CN216387748U - Developing box - Google Patents

Abstract

The utility model discloses a developing box, which is detachably arranged on an electronic imaging device, wherein the electronic imaging device comprises a photosensitive drum and a separation push rod; the developing box comprises a box body, a developing roller and a separating mechanism, wherein the box body is provided with the developing roller; the extending member moves under the action of the separation push rod, and the separating member obtains the action force and rises towards the direction far away from the box body so as to separate the photosensitive drum from the developing roller. The utility model provides a separating mechanism for realizing switching between a contact state and a separation state between a developing roller and a photosensitive drum.

Description

Developing box

Technical Field

The utility model relates to the field of laser printing, in particular to a developing box.

Background

The developing cartridge is a detachable portion widely used in an electronic image forming apparatus. The developing cartridge has a developing roller, and the electrophotographic apparatus is switchable between a state in which the developing roller and the photosensitive drum are in contact with each other and a state in which the developing roller and the photosensitive drum are separated from each other. In the related art, a member for moving the developing cartridge to separate the developing roller from the photosensitive drum is provided at both ends of the drawer unit or the drum cartridge, and two members for moving the developing cartridge need to receive a driving force from a main body of the image forming apparatus. However, this structure easily causes damage to the separation member on the developing cartridge, affecting the contact and separation between the photosensitive drum and the developing roller.

SUMMERY OF THE UTILITY MODEL

According to an aspect of the present invention, there is provided a developing cartridge detachably mountable to an electrophotographic apparatus including a photosensitive drum and a separation push rod; the developing box comprises a box body, a developing roller and a separating mechanism, wherein the box body is provided with the developing roller, and the separating mechanism comprises an extending piece arranged on the box body and a separating piece movably connected with the extending piece; the extension member moves under the action of the separation push rod, and the separation member obtains the action force and rises towards the direction far away from the box body so as to separate the photosensitive drum from the developing roller.

In some embodiments, the separating member has a movable member and a support member, the movable member has one end movably connected to the support member and the other end movably connected to the extending member;

when the extension piece is in when the effect of separation push rod moves down, the moving part for the extension piece motion, and drive support piece linkage makes its orientation keep away from the direction of box body risees gradually to when support piece with the fixed push rod that is equipped with in the electronic imaging device sends the butt, the sensitization drum with the separation is realized to the developer roll.

In some embodiments, the two movable members are provided, and the two movable members are respectively movably connected to two ends of the supporting member.

In some embodiments, the separating member includes a movable member movably connected to the extending member, the movable member has a first movable member and a second movable member, one end of the first movable member is movably connected to the box body, the other end of the first movable member is movably connected to one end of the second movable member, and the other end of the second movable member is movably connected to the extending member;

when the extension piece moves under the action of the force of the separation push rod and drives the first moving piece and the second moving piece to be linked, the coupling end of the first moving piece and the second moving piece gradually rises towards the direction far away from the box body until the coupling end is abutted with a fixed push rod arranged in the electronic imaging device, and the photosensitive drum is separated from the developing roller.

In some embodiments, the separating member comprises a movable member, one end of the movable member is movably connected with the box body, and the other end of the movable member is movably connected with the extending member;

when the extension piece is in when the effect of separation push rod moves down, and drive the moving part linkage, the order the moving part with the one end orientation that the extension piece is coupled is kept away from the direction of box body risees gradually to with when the fixed push rod that is equipped with takes place the butt in the electronic imaging device, the separation is realized with the developer roll to the sensitization drum.

In some embodiments, the box body is provided with at least one limiting plate, and the limiting plate is provided with a first connecting through hole for movably connecting with the first movable member.

In some embodiments, the box body is provided with at least one limiting plate, and the limiting plate is provided with a limiting through hole for mounting the extending piece.

In some embodiments, the separating mechanism further comprises an elastic member, one end of the elastic member abuts against or is connected with the extending member, the other end of the elastic member abuts against or is connected with the box body, and the extending member can be reset under the action of the elastic member.

In some embodiments, the number of the separating members is at least two and is arranged at intervals along the axial direction of the extending member.

In some embodiments, the case body includes a case cover, the case cover is provided with a groove, and the extension member is disposed in the groove.

The utility model has the beneficial effects that: the utility model provides a separating mechanism for realizing switching between a contact state and a separation state between a developing roller and a photosensitive drum.

Drawings

FIG. 1 is a perspective view of a developing cartridge according to a first embodiment;

FIG. 2 is an exploded perspective view of a separation mechanism of the developing cartridge according to the first embodiment;

FIG. 3 is an assembled perspective view of a separation mechanism of the developing cartridge according to the first embodiment;

FIG. 4 is an exploded perspective view of a separator according to one embodiment;

FIG. 5 is a view showing an assembled structure of the separating member in the first embodiment;

FIG. 6 is a view showing an operating state of the separation mechanism when the developing roller and the photosensitive drum are separated according to the first embodiment;

FIG. 7 is a view showing an operating state of the separation mechanism when the developing roller and the photosensitive drum are in contact according to the first embodiment;

FIG. 8 is a perspective view of a developing cartridge according to a second embodiment;

FIG. 9 is an exploded perspective view of a separation mechanism of the developing cartridge according to the second embodiment;

FIG. 10 is an assembled perspective view of a separation mechanism of the developing cartridge according to the second embodiment;

FIG. 11 is an exploded perspective view of a separator according to the second embodiment;

FIG. 12 is a combined structural view of the separating member in the second embodiment;

FIG. 13 is a view showing an operating state of the separation mechanism when the developing roller and the photosensitive drum are separated according to the second embodiment;

FIG. 14 is a view showing an operating state of the separation mechanism in contact between the developing roller and the photosensitive drum according to the second embodiment;

fig. 15 is an assembled perspective view of a modification of the separation mechanism of the developing cartridge in the second embodiment;

fig. 16 is an assembled perspective view of another modification of the separation mechanism of the developing cartridge in the second embodiment;

FIG. 17 is a perspective view of a developing cartridge in the third embodiment;

FIG. 18 is an exploded perspective view of a separation mechanism of a developing cartridge in the third embodiment;

FIG. 19 is an assembled perspective view of a separation mechanism of a developing cartridge in the third embodiment;

FIG. 20 is a perspective view of a separating member in the third embodiment;

FIG. 21 is a view showing an operating state of the separation mechanism when the developing roller and the photosensitive drum are separated according to the third embodiment;

fig. 22 is a view showing an operation state of the separation mechanism when the developing roller and the photosensitive drum of the third embodiment are in contact.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 schematically shows a developing cartridge according to an embodiment of the present invention, which is detachably mounted in an electrophotographic apparatus including a photosensitive drum (not shown in the drawings), a fixing push lever 100, and a separation push lever 200.

The developing box comprises a box body 1, a developing roller 2, a separating mechanism 3 and an end cover 4. The box body 1 is internally provided with a powder bin (not shown in the figure) for accommodating developer, the box body 1 comprises a box cover 11, an end cover 4 is fixed on the side wall of the box body 1 through screws, and the end cover 4 can be matched and connected with the box cover 11. The developing roller 2 is rotatably supported on the cartridge body 1, and defines an extending direction of a rotation axis of the developing roller 2 as a left-right direction, an up-down direction is perpendicular to the left-right direction, and a front-back direction is perpendicular to the up-down direction and the left-right direction, respectively.

As shown in fig. 2 and 3, the separating mechanism 3 includes an extending member 31, an elastic member 32, and a separating member 33. The box cover 11 is provided with a groove 111 and a round hole 112, the groove 111 is arranged on the box cover 11 along the left and right direction, the round holes 112 are respectively arranged at the left and right ends of the box cover 11, and the groove 111 and the round holes 112 are positioned on the same axis.

The extension 31 is disposed in the groove 111, and two ends of the extension 31 penetrate out of the circular hole 112, the extension 31 is preferably a shaft, the extension 31 has a receiving portion 31a, an abutting portion 31b, a limiting portion 31c and at least one engaging portion 31d, the receiving portion 31a, the abutting portion 31b, the at least one engaging portion 31d and the limiting portion 31c are sequentially disposed along a direction from right to left, and the receiving portion 31a and the abutting portion 31b are both located outside (i.e., on the right side) the circular hole 112 at the right end of the box cover 11. The receiving part 31a is used for being in contact fit with the separation push rod 200, and the separation push rod 200 is used for applying acting force to the receiving part 31a and controlling the developing roller 2 to be in contact with and separated from a photosensitive drum of the electronic imaging device; the abutting portion 31b and the circular hole 112 are used for defining the position of the elastic element 32, specifically, the abutting portion 31b is an annular protrusion formed on the extending element 31, and the elastic element 32 is sleeved on the extending element 31 and located between the abutting portion 31b and the circular hole 112. The elastic member 31 is preferably a compression spring, and may be any material that can provide a desired elastic force, and the diameter of the elastic member 32 is larger than the diameter of the circular hole 112 of the cap 11 and smaller than the outer circumferential diameter of the annular protrusion on the abutting portion 31b, thereby defining the elastic member 32 therebetween. The restriction part 31c is an annular protrusion provided near the left end of the extension piece 31, and when the extension piece 31 is mounted in the groove 111, the restriction part 31c is located inside (i.e., on the right side) the circular hole 112 at the left end of the box cover 11, and the diameter of the restriction part 31c is larger than that of the circular hole 112, so that the extension piece 31 is prevented from sliding out of the groove 111 from the circular hole 112. An engaging portion 31d is provided between the restricting portion 31c and the abutting portion 31b, the engaging portion 31d is for connection with the separating piece 33, and the number of the engaging portions 31d matches the number of the separating pieces 33.

The extension 31 in this embodiment is preferably made of a rigid material as a movable shaft receiving the acting force, and may be made of a shaft receiving the acting force.

The separating member 33 is a movable link structure, and in this embodiment, two separating members 33 are provided, and two separating members 33 are spaced along the axial direction (i.e., left-right direction) of the extending member 31, and can cooperate with two fixed push rods 100 of the electrophotographic apparatus to control the developing roller 2 to contact with and separate from the photosensitive drum of the electrophotographic apparatus.

The separating member 33 has a movable member 331 and a support member 332, the movable member 331 is movably connected to the support member 332, that is, the movable member 331 and the support member 332 can rotate relatively, and specifically, the movable member 331 is hinged to the support member 332 through a connecting member 333.

The two movable members 331 are provided, the two movable members 331 are movably connected to two ends of the support member 332 through the support member 332, the movable member 331 has a first connection portion 331a and a second connection portion 331b, the support member 332 has a matching portion 332a and a contact portion 332b, the separating mechanism 3 is in a combined state, the engagement portion 31d of the extension member 31 is connected to the first connection portion 331a of the movable member 331 through the connection member 333, so that one end of the movable member 331 where the second connection portion 331b is provided can move around one end of the movable member 331 where the first connection portion 331a is provided, and a moving direction of one end of the movable member 331 where the second connection portion 331b is provided is in a front direction, that is, one end of the movable member 331 where the second connection portion 331b is provided gradually increases toward a direction away from the box body 1 or gradually decreases toward a direction approaching the box body. The engaging portion 332 is connected to the second connecting portion 331b of the connecting member 331 through a connecting member 333, so that the supporting portion 332 is pushed by the moving member 331 to move in the front-back direction, the movement of the supporting portion 332 and the end of the moving member 331 where the second connecting portion 331b is located is synchronous, when the end of the moving member 331 where the second connecting portion 331b is located moves forward (rises in a direction away from the cartridge body 1), the supporting portion 332 is also driven to move forward to enable the contact portion 332b of the supporting member 332 to collide with the fixed push rod 100 of the electronic imaging device, so as to force the cartridge body 1 to move in a direction away from the photosensitive drum, thereby separating the developing roller 2 from the photosensitive drum is realized, the contact portion 332b is arranged opposite to the fixed push rod 100, and in this embodiment, the contact portion 332b is arranged on the front end surface of the supporting member 332. The connecting member 333 may have various structures having a connecting function, and in the present embodiment, the connecting member 333 is a pin. Optionally, the movable connection between the movable element 331 and the supporting element 332 and the movable connection between the movable element 331 and the extending element 31 may also be implemented without using a connecting element, for example, the first connecting portion 331a of the movable element 331 is provided with a concave hole, and the matching portion 332a of the supporting element 332 is provided with a convex post, when assembling, the convex post is embedded into the concave hole, and the rotary connection between the two can also be implemented, of course, the convex post is provided at the first connecting portion 331a, and the concave hole is provided at the matching portion 332a, so that the same function can also be implemented.

Fig. 6 is a view showing an operation state of the separation mechanism when the developing roller and the photosensitive drum are separated according to the first embodiment. When the developing cartridge is mounted in the electrophotographic apparatus, the two stationary push rods 100 of the electrophotographic apparatus are in a non-contact state (or in a contact state, but no force is generated therebetween) with the contact portions 332b of the two separating members 33, respectively. When the electronic imaging device works, because the two fixed push rods 100 do not apply acting force to the separating mechanism 3, the separating mechanism 3 is at an initial position, and at the moment, the box body 1 does not have the action of external force, so the box body moves towards the direction close to the photosensitive drum under the action of self gravity, and the photosensitive drum is in close contact with the developing roller 2. When the electronic imaging device is finished working, the photosensitive drum needs to be separated from the developing roller 2, at this time, the separation push rod 200 of the electronic imaging device contacts with the receiving portion 31a of the extension piece 31, a force in the left direction is applied to the separation push rod, the extension piece 31 moves relative to the box body 1 in the left direction under the action of the force, the abutting portion 31b compresses the elastic piece 32 along with the movement of the extension piece 31, the limiting portion 31c of the extension piece 31 abuts against the side wall of the circular hole 112 of the box cover 11 (the box cover structure is not shown), the end of the movable piece 331 connected with the support piece 332 moves in the front direction relative to the box body, the support piece 332 is pushed to move in the front direction (the support piece 332 gradually rises in the direction far from the box body 1 relative to the support piece 332 of the box body 1), the contact portion 332b of the movable piece 332 contacts with the fixed push rod 100 and pushes the fixed push rod 100 to apply a pressure on the contact portion 332b of the movable piece 332, thereby form the thrust of separator 33 to the lid 11 of box body, and then form the power that the development box kept away from to the sensitization drum direction, force the development box towards the direction motion of keeping away from the sensitization drum for can pull open the distance between developer roll and the sensitization drum. The extension member 31 moves leftward in the left-right direction with respect to the case, and the elastic member 32 is compressed to store elastic potential energy, and the stabilized position is the separation position of the separation mechanism 3.

Fig. 7 is a view showing an operation state of the separation mechanism when the developing roller and the photosensitive drum are in contact according to the first embodiment. When the electronic imaging device needs to start working, the acting force of the separation push rod 200 on the receiving portion 31a of the extension member 31 needs to be cancelled, the elastic member 32 releases elastic potential energy, the extension member 31 moves rightwards relative to the cartridge body in the left-right direction, meanwhile, the support member 332 is driven to move along the front direction (the support member 332 gradually descends towards the direction close to the cartridge body 1 relative to the cartridge body 1), at this time, the contact portion 332b of the movable member 332 is separated from contact with the fixed push rod 100, so that the separation mechanism 3 is restored to the initial position, at this time, under the combined action of the gravity of the developing cartridge and the separation push rod 200 (cancelling acting force) of the electronic imaging device, the developing cartridge is forced to move towards the direction close to the photosensitive drum, and therefore, the developing roller 2 is tightly contacted with the photosensitive drum.

Example two

As an explanation of the second embodiment provided in the present invention, only the differences from the above-described first embodiment will be explained below. As shown in fig. 8 to 10, the lid 11 of the present embodiment is further provided with a limiting plate 113, the limiting plate 113 has a first limiting plate 1131, a second limiting plate 1132 and a third limiting plate 1133, in the left-right direction, first limiting plate 1131, second limiting plate 1132 and third limiting plate 1133 set gradually from right to left, first limiting plate 1131 and second limiting plate 1132 have seted up spacing through-hole 113a, spacing through-hole 113a is in same axis (along left-right direction) with recess 111 and round hole 112, first connection hole 113b has been seted up to first limiting plate 1131 and third limiting plate 1133, first connection hole 113b is used for cooperating swing joint with separating element 33 of separating mechanism 3, third limiting plate 1133 sets up in the left end of lid 11, omit the round hole of lid 11 left end in embodiment one, only set up round hole 112 at lid 11 right-hand member, first limiting plate 1131 and round hole 112 certain distance in interval, second limiting plate 1132 and third limiting plate 1133 certain distance in interval.

As shown in fig. 9 and 10, the separating mechanism 3 includes an extending member 31, an elastic member 32, and a separating member 33. The extension piece 31 has a receiving portion 311 and a limiting portion 313, the receiving portion 311 is provided at the right end of the extension piece 31, when the extension piece 31 is fitted into the groove 111 of the box cover 11, the extension piece 31 passes through the limiting through holes 113a of the first and second limiting plates 1131 and 1132, and the receiving portion 311 protrudes to the outside (i.e., the right side) of the circular hole 112 at the right end of the box cover 11, and the receiving portion 311 is used for contacting and cooperating with the separation push rod 200 to control the contacting and separating states of the separation mechanism 3. The limiting portions 313 are square bumps arranged on the extension piece 31, and may have other geometric shapes, a part of the limiting portions 313 may be embedded in the groove 111, two limiting portions 313 are arranged, one of the limiting portions 313 is located at the left end of the extension piece 31, the other limiting portion 313 is arranged at a certain distance from the receiving portion 311, the limiting portion 313 at the left end of the extension piece 31 is located between the second limiting portion 1132 and the third limiting plate 1133 and is arranged close to the second limiting plate 1132, and the other limiting portion 313 is located between the first limiting plate 1131 and the circular hole 112 and is arranged close to the circular hole 112. The limiting portion 313 is provided with a second connecting through hole 313a, the second connecting through hole 313a extends along the vertical direction, and the second connecting through hole 313a is used for being matched and movably connected with the separating piece 33.

As shown in fig. 9 and 10, the elastic element 32 is disposed between the first position-limiting plate 1131 and the circular hole 112 of the box cover 11, the elastic element 32 is sleeved on the extension element 31 and located between the first position-limiting plate 1131 and the limiting portion 313 near the right end, one end of the elastic element 32 abuts against the right end of the first position-limiting plate 1131, the other end abuts against the left end of the limiting portion 313, the elastic element 32 is made of any material capable of providing the required elastic force, and the diameter of the elastic element 32 is greater than that of the limiting through hole 113a on the first position-limiting plate 1131, so that the elastic element 32 is limited between the first position-limiting plate 1131 and the limiting portion 313.

The separating member 33 is a movable link structure, and in this embodiment, two separating members are provided, which can cooperate with two fixed push rods 100 of the electrophotographic apparatus to control the contact and separation of the developing roller 2 with and from the photosensitive drum of the electrophotographic apparatus. In the assembled state, the separate member 33 is movably connected to the restricting portion 313 of the extension member 31 and the stopper plate 113 of the box cover 11.

As shown in fig. 11 and 12, the separating member 33 has a movable member 331, and the movable member 331 is movably connected to the extending member 31 by a connecting member 332. The movable member 331 includes a first movable member 3311 and a second movable member 3312, two ends of the first movable member 3311 are respectively provided with a first connection portion 3311a and a second connection portion 3311b, two ends of the second movable member 3312 are respectively provided with a first connection portion 3311a and a third connection portion 3311c, the first connection portion 3311a of the first movable member 3311 is movably connected to the limiting portion 313 of the extension member 31 through a connection member 332, the connection member 332 penetrates through the first connection portion 3311a and the second connection through hole 313a to hinge one end of the first movable member 3311 to the limiting portion 313, the second connection portion 3311b of the first movable member 3311 is movably connected to the third connection portion 3311c of the second movable member through the connection member 332, the first connection portion 1131 a of the second movable member 3312 is movably connected to the first limiting plate 313, and the connection member 332 penetrates through the first connection portion 3311a and the first connection through hole 113b to hinge one end of the second movable member 3312 to the first limiting plate 1131. When the extension member 31 moves in the left-right direction, the end of the extension member 31 connected to the first movable member 3311 moves in the left-right direction along with the extension member 31, so that the coupling end of the first movable member 3311 connected to the second movable member 3312 is pushed to move in the front-rear direction, i.e., the coupling end of the first movable member 3311 and the second movable member 3312 gradually increases toward a direction away from the case 1 or gradually decreases toward a direction close to the case. The second movable member 3312 further has a contact portion 3312a which cooperates with the stationary push rod 100 of the electrophotographic apparatus to control the contact and separation of the developing roller 2 with and from the photosensitive drum. The connecting member 332 has various structures for connecting, and in this embodiment, the connecting member 332 is a pin.

Fig. 13 is a view showing an operation state of the separation mechanism when the developing roller and the photosensitive drum are separated according to the first embodiment. After the developing cartridge is installed in the electronic imaging apparatus, the two fixed push rods 100 of the electronic imaging apparatus are in a non-contact state with the contact portions 3312a of the two separating members 33, respectively, when the electronic imaging apparatus is in operation, the separating mechanism 3 is located at an initial position, the photosensitive drum is in close contact with the developing roller 2, when the electronic imaging apparatus is finished operating, the photosensitive drum needs to be separated from the developing roller 2, at this time, the separating push rod 200 of the electronic imaging apparatus is in contact with the receiving portion 311 of the extending member 31 to apply a force in a left-right direction to the extending member, the extending member 31 moves relative to the cartridge body 1 in the left-right direction under the action of the force, the limiting portion 313 compresses the elastic member 32 along with the movement of the extending member 31, and further, the movable member 331 moves in a front-back direction (one end of the first movable member 3311 connected with the second movable member 3312 gradually rises in a front-back direction away from the cartridge body 1), and further, the contact portion 3312a of the second movable member 3312 contacts with the fixed push rod 100 and pushes the fixed push rod 100, thereby fixed push rod 100 exerts the pressure of reaction to the contact portion 3312a of second moving part 3312 to form the thrust of separator 33 to the lid 11 of box body, and then form the power that the developing cartridge kept away from to the sensitization drum direction, force the developing cartridge towards the direction motion of keeping away from the sensitization drum, make and can pull open the distance between developing roller and the sensitization drum. The extension member 31 moves leftward in the left-right direction with respect to the case 11, and the elastic member 32 is compressed to store elastic potential energy, and the stabilized position is the separation position of the separation mechanism 3.

Fig. 14 is a view showing an operation state of the separation mechanism when the developing roller and the photosensitive drum are in contact according to the first embodiment. When the electronic imaging device needs to start working, the force of the separation push rod 200 on the receiving portion 31a of the extension 31 needs to be cancelled, the elastic member 32 releases the elastic potential energy, the extension 31 moves to the right in the left-right direction relative to the case 11, at the same time, the end of the first movable member 3311 connected to the second movable member 3312 is driven to move forward (i.e., the end of the first movable member 3311 connected to the second movable member 3312 relative to the case 1 gradually descends toward the case 1), at this time, the contact portion 3312a of the movable member 332 is separated from the fixed push rod 100, thereby restoring the separation mechanism 3 to the initial position where the developing cartridge is forced to move toward the direction close to the photosensitive drum by the combined action of the gravity of the developing cartridge and the separation push rod 200 (canceling force) of the electrophotographic apparatus, thereby bringing the developing roller 2 into close contact with the photosensitive drum.

Fig. 15 is a perspective view showing a combination of the separating mechanism according to a modification of the second embodiment. The elastic member 32 is disposed between the second stopper plate 1132 and the third stopper plate 1133, and one end of the elastic member 32 abuts against the third stopper plate 1133 of the lid 11 and the other end abuts against the regulating portion 313 of the extension member 31. When the electronic imaging device finishes working, the photosensitive drum needs to be separated from the developing roller 2, at this time, the separation push rod 200 of the electronic imaging device contacts with the receiving portion 311 of the extension piece 31, a force in the left-right direction is applied to the separation push rod, the extension piece 31 moves relative to the box body 1 in the left-right direction under the action of the force, the limiting portion 313 compresses the elastic piece 32 along with the movement of the extension piece 31, so that the movable piece 331 moves in the front-back direction, further the contact portion 3312a of the second movable piece 3312 contacts with the fixed push rod 100, further the fixed push rod 100 applies a reaction pressure to the contact portion 3312a of the second movable piece 3312, further a pushing force of the separation piece 33 to the box cover 11 of the box body is formed, further a force of the developing box to be far away from the photosensitive drum is formed, the developing box is forced to move in the direction far away from the photosensitive drum, and a distance between the developing roller and the photosensitive drum can be separated. The extension member 31 moves leftward in the left-right direction with respect to the case, and the elastic member 32 stores elastic potential energy, and the stabilized position is the separation position of the separation mechanism 3.

The other component arrangements of the separating mechanism 3 and the working state of the separating mechanism when the electronic imaging device starts to work are as described in embodiment two, and are not described again here.

Fig. 12 and 16 are perspective views showing a separating mechanism according to another modification of the second embodiment. The extending member 31 is provided with the abutting portion 312 as in the first embodiment, the elastic member 32 is disposed between the abutting portion 312 and the limiting portion 313, the elastic member 32 is sleeved on the extending member 31, one end of the elastic member 32 abuts against the circular hole 112 of the box cover 11, and the other end abuts against the abutting portion 312 of the extending member 31. When the electronic imaging device finishes working, the photosensitive drum needs to be separated from the developing roller 2, at this time, the separation push rod 200 contacts with the receiving portion 311 of the extension piece 31 to apply a force in the left-right direction to the extension piece 31, the extension piece 31 moves relative to the box body 1 in the left-right direction under the action of the force, the abutting portion 312 compresses the elastic piece 32 along with the movement of the extension piece 31, the movable piece 331 further moves in the front-back direction, the contact portion 3312a of the second movable piece 3312 contacts with the fixed push rod 100, and the fixed push rod 100 applies a pressure of a reaction to the contact portion 3312a of the movable piece 332, so that a pushing force of the separation piece 33 to the box cover 11 of the box body 1 is formed, and further a force of the developing box to be far away from the photosensitive drum is formed, the developing box is forced to move in a direction far away from the photosensitive drum, and a distance between the developing roller 2 and the photosensitive drum can be pulled apart. The extension member 31 moves leftward in the left-right direction with respect to the case, and the elastic member 32 stores elastic potential energy, and the stabilized position is the separation position of the separation mechanism 3.

The other component arrangements of the separating mechanism 3 and the working state of the separating mechanism when the electronic imaging device starts to work are as described in embodiment two, and are not described again here.

EXAMPLE III

As an explanation of the third embodiment provided by the present invention, only differences from the above-described first and second embodiments will be explained below. As shown in fig. 17 to 19, the box cover 11 in this embodiment has a groove 111 and a first connecting portion 112, the groove 111 further defines a first hole 111a, the first connecting portion 112 defines a second hole 112a, the first connecting portion 112 can be disposed at one end (for example, the right end) of the box cover 11, the first connecting portion 112 can be a bump, and the second hole 112a is disposed through the bump. The elastic member 32 is connected to the second hole 112a of the first connecting portion 112 at one end, the elastic member 32 is preferably a tension spring, the elastic member 32 is made of any material capable of providing a desired elastic force, and the extension member 31 is disposed in the groove 111.

As shown in fig. 18, the extension member 31 has a receiving portion 311, a second connecting portion 312 and a joint portion 313, the second connecting portion 312 is a projection provided on the extension member 31, a third hole 312a is opened on the second connecting portion 312, the other end of the elastic member 32 is connected with the third hole 312a of the second connecting portion 312, and the receiving portion 311 is in contact fit with a separation push rod of the electronic imaging device to control the contact and separation states of the separation mechanism 3. The joint portion 313 is a strip-shaped hole formed in the extension 31, and the joint portion 313 is provided with a fourth hole 313b provided through a side wall thereof.

As shown in fig. 19, the separating member 33 is a movable link structure, and in this embodiment, two separating members are provided, which can cooperate with two fixed push rods 100 of the electrophotographic apparatus to control the contact and separation of the developing roller 2 with and from the photosensitive drum of the electrophotographic apparatus. In the assembled state, one end of the elastic member 32 is movably connected to the second hole 112a of the first connection portion 112 of the box cover 11, the other end is movably connected to the third hole 312a of the second connection portion 312 of the extension member 31, and the separation member 33 is movably connected to the engagement portion 313 of the extension member 31 and the groove 111 of the box cover 11, respectively.

As shown in fig. 19 and 20, the separating member 33 has a moving member 331, the moving member 331 has a first matching portion 3311 and a second matching portion 3312, the first matching portion 3311 and the second matching portion 3312 are respectively provided with a fifth hole 331a and a sixth hole 331b, the first matching portion 3311 is movably connected with the groove 111, the first hole 111a and the fifth hole 331a on the groove 111 are hinged by passing the connecting member 332 through the groove, the second matching portion 3312 is movably connected with the extending member 31, the second matching portion 3312 is inserted into the connecting portion 313, and then the connecting member 332 passes through the fourth hole 313b and the sixth hole 331b to hinge the first matching portion 3311 and the second matching portion 331 b. When the extending member 31 moves in the left-right direction, the end of the movable member 331 coupled to the extending member 31 is pushed to move in the front-back direction, that is, the coupled end of the movable member 331 and the extending member 31 gradually decreases toward the box body 1 or gradually increases toward the direction away from the box body 1, and at the same time, the extending member 31 also moves in the front-back direction. The moving member 331 further has a contact portion 331c, and the contact portion 331c may be an end portion of the second engagement portion 3312 of the moving member, and the contact portion 331c may protrude from the engagement portion 313 when moving, and may cooperate with a stationary push rod of the electronic image forming apparatus to control the developing roller to contact and separate from the photosensitive drum of the electronic image forming apparatus. The connecting member 332 has various structures for connecting, and in this embodiment, the connecting member 332 is a pin.

Fig. 21 is a view showing an operation state of the separation mechanism 3 when the developing roller 2 and the photosensitive drum are separated according to the first embodiment. After the developing cartridge is installed in the electronic imaging device, the two fixed push rods 100 of the electronic imaging device are respectively in a non-contact state with the contact portions 331c of the two separating members 33, when the electronic imaging device is in operation, the separating mechanism 3 is located at an initial position, the photosensitive drum is in close contact with the developing roller 2, when the electronic imaging device is finished operating, the photosensitive drum needs to be separated from the developing roller 2, at this time, the separating push rod 200 of the electronic imaging device is in contact with the receiving portion 311 of the extending member 31, a force is applied to the extending member 31 in the left-right direction, the extending member 31 moves relative to the cartridge body 1 in the left-right direction under the action of the force, so that the movable member 331 of the separating member 33 moves in the front-back direction, the extending member 31 also moves in the front-back direction, and the contact portion 331c of the movable member 331 is in contact with the fixed push rods 100, so that the fixed push rods 100 apply a pressure to the contact portion 331c of the movable member 331, thereby form the thrust of separator 33 to the lid 11 of box body, and then form the power that the development box kept away from to the sensitization drum direction, force the development box towards the direction motion of keeping away from the sensitization drum for can pull open the distance between developer roll and the sensitization drum. The extension member 31 moves leftward in the left-right direction with respect to the case and moves forward in the front-rear direction with respect to the case, and at this time, the elastic member 32 is stretched along with the movement of the extension member 31, and the elastic member 32 stores elastic potential energy, and the stabilized position is the separation position of the separation mechanism 3.

Fig. 22 is a view showing an operation state of the separation mechanism when the developing roller and the photosensitive drum are in contact according to the first embodiment. When the electronic imaging device needs to start working, the acting force of the separation push rod 200 on the receiving part 31a of the extension piece 31 needs to be cancelled, the elastic piece 32 releases elastic potential energy, meanwhile, under the action of the gravity of the developing box and the action of the pushing mechanism of the electronic imaging device, the extension piece 31 moves rightwards relative to the box body in the left-right direction, the separation mechanism 3 restores to the initial position, the developing box is forced to move towards the direction close to the photosensitive drum, and therefore the developing roller 2 is in close contact with the photosensitive drum.

In the description of the present invention, it is to be understood that the terms "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," …, and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second" … may explicitly or implicitly include one or more of that feature.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims (10)

1. A developing cartridge detachably mountable to an electrophotographic apparatus, the electrophotographic apparatus including a photosensitive drum and a separation push rod;

the developing box comprises a box body, a developing roller is arranged on the box body, and the developing box is characterized in that:

the separation mechanism comprises an extension piece arranged on the box body and a separation piece movably connected with the extension piece;

the extension member moves under the action of the separation push rod, and the separation member obtains the action force and rises towards the direction far away from the box body so as to separate the photosensitive drum from the developing roller.

2. A developing cartridge according to claim 1, wherein said separating member has a movable member and a supporting member, and wherein said movable member has one end movably connected to said supporting member and the other end movably connected to said extending member;

when the extension piece is in when the effect of separation push rod moves down, the moving part for the extension piece motion, and drive support piece linkage makes its orientation keep away from the direction of box body risees gradually to support piece with be equipped with in the electron image device when fixed push rod takes place the butt, the sensitization drum with the separation is realized to the developer roll.

3. A developing cartridge according to claim 2, wherein there are two of the movable members, and the two movable members are movably connected to both ends of the supporting member, respectively.

4. A developing cartridge according to claim 1, wherein said separating member includes a movable member movably connected to said extension member, said movable member having a first movable member and a second movable member, one end of said first movable member being movably connected to said cartridge body and the other end thereof being movably connected to one end of said second movable member, the other end of said second movable member being movably connected to said extension member;

when the extension piece moves under the action of the force of the separation push rod and drives the first moving piece and the second moving piece to be linked, the coupling end of the first moving piece and the second moving piece gradually rises towards the direction far away from the box body until the coupling end abuts against a fixed push rod arranged in the electronic imaging device, and the photosensitive drum is separated from the developing roller.

5. A developing cartridge according to claim 1, wherein said separating member includes a movable member having one end movably connected to said cartridge body and the other end movably connected to said extending member;

when the extension piece is in when the effect of separation push rod moves down, and drive the moving part linkage, the order the moving part with the one end orientation that the extension piece is coupled is kept away from the direction of box body risees gradually to with when the fixed push rod that is equipped with takes place the butt in the electronic imaging device, the separation is realized with the developer roll to the sensitization drum.

6. A developing cartridge according to claim 4, wherein the cartridge body is provided with at least one limiting plate, and the limiting plate is provided with a first connecting through hole for movably connecting with the first movable member.

7. A developing cartridge according to claim 4, wherein the cartridge body is provided with at least one position-limiting plate, and the position-limiting plate is provided with a position-limiting through hole for mounting the extending member.

8. A developing cartridge according to any one of claims 1 to 7, wherein said separating mechanism further comprises an elastic member having one end abutting or connected to said extending member and the other end abutting or connected to said cartridge body, said extending member being capable of being reset by said elastic member.

9. A developing cartridge according to any one of claims 1 to 7, wherein said separating member is at least two in number and is provided at intervals in an axial direction of said extending member.

10. A developing cartridge according to any one of claims 1 to 7, wherein said cartridge body includes a cartridge cover, a groove is provided on said cartridge cover, and said extension member is provided in said groove.

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