CN203101820U - Spacing control mechanism - Google Patents
Spacing control mechanism Download PDFInfo
- Publication number
- CN203101820U CN203101820U CN 201320010121 CN201320010121U CN203101820U CN 203101820 U CN203101820 U CN 203101820U CN 201320010121 CN201320010121 CN 201320010121 CN 201320010121 U CN201320010121 U CN 201320010121U CN 203101820 U CN203101820 U CN 203101820U
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- CN
- China
- Prior art keywords
- developer roll
- photosensitive drums
- spacing
- control gear
- spacing control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a spacing control mechanism which comprises a photosensitive drum and a developer roller, wherein side covers are arranged at two ends of the photosensitive drum and the developer roller; the same end of the photosensitive drum and the developer roller is pivoted with the side cover on the same side; a spacing H between the surfaces of the photosensitive drum and the developer roller can be controlled to be greater than 0 and less than 0.2mm through accurate positioning of the side covers; auxiliary sleeves are oppositely mounted at two ends of the developer roller in a sleeving manner; the auxiliary sleeves are in loose fit with the developer roller; the external surface of each auxiliary sleeve is higher than the surface of a roller main body; and the height difference D between the external surface of each auxiliary sleeve and the surface of the roller main body is greater than 0 and less than H. Therefore, when the spacing between the surfaces of the photosensitive drum and the developer roller is reduced due to the vibration of the developer roller and the photosensitive drum, non-working areas at two ends of the photosensitive drum can be in contact with the auxiliary sleeves and generate rolling friction with the auxiliary sleeves, so that the spacing between the surfaces of the developer roller and the photosensitive drum can be prevented from being reduced greatly, and component damage due to the contact between the developer roller and the photosensitive drum can be prevented.
Description
Technical field
The utility model relates to a kind of laser printer, particularly a kind of spacing control gear.
Background technology
Usually, be at regular intervals non-contacting between the developer roll of non-contact laser printer and the photosensitive drum surface, but, this surface spacing is very small, approximately only less than 20 silks, thereby work as, when developer roll and photosensitive drums are passed through the gearing mesh high speed rotating of its end, can produce vibration, vibration not only can make the spacing between developer roll and the photosensitive drum surface dwindle and accumulated powder, even can make between developer roll and the photosensitive drum surface and contact, thereby be necessary to design a kind of spacing control gear and solve the problems referred to above.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of spacing control gear.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of spacing control gear, comprise photosensitive drums and developer roll, it is characterized in that: described photosensitive drums and developer roll two ends are equipped with the limit lid, and the end that photosensitive drums and developer roll are positioned at the same side articulates with the limit lid that is positioned at this side, and the spacing H of photosensitive drums and developing roller surface is 0＜H＜0.2mm, and described developer roll two ends are set with attached cover relatively, this attached cover and developer roll loose fit, and this attached cover outside surface exceeds the roller body surfaces, and its both difference in height D is 0＜D＜H.
Described photosensitive drums one end is provided with first spindle nose, and described developer roll one end is provided with second spindle nose, and described limit covers and is provided with first pilot hole and second pilot hole, and described first spindle nose is hubbed in first pilot hole, and second spindle nose is hubbed in second pilot hole.
Described developer roll two ends are respectively equipped with groove, and described attached cover is arranged in the groove.
Described attached putting is provided with limiting section.
Described limiting section is the bulge loop that is arranged at attached cover inside surface.
Described photosensitive drums one end is provided with driving gear, and described developer roll one end is provided with the follower gear with this driving gear engagement.
Described spacing H is 0.12, and described difference in height D is 0.1mm.
Be provided with at least one permanent magnet in the described photosensitive drums, the magnetic carbon dust of described developer roll surface attachment can be attached to photosensitive drum surface by the permanent magnet effect.
Described developer roll is aluminium roller or rubber rollers.
The beneficial effects of the utility model are: comprise photosensitive drums and developer roll, described photosensitive drums and developer roll two ends are provided with the limit lid, and the end that photosensitive drums and developer roll are positioned at the same side articulates with the limit lid that is positioned at this side, the spacing H that can control photosensitive drums and developing roller surface by the accurate location of limit lid is 0＜H＜0.2mm, and the developer roll two ends are set with attached cover relatively, this attached cover and developer roll loose fit, and this attached cover outside surface exceeds the roller body surfaces, and its both difference in height D is 0＜D＜H, thereby produce vibration and when spacing between developer roll and the photosensitive drum surface is dwindled when developer roll and photosensitive drums, the nonclient area at photosensitive drums two ends can at first touch attached cover, produce rolling friction with attached cover, thereby avoid the spacing between developer roll and the photosensitive drum surface significantly to dwindle, even contact, damage parts.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the synoptic diagram of photosensitive drums and developer roll.
Fig. 3 is the synoptic diagram of developer roll.
Embodiment
Referring to figs. 1 through Fig. 3, the utility model discloses a kind of spacing control gear, comprise photosensitive drums 1 and developer roll 2, described photosensitive drums 1 is provided with limit lid 3 with developer roll 2 two ends, and the end that photosensitive drums 1 and developer roll 2 are positioned at the same side articulates with the limit lid 3 that is positioned at this side, and photosensitive drums 1 is 0＜H＜0.2mm with the spacing H on the surface of developer roll 2, as a concrete preferred value, described spacing H can be 0.12, described developer roll 2 two ends are set with attached cover 4 relatively, this attached cover 4 and developer roll 2 loose fits, and these attached cover 4 outside surfaces exceed the roller body surfaces, and its both difference in height D is 0＜D＜H, thereby attached cover 4 can play the effect of the distance that keeps developer roll 2 and photosensitive drums 1.Described spacing H is 0.12, and as a concrete preferred value, described difference in height D can be 0.1mm.
In this instantiation, photosensitive drums 1 two ends are equipped with first spindle nose 5, developer roll 2 two ends are equipped with second spindle nose 6, and limit lid 3 is provided with the first pilot hole (not shown) and the second pilot hole (not shown), first spindle nose 5 is hubbed in first pilot hole, and second spindle nose 6 is hubbed in second pilot hole, thereby should hold the spacing of photosensitive drums 1 and developer roll 2 to determine by the spacing between first pilot hole and second pilot hole, said structure is wherein a kind of preferred structure of the present utility model, do not constitute restriction of the present utility model, said structure can also for, first pivot and second pivot are set on support member, then first pivot and second pivot be arranged at photosensitive drums 1 on first pilot hole and be arranged at the mode that second pilot hole on the developer roll 2 matches.
As shown in the figure, the two ends of developer roll 2 are arranged with attached cover 4 free to rotate, and these attached cover 4 outside surfaces exceed the developer roll surface, thereby developer roll 2 can be by the spacing of these attached cover 4 maintenances with photosensitive drums 1, when developer roll 2 and photosensitive drums 1 produces vibration and when spacing between developer roll 2 and photosensitive drums 1 surface is reduced, the nonclient area at photosensitive drums 1 two ends can touch attached cover 4, attached cover 4 keeps developer roll 2 little with the effect and the frictional dissipation of the distance of photosensitive drums 1 by contacting the friction force that produces with developer roll 2 with photosensitive drums 1 and rotate at random, not only can playing.
As shown in the figure, in this specific embodiment, developer roll 2 two ends are respectively equipped with the groove (not shown), described attached cover 4 is arranged in the groove, because the too thin very difficult processing of attached cover 4 thickness, and the very difficult control of precision, thereby developer roll 2 two ends are provided with groove respectively, thereby attached cover 4 improves the thickness of oneself by the groove depth of groove, thereby is convenient to processing and control accuracy.
In order to prevent that attached cover 4 from deviating from developer roll 2 in rotating at random, attached cover 4 is provided with limiting section 7, by limiting section 7 with stopping of powder storehouse inwall and spacing.In this specific embodiment, limiting section 7 is for being arranged at the extended bulge loop of attached cover 4 inside surfaces, said structure is the application's a preferred structure, and limiting section 7 also can be and is arranged at the uniform projection of attached cover 4 inside surfaces or is installed on other locating part on the attached cover 4.
Described photosensitive drums 1 one ends are provided with driving gear 8, and described developer roll 2 one ends are provided with the follower gear 9 with this driving gear 8 engagement, and driving gear 8 and first spindle nose 5 are positioned at the same end of photosensitive drums 1; And the follower gear 9 and second spindle nose 6 are positioned at the same end of photosensitive drums 1.
As shown in Figure 3, as improvement structure of the present utility model, be provided with a permanent magnet 10 in the photosensitive drums 1, this permanent magnet 10 be positioned at photosensitive drums 1 under, above-mentioned position only is an optimum position of present embodiment, certainly this permanent magnet 10 also can be positioned at other position that photosensitive drums 1 can attract the magnetic carbon dust, be provided with developer roll 2 under the photosensitive drums 1, photosensitive drums 1 is preferably 0.12mm with the spacing of developer roll 2, developer roll 2 has adopted the aluminium roller, the below of developer roll 2 also is provided with a powder feeding roller and powder storehouse, the magnetic carbon dust is housed in the powder storehouse, be provided with an elastic metallic scraper that contacts with developer roll 2 in the toner cartridge, therefore developer roll 2 and photosensitive drums 1 needn't contact and just can realize development in the developing apparatus of this structure, avoided being in contact with one another the wearing and tearing that brought and big driving torque, thereby the manufacturing accuracy that has reduced each parts has simultaneously also reduced cost of manufacture, has improved print quality.
The course of work of this device is as follows: the magnetic carbon dust is adsorbed onto on the developer roll 2 from the powder storehouse by powder feeding roller, the scraper that contacts with developer roll 2 spreads to the magnetic carbon dust uniformly very thin one deck and makes electric charge on the magnetic carbon dust band, being added with a value on developer roll 2 is 300 left and right sides voltages, this voltage can guarantee that charged magnetic carbon dust can be adsorbed onto developer roll 2 surfaces, prevents " fly powder " situation take place.
When the magnetic carbon dust is developed roller 2 and drives certain position, thereby the attraction that is subjected to the motionless permanent magnet 10 of photosensitive drums 1 internal fixation overcomes the constraint of electric field force on the developer roll 2 jumps to photosensitive drums 1 surface, because of photosensitive drums 1 surperficial non-graph area have very high and electrically with the magnetic carbon dust electrically charged electrical identical electric charge, thereby itself and magnetic carbon dust electrically chargedly can produce very big repulsive force each other and offset the magnetic field force that permanent magnet 10 and magnetic carbon dust produce, and make the magnetic carbon dust can not be adsorbed on photosensitive drums 1 surperficial non-graph area; But the voltage of the graph area after the exposure is very low, and the electric field force that is produced can't overcome the effect of magnetic field force, thereby the magnetic carbon dust can evenly be adsorbed on the graph area formation development on photosensitive drums 1 surface in photosensitive drums 1 rotating process.
Above-mentionedly just preferred embodiments more of the present utility model are illustrated and describe; but embodiment of the present utility model is not restricted to the described embodiments; as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection domain of the present utility model.
Claims (9)
1. spacing control gear, comprise photosensitive drums and developer roll, it is characterized in that: described photosensitive drums and developer roll two ends are equipped with the limit lid, and the end that photosensitive drums and developer roll are positioned at the same side articulates with the limit lid that is positioned at this side, and the spacing H of photosensitive drums and developing roller surface is 0＜H＜0.2mm, and described developer roll two ends are set with attached cover relatively, this attached cover and developer roll loose fit, and this attached cover outside surface exceeds the roller body surfaces, and its both difference in height D is 0＜D＜H.
2. a kind of spacing control gear according to claim 1, it is characterized in that: described photosensitive drums one end is provided with first spindle nose, described developer roll one end is provided with second spindle nose, described limit covers and is provided with first pilot hole and second pilot hole, described first spindle nose is hubbed in first pilot hole, and second spindle nose is hubbed in second pilot hole.
3. a kind of spacing control gear according to claim 1 is characterized in that: described developer roll two ends are respectively equipped with groove, and described attached cover is arranged in the groove.
4. a kind of spacing control gear according to claim 3 is characterized in that: described attached putting is provided with limiting section.
5. a kind of spacing control gear according to claim 4 is characterized in that: described limiting section is the bulge loop that is arranged at attached cover inside surface.
6. a kind of spacing control gear according to claim 1 is characterized in that: described photosensitive drums one end is provided with driving gear, and described developer roll one end is provided with the follower gear with this driving gear engagement.
7. according to each described a kind of spacing control gear of claim 1 to 6, it is characterized in that: described spacing H is 0.12, and described difference in height D is 0.1mm.
8. according to each described a kind of spacing control gear of claim 1 to 6, it is characterized in that: be provided with at least one permanent magnet in the described photosensitive drums, the magnetic carbon dust of described developer roll surface attachment can be attached to photosensitive drum surface by the permanent magnet effect.
9. a kind of spacing control gear according to claim 8 is characterized in that: it is characterized in that: described developer roll is aluminium roller or rubber rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320010121 CN203101820U (en) | 2013-01-09 | 2013-01-09 | Spacing control mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320010121 CN203101820U (en) | 2013-01-09 | 2013-01-09 | Spacing control mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101820U true CN203101820U (en) | 2013-07-31 |
Family
ID=48853205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320010121 Expired - Fee Related CN203101820U (en) | 2013-01-09 | 2013-01-09 | Spacing control mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101820U (en) |
-
2013
- 2013-01-09 CN CN 201320010121 patent/CN203101820U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20140109 |