Patent Application
20140033832
1. Technical Field
The present disclosure relates to a testing apparatus for testing pressing rollers of a printer.
2. Description of Related Art
A printing apparatus, such as a printer or a photocopying machine, feeds a sheet of paper from an input tray, prints an image on the sheet, and discharges the printed paper to an output tray. A duplexer module with a number of pressing rollers is used to transmit paper sheets in the printer. The pressing rollers of the duplexer module need to be tested before the printer is assembled. However, it may be difficult for the typical testing apparatus to test all of the pressing rollers due to limited space in the printer.
Therefore, there is a need for improvement in the art.
Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.”
The base 100 includes a bottom plate 110. A restriction plate 120 perpendicularly extend from each of a right side and a left side of the bottom plate 110. Each of a first fixing plate 130 and a second fixing plate 140 perpendicularly extends from each of a front side and a back side of the bottom plate 110. A restriction block 150 perpendicularly extends from the bottom plate 110 on one side of one restriction plate 120. Two first fixing slices 131 are movably installed on the first fixing plate 130. A first through hole 132 is defined on each of the two first fixing slices 131. Two first fixing portions 133 are positioned on the first fixing plate 130 corresponding to the first through holes 132. A fool proofing block 134 protrudes from the first fixing plate 130.
A second fixing slice 141 is movably installed on the second fixing plate 140. A second through hole 142 is defined on the second fixing slice 141. A second fixing portion 143 is formed on the second fixing plate 140 corresponding to the second through hole 142. A handle 144 is formed on the second fixing plate 140.
The first fixing portions 133 pass through the corresponding first through holes 132. The second fixing portion 143 passes through the second through hole 142. A plurality of first fasteners 160 are mounted on the first fixing portions 133 and the second fixing portion 143 to fix the first fixing slices 131 and the second fixing slice 141 on the first fixing plate 130 and the second fixing plate 140.
The duplexer module 300 includes a first mounting bracket 310 and a second mounting bracket 320 fixed on the first mounting bracket 310. A fool proofing slot 311 is defined in the first mounting bracket 310. Two paper pressing rollers 321 are fixed on two sides of the second mounting bracket 320. Each of the paper pressing rollers 321 are mounted on the second mounting bracket 320 by an elastic member 322.
A pressure detecting unit 230 is mounted in the opening 222 and the cutout 223. The pressure detecting unit 230 includes a disk-shaped body 231. A column-shaped signal output pin 232 extends from one side of the body 231. A sensing protrusion 233 protrudes from a top surface of the body 231. The body 231 is received in the opening 222. The signal output pin 232 extends to outside of the rotating wheel 220 from the cutout 223.
A supporting block 240 is received in each of the first slots 221. A first accommodating space 241 is defined in a bottom of the supporting block 240. A second accommodating space 242 is defined in a top of the supporting block 240. A locating slots 243 is defined on each of two sides of the second accommodating space 242. The first accommodating space 241 and the second accommodating space 242 communicate with each other. Two third through holes 244 are defined on two sides of the supporting block 240. Two third fixing holes 224 are defined on two sides of each of the first slots 221, corresponding to the two third through holes 244.
A resisting block 250 is accommodated in the first accommodating space 241 and the second accommodating space 242. The resisting block 250 includes a base plate 251. A column-shaped connecting block 252 perpendicularly extends from the base plate 251. A locating block 253 extends from each of two sides of the connecting block 252. The base plate 251 and the connecting block 252 are accommodated in the first accommodating space 241 and the second accommodating space 242 respectively. Each of the locating blocks 253 is received in each of the locating slots 243. A disk-shaped contacting block 254 is formed at a top of the connecting block 252.
The duplexer module 300 is located on the base 100. The fool proofing block 134 on the first fixing plate 130 is received in the fool proofing slot 311 on the first mounting bracket 310. The first fixing slices 131 and the second fixing slice 141 are rotated to resist against the first mounting bracket 310 and fix the duplexer module 300 on the base 100.
Two distal ends of the rotating axis 210 pass through two sides of the duplexer module 300. The rotating knob 260 is mounted on one distal end of the rotating axis 210 to fix the resisting module 200 on the duplexer module 300. The restriction bar 261 on the rotating knob 260 faces the restriction block 150 on the base 100.
In operation, the handle 144 is picked up to stand up the resisting module 200 and the duplexer module 300. The signal output pin 232 of each pressure detecting unit 230 is electrically connected to a pressure test equipment 600. The rotating knob 260 is rotated until the restriction bar 261 resists against the restriction block 150 on the bottom plate 110. The resisting block 250 on each rotating wheel 220 resists the corresponding paper pressing roller 321 by the contacting block 254. The elastic member 322 is elastically deformed. The elastic member 322 generates an elastic counterforce on the contacting block 254 by the corresponding paper pressing roller 321. The counterforce from the elastic member 322 is sensed by the sensing protrusion 233 on the pressure detecting unit 230 via the resisting block 250. The sensing protrusion 233 transmits the counterforce to the pressure test equipment 600 via the corresponding signal output pin 232. The pressure test equipment 600 displays value of the counterforce at the corresponding paper pressing roller 321 and determines whether the counterforce is normal.
Even though numerous characteristics and advantages of the present disclosure have been set forth in the foregoing description, together with details of the structure and function of the disclosure, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and the arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 101127660 | Jul 2012 | TW | national |
