JP2013216075A - Recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording apparatus including a tilt device which is more strongly retained in a closing direction and is opened by smaller force by reducing a return amount in the closing direction when it is opened.SOLUTION: A clutch 38 retains an angle of an operation panel 12. A gear 33, a gear 34, a shaft 35, gears 36-1 and 36-2, and a gear train 37 transmit power between the operation panel 12 and the clutch 38. The gear 33, gear 34, shaft 35, gears 36-1 and 36-2, and gear train 37 are configured to increase a speed when power is transmitted from the operation panel 12 to the clutch 38, and reduce a speed when power is transmitted from the clutch 38 to the operation panel 12. A one-way clutch, which disconnects transmission of power when the operation panel 12 rotates in an opening direction and transmits power when the operation panel 12 rotates in a closing direction, is arranged on the gear train 37.

Description

The present invention relates to a recording apparatus, and more particularly to a recording apparatus including a tilt unit.
The recording apparatus includes apparatuses such as an ink jet printer, a copying machine, and a facsimile.

  In recent years, in order to improve usability, printers having an operation panel that can be tilted have been provided. In this printer, the attitude of the operation panel is maintained using a torque limiter.

  In addition, a magnet is provided on the rotating shaft of the display unit, a metal piece is provided at a position facing the shaft end surface of the rotating shaft, and the rotating shaft is allowed to move slightly in the axial direction. The magnet provided at the shaft end of the rotating shaft is attracted and attracted to the metal piece by its magnetic force, so that the frictional force between the magnet and the metal piece becomes the friction torque, and the display unit is in any posture There is also one that is held by (see, for example, Patent Document 1).

JP 2009-71213 A

  However, in the conventional configuration, the same force is required when opening and closing the operation panel, and the operation panel is opened when the force for holding the operation panel is increased in order to maintain the posture of the operation panel reliably. However, great power is required. Conversely, if the operation panel is opened with a small force, the operation panel is closed only by operating the operation panel. As another problem, if a gear is provided between the part that generates the friction torque and the operation panel, the operation panel may return to the closing direction due to gear backlash or the like.

  As another problem, the teeth of the gear wheel train for deceleration are deflected by the load of the torque limiter, so-called springback occurs, and the operation panel cannot be stopped at a desired angle.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to obtain a recording apparatus including a tilt portion that can be held stronger in the closing direction and can be opened with a smaller force. In addition, the present invention provides a recording apparatus that can further reduce the amount of return in the closing direction when opened, or the spring back can be opened and the operation panel can be moved from a desired angle by the spring back. An object of the present invention is to obtain a recording apparatus that can suppress this.

  A recording apparatus according to a first aspect of the present invention for solving the above problem includes a rotatable tilt portion, a holding mechanism for holding an angle of the tilt portion, and between the tilt portion and the holding mechanism. A transmission mechanism for transmitting power, wherein the transmission mechanism cuts off the transmission of power to the holding mechanism when rotating the tilt portion in the upward direction, and transmits the power when rotating the tilt portion in the downward direction. A one-way clutch that transmits power to the holding mechanism is provided.

  According to this aspect, the transmission of power to the holding mechanism is cut off by the one-way clutch when the tilt portion is rotated in the upward direction, and power is transmitted to the holding mechanism when the tilt portion is rotated in the upward direction. Therefore, even if the holding force by the holding mechanism is increased in order to hold the angle of the tilt part more reliably, the tilt part can be turned upward with a smaller torque.

According to a second aspect of the present invention, in the first aspect, the holding mechanism generates a frictional force by an urging means, and holds the angle of the tilt portion by the frictional force.
According to this aspect, since the holding mechanism generates a frictional force by the urging means and holds the angle of the tilt portion by the frictional force, the structure of the holding mechanism is simplified and the cost is low. Can do.

  The recording apparatus according to a third aspect of the present invention is characterized in that, in the first aspect, the holding mechanism generates a frictional force by a magnetic force and holds the angle of the tilt portion by the frictional force. According to this aspect, the holding mechanism can be further downsized, and the number of torque adjustment parameters can be increased.

  The recording apparatus according to a fourth aspect of the present invention is characterized in that, in any of the first to third aspects, the one-way clutch is provided in the immediate vicinity of the holding mechanism. According to this aspect, the angle of the tilt portion can be held more reliably by being provided in the immediate vicinity of the holding mechanism that is most accelerated when power is transmitted from the tilt portion side to the holding mechanism side.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the transmission mechanism increases speed when transmitting power from the tilt portion side to the holding mechanism side, and from the holding mechanism side. A gear group is provided that decelerates when power is transmitted to the tilt portion side.

  According to this aspect, the speed is increased when power is transmitted from the tilt unit side to the holding mechanism side, and the speed is decreased when power is transmitted from the holding mechanism side to the tilt unit side. When the hand is lifted and turned, and the hand is released, the return of the tilting part due to the backlash can be reduced by the above speed increasing action. Further, even when a downward force is applied to the tilt portion when operating the tilt portion, the holding action of the holding mechanism is amplified by the speed increasing side action, and the tilt angle can be reliably held. . In addition, when the tilt part is driven by a motor or the like, the tilt part can be rotated with a small torque by the action of the deceleration.

  The recording apparatus according to a sixth aspect of the present invention is the recording apparatus according to any one of the first to fifth aspects, wherein the tilt portion is powered between the transmission mechanism on both sides of the portion attached to the main body of the recording apparatus. Is transmitted. According to this aspect, it is possible to prevent the tilt portion from being tilted with respect to the main body, and it is possible to reduce rattling.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the transmission mechanism includes a flywheel.
According to this aspect, since the transmission mechanism has the flywheel, the kinetic energy stored in the flywheel releases the deflection of the transmission mechanism, can suppress the springback, and the tilt portion is displaced from a desired angle. Can be suppressed.

According to an eighth aspect of the present invention, in any one of the first to sixth aspects, the holding mechanism includes a flywheel.
According to this aspect, since the flywheel is included in the holding mechanism, the bending of the transmission mechanism is released by the kinetic energy stored in the flywheel, the spring back can be suppressed, and the tilt portion has a desired angle. Can be suppressed from being displaced. In addition, the flywheel can be arranged in a space-saving manner by using the flywheel as a constituent member of the holding mechanism.

  A recording apparatus according to a ninth aspect of the present invention is characterized in that, in any one of the first to eighth aspects, the tilt unit is an operation panel that constitutes an operation unit of the recording apparatus. According to this aspect, the operation panel can be operated more reliably.

FIG. 2 is a perspective view illustrating an appearance of a printer according to the present invention with an operation panel closed. FIG. 2 is a perspective view illustrating an appearance of a printer according to the present invention in which an operation panel is opened. It is a figure which shows the structure of the mechanism which tilts an operation panel. It is a perspective view which shows the detail of a structure of a transmission mechanism. It is a perspective view which shows the structure of a clutch. It is an exploded view which shows the structure of a clutch. It is a figure which shows the structure of the mechanism which tilts an operation panel. It is a perspective view which shows the detail of a structure of a transmission mechanism. It is a perspective view which shows the detail of a structure of a transmission mechanism. It is a perspective view which shows the structure of a clutch. It is an exploded view which shows the structure of a clutch. It is a perspective view which shows the detail of a structure of the clutch and tooth wheel row | line | column to which the function as a flywheel is provided. 2 is a perspective view showing a configuration of a clutch 111. FIG. 2 is an exploded view showing a configuration of a clutch 111. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are perspective views showing an appearance of a printer 1 as an example of an embodiment of the present invention. FIG. 1 is a perspective view showing the appearance of the printer 1 according to an embodiment of the present invention with the operation panel closed, and FIG. 2 is a perspective view showing the appearance of the printer 1 with the operation panel opened. .

  The printer 1 is a printing apparatus that is an example of a recording apparatus, and records on a sheet that is an example of a recording medium. The main body 11 of the printer 1 is provided with an operation panel 12 operated by a user. The main body 11 controls the entire conveyance unit (not shown) that conveys the sheet, the recording head 22 that draws characters or images on the sheet with ink or the like, and the carriage 20 that includes the recording head 22 and an ink cartridge (not illustrated). A control unit (not shown) and the like are stored in the housing. The user is not limited to the end user, but means all persons who handle the printer 1 such as a person who performs assembly work or after-maintenance of the printer 1.

  Hereinafter, of the side surfaces of the printer 1, the side surface on which the operation panel 12 is provided is referred to as the front side, and the front side is also referred to as the front side. Hereinafter, of the side surfaces of the printer 1, the side facing the side surface on which the operation panel 12 is provided is referred to as a back surface, and the back surface side is also referred to as the back. Further, the left side in FIGS. 1 and 2 is simply referred to as the left side, and the right side in FIGS. 1 and 2 is simply referred to as the right side.

  Hereinafter, the operation panel 12 will be described. The operation panel 12 is a panel operated by a user. The operation panel 12 is an example of a tilt unit, and can be tilted (tilted) with respect to the main body 11. The operation panel 12 is formed of various resins or metals. The operation panel 12 is provided with a display unit including an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, and an input unit including buttons pressed by the user.

  As shown in FIG. 1, the operation panel 12 rotates to the limit in the downward direction, and when it is closed, the surface of the main body 11 and the surface of the operation panel 12 are substantially flush with each other. Further, as shown in FIG. 2, the operation panel 12 can be rotated and opened to the limit in the upward direction until it is substantially parallel to the top plate of the main body 11. Note that the operation panel 12 can be held in an arbitrary inclination state in the middle from the closed state to being substantially parallel to the top plate of the main body 11.

■■■■■ First Embodiment ■■■■■
3 and 4 are diagrams showing the configuration of the transmission mechanism 20. The operation panel 12 is pivotally supported by a frame 31 provided in the main body 11 so as to be rotatable. That is, the right end and the left end of the operation panel 12 are pivotally supported by the frame 31. The sector gears 32-1 and 32-2 are so-called sector gears provided on the operation panel 12. The sector gears 32-1 and 32-2 are coaxial with the shaft supported by the frame 31. The sector gears 32-1 and 32-2 are provided at the right end and the left end of the operation panel 12, respectively.

  The frame 31 is provided with a gear 33, a gear 34, a shaft 35, gears 36-1 and 36-2, a toothed wheel train 37, a clutch 21, and a motor 41. The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, the toothed wheel train 37, and the one-way clutch 57 constitute a transmission mechanism 20 that transmits power between the operation panel 12 and the clutch 21. To do. The gear 33, the gear 34, and the gears 36-1 and 36-2 are spur gears.

  The gear 33 meshes with the sector gear 32-1, and the gear 34 meshes with the sector gear 32-2. The shaft 35 is rotatably supported on the frame 31. A gear 36-1 is provided at the right end of the shaft 35, and a gear 36-2 is provided at the left end of the shaft 35. The gear 36-1 meshes with the gear 33, and the gear 36-2 meshes with the gear 34. Furthermore, the gear 36-1 meshes with the tooth wheel train 37.

  That is, when the operation panel 12 is tilted (when the operation panel 12 is opened or closed), the sector gears 32-1 and 32-2 provided on the operation panel 12 rotate, so that the sector gear 32- 1 and the gear 34 engaged with the sector gear 32-2 rotate. Further, the gear 36-1 that meshes with the gear 33 and the gear 36-2 that meshes with the gear 34 rotate together with the shaft 35. The gear 36-1 transmits the rotational force generated by tilting the operation panel 12 to the toothed wheel train 37.

  The tooth wheel train 37 is composed of a tooth wheel train of compound gears. FIG. 4 is a diagram showing details of the configuration of the tooth wheel train 37, and is a perspective view of the tooth wheel train 37 seen from the back side. The toothed wheel train 37 includes a gear 51, a gear 52, a gear 53, a gear 54, a gear 55, and a gear 56.

  The gear 51 meshes with the gear 36-1 and is provided coaxially with the gear 52 and rotates together with the gear 52. The pitch circle diameter of the gear 51 is smaller than the pitch circle diameter of the gear 52. The gear 53 meshes with the gear 52 and is provided coaxially with the gear 54 and rotates together with the gear 54. The pitch circle diameter of the gear 53 is smaller than the pitch circle diameter of the gear 54. The gear 55 meshes with the gear 54 and is provided coaxially with the gear 56 and rotates together with the gear 56. The pitch circle diameter of the gear 55 is smaller than the pitch circle diameter of the gear 56. For example, the reduction ratio of the tooth wheel train 37 is set so that the rotation ratio between the operation panel 12 and the gear 58 (described later) is 1:50 in this embodiment.

  The one-way clutch 57 is a sprag-type or cam-type one-way clutch. When the operation panel 12 rotates in the downward direction, a rotational force (power) is transmitted to the gear 23 provided in the clutch 21 and the operation panel 12 is operated. When 12 rotates in the upward direction, transmission of rotational force (power) to the gear 23 is cut off. A more detailed configuration of the one-way clutch 57 will be described in a second embodiment to be described later with reference to FIG.

  The clutch 21 is an example of a holding mechanism. The clutch 21 is a spring type friction clutch using a spring which is an example of an urging means. That is, the clutch 21 generates a frictional force by an urging force. The configuration of the clutch 21 will be described with reference to FIGS. FIG. 5 is a perspective view showing the configuration of the clutch 21. FIG. 6 is an exploded view showing the configuration of the clutch 21. The clutch 21 includes a rotating disk 22, a coil spring 24, a fixed disk 25, and a stopper 26.

  The fixed disk 25 is made of, for example, a metal material and is fixed to the main body 11 with screws or the like. The rotating disk 22 is formed in a disk shape from, for example, a metal material, and is formed integrally with the cylindrical portion 22 a and the gear 23. The coil spring 24 is loosely inserted into the cylindrical portion 22 a and urges the rotary disk 22 toward the fixed disk 25. As a result, the rotating disk 22 is pressed against the rotating disk 22 by the coil spring 24, and a frictional force is generated between the rotating disk 22 and the fixed disk 25.

  Note that a plurality of (four in this embodiment) holes 22b are formed along the circumferential direction in a portion where the cylindrical portion 22a rises in the rotary disk 22, and two hooks 26a and two provided in the stopper 26 are formed. The tongue piece 26b is configured to enter the hole 22b, whereby the rotating disk 22 and the stopper 26 are configured to rotate together. Further, the hook 26 a has a function of hooking the coil spring 24 as shown in FIG. 5, whereby the urging force (restoring force) of the coil spring 24 which is a compression coil spring acts between the hook 26 a and the rotating disk 22. It is supposed to do.

  As described above, the frictional force generated in the clutch 21 causes the toothed wheel train 37, the gears 36-1 and 36-2, the shaft 35, the gear 34, and the gear 33 to be substantially parallel to the top plate of the main body 11. The operation panel 12 (tilt state) that is opened until it is halfway, opened halfway, or closed is held. The holding force, that is, the frictional force of the clutch 21 is set so that the operation panel 12 does not rotate downward even when a button pressing force is applied to the operation panel 12.

  Note that the motor 41 shown in FIG. 3 generates a rotational driving force. The rotational driving force of the motor 41 rotates the shaft 35 via a toothed wheel train (not shown), thereby rotating the gears 36-1 and 36-2, the gear 33, and the gear 34, and the sector gear 32-1. And 32-2 are rotated to open the operation panel 12 (rotate upward).

  Thus, the clutch 21 maintains the angle of the operation panel 12. The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 transmit power between the operation panel 12 and the clutch 21. The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 are accelerated when power is transmitted from the operation panel 12 to the clutch 21, and power is transmitted from the clutch 21 to the operation panel 12. When transmitting, it has the structure which decelerates. The tooth wheel train 37 is provided with a one-way clutch 57 that cuts off power transmission when the operation panel 12 is rotated in the opening direction and transmits power when the operation panel 12 is rotated in the closing direction.

  The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 increase in speed when power is transmitted from the operation panel 12 to the clutch 21, and power is transmitted from the clutch 21 to the operation panel 12. When transmitting, the one-way clutch 57 stops transmitting power when the operation panel 12 is rotated in the opening direction, and transmits power when the operation panel 12 is rotated in the closing direction. When the hand 12 is lifted and turned upward and released, the return of the operation panel 12 due to the backlash of the gear can be reduced by the above speed increasing action.

  Further, even when a downward force is applied to the operation panel 12 when operating the operation panel 12, the above-mentioned speed-up action amplifies the holding action at the clutch 21, and the operation panel 12 tilts. The corner can be held securely. In addition, when the operation panel 12 is driven by the motor 41, the operation panel 12 can be rotated with a small torque by the action of the deceleration, and the torque of the clutch 21 is applied to the motor 41 by the one-way clutch 57. Therefore, the operation panel 12 can be rotated with a much smaller torque.

  That is, the torque that pushes down the operation panel 12 is set larger than the torque that pushes up the operation panel 12. More specifically, the torque that pushes down the operation panel 12 is set to be larger than the torque generated by the force that presses a button or the like that is an input unit provided on the operation panel 12.

  Even if the toothed wheel train 37 does not have the above speeding up and slowing down operations, the one-way clutch 57 can be used to drive the clutch 21 when the operation panel 12 is driven by the motor 41 (when turning up). Since no torque is applied to the motor 41, the operation panel 12 can be rotated with a small torque.

  Further, since the clutch 21 generates a frictional force by the biasing force of the coil spring 24 as the biasing means, the structure can be simplified. In particular, in this embodiment, the coil spring 24 biases the rotating disk 22 along the direction of the rotation axis of the rotating disk 22, so that variation in biasing force, that is, variation in holding force of the clutch 21 can be suppressed.

  Further, since the one-way clutch 57 is provided in the immediate vicinity of the clutch 21, the tilt angle is provided by being provided in the immediate vicinity of the clutch 21 that is most accelerated when power is transmitted from the operation panel 12 side to the clutch 21 side. Can be held more reliably.

  Furthermore, the operation panel 12 is powered between the gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 on both sides of the portion attached to the main body 11. To communicate. Thereby, it can prevent that the operation panel 12 inclines with respect to the main body 11, and can reduce shakiness more.

  As described above, when the operation panel 12 is opened, the return amount of the operation panel 12 due to backlash or the like can be further reduced. By using the one-way clutch 57 and the clutch 21, the operation panel 12 can be held with a predetermined torque when the operation panel 12 is opened and lightly when the operation panel 12 is closed.

■■■■■ Second Embodiment ■■■■■
7 to 9 are diagrams illustrating a configuration of the transmission mechanism 30 according to the second embodiment. 7 to 9, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the repeated description will be omitted as appropriate. The transmission mechanism 30 includes the toothed wheel train 37 and the one-way clutch 57, as in the first embodiment described above, and these are shown in FIGS.
In the following, first, a supplementary description of the one-way clutch 57 will be given.

  The one-way clutch 57 is a sprag-type or cam-type one-way clutch, and transmits a rotational force (power) when rotating counterclockwise in FIG. 9, that is, when the operation panel 12 rotates downward. When rotating clockwise in FIG. 9, that is, when the operation panel 12 rotates upward, transmission of rotational force (power) is cut off.

  The inner ring 71 of the one-way clutch 57 is formed so as to protrude toward the gear 54, and the outside of the protruding portion is formed as a gear. A portion of the inner ring 71 formed as a gear meshes with the gear 56. The outer ring 72 of the one-way clutch 57 is formed as a gear on the outer side. An outer ring 72 as a gear meshes with a gear 58 provided in the clutch 38. The above is the configuration of the one-way clutch 57.

  Next, the present embodiment is different from the first embodiment described above in the clutch 38. The clutch 38 is an example of a holding mechanism. The clutch 38 is a magnet type friction clutch. That is, the clutch 38 generates a frictional force by a magnetic force. The configuration of the clutch 38 will be described with reference to FIGS. 10 and 11. FIG. 10 is a perspective view showing the configuration of the clutch 38. FIG. 11 is an exploded view showing the configuration of the clutch 38. The clutch 38 includes a rotating disk 91, a magnet 92, a fixed disk 93, and a double-sided tape 94.

  The rotating disk 91 is formed in a disk shape from a non-magnetic material and is formed integrally with a cylindrical gear 58. The rotating disk 91 is pressed against the fixed disk 93 to generate a frictional force. The magnet 92 is formed in a ring shape. The diameter of the hole inside the magnet 92 is larger than the diameter of the tip of the gear 58, and the outer diameter of the magnet 92 is smaller than the outer diameter of the rotating disk 91. A hole inside the magnet 92 is passed through the gear 58, and the magnet 92 is adhered to the rotating disk 91 by a double-sided tape 94 between the magnet 92 and the rotating disk 91.

  The fixed disk 93 is made of a magnetic material, such as metal, and is fixed to the main body 11 with screws or the like. As shown in FIGS. 10 and 11, the rotating disk 91 is disposed so as to be sandwiched between the magnet 92 and the fixed disk 93. The magnet 92 presses the rotating disk 91 against the fixed disk 93 by a magnetic force generated between the magnet 92 and the fixed disk 93 that is a magnetic body. Thereby, a frictional force is generated between the rotating disk 91 and the fixed disk 93.

  The frictional force generated in the clutch 38 is opened until it is substantially parallel to the top plate of the main body 11 via the toothed wheel train 37, the gears 36-1 and 36-2, the shaft 35, the gear 34, and the gear 33. The operation panel 12 (tilted state) that is open, partially open, or closed is held. The holding force is set so that the operation panel 12 does not rotate downward even when a button pressing force is applied to the operation panel 12.

  Note that the motor 41 shown in FIG. 7 generates a rotational driving force. The rotational driving force of the motor 41 rotates the shaft 35 via a toothed wheel train (not shown), thereby rotating the gears 36-1 and 36-2, the gear 33, and the gear 34, and the sector gear 32-1. And 32-2 are rotated to open the operation panel 12 (rotate upward).

  Thus, the clutch 38 maintains the angle of the operation panel 12. The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 transmit power between the operation panel 12 and the clutch 38. The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 are accelerated when power is transmitted from the operation panel 12 to the clutch 38, and power is transmitted from the clutch 38 to the operation panel 12. When transmitting, it has the structure which decelerates. The tooth wheel train 37 is provided with a one-way clutch 57 that cuts off power transmission when the operation panel 12 is rotated in the opening direction and transmits power when the operation panel 12 is rotated in the closing direction.

  The gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 increase in speed when power is transmitted from the operation panel 12 to the clutch 38, and power is transmitted from the clutch 38 to the operation panel 12. When transmitting, the one-way clutch 57 stops transmitting power when the operation panel 12 is rotated in the opening direction, and transmits power when the operation panel 12 is rotated in the closing direction. When the hand 12 is lifted and turned upward and released, the return of the operation panel 12 due to the backlash of the gear can be reduced by the above speed increasing action.

  Further, even when a downward force is applied to the operation panel 12 when operating the operation panel 12, the above-mentioned speed-up side action amplifies the holding action at the clutch 38, and the tilt of the operation panel 12 is increased. The corner can be held securely. In addition, when the operation panel 12 is driven by the motor 41, the operation panel 12 can be rotated with a small torque by the action of the deceleration, and the torque of the clutch 38 is applied to the motor 41 by the one-way clutch 57. Therefore, the tilt portion can be rotated with much smaller torque.

  That is, the torque that pushes down the operation panel 12 is set larger than the torque that pushes up the operation panel 12. More specifically, the torque that pushes down the operation panel 12 is set to be larger than the torque generated by the force that presses a button or the like that is an input unit provided on the operation panel 12.

  Even if the toothed wheel train 37 does not exhibit the speed increasing and deceleration actions, when the operation panel 12 is driven by the motor 41 (when it is turned upward), the one-way clutch 57 causes the clutch 38 to rotate. Since no torque is applied to the motor 41, the operation panel 12 can be rotated with a small torque.

  Further, the clutch 38 generates a frictional force by the magnetic force, and holds the angle of the operation panel 12 by the frictional force. Therefore, the size can be further reduced, and the number of torque adjustment parameters can be increased. Specifically, in this embodiment, the torque is adjusted by the outer diameter and thickness of the rotating disk 91, the coefficient of friction between the rotating disk 91 and the fixed disk 93, the magnetic force of the magnet 92 (the outer diameter and thickness of the magnet 92), and the like. Is possible.

  Further, since the one-way clutch 57 is provided in the immediate vicinity of the clutch 38, the tilt angle is provided by being provided in the immediate vicinity of the clutch 38 that is most accelerated when power is transmitted from the operation panel 12 side to the clutch 38 side. Can be held more reliably.

  Furthermore, the operation panel 12 is powered between the gear 33, the gear 34, the shaft 35, the gears 36-1 and 36-2, and the toothed wheel train 37 on both sides of the portion attached to the main body 11. To communicate. Thereby, it can prevent that the operation panel 12 inclines with respect to the main body 11, and can reduce shakiness more.

  As described above, when the operation panel 12 is opened, the return amount of the operation panel 12 due to backlash or the like can be reduced. By using the one-way clutch 57 and the clutch 38, the operation panel 12 can be held with a predetermined torque when the operation panel 12 is opened and lightly when the operation panel 12 is closed.

  Since the clutch 38, which is a magnetic friction clutch, is employed, it is not necessary to provide a spring support, and the axial direction can be reduced. Further, since the clutch 38 is a magnet type friction clutch, the force of the magnet 92, the distance between the magnet 92 and the fixed disk 93 (the thickness of the rotating disk 91), the thickness of the fixed disk 93, and the outer diameter of the rotating disk 91 are 4. The torque for holding the operation panel 12 can be adjusted with one parameter.

■■■■■ Third embodiment ■■■■■
Moreover, the function as a flywheel can also be provided to the clutch which produces a frictional force.
FIG. 12 is a perspective view showing details of a configuration including a clutch according to another embodiment. In the present embodiment, the same components as those in the first and second embodiments described above are denoted by the same reference numerals, and the description that overlaps appropriately will be omitted below. In FIG. 12, the transmission mechanism 30 includes a toothed wheel train 37 and a one-way clutch 57, as in the first and second embodiments described above. However, the one-way clutch 57 is hidden behind the clutch 111 in FIG. 12, and is not shown.

  Further, the operation panel 12, the fan gear 32-1, the gear 33, the shaft 35, the gear 36-1, and the toothed wheel train 37 shown in FIG. Since this is the same as that shown in FIG. The outer ring 72 of the one-way clutch 57, which is a gear, meshes with the gear 121 provided in the clutch 111.

  The clutch 111 is an example of a holding mechanism. The clutch 111 is a magnet type friction clutch provided with a function as a flywheel. That is, the clutch 111 generates a frictional force by a magnetic force. The clutch 111 stores kinetic energy by rotation. The configuration of the clutch 111 will be described with reference to FIGS. 13 and 14. FIG. 13 is a perspective view showing the configuration of the clutch 111. FIG. 14 is an exploded view showing the configuration of the clutch 111.

  The clutch 111 includes a rotating disk 131, a magnet 132, a fixed disk 133, a flywheel 134, and a double-sided tape 135. The rotating disk 131 is formed in a disk shape from a non-magnetic material. The rotating disk 131 is formed integrally with the cylindrical gear 121 and the flywheel 134. The rotating disk 131 is pressed against the fixed disk 133 to generate a frictional force.

  The magnet 132 is formed in a ring shape. The diameter of the inner hole of the magnet 132 is larger than the diameter of the tooth tip circle of the gear 121, and the outer diameter of the magnet 132 is smaller than the outer diameter of the rotating disk 131. A hole inside the magnet 132 is passed through the gear 121, and the magnet 132 is adhered to the rotating disk 131 by the double-sided tape 135 between the magnet 132 and the rotating disk 131.

  The fixed disk 133 is formed of a magnetic material, such as metal, and is fixed to the main body 11 with screws or the like. As shown in FIGS. 13 and 14, the rotating disk 131 is disposed so as to be sandwiched between the magnet 132 and the fixed disk 133. The magnet 132 presses the rotating disk 131 against the fixed disk 133 by a magnetic force generated between the magnet 132 and the fixed disk 133 that is a magnetic body. As a result, a frictional force is generated between the rotating disk 131 and the fixed disk 133.

  The flywheel 134 is formed outside the rotating disk 131 in a disk shape coaxial with the rotating disk 131. In the clutch 111 shown in FIGS. 13 and 14, the flywheel 134 is formed offset in the axial direction with respect to the rotating disk 131 in order to prevent interference with the fixed disk 133. The inertia moment of the flywheel 134 is set larger than the inertia moment of the rotating disk 131. The flywheel 134 stores kinetic energy by rotating.

  The clutch 111 is opened by the frictional force generated in the clutch 111 until it is substantially parallel to the top plate of the main body 11 through the gear train 37, the gears 36-1 and 36-2, the shaft 35, the gear 34, and the gear 33. The operation panel 12 (tilted state) that is open, partially open, or closed is held.

  Further, when the operation panel 12 is closed, the flywheel 134 of the clutch 111 rotates and stores kinetic energy, so that the flexure of the tooth wheel train 37 is released by the kinetic energy, and the flexure of the tooth wheel train 37. Can suppress the spring back. Therefore, the operation panel 12 is not pushed back to the open side, or the degree can be reduced. Therefore, the operation panel 12 can be reliably closed without creating a gap with the main body 11.

  When the torque limiter is used, the operating force changes when the friction changes from static friction to dynamic friction. On the other hand, when the flywheel 134 is used, since it does not depend on the coefficient of static friction unlike the torque limiter, the operation panel 12 is moved from a state where the operation panel 12 is held at a predetermined angle. Becomes smooth.

  Furthermore, by simultaneously using the frictional force between the rotating disk 131 and the fixed disk 133 and the moment of inertia of the rotating disk 131, the rotational load at the beginning of the movement of the clutch 111 can be increased, and a stronger force (torque) ) Can hold the operation panel 12. By reducing the frictional force between the rotating disk 131 and the fixed disk 133, the influence of the spring back can be further reduced.

As described above, the amount of return in the closing direction when opened can be made smaller, held stronger in the closing direction, and opened with a smaller force.
In this embodiment, the flywheel 134 is a component of the clutch 111, but may be a component outside the clutch 111, for example, a component of the transmission mechanism 30. At that time, by providing a flywheel in the transmission mechanism 30 in the immediate vicinity of the clutch 111, it is possible to effectively suppress springback due to the bending of the toothed wheel train 37.

  Although the printer 1 has been described as a printing apparatus, it may be a recording apparatus that is a printing apparatus, a copying machine, or a facsimile apparatus.

  Further, the present invention can be applied not only to the operation panel 12 but also to a part that opens and closes in the direction of gravity and needs to hold an angle in the middle, such as a hinge unit of a scanner unit or a document cover of a scanner.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

DESCRIPTION OF SYMBOLS 1 Printer, 11 Main body, 12 Operation part, 20 Transmission mechanism, 21 Clutch, 22 Rotating disk, 23 Gear, 24 Coil spring, 25 Fixed disk, 26 Stopper, 30 Transmission mechanism, 31 Frame, 32-1 Fan-shaped gear, 32- 2 Fan-shaped gear, 33 gear, 34 gear, 35 shaft, 36-1 gear, 36-2 gear, 37 toothed wheel train, 38 clutch, 41 motor, 51 to 56 gear, 57 one-way clutch, 58 gear, 71 inner ring, 72 Outer ring, 91 rotating disk, 92 magnet, 93 fixed disk, 94 double-sided tape, 111 clutch, 121 gear, 131 rotating disk, 132 magnet, 133 fixed disk, 134 flywheel, 135 double-sided tape

Claims (9)

A rotatable tilt part;
A holding mechanism for holding an angle of the tilt part;
A transmission mechanism for transmitting power between the tilt portion and the holding mechanism,
The transmission mechanism includes a one-way clutch that cuts off the transmission of power to the holding mechanism when rotating the tilt portion in the upward direction and transmits power to the holding mechanism when rotating the tilt portion in the downward direction. ,
A recording apparatus. The recording apparatus according to claim 1, wherein the holding mechanism generates a frictional force by an urging unit and holds the angle of the tilt portion by the frictional force. The recording apparatus according to claim 1, wherein the holding mechanism generates a frictional force by a magnetic force, and holds the angle of the tilt portion by the frictional force. 4. The recording apparatus according to claim 1, wherein the one-way clutch is provided in the immediate vicinity of the holding mechanism. 5. 5. The recording apparatus according to claim 1, wherein the transmission mechanism speeds up when power is transmitted from the tilt unit side to the holding mechanism side, and the tilt mechanism side from the holding mechanism side. A gear group that decelerates when transmitting power to
A recording apparatus.   The recording apparatus according to any one of claims 1 to 5, wherein the tilt portion transmits power to and from the transmission mechanism on both sides of a portion attached to a main body of the recording apparatus. A recording apparatus. The recording apparatus according to any one of claims 1 to 6, wherein the transmission mechanism includes a flywheel.
A recording apparatus. The recording apparatus according to any one of claims 1 to 6, wherein the holding mechanism includes a flywheel.
A recording apparatus. 9. The recording apparatus according to claim 1, wherein the tilt unit is an operation panel constituting an operation unit of the recording apparatus.
A recording apparatus.

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