WO2014005403A1 - Photosensitive drum driving head and image forming device driving mechanism - Google Patents
Photosensitive drum driving head and image forming device driving mechanism Download PDFInfo
- Publication number
- WO2014005403A1 WO2014005403A1 PCT/CN2012/086505 CN2012086505W WO2014005403A1 WO 2014005403 A1 WO2014005403 A1 WO 2014005403A1 CN 2012086505 W CN2012086505 W CN 2012086505W WO 2014005403 A1 WO2014005403 A1 WO 2014005403A1
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- WO
- WIPO (PCT)
- Prior art keywords
- photosensitive drum
- driving head
- image forming
- straight
- boss
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
- G03G15/757—Drive mechanisms for photosensitive medium, e.g. gears
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
Definitions
- the present invention relates to a photosensitive drum driving head and an image forming apparatus driving mechanism. Background technique
- a conventional image forming apparatus is provided with a motor, an image forming apparatus driving head, and a process cartridge, and the process cartridge is detachably mounted in the image forming apparatus, and the process cartridge is provided with a photosensitive drum and a photosensitive drum drive fixedly coupled to the end of the photosensitive drum
- the head generates a power during the operation of the image forming apparatus, and transmits power to the process cartridge through the image forming apparatus driving head and the photosensitive drum driving head to rotate the photosensitive drum on the process cartridge.
- one end of the photosensitive drum 7 is fixedly provided with a photosensitive drum driving head, and the photosensitive drum driving head includes a convex connecting shaft 17, and the convex connecting shaft 17 is provided with a twist-shaped boss 17a, which is convex.
- the stage 17a includes a tip end portion 17a1; the center of rotation of the male coupling shaft 17 coincides with the center of rotation of the photosensitive drum 7; the concave connecting shaft 18 includes a twisted groove 18a on which the bottom surface 18a1 is provided.
- the image forming apparatus drive head 18 receives power rotation from the motor, the male coupling shaft 17 is engaged with the image forming apparatus drive head 18, and the rotational power is transmitted to the male coupling shaft through the image forming apparatus drive head 18. 17, and finally the photosensitive drum 7 is rotated.
- the male coupling shaft 17 is engaged with the image forming apparatus driving head 18, the twisted projection 17a on the male coupling shaft 17 is inserted into the twisted groove on the image forming apparatus driving head 18.
- the end surface 17a1 is opposed to the bottom surface 18a2, and the rotational power on the image forming apparatus drive head 18 is transmitted to the male coupling shaft 17 by the engagement of the twist boss 17a with the recess 18a.
- FIG. 3 and 4 are schematic cross-sectional views showing the state in which the twisted projection 17a and the twisted recess 18a are not rotated and rotated, respectively.
- the cross section of the twisted projection 17a and the twisted recess 18a are both triangular. (e.g., an equilateral triangle), and the size of the triangular boss 17a is smaller than the size of the triangular groove 18a.
- the convex connecting shaft rotating shaft XI on the photosensitive drum does not coincide with the rotating shaft X2 of the image forming apparatus driving head.
- Fig. 3 when the boss 17a is inserted into the recess 18a but does not rotate with the recess 18a, the convex connecting shaft rotating shaft XI on the photosensitive drum does not coincide with the rotating shaft X2 of the image forming apparatus driving head.
- Fig. 3 when the boss 17a is inserted into the recess 18a but does not rotate with the recess 18a, the convex connecting shaft rotating shaft
- R0 is the diameter of the rotating circle of the three apex angles 17a2 of the boss 17a
- R1 is the diameter of the inscribed circle of the triangular groove 18a
- R2 is the diameter of the three apex angles of the groove 18a
- FIG. 5 Another embodiment of the prior art is shown in FIG. 5.
- the twisted projection 17a and the twisted recess 18a are both quadrangular (such as a regular quadrilateral), and the quadrilateral projection 17a is engaged with the quadrangular recess 18a. And pass the power.
- the image forming apparatus driving head can also adopt the manner shown in FIG. 6.
- one end of the image forming apparatus driving head 28 is provided with a twisted groove 28a, and the groove 28a is provided with a bottom surface 28al and
- the boss 28a2 is located at the center of the twisted triangular groove 28a (the center of rotation of the boss coincides with the rotation axis X2 of the image forming apparatus driving head), Its height is substantially the same as the depth of the groove 28a, which may be tapered.
- a photosensitive drum with a photosensitive drum driving head is generally used on a processing cartridge used in a conventional image forming apparatus, and the processing cartridge includes at least: a photosensitive drum driving head for forming an electrostatic latent image a photosensitive drum, a developer that develops the electrostatic latent image, and a developing roller that conveys the developer to the photosensitive drum.
- the image forming apparatus drive head receives rotational power from the motor from the image forming apparatus to rotate the photosensitive drum and the developing roller.
- the distortion angle of the twisted surface on the boss and the groove is required to be high.
- the twisted surface on the boss and the twisted surface on the groove are inconsistent due to manufacturing precision problems, the twisted surface on the boss and the twisted surface on the groove are in point-to-surface contact, one of which is twisted Deformation occurs during the engagement of the boss and the groove, so that the convex connecting shaft rotation axis XI on the photosensitive drum does not coincide with the rotation axis X2 of the image forming apparatus driving head, which affects the smoothness of power transmission;
- the above problem requires that the twisted surface of the boss and the groove is highly manufactured, which increases the manufacturing cost and causes problems in manufacturing and the like.
- the polygonal shape of the boss and the groove is difficult to process, and the manufacturing precision of the boss and the groove is required to be high. Taking an equilateral triangle as an example, the accuracy of the equilateral triangular boss and the groove is high, so as to ensure the accuracy of the center position of the triangle. Otherwise, the convex connecting shaft rotation axis XI on the photosensitive drum when the boss and the groove are engaged The rotation axis X2 of the driving head of the image forming apparatus may not overlap, thereby causing the transmission to be unstable. In addition, during the engagement of the boss and the groove, the apex angle of the triangle on the boss is easy to transmit due to the apex angle of the triangle.
- the present invention provides a photosensitive drum driving head and an image forming apparatus driving mechanism for solving the technical problem that the conventional photosensitive drum driving head has high requirements for the distortion angle accuracy of the twisted projection and the twisted concave engagement.
- the technical solution adopted by the present invention is:
- a photosensitive drum driving head that transmits a driving force in cooperation with an image forming apparatus driving head, the image forming apparatus driving head comprising: a twisted groove having a triangular cross section, and three apex angles disposed at the twisted groove
- the power transmission portion, the power transmission portion includes a twisted slope, and the top of the twisted slope includes an edge that engages with the photosensitive drum drive head
- the photosensitive drum drive head includes: disposed at the end of the photosensitive drum a drum flange connected to the photosensitive drum, a drum shaft extending axially from the end of the drum flange, a boss projecting axially from the end surface of the drum shaft and engaging with a groove on the driving head of the image forming apparatus
- the side wall of the boss is provided with three straight convex teeth extending in the radial direction of the boss and matching the power transmission portion, the straight convex teeth being perpendicular to the drum shaft and extending in the direction of the drum axis Extendingly, the straight
- the straight protruding tooth further includes: a first side surface and a second side surface; the first side surface of the drum shaft is perpendicular, the second side surface is inclined, and the width of the straight convex teeth is along the straight convex The ends of the teeth gradually increase toward the root of the straight teeth.
- the photosensitive drum driving head is arranged as a straight tooth of the power transmission portion, which solves the requirement that the existing photosensitive drum driving head has high distortion angle precision due to the twisted convex bracket and the twisted concave concave fit. technical problem.
- FIG. 1 is a perspective view of a photosensitive drum with a photosensitive drum driving head in the prior art.
- FIG. 2 is a perspective view of a prior art male coupling shaft and a female coupling shaft.
- Fig. 3 is a schematic view showing a state of a cross section when the prior art twisted projection and the twisted recess are not rotated.
- FIG. 4 is a schematic view showing a state of a cross section of a prior art twisted protrusion and a twisted groove.
- Fig. 5 shows another shape of the protrusion and the groove of the prior art in the shape of a quadrangle.
- Fig. 6 is a schematic view showing a center of a groove in the prior art in which a boss is provided.
- Fig. 7 is a perspective view showing the driving head of the image forming apparatus.
- Figure 8 is a plan view of the image forming apparatus drive head.
- Fig. 9 is a perspective view showing the photosensitive drum driving head used in the first embodiment.
- Fig. 10 is a view showing the force analysis of the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the first embodiment.
- Figure 11 is a perspective view of the photosensitive drum driving head used in the second embodiment.
- Figure 12 is a front elevational view of the photosensitive drum driving head used in the second embodiment.
- Fig. 13 is a plan view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the second embodiment.
- Fig. 14 is a view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the second embodiment.
- Fig. 15 is a cross-sectional view showing the force analysis of the driving head of the image forming apparatus used in the second embodiment after being engaged with the photosensitive drum driving head.
- Figure 16 is a perspective view showing the photosensitive drum driving head used in the third embodiment.
- Figure 17 is a perspective view showing the photosensitive drum driving head used in the fourth embodiment.
- Figure 18 is a partial enlarged view of the boss used in the present invention.
- Figure 19 is a front elevational view of Figure 18 taken along line B.
- Figure 20 is a plan view of the boss used in the present invention.
- Figure 21 is a perspective view showing the photosensitive drum driving head used in the fifth embodiment.
- Figure 22 is a plan view showing the photosensitive drum driving head used in the fifth embodiment.
- Fig. 23 is a plan view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the fifth embodiment.
- Fig. 24 (a) is a right side view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head employed in the fifth embodiment.
- Figure 24 (b) is a cross-sectional view along line C in Figure 24 (a).
- Figure 25 is a cross-sectional view taken along line A of Figure 23;
- Figure 26 is a cross-sectional view taken along line B of Figure 23;
- Fig. 27 is a perspective view showing the structure of a portion of the photosensitive drum driving head in which the convex tooth end face is positioned in the fifth embodiment.
- Figure 28 is a perspective view showing the photosensitive drum driving head used in the sixth embodiment.
- Figure 29 is a right side view of Figure 28.
- Fig. 30 is a perspective view showing the structure of a portion of the photosensitive drum driving head in which the convex tooth end face is positioned in the sixth embodiment.
- Figure 31 is a schematic view showing the arcuate connection between the straight and convex teeth in the sixth embodiment.
- Figure 32 is a perspective view showing the structure of a portion of a photosensitive drum driving head provided with a retaining portion in the sixth embodiment.
- Fig. 33 is a view showing the internal structure of the photosensitive drum driving head provided with the retaining portion in the sixth embodiment after being engaged with the image forming apparatus driving head. detailed description
- FIG. 7 and FIG. 8 are respectively a perspective view and a top view of a driving head of an image forming apparatus.
- the image forming apparatus driving head 20 includes: a groove 11 having an equilateral triangle cross section, which is disposed at three apex angles of a triangle and The power transmission portion 11a having a twisted structure and the stopper portion lib located at three sides of the triangle; the power transmission portion 11a includes a twisted slope 11la and a lead slope 11a2. It can be seen from the top view shown in FIG.
- the image forming apparatus drive head is coupled to a motor in the image forming apparatus to transmit power.
- the image forming apparatus drive head 20 is identical to the prior art image forming apparatus drive head.
- Figure 9 is a perspective view of the photosensitive drum driving head used in the first embodiment. As shown, the photosensitive drum driving head comprises: a drum flange 2 disposed at the end of the photosensitive drum 1 and connected to the photosensitive drum 1, and the drum flange 2 is used.
- a drum shaft 3 extending axially from the end of the drum flange 2, the drum shaft 3 is for rotatably supporting the photosensitive drum 1 during operation of the process cartridge, from the drum shaft 3 axially extending, a boss 4 for receiving a driving force from the image forming apparatus driving head 20, the side wall 4b of the boss 4 is provided with a first protruding tooth 5a extending radially along the boss 4, wherein The first convex teeth 5a are obliquely disposed on the boss side wall 4b.
- the first protruding teeth 5a located on the drum driving head boss 4 mesh with any power transmitting portion 11a to transmit power, and the boss side wall 4b of the photosensitive drum driving head and the image forming device drive the head concave
- the stopper portion l ib of the groove is tangentially engaged at the three tangent points P1, P2 and P3, thereby achieving center-alignment centering between the photosensitive drum driving head and the image forming apparatus driving head 20 during the driving force transmission.
- Figure 10 is a schematic view showing the force analysis of the driving of the photosensitive drum driving head and the image forming apparatus driving head, "A" is the rotation direction of the driving head of the image forming apparatus, and the force generated by the driving head of the image forming apparatus on the first convex teeth 5a is Fl l F11 is decomposed into normal force F12 and radial force F14, F15 is the force generated by the image forming device driving head at the cutting point P1, and F13 is the force generated by the image forming device driving head at the cutting point P2, and P3 is not Force, in summary, can be obtained as follows:
- the 3 heads are subjected to a force of F12 at P1 and a force of 2 ⁇ F14 at P2.
- FIG. 11 and FIG. 12 are respectively a perspective view and a front view of the photosensitive drum driving head used in the embodiment, and FIG. 13 is a top view of the driving drum driving head and the image forming apparatus driving head used in the embodiment.
- the image forming apparatus driving head described in the embodiment employs the image forming apparatus driving head mentioned in the first embodiment, and the description thereof will not be repeated.
- the photosensitive drum driving head comprises: a drum flange 2 fixedly connected to the end of the photosensitive drum 1, extending axially from the end of the drum flange 2, for rotatably supporting the photosensitive drum during the operation of the process cartridge a drum shaft 3 extending axially from the end surface of the drum shaft 3 for receiving a driving force from the image forming apparatus driving head 20, and a side wall 4b of the cylindrical boss 4 is provided along the cylinder a pair of convex teeth 4a extending radially and engaging with any two power transmission portions of the image forming apparatus driving head; the convex teeth 4a are obliquely disposed on the side wall 4b of the cylindrical boss 4, the convex teeth 4a
- the engaging surface 4al is disposed on the surface of the engaging surface 4al, and the area of the engaging surface 4al is between 5 and 20 mm 2 , preferably 7 to 16 mm 2 .
- the engaging surface 4 a1 When the force is transmitted, the engaging surface 4 a1 is engaged with the inner wall of the power transmitting portion in the driving head of the image forming apparatus to transmit power.
- the wear between the photosensitive drum driving head and the driving head of the image forming apparatus can be reduced by providing the engaging surface 4al on the convex tooth 4a; the angle ⁇ between the convex tooth 4a and the rotational axis of the photosensitive drum driving head is selected as 3- Between 40°, 25-30° is the best to ensure the drum drive head and image shape
- the device driving head can be smoothly engaged while preventing the photosensitive drum driving head from coming out of the image forming apparatus driving head during power transmission, so that the image forming apparatus driving head and the photosensitive drum driving head stably transmit power; the convex teeth 4a
- the length from the side wall 4b in the radial direction is L1, and the range of L1 is 2-5 mm.
- the minimum angle ⁇ between the two convex teeth 4a is 120 °, the upper limit of the angle is generally 2 °
- the convex tooth 4a can allow the manufacturing precision error of the ⁇ size, the range of ⁇ is between 2 ° -10 °, and the optimum is 2-4 °. If the ⁇ is the angular error, the two convex teeth 4a The minimum angle ⁇ between the two becomes ⁇ + ⁇ , at which time the two convex teeth 4a do not simultaneously mesh with the power transmission portion Ha of the groove 11, and the convex teeth located most upstream in the rotational direction are first driven on the image forming apparatus.
- the power transmission portion is engaged to serve as a buffering function. If the convex tooth 4a has a manufacturing error dimension of a corner size downstream of the rotation direction, the ⁇ will cause the convex tooth to produce a gradual meshing surface, and the power transmission in the convex tooth 4a and the groove
- the portion 11a serves as a buffer for the convex teeth 4a during the meshing process, and can reduce damage between the driving head of the image forming apparatus and the driving head of the photosensitive drum; the cylindrical surface of the boss between the two protruding teeth 4a and the driving head of the image forming apparatus
- the limiting portion l ib contacts the photosensitive drum driving head .
- a rounded corner is also provided at the junction of the convex tooth 4a and the boss cylindrical surface to reduce stress concentration.
- the drum flange 3, the drum shaft 3, the cylindrical boss 4 and the protruding teeth 4a in the above-mentioned photosensitive drum driving head may be integrally formed of the same material, or may have a buffer structure, and the drum flange 2 may be further provided with The drum gear 2a that transmits the driving force to other components such as the developing member or the like.
- FIG. 14 is a schematic view showing the assembly of the driving head of the photosensitive drum and the driving head of the image forming apparatus
- FIG. 15 is a schematic view showing the force analysis of the driving force of the driving head of the image forming apparatus after being engaged with the driving head of the photosensitive drum, and the photosensitive drum driving head and the image forming apparatus are known from the drawings.
- the limiting portion l ib of the driving head groove is tangentially meshed at three cutting points P4, P5 and P6, "A" is the rotation direction of the driving head of the image forming apparatus, and the image forming device driving head generates a size for the photosensitive drum driving head
- F24 and F56 are the same magnitude as the F11 in the first embodiment
- F24 is decomposed into the normal force F2
- the radial forces F4, F56 are decomposed into normal force F5 and radial force F6, F2 and F5 are the same size as F12 in the first embodiment, F4 and F6 is the same size as F14 in the prior art, assuming that F1 is the force generated by the image forming apparatus driving head at the point of cut P5, and F3 is the force generated by the image forming apparatus driving head at the point of cut P6, P4 is not subjected to force,
- the driving head of the device and the driving head of the photosensitive drum are subjected to a force of 2 - F4 at P5, and the force at 0 is 0.
- the force point is reduced, and the driving head and the photosensitive drum of the image forming apparatus are lowered.
- the wear of the driving head at the cutting points P5 and P6 improves the positioning stability of the photosensitive drum driving head, thereby making the transmission of the driving force smoother.
- An image forming apparatus driving mechanism comprising the photosensitive drum driving head described in the above embodiment and the image forming apparatus driving head 20 described in the background art, that is, the image forming apparatus driving head 20 includes: a concave having an equilateral triangle cross section The groove 11, the power transmission portion 11a which is disposed at three apex angles of the triangle and has a twisted structure, and the stopper portion 11b located at the three sides of the triangle.
- the image forming device drive head is coupled to a motor in the image forming device to transmit power.
- FIG. 16 is a photosensitive drum drive used in the embodiment.
- a perspective view of the head is shown in the figure, the helical teeth 4a are obliquely disposed on the side wall 4b of the boss, and the straight teeth 4c are vertically disposed on the side wall 4b.
- FIG. 17 is a perspective view of the photosensitive drum driving head used in the embodiment, 4c is a convex tooth of the photosensitive drum driving head, and the photosensitive drum driving head The manufacturing precision is further reduced.
- the above-described embodiment is provided on the teeth 4a of the engagement surface there 4Al, 4Al engaging surface area is between 5-20mm 2, to the best 7-16mm 2, with the engagement surface 4Al force transmitting images
- the inner wall of the power transmission portion of the device driving head is engaged to transmit power, and the wear between the photosensitive drum driving head and the driving head of the image forming apparatus can be reduced by providing the engaging surface 4a1 on the convex tooth 4a;
- the protruding tooth further includes: a top corner 4a4, two mutually parallel planes 4a2 and 4a3 connected to the side wall of the convex tooth, and an angle between the planes 4a2 and 4a3 and the axis of the photosensitive drum is ⁇ ;
- the mating surface further comprises: a straight edge sl, S2 and oblique side s3; the straight side si and the straight side s2 are parallel, and the angle ⁇ between the oblique side s3 and the axis of the photosensitive drum is between
- the convex teeth can also be arranged in three symmetrical shapes, either of which are provided as inclined convex teeth or as convex teeth each being arranged vertically. , or one of them is set as a slanted convex tooth, the other two are set as vertical convex teeth, or one of them is set as a vertical convex tooth, and the other two are arranged as inclined convex teeth; the same technical effect can also be achieved.
- the inclined convex teeth mean that the convex teeth are obliquely disposed on the side wall of the boss, and the vertical convex teeth mean that the protruding teeth are vertically disposed on the side wall of the boss.
- the image forming apparatus driving head employed in this embodiment is the same as that in the above embodiment.
- the photosensitive drum driving head includes: a drum flange 200 fixedly coupled to an end portion of the photosensitive drum 1, from the end of the drum flange 200
- a drum shaft 300 extending axially for rotatably supporting the photosensitive drum 1 during operation of the process cartridge, a cylinder extending axially from the end surface of the drum shaft 300 for receiving a driving force from the image forming apparatus driving head 20 a convex boss 400, the side wall 400a of the cylindrical boss 400 is provided with three straight convex teeth 500 extending radially along the cylindrical boss 400 and cooperating with the power transmission portion 1 la of the image forming apparatus driving head.
- the angle between the straight teeth 500 and the axis of the photosensitive drum is 0 degree, and the length of the cylindrical boss 400 extending in the axial direction of the photosensitive drum is greater than the length of the straight protruding teeth 500 extending in the axial direction of the photosensitive drum.
- Figure 23 is a plan view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head
- Figure 24 (a) is a right side view of the photosensitive drum driving head and the image forming apparatus driving head assembly
- Figure 24 (b) is Figure 24
- the straight protruding tooth 500 includes: an engaging surface 500a, a first side surface 500b1 and a second side surface 500b2; the first side surface 500b1 and the second side surface 500b2 are parallel to each other and perpendicular to the end surface of the drum shaft 300, and the photosensitive drum
- the axes are parallel; the mating surface 500a is perpendicular to the end surface of the drum shaft 300 and parallel to the drum axis, the chamfer angle ⁇ between the mating surface 500a and the first side 500bl and the twisted slope l lal in the recess 11
- Fig. 7-8 The inclination is matched to increase the contact area when the meshing surface 500a and the twisted bevel l lal mesh with each other to transmit power.
- the bevel angle Y is between 0 and 90°, and the optimum is 20-45 °.
- Figure 21-22 When the straight convex tooth 500 meshes with the image forming apparatus driving head 20 to transmit power, the root of the straight convex tooth 500 meshes with the edge l la3 (Fig. 7_8) of the twisted inclined surface l lal, that is, a line and an edge on the engaging surface 500a La3 (Fig.
- the boss 400 is tapered, that is, the outer diameter dl of the cross-section of the end of the boss is smaller than the outer diameter d2 of the cross-section of the root of the boss, as shown in FIG.
- the twisted slope l lal and the lead inclined surface l la2 (Fig. 7_8) in the groove 11 are inclined, so the convex tooth 500 is inserted into the concave shape.
- the width W in the groove is inversely proportional to the height L, that is, the larger the width, the smaller the height;
- the width W of the convex tooth 500 is proportional to its strength, that is, the larger the width, the stronger the strength, the smaller the height, the convex tooth The easier it is to escape from the groove;
- the range of height L is
- the range of width W is 1. 0-5. 0mm, with 1. 5-4. 0mm is the best, to achieve both delivery
- the strength requirement during powering ensures that the protruding teeth 500 are not easily removed from the groove.
- the axial positioning of the photosensitive drum driving head and the image forming apparatus driving head may be such that the end surface of the boss 400 contacts the bottom surface of the groove 11 for axial positioning, or may be the convex tooth 500.
- the end surface is in axial contact with the lead-in inclined surface l la2 (Fig. 7-8) in the groove 11, and
- Fig. 27 is a perspective view showing the structure of the photosensitive drum driving head portion which is positioned by the convex tooth end surface, as shown in the figure, the cylindrical boss
- the length of the 400 extending in the axial direction of the photosensitive drum is smaller than the length of the straight protruding teeth 500 extending in the axial direction of the photosensitive drum.
- the engaging surface is formed by a longitudinal chamfering of the end faces of the straight teeth, and the longitudinal direction of the straight teeth is parallel to the axial direction of the photosensitive drum.
- the root of the straight tooth is a portion where the straight tooth is connected to the end of the drum shaft.
- Figure 28 is a perspective view of the photosensitive drum driving head used in the embodiment
- Figure 29 is a right side view of Figure 28, showing the photosensitive drum driving head used in the embodiment and the photosensitive drum driving head in the fifth embodiment
- the second side 500b2 of the straight convex tooth is disposed along the end of the straight convex tooth a progressive slope of 500b3 toward the root of the straight tooth, the other structures are the same;
- the angle between the second side 500b2 and the first side 500bl is ⁇ , and the range of ⁇ is between 3_45 °, 20-30° For the best.
- the width W of the convex tooth 500 inserted into the groove 11 is inversely proportional to the height L, there is the following technical problem: the larger the width W, the stronger the convex tooth strength, and the smaller the height L, the easier the convex tooth is. Conversely, the smaller the width W, the smaller the strength of the convex teeth, the larger the height L, the less likely the convex teeth to escape from the grooves; and the distortion of the roots of the straight teeth 500 and the grooves 11
- the edge l la3 of the inclined surface l lal meshes to transmit power (shown in FIG. 26 ), which requires high strength of the root position of the straight protruding tooth 500.
- the structure of the second side 500b2 in this embodiment can solve the above problem.
- the reason is as follows: Since the second side 500b2 is a progressive slope along the end of the straight tooth toward the root of the straight tooth, that is, the end width of the straight tooth 500 is smaller than the root width, and the straight convex is reduced.
- the width of the end of the tooth 500 can increase the height of the straight tooth insertion groove 11, and the convex tooth does not easily escape from the groove; increasing the width of the root can increase the strength of the root, so that the straight tooth insertion is satisfied. Under the condition of the height of the groove And increasing the strength of the straight teeth roots.
- the axial positioning of the photosensitive drum driving head and the image forming apparatus driving head may be such that the end surface of the boss 400 contacts the bottom surface of the groove 11 for axial positioning, or may be the end surface 500b3 and the groove of the convex tooth 500.
- the bottom surface of Fig. 11 (Fig. 7-8) is axially positioned for contact, as shown in Fig. 30, Fig. 30 is a perspective view showing the structure of the photosensitive drum driving head portion which is positioned by the convex tooth end surface, and it is known that the cylindrical boss 400 is photosensitive.
- the length extending in the axial direction of the drum is smaller than the length of the straight protruding teeth 500 extending in the axial direction of the photosensitive drum.
- Figure 31 is a schematic view showing a curved surface connection between the straight and convex teeth. It is understood that the end surface of the boss 400 between the straight convex teeth 500 has a curved surface which is recessed toward the drum axis direction, and ⁇ ⁇ 3 straight convex teeth 500 are used between
- the arcuate connection can reduce stress concentration at the junction of the boss and the straight convex tooth, so as to prevent breakage of the joint between the boss and the straight tooth when the straight tooth is stressed Phenomenon.
- FIG. 32 and FIG. 33 are respectively a perspective view showing a structure of a portion of a photosensitive drum driving head provided with a retaining portion, and an internal structural view of the photosensitive drum driving head provided with the retaining portion engaged with the driving head of the image forming apparatus, respectively, for further solving
- the problem that the straight protruding teeth are easily released from the groove is provided with a retaining portion 500a2 at a position close to the end surface of the straight protruding tooth, and the retaining portion 500a2 extends outwardly perpendicular to the engaging surface 500a.
- the retaining portion 500a2 is an arcuate body or a hemispherical body extending outward from the distal end of the engaging surface 500a.
- the retaining portion 500a2 can be engaged with the twisted slope l lal in the groove 11, if the photosensitive drum driving head has a tendency to escape in the axial direction
- the detachment preventing portion 500a2 abuts against the twisted slope l lal in the recess 11 to cause the photosensitive drum driving head and the image forming apparatus driving head to generate an axial direction pulling force to prevent the photosensitive drum driving head from being driven from the image forming apparatus. Get out of the head.
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Abstract
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012382294A AU2012382294B2 (en) | 2012-07-05 | 2012-12-13 | Photosensitive drum driving head and driving mechanism of image forming apparatus |
RU2015103674A RU2599597C9 (en) | 2012-07-05 | 2012-12-13 | Driven head of photosensitive drum and drive of imaging device |
EP12868927.0A EP2703893B1 (en) | 2012-07-05 | 2012-12-13 | Photosensitive drum driving head and image forming device driving mechanism |
CA2839969A CA2839969C (en) | 2012-07-05 | 2012-12-13 | Photosensitive drum driving head and driving mechanism of image forming apparatus |
JP2015518787A JP5935023B2 (en) | 2012-07-05 | 2012-12-13 | Photosensitive drum drive head and drive mechanism of image forming apparatus |
US13/972,739 US8886087B2 (en) | 2012-07-05 | 2013-08-21 | Photosensitive drum driving head and driving mechanism of image forming apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201210232590.1A CN102866609B (en) | 2011-07-05 | 2012-07-05 | Photosensitive drum driving head and image forming device driving mechanism |
CN201210232590.1 | 2012-07-05 |
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US13/972,739 Continuation US8886087B2 (en) | 2012-07-05 | 2013-08-21 | Photosensitive drum driving head and driving mechanism of image forming apparatus |
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PCT/CN2012/086505 WO2014005403A1 (en) | 2012-07-05 | 2012-12-13 | Photosensitive drum driving head and image forming device driving mechanism |
Country Status (6)
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EP (1) | EP2703893B1 (en) |
JP (1) | JP5935023B2 (en) |
AU (1) | AU2012382294B2 (en) |
CA (1) | CA2839969C (en) |
RU (1) | RU2599597C9 (en) |
WO (1) | WO2014005403A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6504449B2 (en) * | 2014-08-27 | 2019-04-24 | 株式会社リコー | Drive transmission device and image forming apparatus |
JP2019211076A (en) * | 2018-05-30 | 2019-12-12 | キヤノン株式会社 | Drive transmission device and image formation device |
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CN202067077U (en) * | 2011-04-08 | 2011-12-07 | 江西亿铂电子科技有限公司 | Processing box |
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2012
- 2012-12-13 JP JP2015518787A patent/JP5935023B2/en not_active Expired - Fee Related
- 2012-12-13 EP EP12868927.0A patent/EP2703893B1/en not_active Not-in-force
- 2012-12-13 CA CA2839969A patent/CA2839969C/en not_active Expired - Fee Related
- 2012-12-13 AU AU2012382294A patent/AU2012382294B2/en active Active
- 2012-12-13 WO PCT/CN2012/086505 patent/WO2014005403A1/en active Application Filing
- 2012-12-13 RU RU2015103674A patent/RU2599597C9/en active
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US20090074453A1 (en) * | 1995-03-27 | 2009-03-19 | Canon Kabushiki Kaisha | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus |
JP2003186348A (en) * | 2001-12-21 | 2003-07-04 | Canon Inc | Image forming apparatus and process cartridge |
CN201110946Y (en) * | 2007-08-23 | 2008-09-03 | 珠海天威技术开发有限公司 | Imaging processing box for laser printer |
CN102866609A (en) * | 2011-07-05 | 2013-01-09 | 珠海赛纳打印科技股份有限公司 | Photosensitive drum driving head and image forming device driving mechanism |
CN102866608A (en) * | 2011-07-05 | 2013-01-09 | 珠海赛纳打印科技股份有限公司 | Photosensitive drum driving head and image forming device driving mechanism |
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Also Published As
Publication number | Publication date |
---|---|
EP2703893A1 (en) | 2014-03-05 |
AU2012382294B2 (en) | 2015-05-07 |
CA2839969C (en) | 2017-11-07 |
JP5935023B2 (en) | 2016-06-15 |
EP2703893B1 (en) | 2016-09-14 |
EP2703893A4 (en) | 2014-12-03 |
CA2839969A1 (en) | 2014-01-09 |
RU2015103674A (en) | 2016-08-27 |
RU2599597C2 (en) | 2016-10-10 |
RU2599597C9 (en) | 2017-02-20 |
AU2012382294A1 (en) | 2014-01-23 |
JP2015525892A (en) | 2015-09-07 |
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