JP2004231392A - Recording medium carrying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recorder for preventing the deterioration of a printing quality level while miniaturizing itself. <P>SOLUTION: A discharge belt 17 is used as a means for transmitting power to a discharge roller 12. A pulley part for rotating the discharge belt 17 is integrally formed on a LF transmission gear 9 for transmitting power to a LF roller 7. The discharge belt 17 is bridged to the pulley part and the discharge pulley 13 for transmitting power thereto. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording medium transport device that transports a recording medium such as a recording sheet.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there are many recording apparatuses such as an inkjet apparatus that scan a recording head in a main scanning direction and scan a recording sheet in a sub-scanning direction to form an image such as a character on the recording sheet.
[0003]
Many apparatuses scan the recording paper in the sub-scanning direction using an LF (transport) roller and a paper discharge roller.
[0004]
The paper discharge roller scans the recording paper in the sub-scanning direction in an area other than the transportable range of the LF roller, and is installed downstream of the LF roller, that is, in the direction in which the recording paper scanned by the LF roller advances. Is done.
[0005]
The LF roller has a portion supported by a bearing and a portion provided with a friction member such as ceramic particles on a part of the outer diameter of the LF roller. The friction member and a plurality of members provided above the friction member are provided. In many cases, the recording paper is narrowed by the pinch roller, and the recording paper is conveyed by the cooperative rotation of the LF roller and the pinch roller.
[0006]
Further, as a method of transmitting power to the paper discharge roller, for example, a gear train including a plurality of gears and the like is configured further downstream from an LF gear provided for transmitting power from a driving source to the LF roller. Therefore, there are many models that transmit power to a paper discharge roller.
[0007]
[Problems to be solved by the invention]
There is a demand for miniaturization of the recording apparatus in the above-mentioned conventional example, and in particular, there is a case where a recording apparatus such as a portable or mobile device needs to be miniaturized.
[0008]
Due to the demand for miniaturization, the size of gears (gears, etc.) for transmitting power to the paper discharge roller cannot be increased in many cases. As a countermeasure, a method of transmitting power using a plurality of small gear trains (gear trains, etc.) has been proposed. Conceivable.
[0009]
However, in the above case, as the number of gears increases, the accuracy of each gear decreases the conveyance accuracy, and it is inevitable that synergistically adversely affects the print quality, and the cost of the apparatus increases. There is concern.
[0010]
Therefore, in recent years, in ink-jet printers and the like, where high definition or high speed of images and cost reduction of the apparatus are progressing, realizing both the downsizing of the apparatus and the printing quality and cost reduction is a major issue. Has become.
[0011]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a recording medium transport apparatus capable of suppressing a decrease in the transport accuracy of a recording medium while reducing the size.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a recording medium transport device of the present invention includes a transport roller that transports a recording medium, an intermediate gear that transmits power from a driving source to the transport roller, and a recording medium that is transported by the transport roller. And a first pulley that rotates integrally with the discharge roller, a second pulley that is integrated with the intermediate gear and has the same axis as the intermediate gear, A belt member bridged between the first pulley and the second pulley is provided.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on an example shown in the drawings.
[0014]
First, the basic configuration of the present embodiment will be described with reference to FIGS. FIG. 1 is an external perspective view showing a basic configuration of the present embodiment, and FIG. 2 is a schematic cross-sectional view for explaining a conveyance path of a recording sheet (recording medium) in the present embodiment.
[0015]
In FIG. 1, 1 is a pinch roller holder, 2 is a chassis, 3 is a pinch roller, 4 is a paper detection sensor, 5 is an LF (transport) motor as a drive source, 6 is an LF (transport) gear, and 7 is a recording medium. An LF (transport) roller for conveying, 8 a platen, 9 an LF transmission (two-stage) gear as an intermediate gear, 10 an LF roller bearing L, 11 an LF roller bearing R, 12 a discharge roller as a discharge roller, 13 is a paper discharge pulley, 14 is a paper discharge roller bearing R, 15 is a paper discharge roller bearing L, 16 is a spur, 17 is a paper discharge belt as a belt member, 18 is an idle pulley, 19 is a tension pulley, and 20 is paper discharge This is a paper ejection pressing unit that urges the roller 12 in a predetermined direction.
[0016]
2, reference numeral 21 denotes a recording head, 22 denotes a recording sheet as a recording medium, 23 denotes a lower guide, and 24 denotes an upper guide. The paper passing upper guide 24 also has a holder function for accommodating a flexible cable (not shown) for electrically connecting the recording head 21 to a drive circuit board (not shown). In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals.
[0017]
Returning to FIG. 1, a friction member 7 a such as a ceramic particle is applied to a part of the LF roller 7 constituted by a metal shaft by spraying or electrostatic painting, and the like, and at a corresponding position, A plurality of pinch rollers 3 are rotatably mounted on the plurality of pinch roller holders 1.
[0018]
The friction member 7a is formed by applying a ceramic particle or forming an uneven portion by rolling or the like, and forms a friction band region on a part of the outer periphery of the LF roller 7.
[0019]
The pinch roller holder 1 is rotatably attached to a main body of the apparatus about a rotation shaft (not shown), and a pinch roller spring (not shown) urges the pinch roller holder 1 from below, so that the pinch roller 3 is turned on. The LF roller 7 rotatably attached to the main body is urged by a proper spring force, and the pinch roller 3 and the LF roller 7 hold the recording sheet 22 therebetween, and the recording sheet 22 is rotated by the cooperative rotation of the recording sheet 22. Convey downstream.
[0020]
An LF roller bearing R11 is attached to the right end of the LF roller 7, and an LF roller bearing L10 is attached to the left end of the LF roller 7, and rotatably supports the LF roller 7.
[0021]
An LF (transport) gear 6 is attached to the left end of the LF roller 7, and the LF gear 6 rotates integrally with the LF roller 7.
[0022]
The LF motor gear 5a meshes with the large gear 9c as a tooth of the LF transmission gear 9, and the LF gear 6 meshes with the small gear 9d coaxially and integrally formed with the large gear 9c. Therefore, the rotational force of the LF motor 5 is transmitted to the large gear 9c via the motor gear 5a, and is transmitted to the LF roller 7 rotating integrally with the LF gear 6 via the small gear 9d formed integrally with the large gear 9c. Transmit power. That is, the tooth portion transmits power to the LF roller 7, and the LF gear 6 receives power from the LF transmission gear.
[0023]
In the direction downstream of the LF roller 7, that is, in the direction in which the recording paper 22 is conveyed by the LF roller 7, the discharge roller 12 is supported by the recording apparatus in a rotatable state by a discharge roller bearing R14 and a discharge roller bearing L15. I have.
[0024]
A plurality of paper discharge roller rubbers 12a are formed integrally with the paper discharge roller 12, and the spur 16 rotatably attached to a spur mounting member (not shown) and the paper discharge roller rubber 12a hold the recording paper 22 therebetween. These rotate and cooperate to convey and discharge the recording paper 22.
[0025]
A discharge pulley 13 as a first pulley is attached to the left end of the discharge roller 12 so as to rotate integrally with the discharge roller 12, and a second pulley 13 is provided concentrically with the LF transmission gear 9. A discharge belt 17 is hung between the pulley portion 9a as a pulley and the discharge pulley 13 (see FIG. 4).
[0026]
Therefore, the rotation of the LF transmission gear 9 is transmitted to the discharge roller 12 via the discharge pulley 13 by the discharge belt 17.
[0027]
Next, the transport operation of the recording paper 22 on which the LF roller 7 and the discharge roller 12 act will be described.
[0028]
The LF roller 7 is installed on the upper surface side (the surface on which recording is performed by the recording head 21) of the recording paper 22 to be conveyed, and is a counterclockwise direction of the motor gear 5a when viewed from the direction of arrow A in FIG. The rotation in the (CCW direction) is transmitted as the clockwise rotation (CW direction) of the LF transmission gear 9 as viewed from the direction of arrow A in FIG. 1, and the rotation of the LF transmission gear 9 in the CW direction is The rotation is transmitted as the rotation of the LF gear 6 in the counterclockwise direction (CCW direction) as viewed from the direction of arrow A in FIG. 1, and the LF roller 7 rotates in the CCW direction to move the recording paper 22 in the downstream direction (sub-scanning direction). ).
[0029]
On the other hand, the conveyance operation of the recording paper 22 by the paper discharge roller 12 is as follows.
[0030]
The paper discharge roller 12 is provided on the lower surface (the surface on which recording is not performed by the recording head 21) of the recording paper 22 to be conveyed, and the rotation of the motor gear 5a in the CCW direction is regarded as the rotation of the LF transmission gear 9 in the CW direction. The rotation is transmitted to the discharge pulley 13 by the discharge belt 17 via the pulley portion 9a that rotates integrally with the LF transmission gear 9, and transmitted as the rotation of the discharge roller 12 in the CW direction.
[0031]
Therefore, the paper discharge roller 12 conveys the recording paper 22 conveyed by the LF roller 7 in the downstream direction together with the LF roller 7, and conveys the recording paper 22 conveyed by the LF roller 12 in the downstream direction, and discharges the recording paper 22. I do.
[0032]
Next, a paper passing path of the recording paper 22 in the present embodiment will be described with reference to FIG.
[0033]
As described above, the pinch roller 3 provided below the LF roller 7 provided above the recording paper 22 (recording surface side) is urged toward the LF roller 7 by a pinch roller spring (not shown). .
[0034]
On the downstream side (right side in the drawing) of the LF roller 7 in the transport direction, a paper discharge roller 12 is provided, and a spur 16 provided above the paper discharge roller 12 is moved from above to the paper discharge roller 12 side. Being energized.
[0035]
The recording paper 22 is transported between the LF roller 7 and the pinch roller 3 by a paper feed roller (not shown) from an upstream direction (left side in the drawing). Thereafter, the recording paper 22 is conveyed in the downstream direction (right side in the drawing) by the cooperative rotation of the LF roller 7 and the pinch roller 3, and the recording paper 22 reaches the paper discharge roller 12. The discharge roller 12 conveys the recording paper 22 in the downstream direction in synchronization with the LF roller 7 by cooperative rotation with the spur 16, and finally discharges the recording paper 22 to the outside of the apparatus by the discharge roller 12.
[0036]
Between the LF roller 7 and the paper discharge roller 12 and above the recording paper 22 (on the recording surface side), a recording head 21 that moves in a direction perpendicular to the transport direction of the recording paper 22 is mounted on a carriage (not shown). The recording head 21 moves in a direction perpendicular to the conveying direction of the recording paper 22 and performs a recording operation according to a predetermined sequence.
[0037]
Therefore, in this embodiment, the LF roller 7 supplies the recording paper 22 to the recording head 21, and the discharge roller 12 conveys and discharges the recording paper passing through the recording head 21.
[0038]
Therefore, the recording apparatus of the present embodiment scans the recording paper 21 in the main scanning direction, and scans the recording paper 22 in the sub-scanning direction with a recording medium transport device including the LF roller 7 and the paper discharge roller 12. An image such as a character is formed on the image.
[0039]
As described above, the recording medium transport device of the first configuration included in the present embodiment includes a transport roller that transports a recording medium, and a transport gear that rotates integrally with the transport roller and receives power from the intermediate gear. Since the transport roller is disposed on the surface of the recording medium on which recording is performed, the transport roller is disposed on the surface of the recording medium on which recording is performed, and the recording of the recording medium is performed. When there is a restriction on the distance from the non-recording surface on which the recording is not performed to the end of the apparatus existing on the non-recording surface side, the conveyance roller is more conveyed than when the conveyance roller is arranged on the non-recording surface side of the recording medium. It is possible to increase the outer diameter of the gear, and it is possible to prevent a decrease in transport accuracy.
[0040]
For example, it is conceivable that the LF gear 6 cannot be enlarged due to a restriction on physical dimensions such as the width or height of the apparatus due to a demand for miniaturization, and the number of teeth provided on the LF gear 6 decreases as the diameter of the LF gear 6 decreases. May be reduced, which may reduce the accuracy of the LF roller 7 to convey the recording paper.
[0041]
However, according to the recording medium transport device, when the distance from the non-recording surface on which recording of the recording paper is not performed to the end of the device existing on the non-recording surface side is restricted, the outer diameter of the LF gear 6 is reduced. By making it possible to increase the size, it is possible to prevent a decrease in transport accuracy.
[0042]
Supplementing the above point, for example, when the recording paper 22 is in contact with the LF roller 7, the distance from the non-recording surface of the recording paper 22 on which no recording is performed to the end of the apparatus existing on the non-recording surface side Is constant, the distance from the axis center of the LF roller 7 to the end of the apparatus is determined such that the LF roller 7 is disposed on the non-recording surface side when the LF roller 7 is disposed on the recording surface of the recording paper 22. Longer than if
[0043]
Here, the distance from the axis center of the LF roller 7 to the end of the device is a length related to the maximum value of the radius of the LF gear 6.
[0044]
Therefore, when the distance from the non-recording surface of the recording paper 22 on which recording is not performed to the end of the device existing on the non-recording surface side is limited, the LF roller 7 is more likely to be disposed on the non-recording surface side. When the LF roller 7 is disposed on the surface of the recording paper 22 on which recording is performed, the outer diameter of the LF gear 6 can be increased.
[0045]
The above-described effect is effective in a mobile small recording apparatus and a recording medium transport apparatus used in the small recording apparatus, which have many restrictions on miniaturization.
[0046]
Next, the configuration of the transport mechanism of the recording paper 22 by the paper discharge roller 12 will be described in detail with reference to FIGS. 1, 3, 4, and 5. FIG. 3, 4, and 5, the same components as those in FIG. 1 or 2 are denoted by the same reference numerals.
[0047]
FIG. 3 is an enlarged view of a main part of FIG. 1 (a view when viewed from the direction of arrow A shown in FIG. 1) for explaining a rotation transmission relationship of the LF transmission gear 9 and the discharge pulley 13 and the like.
[0048]
FIG. 4 is an enlarged view of a main part of FIG. 1 (a view when viewed from a direction opposite to an arrow A shown in FIG. 1) for explaining a transmission relation of rotation of the LF transmission gear 9 and the discharge pulley 13 and the like.
[0049]
FIG. 5 is a sectional view of the LF transmission gear 9.
[0050]
The LF transmission gear 9 has a bearing 9a1 and teeth 9c and 9d.
[0051]
As shown in FIG. 5, for example, the pulley portion 9a is concentric with the large gear 9c and the small gear 9d as teeth formed of a mold member, and is formed integrally with the bearing 9a1 by a metal member 9b. It is a binding part.
[0052]
It is desirable that the metal member 9b is formed integrally with mold members such as the large gear 9c and the small gear 9d by insert molding.
[0053]
As shown in FIGS. 1, 3 and 4, a discharge belt is provided between the pulley portion 9a and a discharge pulley 13 attached to a left end (right end in FIG. 4) of the discharge roller 12. 17 are crosslinked.
[0054]
As shown in FIGS. 3 and 4, the rotatable tension pulley 19, which is a support member of the belt bridge, is provided with a tension urging mechanism including a tension plate 25 and a tension spring 26, and is provided with a left side plate 2 d of the chassis 2. Attached to.
[0055]
As shown in FIGS. 3 and 4, the tension pulley 19 forms the lower bridge path of the belt 17 by guiding the discharge belt 17 to the lower side in the drawing by the tension urging mechanism.
[0056]
As shown in FIGS. 3 and 4, an idle pulley 18 is rotatably attached to the idle pulley receiving portion 10b formed at the end of the LF roller bearing L10.
[0057]
As shown in FIGS. 3 and 4, the paper discharge belt 17 is guided upward by the idle pulley 18 to form a bridge path above the paper discharge belt 17.
[0058]
Therefore, the rotation of the motor gear 5a in the CCW direction is transmitted to the CW rotation of the LF transmission gear 9, and further the rotation is transmitted in the CCW rotation direction of the LF gear 6, so that the LF roller 7 rotates in the CCW direction and at the same time, the LF transmission gear 9 rotates. The paper discharge belt 17 bridged between the pulley portion 9a and the paper discharge pulley 13 which are formed by insertion is also rotated in the CCW direction, and the paper discharge roller 12 is rotated in the CCW direction to move the recording paper 22 in the downstream direction. Transport.
[0059]
As described above, the recording medium transport device of the second configuration included in the present embodiment includes a transport roller that transports a recording medium, an intermediate gear that transmits power from a drive source to the transport roller, and a transport roller that transports power. A discharge roller for conveying and discharging the recording medium, a first pulley that rotates integrally with the discharge roller, and a second pulley that is configured integrally with the intermediate gear and has the same axis as the intermediate gear. And a belt member bridged between the first pulley and the second pulley, so that a mechanism for compactly transmitting power to the discharge roller without increasing the number of parts can be configured. It becomes.
[0060]
Therefore, according to the second configuration, the paper discharge belt 17 is used as the power transmission means to the paper discharge roller 12, and the paper discharge belt 17 is rotated by the LF transmission gear 9 for transmitting the power to the LF roller 7. Pulley portion 9a is formed integrally, and a discharge belt 17 is bridged between the pulley portion 9a and the discharge pulley 13 to transmit power, so that the discharge roller can be compactly formed without increasing the number of parts. It is possible to configure a mechanism for transmitting power.
[0061]
For example, as compared with a configuration in which the power is transmitted to the paper discharge roller 12 by using a plurality of small gear trains to transmit the power, it is possible to suppress an increase in the number of gears. It is possible to prevent the conveyance accuracy from being deteriorated due to accumulation of the deviation in accuracy.
[0062]
Further, in the recording medium transport device of the second configuration, the intermediate gear has a bearing portion and a tooth portion for transmitting power to the transport roller, and the tooth portion is formed of a mold member, The pulley and the bearing portion are integrally formed of a metal member. If the mold member and the metal member are integrally formed by insert molding, the same effects as described above can be obtained. The accuracy of the bearing hole of the intermediate gear can be improved as compared with the case where the teeth of the intermediate gear, the bearing, and the second pulley are integrally formed by molding.
[0063]
Further, according to the above configuration, it is possible to reduce the clearance between the intermediate gear and the shaft that rotatably supports the intermediate gear as much as possible.
[0064]
Further, by molding the tooth portion with a mold, it is possible to achieve noise reduction and cost reduction as compared with a case where the entire portion is formed of metal.
[0065]
Note that the second configuration preferably includes the first configuration.
[0066]
Next, referring to FIGS. 3, 6, and 7, a mechanism for urging the paper ejection belt 17 to tension in the present embodiment will be described in detail. 6 is a perspective view showing the tension plate 25, and FIG. 7 is a perspective view showing the left side plate 2d of the chassis 2. 6 and 7, the same components as those in the previous drawings are denoted by the same reference numerals.
[0067]
In FIG. 6, reference numeral 25 denotes a tension plate as a swinging portion. A spring receiving portion 25a for attaching a tension spring 26 as an urging portion shown in FIG. A rotating shaft 25b, which is a member that rotatably supports the tension pulley 19, is fixed to the left end of the tension plate 25 as the other end by caulking or the like.
[0068]
The tension plate 25 has a substantially L-shape, and has a corner portion 25c which is a bent portion having a substantially L-shape.
[0069]
In FIG. 7, a substantially L-shaped cut and bent portion 2a as a bent and raised portion for rotatably supporting the tension plate 25 is bent and raised from a part of the left side plate 2d included in the main body chassis 2. A spring receiving portion 2b for attaching the tension spring 26 shown in FIG. 3 to the chassis 2 is formed on the left side plate 2d of the chassis 2 near the cut and bent portion 2a. In this embodiment, a cut-and-bent portion bent from the left side plate 2d of the chassis 2 is used as the spring receiving portion 2b.
[0070]
FIG. 3 shows a state where the tension mechanism including the tension plate 25 and the tension spring 26 is attached to the left side plate 2 d of the chassis 2.
[0071]
The tension mechanism is a means for applying a constant tension to the discharge belt 17.
[0072]
In this embodiment, after the tension pulley 19 is inserted into the rotation shaft 25b provided at the left end of the tension plate 25, the tension pulley 19 is rotatably attached to the rotation shaft 25b with a retaining ring member such as a slit ring.
[0073]
Subsequently, the corner 25c of the tension plate 25 is connected to the gap 2c (FIG. 7) formed between the substantially L-shaped cut and bent portion 2a provided on the left side plate 2d of the chassis 2 and the left side plate of the chassis 2. See). Therefore, the tension plate 25 can swing about the contact point (corner 25c) contacting the cut and bent portion 2a.
[0074]
Thereafter, the tension spring 26 is inserted while being compressed between the spring receiving portion 2b provided on the left side plate 2d of the chassis 2 and the spring receiving portion 25a of the tension plate 25.
[0075]
By the insertion of the tension spring 26, the tension plate 25 receives a force in the direction of arrow F in FIG. 3 from the tension spring 26, and the corner 25c of the tension plate 25 is substantially L-shaped provided on the chassis 2. It is pressed against the cutting and bending portion 2a. That is, the tension spring 26 is provided on one end side of the tension plate 25 and applies a predetermined rotational force to the tension plate 25 with the corner 25c as a fulcrum.
[0076]
As shown in FIG. 3, the direction of the force applied to the tension plate 25 in the direction of arrow F in FIG. 3 does not directly face the engaging portion between the tension plate 25 and the cut-and-bent portion 2a. The rotational force is applied in the direction of arrow M in FIG.
[0077]
Therefore, the tension pulley 19 rotatably attached to the tension plate 25 also receives a rotational force in the direction of arrow M in FIG.
[0078]
The tension pulley 19 that has received the rotational force in the direction of the arrow M in FIG. 3 presses the discharge belt 17 and stabilizes in a rotatable state while applying tension to the discharge belt 17. That is, the tension pulley 19 is provided on the other end side of the tension plate 25 and applies tension to the discharge belt 17 based on a predetermined rotation force of the tension plate 25.
[0079]
In the above-described state, the tension plate 25 causes the tension pulley 19 to receive a repulsive force from the discharge belt 17 (a force in the direction opposite to the arrow M in FIG. 3) and an urging force by the tension spring 26 to cause an arrow in FIG. The balance of the forces in the M direction is obtained.
[0080]
Accordingly, the tension plate 25 maintains the above-mentioned state without falling off from the chassis 2 while being pressed against the cut and bent portion 2b of the chassis 2 without rotating any more.
[0081]
As described above, the recording medium transport apparatus of the third configuration included in the present embodiment includes a discharge roller that transports and discharges a recording medium, a belt member that transmits power to the discharge roller, a main body chassis, and the main body. A bent portion raised from the chassis, a swing portion that can swing with a contact point contacting the bent portion as a fulcrum, and provided at one end of the swing portion, An urging portion for applying a rotational force in a predetermined direction with the contact point as a fulcrum, and a tension member provided on the other end side of the oscillating portion to apply tension to the belt member based on the predetermined rotational force of the oscillating portion. And a tension pulley, which provides a proper tension to the belt member, so that the swinging part can be brought into contact with the bending and raised part of the chassis, and the swinging part can be made to swing with the contact point as a fulcrum. Simple configuration Since the, for example, a metal stud fixed with caulking or the like to the chassis, which in comparison to a configuration in which the rotation center of the oscillating member, it is possible to reduce the cost.
[0082]
Note that the second configuration preferably includes the third configuration.
[0083]
Further, in the third configuration, the shape of the cut and bent portion 2a, the shape of the tension plate 25, and the shape of the portion where the tension plate 25 contacts the cut and bent portion 2a are not limited to the above, and can be appropriately changed.
[0084]
However, in the third configuration or the second configuration including the third configuration, the bent and raised portion is substantially L-shaped, the swinging portion is substantially L-shaped, and the contact portion is With the configuration in which the substantially L-shaped oscillating portion is a bent portion, the same effect as described above can be achieved with a simple configuration.
[0085]
Further, as described above, the recording apparatus of the present configuration included in the present embodiment includes one of the above-described recording medium transport devices, for example, the first or second or third or second configuration has the first configuration. Any one of the configuration including the configuration described above, the configuration including the third configuration included in the second configuration, and the configuration including the intermediate gear, the bent and raised portion, the swinging portion, and the abutting portion included in the configuration described above. Since one recording medium transport device is included and recording is performed on the recording medium transported by the recording medium transport device, it is possible to reduce the recording accuracy while reducing the transport accuracy while reducing the size. Therefore, according to the present embodiment, it is possible to provide a recording apparatus capable of preventing the deterioration of the recording quality while reducing the size.
[0086]
In the embodiment described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration, and can be appropriately changed without changing the gist.
[0087]
For example, in the above embodiment, the intermediate gear is provided with a two-stage large gear and a small gear as the tooth portion. However, the present invention is not limited to this, and can be changed as appropriate.
[0088]
Further, in the above-described embodiment, the recording paper is used as the recording medium, but the recording medium is not limited to this, and can be appropriately changed.
[0089]
【The invention's effect】
As described above, according to the present invention, a belt member is used as power transmission means to a discharge roller for discharging a recording medium, and the belt member is rotated by an intermediate gear for transmitting power to a conveyance roller. The second pulley is integrally formed, and a belt member is bridged between the second pulley and the first pulley that rotates integrally with the discharge roller to transmit power, thereby increasing the number of parts. Thus, it is possible to configure a mechanism for transmitting power to the discharge roller in a compact manner.
[Brief description of the drawings]
FIG. 1 is a conceptual perspective view of a recording apparatus showing an embodiment of the present invention.
FIG. 2 is a sectional view of a recording apparatus showing an embodiment of the present invention.
FIG. 3 is a partial detailed view for explaining an embodiment according to the present invention.
FIG. 4 is a partial detailed view for explaining an embodiment according to the present invention.
FIG. 5 is a cross-sectional view of the LF transmission gear 9.
FIG. 6 is a partial detailed view for explaining an embodiment according to the present invention.
FIG. 7 is a partial detailed view for explaining an embodiment according to the present invention.
[Explanation of symbols]
1 Pinch roller holder 2 Chassis (left side plate)
2a Cutting / bending portion 2b Spring receiving portion 2c Gap portion 2d Left side plate of chassis 3 Pinch roller 4 Paper detection sensor 5 LF motor 6 LF gear 7 LF roller 8 Platen 9 LF transmission gear 9a Pulley portion 9a1 Bearing portion 9b Metal member 9c Large gear 9d small gear 10 LF roller bearing L
11 LF roller bearing R
12 discharge roller 13 discharge pulley 14 discharge roller bearing R
15 Discharge roller bearing L
Reference Signs List 16 spur 17 discharge belt 18 idle pulley 19 tension pulley 20 discharge press unit 21 recording head 22 recording paper 23 lower feed guide 24 upper guide 25 discharge belt tensioner plate 25a spring receiving portion 25b rotating shaft 25c corner 26 tension Spring

Claims (1)

A transport roller for transporting the recording medium;
An intermediate gear that transmits power from a drive source to the transport roller,
A discharge roller for conveying and discharging the recording medium conveyed by the conveyance roller,
A first pulley that rotates integrally with the discharge roller,
A second pulley integrally formed with the intermediate gear and having the same axis as the intermediate gear;
A recording medium transport device comprising a belt member bridged between the first pulley and the second pulley.

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