JP2534670B2 - Recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus, and more particularly to a recording apparatus including a timing belt as a driving force transmission member for serially moving a carriage.

[Prior Art] Conventionally, a timing belt is generally used in many cases in this type of carriage driving device, but in such a device, backlash tends to occur between the timing belt and the belt driving pulley and between the driving gears. However, if there is backlash, the position of the carriage becomes so unstable that it slightly affects the recording operation. Such a problem is caused by the fact that the tooth belt pitch of the timing belt does not match the tooth pit of the driving pulley or the meshing state between the driving gears is incorrect, which causes noise and damage. The gear sometimes stops without operating, or the meshing state jumps by one tooth and shifts.

So, regarding the various adjustments that have been performed conventionally,
For example, to adjust the tension of the belt, provide a pulley for tension adjustment between the drive pulley and the guide pulley,
Means have been taken, such as moving the guide pulley position or allowing the length of the belt itself to be adjusted.

Further, in order to prevent backlash, means such as inserting silicon paper or aluminum foil between gears to adjust the axial distance of the gears is taken.

However, such a conventional adjusting mechanism is not very effective because the structure tends to be complicated, the cost is high, and the adjusting method is difficult.

[Problems to be solved by the invention]

In view of the above-mentioned problems, the object of the present invention is to solve the problems by an extremely simple structure, a small number of parts for adjustment, inexpensive, and automatic adjustment of the belt tension, as well as suppression of backlash. It is to provide a recording device.

[Means for solving problems]

In order to achieve such an object, the present invention provides a carriage that is serially moved while being held by a driving force transmission member that is stretched between a drive pulley and a guide pulley that is displaceable in a direction away from the drive pulley. In a recording apparatus including: a first gear that is axially supported coaxially with the drive pulley, and between the drive pulley and the guide pulley for supplying a driving force from a drive source to the first gear. The second gear provided at a position meshable with the first gear, the drive pulley and the first gear are pivotally supported, and the first gear is arranged in a direction in which the first gear can be brought into contact with and separated from the first gear. An oscillating member for displacing and the guide pulley are displaced in a direction away from the drive pulley to apply tension to the drive force transmitting member, and the first gear is in a meshing position with the second gear. Bias to Ku and having a an elastic member which is used to displace the swinging member through said driving force transmission member.

[Action]

According to the present invention, tension is applied to the driving force transmitting member by the elastic member, and the elastic member is driven by the spring force of the elastic member so as to reliably supply the driving force from the driving source to the first gear coaxial with the driving pulley. It is possible to displace the swinging member via the force transmitting member and bias the first gear toward the meshing position with the second gear for supplying the driving force, thereby suppressing backlash during that period.

〔Example〕

The embodiments of the present invention will be described in detail and specifically above with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Here, 1 is a carriage on which the recording head 2 is mounted, 3 has a tooth profile inside thereof, and timing as a driving force transmission member stretched between a drive pulley 4 and a guide pulley 5 around which the same tooth profile is provided. It is a belt, and both ends of the timing belt 3 are fixed to the fixing portion 3A of the carriage 1. 6 is a pulley drive gear (first gear) provided coaxially with the drive pulley 4 on the rotating shaft 7,
Reference numeral 8 is a gear (second gear) that meshes with the first gear 6 and is driven by a motor (not shown).

Here, the rotary shaft 7 of the drive pulley 4 and the drive gear 6 is attached to a support member (swing member), and the support member 9 is rotatably supported around the support shaft 11 attached to the frame 10. The drive gear 6 is biased toward the motor-side gear 8 by the spring force of a later-described spring on the guide pulley 5 side. 9A is a sliding contact groove provided on the support member 9,
Is a pin fixed to the frame 10 and fitted in the sliding contact groove 9A to hold the support member 9 swingably.

Reference numeral 13 is a second pulley supporting member to which the rotary shaft 14 of the guide pulley 5 is attached. The supporting member 13 is swingably supported by the supporting member 15, and the spring force of the tension coil spring 16 causes the guide pulley 5 to rotate. 5 is given a biasing force in the direction of arrow D. 13A is a sliding contact groove, 17 is fitted in the sliding contact groove 13A,
This is a presser pin that holds 13 so that it can swing.

Describing the operation of the thus configured carriage driving device, since the guide pulley 5 is always biased in the D direction by the spring force of the coil spring 16, an appropriate tension is applied to the timing belt 3 by the biasing force. While being obtained, the drive pulley 4 and the drive gear 6 are similarly biased in the D direction via the timing belt 3, and the drive gear 6 is meshed with the gear 8 on the motor side while being pressed. Therefore, the play due to the backlash between the drive gear 6 and the gear 8 is suppressed by this, and the timing belt 3 is also appropriately tensioned so that the play between the pulleys 4 and 5 is increased. Slip is also suppressed.

In the above description, an example in which the carriage is driven by the timing belt has been described, but the application of the present invention is not limited to such a timing belt, and similar effects can be obtained even in the case of wire driving. Needless to say, can be obtained.

〔The invention's effect〕

As described above, according to the present invention, the driving force transmission member stretched between the driving pulley and the guide pulley displaceable in the direction away from the driving pulley holds the driving force and moves serially. In a recording apparatus including a carriage, a first gear axially supported coaxially with the drive pulley and a gap between the drive pulley and the guide pulley for supplying a driving force from a drive source to the first gear. A second gear provided at a position meshable with the first gear, the drive pulley and the first gear, and a direction in which the first gear can be brought into and out of contact with the second gear. An oscillating member for displacing the guide pulley and the guide pulley in a direction in which the guide pulley is separated from the drive pulley to apply tension to the drive force transmitting member, and the first gear meshes with the second gear. Biased into position Therefore, since the elastic member used for displacing the swinging member via the driving force transmitting member is provided, the tension of the driving force transmitting member can be automatically adjusted and the backlash in the driving gear can be suppressed. The carriage can always be moved to the correct position.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of the configuration of the carriage driving device of the present invention. 1 ... Carriage, 3 ... Timing belt, 4 ... Drive pulley, 5 ... Guide pulley, 6 ... Drive gear, 8 ... Gear, 9,13 ... Support member, 11,15 ... Support shaft, 16 …… Coil spring.

Claims (3)

(57) [Claims] 1. A recording apparatus including a carriage that is held by a driving force transmission member stretched between a drive pulley and a guide pulley that is displaceable in a direction away from the drive pulley and that moves serially. A first gear coaxially supported by the drive pulley, and a driving force from a driving source, supplied to the first gear,
A second gear provided at a position meshable with the first gear between the drive pulley and the guide pulley, the drive pulley and the first gear being pivotally supported, and the first gear being the first gear. A swinging member for displacing the gear in a direction in which the gear can be brought into contact with and separated from the first gear; An elastic member used for displacing the swinging member via the driving force transmission member so as to bias the first gear to the meshing position of the second gear. 2. The recording device according to claim 1, wherein the driving force transmitting member is a timing belt having a supporting portion which can be meshed with a tooth portion provided on an outer peripheral surface of the driving pulley. apparatus. 3. The recording apparatus according to claim 1, wherein the driving force transmitting member is a wire.