JP2000272145A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recorder which can be reduced in size by making compact the structure of a power transmission switch for driving two objective sections individually through one drive source. SOLUTION: The recorder comprises a power transmission switch for driving two objective sections individually through one drive source wherein the power transmission switch comprises the first drive transmission gear 53 of a first drive transmission system 51 and the first drive transmission gear 63 of a second drive transmission system 61 disposed on the opposite sides of the drive shaft of the drive source, a switch member 13 oscillating between the drive transmission gear 53, 63, an oscillatory gear 17 located between the drive transmission gears 53, 63 while being fixed to the switch member and meshing the drive transmission gears 53, 63 individually through oscillation of the switch member 13 to transmit the driving force from the drive source, and means for locking the switch member under a state where the oscillatory gear is meshing any one of the first or second drive transmission gear wherein the drive transmission system 51, 61 are coupled with two objective sections being driven forward or reversely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a single drive source
The present invention relates to a recording apparatus including a power transmission switching device for individually driving two driving target units.

[0002]

2. Description of the Related Art The driving force of one driving source such as a motor is 2
In the case where the power is transmitted individually to two driving target parts and used, a power transmission switching device is provided in the middle of the driving system to switch the driving force transmission for use.

As a conventional example of a recording apparatus provided with such a power transmission switching device, for example, as disclosed in Japanese Patent Application Laid-Open No. 9-169121, a drive gear having a long dimension in the axial direction is provided on the drive source side. A first driven gear and a second driven gear are provided on the driven transmission mechanism side to communicate with different driving devices, respectively, and a driving gear is provided between the driving gear, the first driven gear and the second driven gear. There is a structure in which a slide gear that can slide in the axial direction of the drive gear while always meshing is provided. In such a structure, when the slide gear is positioned at one end in the axial direction of the drive gear, the driving force is transmitted to the first driven gear, and when the slide gear slides to the other end in the axial direction of the drive gear. , Second
The driving force is transmitted to the driven gear, and the driving transmission to the first driven gear is cut off.

Another conventional example has a structure in which a gear train for a paper feed roller and a gear train for a paper feed roller of a printer are operated to be switched via a switching device (Japanese Patent Laid-Open No. 10-129057). Patent Publication and JP-A-10-12
No. 9895). The switching device operates the switching lever by utilizing the movement of the carriage to the standby position to connect and disconnect the gear train.

[0005]

However, in the former mechanism having a slide gear, a certain size or more is required in the sliding direction of the slide gear, so that a compact power transmission switching device cannot be realized. There is a problem that the recording apparatus as a whole becomes larger.

In the latter switching device, the carriage moves to the standby position and acts on the switching lever.
The throughput becomes longer by the moving time of the carriage. In addition, since the carriage employs a structure in which the gear is slid by pressing the switching lever, the structure is complicated, and there is a problem that the apparatus becomes thick in the sliding direction of the gear.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording apparatus in which the structure of a power transmission switching device for individually driving two driven parts by one driving source is simple and compact, and which can be downsized as a whole. is there.

[0008]

According to a first aspect of the present invention, there is provided a recording apparatus having a power transmission switching device for individually driving two driven parts by one driving source. Wherein the power transmission switching device comprises: a first drive transmission gear of a first drive transmission system and a first drive transmission gear of a second drive transmission system located on both sides of the drive shaft of the drive source; A switching member swingable between a first drive transmission gear of a first drive transmission system and a first drive transmission gear of a second drive transmission system; and a switching member attached to the switching member, between the two drive transmission gears. And the first member is moved by the swing of the switching member.
A swing gear that meshes with the second drive transmission gear and transmits the driving force from the drive source, and the swing gear meshes with one of the first and second drive transmission gears. And a lock means for fixing the switching member in a state in which the first drive transmission system and the second drive transmission system are connected to two driven parts to be driven forward and reverse, respectively. It is characterized by the following.

According to the present invention, the oscillating gear oscillates between the first drive transmission gear of the first drive transmission system and the first drive transmission gear of the second drive transmission system. Can be individually transmitted to the first drive transmission system and the second drive transmission system. As a result, the structure of the power transmission switching device for individually driving the two driven parts with one drive source can be made simple and compact, and the overall size of the recording apparatus can be reduced. Further, when the switching member is locked by the locking means, even if the swing gear rotates in any of the clockwise and counterclockwise directions, that is, whether the rotation gear rotates forward or backward, each of the drive transmission systems is rotated. There is no separation from the first drive transmission gear. Therefore, it is possible to realize a recording apparatus that does not have a risk of gear disengagement or tooth skipping.

According to a second aspect of the present invention, in the recording apparatus according to the first aspect, the switching member comprises:
It is swingable with the base end on the drive shaft side as a fulcrum, and has a part of the circumference as its outer peripheral edge, and the locking means can be locked on a part of the outer peripheral edge of the switching member. It is characterized by having. According to the present invention, as the switching member swings on the free end side with the base end on the drive shaft side as a fulcrum, the outer peripheral edge of the swing gear moves along a circular locus. The locking means is locked on a part of the outer peripheral edge in the middle of the movement trajectory of the outer peripheral edge to fix the position of the swing gear attached to the switching member.

According to a third aspect of the present invention, in the recording apparatus according to the first or second aspect, the power transmission switching device includes a sun gear meshing with a drive shaft of the drive source, The swing gear is a planetary gear that revolves around a part around the sun gear.
According to the present invention, the sun gear is rotated by the rotation of the drive shaft, and accordingly, the swing gear revolves around the sun gear as a planetary gear until the sun gear meshes with the first drive transmission gear of one of the drive transmission systems. I do. When the drive shaft rotates in the reverse direction, the oscillating gear revolves around the sun gear in the reverse direction until it meshes with the first drive transmission gear of the other drive transmission system.
As a result, power transmission from one drive source can be reliably switched to two drive target portions.

According to a fourth aspect of the present invention, in the recording apparatus according to any one of the first to third aspects, the first drive transmission system supplies ink from an ink storage tank for a flushing operation of a printer. It is characterized by being connected to a pump for discharging. According to the present invention, the pump is sucked when the first drive transmission gear of the first drive transmission system rotates forward, for example, and the discharge of the pump or the pipe connected to the pump is performed when the first drive transmission gear rotates reversely. The collapse due to suction can be corrected.
Thus, it is possible to prevent the trouble caused by the collapse of the pipe of the recording apparatus.

According to a fifth aspect of the present invention, in the recording apparatus of the first aspect, the second drive transmission system is connected to a paper feed roller of a printer. It is a feature. According to the present invention, the normal rotation and the reverse rotation of the paper feed roller of the printer can be controlled, and thereby, the paper feeding state in the recording apparatus can be accurately adjusted.

According to a sixth aspect of the present invention, in the recording apparatus according to any one of the first to fifth aspects, the locking means is related to a locking receiving portion formed on the switching member. The locking means has at least one flat side surface, and the locking receiving portion of the switching member has a flat side surface which can come into contact with the flat side surface of the locking means. It is characterized in that various side surfaces are formed. According to the present invention, the flat side surface of the locking means comes into contact with the flat side surface of the locking receiving portion on the entire surface, so that the swinging of the switching member can be reliably locked. Thereby, the reliability of the power transmission switching of the recording apparatus can be improved.

According to a seventh aspect of the present invention, in the recording apparatus according to the sixth aspect, the locking receiving portions are formed at both ends of an outer peripheral edge of the switching member, and the switching means is provided on the locking means. Is characterized in that the flat side surfaces of each of the locking receiving portions are formed with two opposing flat side surfaces which can come into contact with each other. According to the present invention, when the switching member swings to the left, the flat surface on the left side of the locking means comes into contact with the entire flat surface of the locking receiving portion on the right side to perform locking. When the member swings to the right, the right flat side surface of the locking means contacts the flat side surface of the left locking receiving portion over the entire surface to perform locking.

According to an eighth aspect of the present invention, in the recording apparatus of the sixth or seventh aspect, the locking means has a flat lower surface, and the locking receiving portion has a flat lower surface. A receiving surface is formed so that the lower surface and the surface of the locking means can come into contact with each other.
According to the present invention, the flat lower surface of the locking means comes into contact with the receiving surface of the locking receiving portion face-to-face, so that the locking means fits inside the locking receiving portion, and more secure. Locking can be realized.

According to a ninth aspect of the present invention, in the recording apparatus according to any one of the sixth to eighth aspects, the lock means is constantly urged toward the lock receiving portion, The unlocking of the locking means from the locking receiving portion is operated by a solenoid. According to the present invention, the locking means always keeps locking in the locking receiving portion, so that more secure locking can be realized, and the lock can be released only when necessary by operating the solenoid. .

According to a tenth aspect of the present invention, there is provided a recording apparatus according to any one of the first to fifth aspects,
The power transmission switching device includes the drive source, at least a first drive transmission gear of the first drive transmission system, at least a first drive transmission gear of the second drive transmission system, the switching member, the swing gear, and the sun. The gear and the lock means are unitized as a whole. According to the present invention, the assembling operation can be completed in a short time only by incorporating the unitized power transmission switching device into the recording device as it is.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of a power transmission switching device portion of a recording device in which a power transmission switching device according to an embodiment of the present invention is incorporated, and the power transmission switching device is connected to a first drive transmission system. Front view showing the situation, FIG. 2
Is a front view showing a state in which the power transmission switching device is connected to the second drive transmission system. FIG. 3 is a view seen from a motor (drive source) side in a state where the power transmission switching device is incorporated in the recording device. It is a principal part perspective view.

As shown in FIGS. 1 and 2, the power transmission switching device 1 is unitized by incorporating various members into a base plate 3. That is, the base plate 3
A motor 5 (indicated by a dashed line in the figure) is attached as a power source to the rear side at the center. Motor 5
A pinion 7 is attached to the output shaft of
And the sun gear 9 is meshed. The sun gear 9 is attached to the base plate 3, and an inner gear 11 is integrally formed inside the sun gear 9.

A switching lever 13 having the same swing axis as the rotation axis of the sun gear 9 is mounted between the sun gear 9 and the base plate 3. The switching lever 13
A planetary gear 17 which is a swing gear is attached to the vicinity of the outer peripheral edge 15. The planetary gear 17 meshes with the inner gear 11. The switching lever 13 has a shape resembling a sector with a central angle of substantially 90 degrees, and a locking notch 19 cut out in a substantially hook shape is provided at both ends of an outer peripheral edge 15 thereof. It is formed as. A base end serving as a swing fulcrum of the switching lever 13 is pivotally supported with the sun gear 9 and a common axis.

As shown in FIGS. 6 and 7, the outer peripheral edge 15 of the switching lever 13 is formed in an arc shape, and its cross section is formed in a rounded convex shape. In the present embodiment, the lock receiving portions 19 are formed so as to cut out both ends of the switching lever 13, respectively. However, as shown in FIG. Alternatively, the lock receiving portion may be formed so as to protrude from the surface of the switching lever 13 so as to lock with a locking protrusion (not shown) which will be described later.

On the other hand, a trigger solenoid 21 is attached to the upper part of the base plate 3, and a plunger 25 having a contact part 23 formed at the tip is provided at the lower end thereof. The plunger 25 is provided with the trigger solenoid 2
1 is retracted when the switch is ON. As shown in FIGS. 4 and 5, a trigger lever 27 is provided behind the plunger 25, and an upper protruding portion 24 is provided on the front end side of the trigger lever 27 so as to sandwich the contact portion 23 of the plunger 25 from above and below. And lower projection 26
Are formed. On the lower surface side of the lower protruding portion 26, a locking projection 28 having a shape to be locked in the locking notch 19 of the switching lever 13 is formed as locking means.

As shown in FIG. 6 and FIG.
8 has flat side surfaces 29 formed on both sides thereof. When the locking projections 28 are locked in the locking notches 19, the side surfaces 29 are in contact with the side surfaces 30 of the locking notches 19. The whole surface comes into contact. Thereby, the locking projection 2
Even when the switching lever 13 receives a force that swings in the direction of the arrow indicated by the reference numeral 31 when the locking lever 8 is locked in the locking notch 19, the entire side surface of the locking protrusion 28 is Since this force can be received, the swing of the switching lever 13 can be reliably prevented.

As shown in FIGS. 6 and 7, the lower surface 32 of the locking projection 28 is flat.
Is locked in the locking notch 19, the lower surface 32
Are in contact with the receiving surface 33 of each locking notch 19 over the entire surface. Thereby, as shown in FIG. 7, when the locking projection 28 is locked in the locking notch 19,
The locking projection 28 fits exactly into the locking notch 19, so that the locking projection 28 does not wobble in the locking notch 19. Thus, the switching lever 13 can be securely fixed.

As described above, since the outer peripheral edge 15 of the switching lever 13 is formed in an arc shape and its cross section is formed in a rounded convex shape, the lower surface 32 of the locking projection 28 is formed. Is in contact with the outer peripheral edge 15 of the switching lever 13, the switching lever 13 is kept in a state in which the frictional force between the switching lever 13 and the lower surface 32 of the locking projection 28 is minimized.
Can swing smoothly. The necessity of the locking projection 28 as the locking means will be described later.

Next, returning to FIGS. 3 and 4, the trigger lever 27 is supported so as to be rotatable up and down around a pivot 41, and between the spring locking portion 43 of the base plate 3 and the trigger lever 27. Is always urged downward by the action of the coil spring 45 connected to the coil.

With the above structure, the switching lever 13 swings left and right, so that the planetary gears 17 are driven by the first drive transmission systems 51 provided on the left and right sides of the base plate 3 around the pinion 7 of the motor. And the second drive transmission system 6
1 or can be connected individually. In the present embodiment, any of the drive transmission systems 51 and 61
Also communicates with the drive target of the printer, which is a recording device. Hereinafter, these drive transmission systems 51 and 61 will be described.

First, the first drive transmission system 51 provided on the left side of the base plate 3 is connected to a drive system for discharging ink from an ink storage tank for a so-called flushing operation. That is, in the ink jet printer, in order to maintain the ink ejection accuracy at the time of continuous printing, an ink ejection operation is performed into an ink storage container (not shown) at regular time intervals other than for printing purposes. The ink in the ink storage container must be discharged by a pump before overflowing. As shown in FIGS. 1 and 2, the first drive transmission system 51 is a transmission system of a driving force to a pump drive gear 58 for driving the ink discharge pump (not shown) as a drive target. is there. Reference numeral 56 indicates a pump drive shaft.

As shown in FIGS. 1 and 2, the first drive transmission system 51 includes a pump transmission gear 53 meshable with the planetary gear 17 (a first drive transmission gear in the first drive transmission system 51).
And a first intermediate gear 55 meshing with the pump transmission gear 53
And a second intermediate gear 57 and a third intermediate gear 59 following this.
And The pump transmission gear 53 and the first intermediate gear 55 are unitized as a part of the power transmission switching device 1 and are incorporated in the base plate 3. Also, as shown in FIGS. 1 and 2, the first drive transmission 51
Is formed so that power can be transmitted from the second intermediate gear 57 to the carriage lock lever 47 via the two gears 52 and 54 so that the carriage can be switched between locked and released.

On the other hand, a second drive transmission system 61 provided on the right side of the base plate 3 is for driving a paper feed roller (not shown) as a drive target, and an ASF transmission capable of meshing with the planetary gear 17. Gear 63 (first of the second drive transmission system)
Drive transmission gear) and an ASF drive gear 65 meshing therewith.
And The ASF drive gear 65 is provided on the shaft 64 of the paper feed roller. The ASF transmission gear 63
Are mounted on the base plate 3 as a part of the power transmission switching device 1 and are unitized.

The ink discharge pump and the paper feed roller connected to the first and second drive transmission systems 51 and 61 both need to be driven in both forward and reverse directions. The two drive transmission systems 51 and 61 need to be mechanisms for transmitting drive by rotating forward and backward, respectively. In the present invention, the locking projection 28 serving as a locking means plays a role of enabling the forward rotation and the reverse rotation.

That is, when the planetary gear 17 meshes with the pump transmission gear 53 as shown in FIG. 1, if the sun gear 9 rotates counterclockwise, the planetary gear 17
Receives a force that revolves counterclockwise around the pump transmission gear 53 and constantly engages with the pump transmission gear 53. However, conversely, if the sun gear 9 rotates clockwise while the planetary gear 17 meshes with the pump transmission gear 53, the planetary gear 17 receives a force that revolves clockwise around the sun gear 9. And try to move away from the pump transmission gear 53. If the drive transmission is continued in such a state, the meshing between the gears becomes worse,
This can cause tooth skipping. Therefore, in the latter case, the locking projection 2 is provided in the locking notch 19 on the right side of the switching lever 13.
8, the planetary gear 17 and the pump transmission gear 53 can be reliably engaged by locking the switching lever 13 so as not to swing. As described above, flat side surfaces 29 are formed on both sides of the locking projection 28, and the lower surface 32 is also flattened so that the locking projection 28 fits into the locking notch 19. By doing so, such a locked state of the switching lever 13 becomes more reliable.

The planetary gear 17 is connected to the ASF transmission gear 63.
Similarly, when the sun gear 9 rotates counterclockwise when the gears are in mesh with each other, the planetary gear 17 receives a force that revolves around the sun gear 9 counterclockwise, and the ASF transmission gear 53
Therefore, the locking projection 28 is locked in the locking notch 19 on the left side of the switching lever 13 so that the switching lever 13 is locked so as not to swing.

Next, the operation control of the power transmission switching device 1 will be described. In this embodiment, the switching lever 13 is connected to the first drive transmission system 5 in the initial state in any case.
1, that is, connected to the ink discharge pump side. Therefore, assuming that the switching lever 13 is located on the second drive transmission system 61 side, an initial operation of shifting the switch lever 13 to the first drive transmission system 51 side is performed. In this operation, first, when the locking projection 28 is locked in the locking notch 19 on the left side of the switching lever 13, the switching lever 13 is temporarily set to AS to prevent the biting state.
A five-step feeding operation is performed so as to drive to the F transmission gear 63 side. In this state, the trigger solenoid 21 is turned on to release the lock of the switching lever 13.

Next, the motor 5 is driven to perform a 65-step feeding operation, and the switching lever 13 is swung to the left so that the planetary gear 17 meshes with the pump transmission gear 53.
In this state, the trigger solenoid 21 is turned off, and the locking projection 28 is locked in the locking notch 19 by the action of the coil spring 45 to lock the switching lever 13. At this time, the side surface 29 of the locking projection 28 is engaged with the locking notch 19.
And the lower surface 32 of the locking projection 28
Abuts on the receiving surface 33 of the locking notch 19 over the entire surface,
Lock is assured.

The planetary gear 17 and the pump transmission gear 53
In order to ensure the meshing state with the above, a further 15-step feed operation in the same direction is performed. Further, the motor is driven in the same direction as the above-mentioned five steps to perform a total of 110 steps of the feeding operation, so that the pump is connected to the pump.

It should be noted that the above operation is performed by first switching the switching lever 13.
Is assumed to be located on the second drive transmission system 61 side, and when the switching lever 13 is originally on the first drive transmission system 51 side, the pump is sucked by the drive of the motor, The tube to the pump is in a crushed state. Therefore, the motor is appropriately driven in the opposite direction so as to return to the original state, and the total number of the above steps (the case where the number of steps in one direction is plus and the number of steps in the opposite direction is minus) (Total number of steps) is set to 0. By the above initial operation, the pump mode flag is set, and the pump mode is turned on.

When driving the ink discharge pump, the first drive transmission system 5 can be driven by driving the motor in this state.
The driving force is transmitted to the pump via 1. When the paper feed roller was driven, the lock of the switching lever 13 was released, the motor was rotated in the reverse direction, the switching lever 13 was swung to the right, and the planetary gear 17 was meshed with the ASF transmission gear 63. What is necessary is just to drive a motor in a state.

[0040]

According to the present invention, the oscillating gear oscillates between the first drive transmission gear of the first drive transmission system and the first drive transmission gear of the second drive transmission system. The driving force from the source can be separately transmitted to the first drive transmission system and the second drive transmission system. As a result, the structure of the power transmission switching device for individually driving the two driven parts with one drive source can be made simple and compact, and the overall size of the recording apparatus can be reduced. Further, by locking the switching member by the locking means, even if the swing gear rotates in any of the clockwise and counterclockwise directions, that is, whether the rotation gear rotates forward or backward, There is no separation from the first drive transmission gear. Therefore, it is possible to realize a recording apparatus that does not have a risk of gear disengagement or tooth skipping.

Further, by adopting a structure in which a swing gear is attached to a swingable switching member to selectively switch between two drive transmission paths, the structure is relatively simple, planar and compact. A highly reliable power transmission switching device can be provided. As a result, the entire switching device can be flattened,
The power transmission switching device can be unitized, and the assembly operation can be completed in a short time only by incorporating the unitized device into the recording device as it is.

Further, according to the present invention, the flat side surface of the locking means comes into contact with the flat side surface of the locking receiving portion on the entire surface, so that the switching member can be reliably locked. Further, a flat lower surface is formed on the locking means, which can be brought into contact with the receiving surface of the locking receiving portion, so that the locking means is fitted into the locking receiving portion, and a more secure locking is achieved. Can be realized.

[Brief description of the drawings]

FIG. 1 shows a main part of a power transmission switching device portion of a recording apparatus incorporating a power transmission switching device according to an embodiment of the present invention, wherein the power transmission switching device is connected to a first drive transmission system. It is a front view showing a situation.

FIG. 2 is a front view showing a state where the power transmission switching device is connected to a second drive transmission system.

FIG. 3 is a perspective view of a main part of the power transmission switching device in a state where the power transmission switching device is incorporated in a recording device, as viewed from a motor (drive source) side.

FIG. 4 is a side view of the power transmission switching device to which the present invention is applied, viewed from a first drive transmission system side, and shows a state in which a locking projection is locked in a locking notch; .

FIG. 5 is a side view of the power transmission switching device to which the present invention is applied, viewed from a first drive transmission system side, and shows a state in which a trigger solenoid is operated and a lock by a locking projection is released. .

FIG. 6 is a diagram illustrating a state before the locking projection is locked to the locking notch when the switching lever is positioned on the first drive transmission system side.

FIG. 7 is a view showing a state in which a locking projection is locked to a locking notch in a state where the switching lever is positioned on a first drive transmission system side.

FIG. 8 is a view showing another embodiment of the lock receiving portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power transmission switching device 3 Base plate 5 Motor 7 Pinion 9 Sun gear 11 Inner gear 13 Switching lever 15 Outer rim 16 Lock receiving part 17 with a part of outer rim recessed 17 Planetary gear 19 Lock notch 21 Trigger solenoid 27 Trigger Lever 28 Locking projection 29 Side surface of locking projection 30 Side surface of locking notch 32 Lower surface of locking projection 33 Receiving surface of locking notch 47 Carriage lock lever 51 First drive transmission system 53 Pump transmission Gear 56 Pump drive shaft 58 Pump drive gear 61 Second drive transmission system 63 ASF transmission gear 64 Feed roller shaft 65 ASF drive gear

Claims (10)

[Claims] 1. A recording apparatus comprising a power transmission switching device for individually driving two driving target portions by one driving source, wherein the power transmission switching device is provided on both sides of a driving shaft of the driving source. , The first drive transmission gear of the first drive transmission system and the first drive transmission gear of the second drive transmission system, and the first drive transmission gear of the first drive transmission system and the first drive transmission gear of the second drive transmission system.
A switching member capable of swinging between the drive transmission gears, and a switching member attached to the switching member and positioned between the two drive transmission gears to swing the first and second drive transmission gears by swinging the switching member; An oscillating gear that meshes individually to transmit the driving force from the drive source, and the switching member in a state where the oscillating gear meshes with one of the first and second drive transmission gears. Wherein the first drive transmission system and the second drive transmission system are respectively connected to two drive target units that are driven forward and reverse. . 2. The locking means according to claim 1, wherein the switching member is swingable with a base end on the drive shaft side as a fulcrum, and has a part of a circumference as an outer peripheral edge thereof. A recording device which can be locked to a part of an outer peripheral edge of the switching member. 3. The power transmission switching device according to claim 1, further comprising a sun gear meshing with a drive shaft of the drive source, wherein the oscillating gear revolves around a part around the sun gear. A recording device comprising a planetary gear. 4. The printer according to claim 1, wherein the first drive transmission system is connected to a pump for discharging ink from an ink storage tank for a flushing operation of the printer. Recording device. 5. The paper feed roller according to claim 1, wherein the second drive transmission system is connected to a paper feed roller for sequentially feeding paper set in a paper feed unit of the printer in a recording head direction. A recording device, comprising: 6. The locking device according to claim 1, wherein the locking device is configured to be lockable on a locking receiving portion formed on the switching member, and the locking device includes at least one locking device. A recording apparatus, wherein a flat side surface is formed, and a flat side surface capable of contacting the flat side surface of the locking means with each other is formed in a locking receiving portion of the switching member. 7. The switching member according to claim 6, wherein the locking receiving portions are formed at both ends of an outer peripheral edge of the switching member, and the locking means can be brought into contact with the flat side surfaces of the locking receiving portions. A recording apparatus, wherein two opposing flat side surfaces are formed. 8. The locking means according to claim 6, wherein the locking means has a flat lower surface, and the locking receiving portion has a receiving surface which can be in contact with the lower surface of the locking means. A recording apparatus characterized in that it is performed. 9. The locking device according to claim 6, wherein said locking means is constantly urged toward said locking receiving portion, and release of said locking means from said locking receiving portion is performed by a solenoid. A recording device which is operated by a computer. 10. The power transmission switching device according to claim 1, wherein the power transmission switching device includes at least a first drive transmission gear of the first drive transmission system and at least a first drive transmission gear of the second drive transmission system. The recording apparatus according to claim 1, wherein the drive transmission gear, the switching member, the swing gear, the sun gear, and the lock unit are unitized as a whole.