Pulse generating device, rotator module, rotational speed control device, and image forming apparatus
A pulse generating device and a technology of rotational speed, which are applied in electric speed/acceleration control, measuring device, motor control, etc., can solve the problem of decreased detection accuracy of rotational speed variation, difficulty in correctly detecting rotational speed variation, and decreased detection accuracy, etc. question
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no. 1 approach
[0078] First, a general rotational speed control device having an encoder will be described. figure 1 is a schematic diagram exemplarily showing a general rotation speed control device with an encoder. see figure 1 The rotational speed control device 1 shown includes an encoder 10, a motor 13 with a rotating shaft 13a, a gear 14, a gear 15, a rotating shaft 16, a pulse detection device 17, a control device 18, a driving device 19, and a communication device 20 . The encoder 10 includes a slit 11 x , an encoder wheel 11 , and a pulse generating part 12 .
[0079] The motor 13 is a rotating body in which a rotating shaft 11x rotates in accordance with an applied voltage or the like. The gear 14 is coaxially fixed on the rotating shaft of the motor 13 . The gear 15 and the code wheel 11 of the encoder 10 are coaxially fixed on the rotating shaft 16 . The gear 15 meshes with the gear 14 . The gear 14, the gear 15, and the code wheel 11 are substantially formed as circular ...
no. 2 approach
[0153] Figure 12 It is a schematic diagram exemplarily showing the rotational speed control device according to the second embodiment. In the first embodiment, a reduction mechanism is provided between the rotation shaft 13a of the motor 13 in the rotation speed control device 2 and the rotation shaft 16 of the code wheel 11, and the reduction mechanism includes gears 14 and 15, while the second embodiment is as follows: Figure 12 As shown, no reduction mechanism is provided in the rotation speed control device 3 , and the code wheel 11 is directly connected to the rotation shaft 13 a of the motor 13 . The structure of other parts in the rotation speed control device 3 is the same as that of the rotation speed control device 2 . Here, description of the same structural parts of the rotational speed control device 3 as those of the rotational speed control device 2 is omitted.
[0154] In the above-mentioned rotation speed control device, no deceleration mechanism is provid...
no. 3 approach
[0156] Figure 13 It is a schematic diagram exemplarily showing the rotational speed control device according to the third embodiment. Such as Figure 13 As shown, the rotation speed control device 4 of the third embodiment is equipped with a rotor assembly 50, which combines the encoder 30, the motor 13, the gear 14, the gear 15, and the rotation speed control device 2 of the first embodiment. The rotating shaft 16 is integrally formed (modularized), and these structural parts are incorporated into a single frame, or mounted on the same bracket or the same substrate to form an integrated body. The structure of other parts is the same as that of the rotation speed control device 2 . Here, description of the same structural parts of the rotational speed control device 4 as those of the rotational speed control device 2 is omitted, and the description is omitted here.
[0157] In addition, the rotating body assembly may also include the encoder 30 and the motor 13 of the rota...
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