shape bent twice.
[0169]
As described above, the tip shape of the torsion bar used in the image reading and recording apparatus of the automatic separation and transport unit type and the tip shape of the torsion bar used in the image reading and recording apparatus of the pressure plate unit type are different from each other, At the time of assembling the image reading and recording apparatus, it is possible to easily confirm whether the torsion bar of the pressure plate unit type or the automatic separation conveyance unit type should be used. In the image reading and recording apparatus according to the present invention, the torsion bar is mounted on the middle cover 2 at the time of assembling the product, and then the reading unit is mounted.
[0170]
Here, a state in which the torsion bar is attached to the middle cover 2 is shown in FIG. As shown in FIG. 19, at the stage before mounting the reading unit, the shape L of the tip of the torsion bar is checked to determine whether the type of the torsion bar to be mounted is wrong or not. , The pressure plate unit, and whether it is wrong can be checked very easily.
[0171]
In addition, a repair technician such as a service technician may perform repair or part replacement as needed. At this time, since the tip shape of the torsion bar when the reading unit is removed can be easily checked, the type of the torsion bar to be used can be easily checked, and the possibility of a wrong combination of the torsion bar can be confirmed. Can be greatly reduced.
[0172]
In addition, the tip of the torsion bar to be attached to the image reading and recording device of the pressure plate unit type should be distinguished from a square shape, and the tip of the torsion bar to be attached to the automatic document separation and transport unit type should be distinguished from a semicircle. Accordingly, it is possible to reduce the possibility of assembling with a torsion bar attached to each unit type. Here, an example of the shape of the tip of the torsion bar is shown in FIG.
[0173]
As shown in FIG. 20A, when the shape of the tip is substantially semicircular and three or more torsion bars are used, the radius of the tip of the second torsion bar in the semicircular shape is larger than the radius of the first torsion bar. The radius of the tip of the third torsion bar in the semicircular shape is larger than the radius of the second torsion bar, and the radius of the tip of the fourth torsion bar in the semicircular shape is greater than the radius of the third torsion bar. By sequentially adopting, even when the number of torsion bars is increased, it is possible to determine the assembling position of the torsion bar based on the radius of the semicircular shape at the tip. Thereby, errors in assembling order and torsion bar type can be reduced.
[0174]
Note that this is the same even when the tip is square. That is, when three or more torsion bars are used in one image reading and recording apparatus, the bending length (for example, the length of one side) of the tip of the second torsion bar is made larger than that of the first torsion bar, and By sequentially adopting a configuration in which the bending length of the tip of the torsion bar is longer than that of the second torsion bar and the bending length of the tip of the fourth torsion bar is longer than that of the third torsion bar, Even when the number of torsion bars used in the image reading and recording apparatus is increased, it is possible to easily determine the assembly position of a predetermined torsion bar by comparing the size of the tip. For this reason, it is possible to reduce the order of assembling the torsion bars in the image reading and recording apparatus and the mistake of the type of the torsion bar.
[0175]
As described above, one embodiment of the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible.
[0176]
For example, the numerical values given in the above-described embodiment are merely examples, and different numerical values may be used as needed.
[0177]
In the above-described embodiment, a multifunction peripheral has been described as an example of the configuration of the image forming apparatus. However, the present invention is not necessarily limited to this, and a pressure plate unit such as a printer, a facsimile, a monochrome copying machine, and a full-color copying machine may be used. And any apparatus having an automatic document separation / conveyance unit.
[0178]
In addition, the present invention is not limited to the above-described embodiment, but includes the following technical ideas and encompasses all combinations of these technical ideas.
[0179]
[First embodiment]
The image reading and recording apparatus according to the first embodiment includes:
It has a recording unit for recording an image, and a reading unit for reading the image, and the reading unit is arranged above the recording unit, and a shaft is provided at an end of the reading unit. A rotating device for rotating the reading device upward, the rotating device comprising: a first rotating device including a plurality of torsion bars disposed substantially at the center of the reading device; and a vicinity of a center of gravity of the reading device. And a plurality of torsion bars, which are the first rotating means, have a curved shape.
An image reading and recording apparatus characterized in that:
[0180]
[Second embodiment]
The image reading and recording apparatus according to the second embodiment includes:
It has a recording unit for recording an image, and a reading unit for reading the image, and the reading unit is arranged above the recording unit, and a shaft is provided at an end of the reading unit. A rotating device for rotating the reading device upward, the rotating device comprising: a first rotating device including a plurality of torsion bars disposed substantially at the center of the reading device; and a vicinity of a center of gravity of the reading device. , The tip of each torsion bar of the plurality of torsion bars as the first rotating means has a square bent shape.
An image reading and recording apparatus characterized in that:
[0181]
[Third embodiment]
In the image reading and recording apparatus according to the third embodiment of the present invention, typically, the tip of the plurality of torsion bars as the first rotating means has a square shape having at least one angle of 90 °. It is.
[0182]
[Fourth embodiment]
The number of corner points in each torsion bar is preferably one or two.
[0183]
[Fifth embodiment]
The image reading and recording apparatus according to the fifth embodiment of the present invention is preferably configured such that, in a plurality of torsion bars constituting the first rotating means, the size of the tip shape of each torsion bar is determined for each torsion bar. Are configured to be different from each other.
[0184]
With such a configuration, the assembling position of the torsion bar can be determined based on the size of the tip of the torsion bar, so that it is possible to prevent mistakes in the order of assembly and the type of the torsion bar.
[0185]
[Sixth embodiment]
In the image reading and recording apparatus according to the sixth embodiment of the present invention, typically, the reading means includes a flatbed scanner.
[0186]
[Seventh embodiment]
In the image reading / recording apparatus according to the seventh embodiment of the present invention, preferably, the above-mentioned second rotating means comprises a torsion coil spring.
[0187]
[Eighth embodiment]
The image reading and recording apparatus according to the eighth embodiment of the present invention is typically configured such that the reading means has document pressing means for pressing the document so that the document does not float.
[0188]
[Ninth embodiment]
The image reading and recording apparatus according to the ninth embodiment of the present invention is preferably configured such that the reading means has an automatic document separating and conveying means.
[0189]
[Tenth embodiment]
An image reading / recording apparatus according to a tenth embodiment of the present invention preferably includes a first image reading / recording apparatus having document pressing means and a second image reading / recording apparatus having automatic document separating / conveying means, The tip shape of the torsion bar provided in the first image reading / recording device and the tip shape of the torsion bar provided in the second image reading / recording device are different from each other.
[0190]
【The invention's effect】
As described above, according to the present invention, the reading unit is disposed above the recording unit, and the reading unit is configured to be rotatable around the axis disposed at the rear end of the reading unit. In an apparatus having a rotating unit for rotating the reading unit upward to open the recording unit upward, a plurality of torsion bars for supplying a force for rotating the reading unit upward are arranged near the center of the reading unit. This makes it possible to set a fine spring force, and to support a large load by using a plurality of torsion bars, even if an apparatus having an automatic document feed separation unit is used as the reading means. . Therefore, in the multifunction device of the automatic document separation / conveyance unit type and the multifunction device of the pressure plate unit type, the rotating power of the torsion bar used in the reading unit rotating mechanism for rotating each reading unit upward is applied to each unit. It can be adjusted to an appropriate value. Further, by setting the tip shape of the torsion bar used in the press plate type multifunction device and the tip shape of the torsion bar used in the automatic document separation / conveyance unit type multifunction device to be different from each other, the different types of multifunction devices Can be prevented from being assembled.
[0191]
Further, according to the present invention, the second rotating means is arranged as a member for supplying a force for rotating the reading means upward, so that the restoring force of the second rotating means is adjusted, so that a finer load can be obtained. Can be adjusted.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an image reading and recording apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an image reading and recording apparatus according to one embodiment of the present invention.
FIG. 3 is a perspective view showing a state in which a pressure plate unit is opened in the image reading and recording apparatus according to the embodiment of the present invention;
FIG. 4 is a perspective view showing a state where a reading unit is opened in the image reading and recording apparatus according to the embodiment of the present invention;
FIG. 5 is a perspective view showing a state where an ink cartridge is set in the image reading and recording apparatus according to the embodiment of the present invention;
FIG. 6 is a control block diagram for controlling the image reading and recording apparatus according to the embodiment of the present invention.
FIG. 7 is a perspective view showing a state where a reading unit is opened in the image reading and recording apparatus according to the embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a lock mechanism in the image reading and recording apparatus according to the embodiment of the present invention.
FIG. 9 is a perspective view showing a torsion bar mechanism in the image reading and recording apparatus according to one embodiment of the present invention.
FIG. 10 is a schematic diagram illustrating a joint mechanism in the image reading and recording apparatus according to the embodiment of the present invention.
FIG. 11 is a schematic diagram illustrating an operation of a joint mechanism in the image reading and recording apparatus according to the embodiment of the present invention.
FIG. 12 is a sectional view showing a state in which the reading unit is opened and held in the image reading and recording apparatus according to the embodiment of the present invention;
FIG. 13 is a sectional view showing a state in which a reading unit in the image reading and recording apparatus according to the embodiment of the present invention is closed.
FIG. 14 is a perspective view showing an apparatus in which an automatic document separation and conveyance unit is provided in a reading unit in the image reading and recording apparatus according to one embodiment of the present invention.
FIG. 15 is a sectional view showing an automatic document separation / conveyance unit in the image reading / recording apparatus according to one embodiment of the present invention.
FIG. 16 is a perspective view showing a state in which a reading unit having an automatic document separation / conveyance unit is opened in the image reading / recording apparatus according to the embodiment of the present invention;
FIG. 17 is a schematic diagram illustrating a torsion bar mechanism of a reading unit having an automatic document separation / conveyance unit in the image reading / recording apparatus according to the embodiment of the present invention;
FIG. 18 is a schematic diagram illustrating a tip of a torsion bar in the image reading and recording apparatus according to the embodiment of the present invention.
FIG. 19 is a perspective view showing a state where a reading unit is removed from the image reading and recording apparatus according to the embodiment of the present invention;
FIG. 20 is a schematic diagram illustrating a tip of a torsion bar in the image reading and recording apparatus according to the embodiment of the present invention;
[Explanation of symbols]
1 rear cover
2 Middle cover
3 Bottom cover
4a Front cover left
4b Front cover right
5 Recording paper output tray
6 Lower cover
7 Operation panel
8 Scanner cover
9 Pressure plate unit
10 Recording paper cover
22 Ink Tank (Black)
23 Ink Tank (Cyan)
24 Ink Tank (Magenta)
25 Ink tank (yellow)
26 Auto sheet feeder
27 Slider
31 Lock
32 lock spring
33 Lock sheet metal
34 Lock shaft
35 Button axis
36 buttons
41 Image reading sensor
43 Scanner Base
44 Receiving sheet metal
51,52 torsion bar
53 Torsion bar presser sheet metal
54 Middle sheet metal
55 Torsion bar support sheet metal
61 Joint upper cover
62 joint
63 Joint spring
64 Joint lower cover
201 Document loading tray
202 Document slider
203 Pickup roller
204 separation roller
205 Pull-out roller
207 feed roller
209 Paper ejection roller
A Recording unit
B reading unit
C operation unit
D Power supply unit
F joint unit
G Automatic Document Separation and Conveyance Unit
J manuscript

Claims (10)

An image reading and recording apparatus having a recording unit for recording an image and a reading unit for reading an image, wherein the reading unit is disposed above the recording unit and has a shaft at an end,
The reading means is configured to be rotatable about the axis as a rotation center,
A rotating means for rotating the reading means upward has a first rotating means comprising a plurality of torsion bars arranged substantially at the center of the reading means and a restoring force arranged near the center of gravity of the reading means. And a second rotating means,
An image reading and recording apparatus, wherein the tips of the plurality of torsion bars as the first rotating means have a curved shape. An image reading and recording apparatus having a recording unit for recording an image and a reading unit for reading an image, wherein the reading unit is disposed above the recording unit and has a shaft at an end,
The reading means is configured to be rotatable about the axis as a rotation center,
A rotating means for rotating the reading means upward has a first rotating means comprising a plurality of torsion bars arranged substantially at the center of the reading means and a restoring force arranged near the center of gravity of the reading means. And a second rotating means,
An image reading and recording apparatus, wherein the tips of the plurality of torsion bars as the first rotating means have a rectangular shape. 3. The image reading and recording apparatus according to claim 2, wherein tips of the plurality of torsion bars serving as the first rotating means have a square shape including at least one angle of 90 degrees. 4. The image reading and recording apparatus according to claim 3, wherein the corners of the plurality of torsion bars are one or two. 2. The plurality of torsion bars constituting the first rotating means, wherein the size of the tip shape of each of the torsion bars is different for each torsion bar. 3. 5. The image reading and recording apparatus according to any one of claims 1 to 4. 6. The image reading and recording apparatus according to claim 1, wherein said reading means includes a flatbed scanner. 7. The image reading and recording apparatus according to claim 1, wherein said second rotating means comprises a torsion coil spring. 8. The image reading and recording apparatus according to claim 1, wherein the reading unit includes a document pressing unit that presses a document. 8. The image reading and recording apparatus according to claim 1, wherein said reading means includes an automatic document separating and conveying means. A first image reading and recording apparatus, wherein the reading means has a document pressing means for pressing a document, and a second image reading and recording apparatus, wherein the reading means has an automatic document separating and conveying means The tip shape of the torsion bar provided in the first image reading / recording device and the tip shape of the torsion bar provided in the second image reading / recording device are different from each other. The image reading and recording apparatus according to claim 1.

Images