TWI402638B - Printer mechanism - Google Patents

Abstract

A printing mechanism comprising a housing, a image formming unit, a motor and a transmittal system. the housing has an inlet and an outlet. the transmittal system position in the housing and between the inlet and the outlet for transmitting the power of the motor. the transmittal system includes a first means and a second means. the first means includes a first gear. the second means includes a second gear, a third gear and a arm. the arm has a first end for coupling with the second gear and a second end for coupling with the third gear. the second gear engages between the first gear and the thired gear. when the arm swing, the second gear disconnect the engagement with the first gear, and the connection between the first means and the second means are interrupted.

Description

Printing device

The present invention relates to a printing apparatus, and more particularly to a printing apparatus which can release a jammed paper.

During the working process, the paper may be jammed due to paper warpage, wrinkles or uneven paper feeding path, or the paper may be left in the machine due to other reasons such as sudden power failure. These conditions require the user to manually remove the paper. At this time, a device is required to reduce the resistance to be overcome without additional operations, and to take out the paper simply, quickly and labor-savingly, and to improve work efficiency.

Generally, the printing device uses the roller group to convey the paper, so the roller group is loaded with the clamping force to clamp the paper, and the gear set usually links the entire transmission system to generate the multiplication effect, but the user will be The paper taken in the roller is required to be applied with a large pulling force, and sometimes even causes the paper to be torn, and the small paper remaining in the roller to be torn is more troublesome for the user to take out; in order to reduce the release There are two main methods for removing the paper jam by the roller. There are two main methods for manually removing the paper. One is to unscrew the roller unit of the fixing module to reduce the force of the fixing module to clamp the paper, making the paper easy. The removal is as disclosed in US Pat. No. 6,681,090; the other is to break the connection relationship of the gears during the release of the jam, to avoid the multiplication of the gear set linkage, and to reduce the resistance of the paper take-up, as disclosed in US Pat. No. 7,116,926. Content.

As shown in FIG. 1 , it is disclosed in US Pat. No. 6,681,090. a printing device comprising a toner cartridge 30, a fixing module 32, a paper feed guide 49, a rotating shaft 50, a pressure spring 52, a biasing spring 60, a cam 61 and a fixing device 64. The fixing module 32 includes two pressure rollers 32A, 32B; the two ends of the pressure spring 52 are respectively connected to the paper feeding guide 49 and the fixing device 64; the two ends of the biasing spring 60 are respectively connected to the cam 61 and the Fixing device 64; the cam 61 includes a downward facing contact surface 67 (see Fig. 2). The fixing module 32 allows the desired image to be fixed on a sheet of paper. When printing, the pressure roller 32A rotates counterclockwise, and the pressure roller 32B rotates clockwise, thereby driving a sheet of paper through a fixing region 54 formed between the pressure roller 32A and the pressure roller 32B. The paper and the carbon powder are heated by a heating element (not shown), and after the carbon powder is melted, the toner is fixed on the paper by the contact force between the pressure rollers 32A and 32B to complete the printing. process.

Referring to FIG. 1, when the toner cartridge 30 is taken out along the paper feed guide 49, the paper feed guide 49 is moved upward by the elastic force of the pressure spring 52, and the paper feed guide 49 is moved from the broken line position to the solid line. Location as shown. Since the paper guide rail 49 and the cam 61 are coupled to the rotating shaft 50, and the right end of the paper feeding guide 49 is displaced upward, the paper feeding guide 49 is displaced downward at an end close to the rotating shaft 50, thereby further The rotation of the cam 61 is caused, and the biasing spring 60 is placed in a compressed state. Since the rotation of the cam 61 drives the pressure roller 32A of the fixing module 32, the pressure rollers 32A, 32B are in a separated state, and a certain space is generated to facilitate paper taking.

When the toner cartridge 30 is loaded along the paper feed rail 49, as shown in FIG. The top of the toner cartridge 30 contacts the contact surface 67 of the cam 61 to rotate the cam 61 about its support axis, and since the biasing spring 60 is in a compressed state, there is a certain tension, thereby causing the fixing module The pressure roller 32A of 32 is lifted up, and is engaged with the pressure roller 32B, so that the paper is driven by the pressure rollers 32A and 32B through the fixing area 54, the printing process is completed, and the printing apparatus continues to operate normally.

The printing device reduces the force of the fixing module to sandwich the paper by releasing the fixing of the fixing module roller group, so that the jammed paper can be easily taken out. However, the fixing force of the fixing module is large. This method uses the toner 匣 directly to the clamping force of the fixing module roller, so that the fixing module is unstable during the rotation process, which will affect the quality of the printing.

Another type of printing device disclosed in U.S. Patent No. 7,116,926 is shown in FIG. The printing device has a transmission system including a movable gear 224, a rotating shaft 224a, and a groove 226. The rotating shaft 224a is disposed on the movable gear 224; the groove 226 is disposed on a bracket 290; the movable gear 224 is slidable in the groove 226 by the rotating shaft 224a.

In the working state, the power drives a gear 217 to rotate clockwise, thereby driving the gear 224 to rotate counterclockwise. Since the gear 217 generates a certain force on the gear 224, the gear 224 and the rotating shaft 224a slide along the groove 226 to reach the rightmost position. At this time, the gear 224 meshes with a gear 227 to achieve system power transmission. .

When a paper jam occurs, the motor reverses, and the direction of rotation of the gear is opposite to that in the normal working state, that is, the gear 217 rotates counterclockwise, thereby driving the gear 224 to rotate clockwise, at which time the gear 224 and the rotating shaft 224a follow the groove. The slot slide 226 slides to the leftmost position, and the gear 224 is disengaged from the gear 227, breaking the gear link and creating a certain space for easy removal of the jam.

This design can achieve the effect of breaking the gear chain without adding extra parts. However, it takes a little time to reverse the motor due to factors such as acceleration and deceleration and inertia. If it is caused by power failure or other reasons, the device will suddenly stop running. When the paper is placed in the machine, the movable gear 224 cannot be disengaged from the gear train by the motor reversal. In addition, when the motor is reversed, the toner of the toner cartridge may be leaked, and the photosensitive drum may be adsorbed to the toner that is not controlled by the system, which affects the printing quality.

Accordingly, the present invention provides a printing apparatus which can reduce the paper withdrawal resistance without switching the steering by a motor.

Another object of the present invention is to provide a printing apparatus which can take out a jammed paper from a paper discharge tray without taking out the toner.

Therefore, the printing device of the present invention comprises a casing, an image forming unit disposed in the casing, a motor and a transmission system. The housing has an input tray and an output tray. The transmission system is disposed in the casing and interposed between the paper feed tray and the paper output tray for transmitting power of the motor. The transmission system includes a first transmission group and a second transmission group. The first transmission set includes a first gear, the second transmission set includes a second gear, a third gear meshing with the second gear, and a swing arm having a pivotal connection with the second gear a first pivoting end and a second pivoting end pivotally connected to the third gear, and the second gear meshes with the first gear, the swing arm can be oscillated to disengage the second gear from the first Gear, cutting off the first transmission group and the first The power connection of the second drive train.

According to a preferred embodiment of the present invention, the printing device further includes a movable member having a guiding portion. When the movable member is in a first position, the first gear and the second gear Keeping the meshing, when the movable blocking member is in a second position, the movable blocking member contacts the guiding portion of the swing arm and forces the swing arm to interlock the second gear to be separated from the first gear, cutting off the first transmission group A power connection with the second transmission set.

According to a preferred embodiment of the present invention, the image forming unit includes a toner cartridge, and the toner cartridge has a positioning portion, and the printing device further includes an elastic member, the elastic member abuts the outer casing and Between the movable members, when the toner cartridge is installed in the outer casing, the positioning portion abuts against the movable member and compresses the elastic member, so that the movable member is in the first position; when the toner The casing is removed from the casing to separate the positioning portion from the movable member, and the movable member is displaced to the second position by the resilient force of the elastic member.

According to a preferred embodiment of the present invention, the swing arm is interposed between the movable member and the gears, and the swing arm further has a body having a first side facing the gears and a facing surface a second side of the movable blocking member, the first pivoting end and the second pivoting end are protruded from the first side, and the guiding portion is protruded from the second side.

According to a preferred embodiment of the present invention, the guiding portion has an elongated strip shape and has a first end and a second end higher than the first pivot end. The elastic member is a compression spring. Between the outer casing and the movable member, the movable member has a contact portion corresponding to the upper portion of the guiding portion. When the contact portion is adjacent to the first end, the movable blocking member is in the first position. The movable member is in the second position when the contact portion contacts the second end.

According to a preferred embodiment of the present invention, the guiding portion has a curved outer wall surface, the movable blocking member has a first segment and a second segment which are connected at an angle, and the elastic member is a torsion spring. One end is positioned on the second segment, and the other end abuts in the outer casing, and the end of the second segment is in contact with the curved outer wall surface of the guiding portion.

According to a preferred embodiment of the present invention, when the first gear is driven to rotate the second gear, the swing arm is rotated by the second gear to separate the second gear from the first gear.

The invention utilizes the moment of inertia generated when the gear transmission direction is different, so that the swing arm is oscillated to control the meshing and separating between the gears, so that the power connection between the first transmission group and the second transmission group can be cut off, thereby Reduce the resistance when the paper is pulled out. In addition, the present invention further utilizes the movable member affected by different external forces to relatively change the position of the swing arm, thereby changing the meshing state of the gear and the gear in the gear set, cutting off the power connection of the entire transmission system, and removing the Card paper.

The present invention provides a printing apparatus for releasing jammed paper during printing, and the foregoing and other technical contents, features and effects of the present invention are as follows with reference to two preferred embodiments of the accompanying drawings In the detailed description, it will be clearly presented.

5 to 11 show a preferred embodiment of the present invention. Referring to FIGS. 4-6, the printing device includes a housing 100, an image forming unit, a transmission system 400, a motor (not shown), and a set of motor gears disposed on the motor drive shaft. 500. The outer casing 100 has a paper feed tray 101 and a paper discharge tray 102 located above the paper feed tray 101. The image forming unit is disposed in the outer casing 100 and includes a toner cartridge 300 and a heater (not shown), wherein the toner cartridge 300 has a positioning portion 310 (see FIG. 8); the transmission system 400 includes a The paper unit 10, a photosensitive drum unit 70, a fixing unit 80, and a paper discharge unit 90. The paper feed unit 10, the photosensitive drum unit 70, the fixing unit 80, and the paper discharge unit 90 are all placed in the outer casing 100 of the printing device.

The paper feed unit 10 includes a pair of paper take-up rollers 11, 12 that are in contact with each other, a pair of transport rollers 15, 16 that are in contact with each other, a gear 13 and a gear 14. The gear 13 and the gear 14 are two-stage gears respectively having a small-diameter gear 131, 141. Further, the paper feeding unit 10 further includes a small-diameter gear 121 disposed coaxially with the paper take-up roller 12 and the transport roller 15 respectively. A small diameter gear 151. The small diameter gear 131 simultaneously meshes with the small diameter gear 121 and the small diameter gear 151, and the gear 13 meshes with the small diameter gear 141.

The drum unit 70 includes a gear 71, a gear 72, a gear 73, a gear 74, a pair of photosensitive drum rollers 75, 76, a swing arm 77, a movable member 78 and a resilient member 79. The gear 71 and the gear 72 are both secondary gears, respectively having a small diameter gear 711, 721. In addition, the photosensitive drum unit 70 further includes a small diameter gear 751 coaxially connected to the photosensitive drum roller 75, and the The gear 72 meshes with the small diameter gear 141, the small diameter gear 721 meshes with the small diameter gear 751, and the gear 73 meshes between the small diameter gear 711 and the gear 74.

Referring to FIG. 6, FIG. 8 and FIG. 9, the swing arm 77 has a body 776 and a body. The first pivoting end 771, the second pivoting end 770 and a guiding portion 772. The body 776 of the embodiment has a plate shape and has a first side 774 facing the gear 71 and a surface opposite to the first side 774. The second side 775 of the movable member 78, the first pivoting end 771 and the second pivoting end 770 are protruded from the first side 774, and the guiding portion 772 is protruded from the second side 775. The gear 73 is sleeved on the first pivot end 771 of the swing arm 78, and the second pivot end 770 is coaxially pivoted with the gear 71. In the present embodiment, the guiding portion 772 has an elongated shape and extends obliquely as a whole and has a first end 772a and a second end 772b having a height higher than the first end 772a.

The movable member 78 has a second side 775 facing the swing arm 77 and corresponding to the contact portion 780 above the guide portion 772. In the present embodiment, the contact portion 780 has a long rib shape. One end of the movable member 78 abuts the elastic member 79, and the other end of the elastic member 79 abuts and is positioned in the outer casing 100. In the first preferred embodiment, the elastic member 79 is a compression spring by means of the elastic member 79. The elastic member, the movable member 78 is biased to be laterally displaced relative to the outer casing 100 between a first position and a second position. When the movable member 78 is in the first position, the contact portion 780 is closer to the guide portion. The first end 772a of the 772, and the resilient member 79 is compressed. When the movable member 78 is in the second position, the contact portion 780 slides toward the second end 772b of the guiding portion 772 and is in contact with the second end 772b, and is in contact While the portion 780 slides toward the second end 772b of the guiding portion 772, since the guiding portion 772 extends obliquely, the guiding portion 772 is pressed by the contact portion 780 to cause the swing arm 77 to swing as a whole.

Referring back to FIGS. 4-6, the fixing unit 80 includes a gear 81, a gear 82, a gear 83, and a pair of fixing rollers 84, 85 that are in contact with each other. The gear 82 and the gear 83 are two-stage gears respectively having a small-diameter gear 821, 831. In addition, the fixing unit 80 further includes a large-diameter gear 841 coaxially connected to the fixing roller 84, the gear 81 meshes with the gear 74 and the small diameter gear 821; the gear 821 meshes with the small diameter gear 751; the large diameter gear 841 meshes with the small diameter gear 831.

The paper discharge unit 90 includes a gear 91, a gear 92, a gear 93, a gear 94, a gear 95, and a pair of paper discharge rollers 96 and 97 which are in contact with each other. Further, the paper discharge unit 90 is further provided. A small diameter gear 961 coaxially coupled to the paper discharge roller 96 and meshed with the gear 95 is included, and the gear 91 meshes with the large diameter gear 841.

Referring to FIG. 5 to FIG. 8 , when the printing device is in the standby state or the working state, since the toner cartridge 300 is disposed in the outer casing 100, the positioning portion 310 abuts against the movable member 78 opposite to the elastic member 79. The other end of the joint is pushed against the movable member 78 such that the elastic member 79 is compressed. At this time, the movable member 78 is in the first position, and the contact portion 780 is closer to the first end 772a of the guide portion 772 of the swing arm 77. And the gear 73 and the gear 74 are in a meshing state. When the motor is started, the power of the motor (not shown) is simultaneously transmitted to the gear 14 and the gear 71 via the motor gear 500, wherein the power transmitted to the gear 14 causes the gear 141 to drive the gear 13 to rotate, and thereby the gear The driving of the paper take-up rollers 11 and 12 and the conveying rollers 15 and 16 are performed to perform the operations of picking up paper and conveying the paper, and the rotation of the small-diameter gear 141 also drives the gear 72 to rotate, thereby being driven by the gear 721. The photosensitive rollers 75, 76 rotate.

When the motor gear 500 drives the gear 71 to rotate, due to the gear 71 The torque effect generated by the rotation causes the swing arm 77 and the gear 73 to swing in the direction of the gear 74, thereby maintaining the gear 73 and the gear 74 in a power connection state, and the power can be transmitted to the fixing unit 80 and the paper output. The unit 90 is finally delivered to the paper exit rollers 96, 97 to complete the paper discharge operation.

Referring to FIG. 4, FIG. 5, FIG. 9 and FIG. 10, when the printing device jams or other reasons (such as power failure) cause the paper to remain in the outer casing 100, if the position of the paper is sandwiched by the fixing unit 80, Alternatively, the paper tray 102 may be partially exposed between the fixing unit 80 and the paper discharge unit 90. At this time, if the paper is to be taken out along the original paper discharge direction of the transmission system 400 (for example, from the paper output tray 102) The paper is taken out to drive the fixing unit 80 and/or the paper discharge unit 90 to rotate, and then the other gears are rotated downward. When the power is transmitted between the gear 74 and the gear 73, the power transmission direction has been converted into the gear 74. Actively, the gear 73 is driven to rotate, and the gear 73 also rotates around the small-diameter gear 711. At this time, due to the moment effect caused by the displacement of the gear 73, the swing arm 77 generates a swing toward the arrow 700 (see FIG. 10). Moreover, the driving gear 73 is disengaged from the gear 74, and since the gears below the gear 73 have been disconnected from the gear 74, the extraction of the paper does not drive the other gears below the gear 73 of the transmission system 400, thereby reducing Paper is Out resistance.

Referring to FIG. 4, FIG. 9 and FIG. 11, when the paper is stuck at the position below the photosensitive rollers 75, 76 or between the photosensitive rollers 75, 76 and the paper feed rollers 11, 12, or is still partially exposed to the input tray At 101 o'clock, if the paper is to be taken out in the direction opposite to the paper feeding of the transmission system 400 (for example, by the paper feed tray 101), the outer casing 100 can be opened and the toner cartridge 300 can be taken out to make the toner 匣 The positioning portion 310 of the 300 is separated from the movable member 78. Since the force of the positioning portion 310 pushing the movable member 78 is eliminated, and the force of the elastic member 79 rebounding, the movable member 78 is pushed to the second position, so that the movable member 78 is moved to the second position. The movable member 78 is in contact with the guiding portion 772 of the swing arm 77 and presses the swing arm 77 downward along the extending direction of the guiding portion 772 to swing the swing arm 77 downward, and the gear 73 is disengaged from the gear 74. Engagement. At this time, since the gears above the gear 73 have been disconnected from the gear 73, the extraction of the paper does not drive the other gears above the gear 73 of the transmission system 400, thereby reducing the resistance of the paper being withdrawn.

Of course, in the case where the position where the paper sheet is retained is sandwiched between the fixing unit 80 or between the fixing unit 80 and the paper discharge unit 90 or the paper tray 102 has been partially exposed, the toner can be directly smashed. The 300 is taken out and the swing arm 77 is pushed open by the movable stopper 78 to cut off the power connection between the gear 73 and the gear 74.

Referring to Figures 12 to 15, another embodiment of the swing arm 77', the movable member 78' and the elastic member 79' is shown in the present invention. The swing arm 77' guiding portion 772' is an annular surrounding wall protruding from the second side surface 775 and has a curved outer wall surface 773. The movable blocking member 78' includes a first segment 781 and a first angle connected to each other. In the second segment 782, the movable member 78' is set at a position between the first segment 781 and the second segment 782, and the second segment 782 has an arcuate shape. The elastic member 79' is a torsion spring in the second preferred embodiment, which is sleeved at the pivoting end of the movable member 78' and has one end positioned at the second portion 782 of the movable member 78' and the other end being positioned at Inside the outer casing 100.

When the printing device is in the working state or standby state, the toner cartridge 300 The positioning portion 310 is in contact with the first segment 781 of the movable blocking member 78' such that the second segment 782 end 783 of the movable blocking member 78' is at a lower position of the curved outer wall surface 773 and the movable blocking member 78' is entirely in the first position. A position at which time the pivoting ability of the movable member 78' is restricted due to the pushing action of the positioning portion 310, so that the elastic member 79' is in a compressed state.

Referring to FIG. 12 to FIG. 15, when the printing device is jammed, the toner cartridge 300 is taken out, that is, the positioning portion 310 is removed, which makes the elastic force of the elastic member 79' in the working state obtained. Released, the movable blocking member 78' is pivoted, and while pivoting, the end 783 of the second segment 782 of the movable blocking member 78' is also slid along the guiding portion 772' to its curved outer wall surface 773. The position is such that the movable member 78' is entirely in the second position to push the swing arm 77', and the interlocking gear 73 is separated from the gear 74, thereby breaking the gear link of the entire transmission system, and also achieving the purpose of reducing the resistance, and facilitating the removal of the Card paper.

Similarly, in this preferred embodiment, if the paper is sandwiched between the fixing unit 80 as shown in FIG. 4 or between the fixing unit 80 and the paper discharge unit 90, or the paper tray has been partially exposed. In the case of the state of 102, when the paper is drawn in the direction in which the paper is fed along the transmission system 400, the gear 74 is oscillated by the inertia moment during the driving of the gear 73 by the gear 74, and the gear 73 is driven away. The way of the gear 74.

In the present invention, the fixing unit 80, the paper discharge unit 90, and the gear 74 may also be classified as a first transmission group, and the gear 74 is a first gear of the first transmission group, the paper feeding unit 10, and the photosensitive drum unit. 70 other than the gear 74 can be classified as a second transmission group, and the gear 73 is the second transmission. A second gear of the set, the gear 71 is a third gear of the second transmission group, and the swing arm 77 is oscillated by the inertia moment generated by the different gear transmission directions to control the meshing and separation of the gear 73 and the gear 74. When the gear 73 is separated from the gear 74, the power connection between the first transmission group and the second transmission group can be cut off, whereby the power connection of the transmission system 400 can be cut off even if the toner cartridge 300 is not taken out. Reduce the resistance when the paper is pulled out. Of course, in other embodiments, the position at which the transmission system 400 is severed may not be at a position between the gear 73 and the gear 74.

In addition, in the printing device of the present invention, the movable member 78 affected by different external forces can relatively change the position of the swing arm 77, thereby changing the meshing state of the gear 73 and the gear 74 in the gear set. The power connection of the entire transmission system 400 is broken, and the jammed paper is taken out. As in the first preferred embodiment, the external force received by the movable member 77 is the elastic force provided by the elastic member 79 and the thrust of the positioning portion 310 of the toner cartridge 300, and in the second embodiment, the external force is The elastic force provided for the elastic member 79' and the thrust of the positioning portion 310 of the toner cartridge 300.

It should be noted that the printing device for releasing the jam described in the present invention is not limited to the case described in the present specification, and the same can be achieved for the other units of the printing device or other similar requirements. efficacy.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

100‧‧‧ Shell

101‧‧‧ input tray

102‧‧‧Output tray

300‧‧‧Toner

310‧‧‧ Positioning Department

400‧‧‧Drive system

500‧‧‧Motor gear

10‧‧‧Feed unit

11, 12‧‧‧ paper take-up roller

121‧‧‧Small diameter gears

13, 14‧‧‧ gears

131, 141, 151‧‧‧ small diameter gears

15, 16‧‧‧ Transport roller

70‧‧‧Drum unit

71~74‧‧‧ Gears

711, 721, 751‧‧‧ small diameter gears

75, 76‧‧‧Drum roller

77, 77’ ‧ ‧ arm

770‧‧‧Second pivotal end

771‧‧‧First pivot end

772‧‧‧Director

772’‧‧‧Director

772a‧‧‧ first end

772b‧‧‧ second end

773‧‧‧ Curved outer wall

774‧‧‧ first side

775‧‧‧ second side

776‧‧‧ Ontology

78,78’‧‧‧ Activity Brackets

780‧‧‧Contacts

781‧‧‧ first paragraph

782‧‧‧ second paragraph

79,79’‧‧‧Flexible components

80‧‧‧Fixing unit

81~83‧‧‧ Gears

821‧‧‧Small diameter gears

831‧‧‧Small diameter gears

84, 85‧‧‧Fixing Roller

841‧‧‧ Large diameter gear

90‧‧‧Extraction unit

91~95‧‧‧ Gears

96, 97‧‧‧ paper exit roller

961‧‧‧Small diameter gears

FIG. 1 is a schematic view showing the state of the fixing module when the toner cartridge is taken out in the US Pat. No. 6,681,090; FIG. 2 is a schematic view showing the state of the fixing module when the toner cartridge is loaded in the US Pat. No. 6,681,090; 3 is a printing device disclosed in US Pat. No. 7,116,926; FIG. 4 is a schematic structural view of a preferred embodiment of the present invention; FIG. 5 is a schematic structural view of another preferred embodiment of the present invention; A partial exploded view of a preferred embodiment; FIG. 7 is a partial transmission diagram of a preferred embodiment of the present invention; FIG. 8 and FIG. 9 are schematic views of a preferred embodiment of the present invention; FIG. 10 and FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 12 and FIG. 13 are schematic views of still another preferred embodiment of the present invention; FIG. 14 is a view showing that the power connection of the first transmission group and the second transmission group has not been cut. FIG. 15 is a schematic view showing the power connection of the first transmission group and the second transmission group being cut.

100‧‧‧ Shell

75, 76‧‧‧Drum roller

101‧‧‧ input tray

77‧‧‧ swing arm

102‧‧‧Output tray

78‧‧‧Active parts

400‧‧‧Drive system

79‧‧‧Flexible components

500‧‧‧Motor gear

80‧‧‧Fixing unit

10‧‧‧Feed unit

81~83‧‧‧ Gears

11, 12‧‧‧ paper take-up roller

821‧‧‧Small diameter gears

121‧‧‧Small diameter gears

831‧‧‧Small diameter gears

13, 14‧‧‧ gears

84, 85‧‧‧Fixing Roller

131, 141, 151‧‧‧ small diameter gears

841‧‧‧ Large diameter gear

90‧‧‧Extraction unit

15, 16‧‧‧ Transport roller

91~95‧‧‧ Gears

70‧‧‧Drum unit

96, 97‧‧‧ paper exit roller

71~74‧‧‧ Gears

961‧‧‧Small diameter gears

711, 721, 751‧‧‧ small diameter gears

Claims (10)

A printing device comprising: a casing having a paper feed tray and a paper output tray; an image forming unit disposed in the outer casing; a motor disposed in the outer casing; and a transmission system disposed in the outer casing And between the paper feed tray and the paper output tray, the transmission system is configured to transmit power of the motor, the transmission system comprises: a first transmission group, including a first gear, a second transmission group, including a second gear, a third gear meshing with the second gear, and a swing arm, the swing arm having a first pivot end pivotally connected to the second gear and a first pivotal connection with the third gear a second pivoting end, and the second gear meshes with the first gear, the swing arm can be oscillated to disengage the second gear from the first gear, and the power of the first transmission group and the second transmission group is cut off Connecting, wherein the printing device further comprises a movable blocking member, the swing arm has a guiding portion, and when the movable blocking member is in a first position, the first gear is kept in mesh with the second gear when the movable block The piece is in a second position, and the movable member and the swing arm are guided Contacting and forcing the swing arm to interlock the second gear to be separated from the first gear to cut off the power connection between the first transmission group and the second transmission group; the swing arm is between the movable gear and the gears The swing arm further has a body having a first side facing the gears and a second side facing the movable member, the first pivoting end and the second side The pivot end protrudes from the first side, and the guiding portion protrudes from the second side. The printing device of claim 1, wherein the image forming unit comprises a toner cartridge, and the toner cartridge has a positioning portion, the printing device further comprising an elastic member, the elastic member Connected between the outer casing and the movable member, when the toner cartridge is installed in the outer casing, the positioning portion abuts against the movable member and compresses the elastic member, so that the movable member is in the first position When the toner cartridge is removed from the outer casing, the positioning portion is separated from the movable blocking member, and the movable blocking member is displaced to the second position by the resilient elastic force of the elastic member. The printing device of claim 1, wherein the guiding portion has an elongated strip shape and has a first end and a second end higher than the first pivot end, the elastic member Seizing a compression spring between the outer casing and the movable member, the movable member has a contact portion corresponding to the upper portion of the guiding portion, and the movable member is at the first portion when the contact portion is adjacent to the first end a position in which the movable member is in the second position when the contact portion contacts the second end. The printing device according to claim 3, wherein the contact portion has a long rib shape. The printing device according to claim 1, wherein the guiding portion has an arcuate outer wall surface, and the movable member has a first segment and a second segment which are connected at an angle, the elastic member a torsion spring having one end positioned in the second section and the other end abutting in the outer casing, the first The ends of the two segments are in contact with the curved outer wall surface of the guide portion. The printing device of claim 5, wherein the guiding portion comprises an annular surrounding wall, the curved outer wall surface is an outer wall surface of the annular surrounding wall, and the end edge of the second section of the movable blocking member It has an arc shape. The printing device of claim 1, wherein the transmission system comprises a paper feed unit, a photosensitive drum unit, a fixing unit and a paper discharge unit, the photosensitive drum unit comprising the first gear, the a second gear and the third gear, the first transmission group further includes the paper discharge unit and the fixing unit; and the second transmission group further includes the paper feeding unit. The printing device of claim 1, wherein when the first gear is driven to rotate the second gear, the swing arm is driven by the second gear to rotate the second gear and the second gear The first gear is separated. The printing device of claim 3, wherein when the first gear is driven to drive the second gear to rotate, the swing arm is driven by the second gear to rotate the second gear and the second gear The first gear is separated. The printing device of claim 5, wherein when the first gear is driven to drive the second gear to rotate, the swing arm is driven by the second gear to rotate the second gear and the second gear The first gear is separated.