Developing box

Abstract

The utility model discloses a developing box. The developing box is detachably mounted on an electrophotographic imaging device; the developing cartridge includes: a housing; a developing roller; an input gear; a chip having an electrical contact surface; the chip rack is used for supporting the chip and the electric contact surface of the chip; the electrical contact surface is movable relative to the housing between a first position and a second position; at the first position, a first distance is formed between the tail end of the chip rack in the third direction and the electric contact surface, and the third direction is crossed with the first direction and the second direction; at the second position, a second distance is formed between the tail end of the chip rack in the third direction and the electric contact surface; the difference between the first distance and the second distance is greater than or equal to 5.2 mm; the developing box disclosed by the utility model can prevent the condition that the electrical connection between the developing box and the imaging device is deviated due to the size error of the imaging device or the developing box.

Description

Technical Field

[0001] The utility model relates to the technical field of printer consumables, in particular to a developing box. Background Art

[0002] The electronic photographic imaging device includes a main body of the electronic photographic imaging device and a developing box and a drum box that are detachably installed inside the electronic photographic imaging device; the developing box includes a storage chip, and the storage medium is configured as a storage chip that stores information such as the model and capacity of the developing box. The storage chip is installed to the left side of the developing box in the left-right direction through a chip rack; the storage chip has an electrical contact surface for connecting to the electronic photographic imaging device. When in use, the developing box is installed to the electronic photographic imaging device, and the electrical contact surface is electrically connected to the electronic photographic imaging device, so that the electronic photographic imaging device and the developing box establish a communication connection.

[0003] In the prior art, in order to achieve the connection between the developer box and the electronic photographic imaging device, a guide groove is provided inside the electronic photographic imaging device, and an electrical contact point is provided on the top of the guide groove. After the developer box is installed on the electronic photographic imaging device, the electrical contact surface of the developer box contacts and connects with the electrical contact point; a chip rack that can be relatively moved is provided on the electrical contact surface, that is, the electrical contact surface of the developer box can move relative to the main body of the developer box, making the positioning between the electrical contact surface and the electrical contact point extremely difficult. Here, a simple positioning method is needed to limit the position between the electrical contact surface and the electrical contact point when the developer box is installed on the electronic photographic carrier. Utility Model Content

[0004] Therefore, the present invention provides a developing cartridge to solve the above technical problems, which is mainly achieved through the following technical solutions:

[0005] A developing cartridge is detachably mounted to an electrophotographic imaging device; the developing cartridge comprises:

[0006] a housing for accommodating a developer, the housing having a first side in a first direction and a second side separated from the first side, the housing having a third side in a second direction intersecting the first direction and a fourth side separated from the third side;

[0007] a developing roller, located on the third side of the housing and rotatable about a developing roller axis extending in the first direction;

[0008] an input gear, capable of receiving a driving force from outside the developing cartridge to rotate about an input gear axis extending in the first direction, and located on the first side of the housing;

[0009] a chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing;

[0010] a chip holder for supporting the chip and the electrical contact surface thereof;

[0011] the electrical contact surface being movable relative to the housing between a first position and a second position;

[0012] In the first position, a first distance exists between an end of the chip rack in a third direction and the electrical contact surface, and the third direction is arranged to intersect the first direction and the second direction;

[0013] In the second position, the chip carrier has a second distance between an end in the third direction and the electrical contact surface;

[0014] A difference between the first distance and the second distance is greater than or equal to 5.2 mm.

[0015] Furthermore, the chip rack includes a main body, a supporting part, and an elastic member; the main body, the elastic member, and the supporting part are arranged in the third direction.

[0016] Furthermore, the main body is used to support the chip and the electrical contact surface, and the supporting portion is movable relative to the main body.

[0017] Furthermore, the chip rack is located on the first side of the housing in the first direction, and the chip rack is located on the fourth side of the housing in the second direction.

[0018] Furthermore, the housing further comprises a protective cover, the protective cover being used to cover at least a portion of the input gear;

[0019] The chip frame includes a supporting portion, and the supporting portion and the protective cover are integrally formed.

[0020] Furthermore, the chip rack further comprises a main body portion for supporting the chip and the electrical contact surface;

[0021] The main body and the support part are connected by screws.

[0022] Furthermore, a force-bearing surface is provided on the top of the chip rack in the third direction, and the force-bearing surface can receive the force outside the developing box to drive the chip rack to move between the first position and the second position.

[0023] Furthermore, the force-bearing surface is extended in the first direction, and the force-bearing surface is constructed as an inclined surface that intersects the second direction and the third direction.

[0024] Furthermore, it further comprises a cover located on the first side of the housing in the first direction, wherein a chip rack accommodating portion is formed between the cover and the housing;

[0025] At least a portion of the chip rack is located inside the chip rack accommodating portion.

[0026] A guide groove is provided in the electronic photographic device of the utility model, a limiting groove is provided on the guide groove, and an electrical contact point is provided inside the limiting groove. After the developing box is installed on the electronic photographic imaging device, the electrical contact surface enters the interior of the limiting groove and contacts the electrical contact point inside the limiting groove, so that the electrical contact surface contacts the electrical contact point, ensuring a stable connection between the electrical contact surface and the electrical contact point. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural diagram of the developing box of the utility model;

[0028] Figure 2 It is a three-dimensional structural diagram of the developing box of the utility model from another angle;

[0029] Figure 3 It is a side sectional schematic diagram in the vertical direction of the developing cartridge of the present invention;

[0030] Figure 4 This is a partial exploded view of the left end portion of the developer cartridge of the present invention;

[0031] Figure 5 It is a schematic diagram of the left side of the end cover of the utility model;

[0032] Figure 6 This is an exploded schematic diagram of the guide rail and chip rack of the utility model;

[0033] Figure 7 This is a left view of the chip rack of the utility model in its longest state;

[0034] Figure 8 This is a left side view of the chip rack of the utility model in its shortest state;

[0035] Figure 9 It is a schematic diagram of the left side of the guide rail of the utility model;

[0036] Figure 10 This is a schematic diagram of the left side of the guide rail in another embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the positional relationship between the developer cartridge of the present invention when it is installed on the front chip rack and the guide rail of the imaging device;

[0038] Figure 12 This is a schematic diagram of the positional relationship between the chip holder and the guide rail after the developer cartridge of the present invention is installed in the imaging device;

[0039] Figure 13 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 2 of the present utility model;

[0040] Figure 14 This is an exploded schematic diagram of the chip rack in Example 2 of the present utility model;

[0041] Figure 15 This is a vertical cross-sectional view of the chip rack in Example 2 of the present utility model;

[0042] Figure 16 Schematic diagram comparing two states of the chip rack in Example 2 of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and technical effect of the embodiment of the present invention more clear, the technical solution of the process cartridge of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiment described is only a preferred embodiment of the present invention, not the only embodiment. Based on the embodiment of the present invention, other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention. Example 1

[0044] In the following description, when referring to the direction of the developing box 100, the axial direction of the developing roller 120 is taken as the first direction (left-right direction), and the end cover 112 is located on the left side of the developing roller 120; the second direction (front-back direction) is defined as the arrangement direction of the axis of the developing roller and the axis of the stirring frame, and the developing roller 120 is located on the front side of the stirring frame 140; the third direction (up-down direction) is the direction intersecting the first direction and the second direction; preferably, the up-down direction is the direction orthogonal to the left-right direction and the up-down direction.

[0045] 1. Electronic photographic imaging device

[0046] The present invention provides an electronic photographic imaging device (hereinafter referred to as "imaging device"), and a developing box 100 that can be used in conjunction with the imaging device. The developing box 100 can be installed in the imaging device in a detachable manner. A guide portion and an electrical contact member are provided on one side of the interior of the imaging device. Specifically, the guide portion is constructed as a guide rail 11, which is used to guide the developing box 100 to be installed inside the imaging device; the electrical contact member is constructed as an electrical contact point 12, which is used for the developing box 100 to establish a communication link.

[0047] Specifically, such as Figure 9As shown, the guide rail 11 includes an upper guide rail 11a and a lower guide rail 11b. The upper guide rail 11a is provided with a limiting groove 13, and the electrical contact point 12 is disposed within the limiting groove 13. The limiting groove 13 includes a rear side wall having a first guide surface 11a1 and a second guide surface 11a2, and a protrusion 11a3 located between the first guide surface 11a1 and the second guide surface 11a2. The first guide surface 11a1 faces rearward and downward, while the second guide surface 11a2 faces forward and downward. The lower guide rail 11b is provided with a recess 11b1 at a position corresponding to the limiting groove 13, and a convex portion 11b2 is provided on the rear side of the recess 11b1. The distance between the protrusion 11a3 and the convex portion 11b2 is a third length L3, and the distance between the top of the limiting groove 13 and the recess 11b1 is a fourth length L4. The depth of the limiting groove 13 is H1, and an elastic member (not shown) is provided above the electrical contact point 12 so that the electrical contact point 12 can move relative to the limiting groove 13.

[0048] Preferably, the depth H1 of the limiting groove 13 ranges from 1.5 mm to 5 mm.

[0049] 2. Developer box

[0050] like Figure 1-4 As shown, an electronic photographic imaging device 100 according to an embodiment of the present invention is shown, which can be installed in an imaging device in a detachable manner to cooperate with the imaging device to complete the imaging operation; the developing box 100 includes a shell 110 as a main body, and the shell 110 includes a left side and a right side that are separately set in the left-right direction, a front side and a rear side that are separately set in the front-to-back direction, and a top and a bottom that are separately set in the up-down direction. The shell 110 includes a main body 111 for accommodating the developer, and an end cover 112 that can be detachably installed on the left side of the main body 111; the main body 111 has a handle 111a for the user to hold; the end cover 112 can cover at least a part of the gear train located on one side of the main body 111. Preferably, in this embodiment, the above-mentioned gear train and the end cover 112 are located on the left side of the main body 111 in the left-right direction. As shown Figure 4As shown, the gear system includes but is not limited to a coupling 150 for receiving the driving force from the imaging device, a developing roller gear 121, a powder feeding roller gear 131, a stirring frame gear 141 and a counting gear 171; the coupling 150 can be engaged with the developing roller gear 121 and the powder feeding roller gear 131 to drive the developing roller gear 121 and the powder feeding roller gear 131 to rotate; the coupling 150 is engaged with the stirring frame gear 141 through the idler gear 151, so that the coupling 150 drives the stirring frame gear 141 to rotate through the idler gear 151; the stirring frame gear 141 can be engaged with the counting gear 171, so that the stirring frame gear 141 can drive the counting gear 171 to rotate. The developing box 100 also includes a developing roller 120, a powder feeding roller 130 and a stirring frame 140. The left ends of the developing roller 120, the powder feeding roller 130 and the stirring frame 140 are respectively connected to the developing roller gear 121, the powder feeding roller gear 131 and the stirring frame gear 141, and each gear drives the developing roller 120, the powder feeding roller 130 and the stirring frame 140 to rotate along their respective axes extending in the left and right directions; the developing roller 120 is arranged on the front side of the housing 110 in the front-to-back direction, and is arranged on the developing box 100. When installed in the drum cartridge, the developing roller 120 contacts the photosensitive drum in the drum cartridge; when the coupling 150 receives the driving force of the imaging device, the coupling 150 drives the developing roller 120, the powder feeding roller 130 and the stirring frame 140 to rotate respectively; the stirring frame 140 is used to stir the developer inside the housing 110 and transport the developer to the powder feeding roller 130, and the powder feeding roller 130 then transports the developer to the developing roller 120, and the developing roller 120 transfers the developer to the photosensitive drum to develop the electrostatic latent image on the photosensitive drum.

[0051] The counting gear 171 is engaged with the stirring frame gear 141 and can rotate along with the rotation of the stirring frame gear 141. In this embodiment, the counting gear 171 is constructed as a half-tooth gear. The developing box 100 also includes a transmission rod 172 and a toggle protrusion 170. The transmission rod 172 spans the left and right sides of the developing box 100 in the left and right directions. The toggle protrusion 170 is arranged on the right side of the transmission rod 172, and the toggle protrusion 170 is arranged above the right side of the shell 110. The transmission rod 172 can move in the left and right directions under the drive of the counting gear 171 and drive the toggle protrusion 170 to move in the left and right directions. The toggle protrusion 170 can toggle the counting device of the imaging device to complete the counting.

[0052] The developing box 100 is also provided with an electrode 160, which includes an electrical contact portion arranged on the right side of the developing box 100, and the electrical contact portion can be electrically connected to a power supply component (not shown) inside the imaging device. The electrode 160 is electrically connected to the power supply component through the electrical contact portion to receive power from the imaging device and supply power to the developing roller 120 and the powder feeding roller 130 to ensure that the developer can be stably transported.

[0053] like Figure 5-6As shown, the developer cartridge 100 also includes a chip holder 200 and a chip 300 supported by the chip holder 200. The chip 300 includes an electrical contact surface 310 and a storage portion (not shown). When the developer cartridge 100 is installed in an imaging device, the electrical contact surface 310 can contact the electrical contact points 12 of the imaging device, thereby establishing a communication connection between the developer cartridge 100 and the imaging device. The storage portion is used to record information such as the model, age, and page yield of the developer cartridge 100. The storage portion is electrically connected to the electrical contact surface 310. When the developer cartridge 100 is installed in the imaging device, the storage portion establishes an electrical connection with the imaging device via the electrical contact surface 310 and the electrical contact points 12, thereby establishing a communication connection between the developer cartridge 100 and the imaging device. In this way, the imaging device can read information about the developer cartridge 100. When the developer in the developer cartridge 100 is about to be exhausted, the imaging device can prompt the user to replace the developer cartridge 100 with a new one via the operation panel. The electrical contact surfaces 310 are multiple and are arranged in sequence in the front-to-back direction.

[0054] The chip rack 200 includes a main body 210, a support portion 220, and an elastic portion 230. The chip rack 200 is located on the left side of the housing 110. A limit cap 240 is also provided on the left side of the housing 110 to limit the left-right movement of the chip rack 200. Specifically, the chip rack 200 is located on the left side of the end cap 112. The limit cap 240, the main body 210, and the end cap 112 are arranged sequentially from left to right in the left-right direction. The main body 210, the elastic portion 230, and the support portion 220 are arranged sequentially from top to bottom in the vertical direction. A mounting groove 210a for mounting the chip 300 is provided at the top of the main body 210 in the vertical direction. The chip 300 is secured in the mounting groove 210a by gluing or snapping.

[0055] A first inclined surface 210b is provided on the side of the top of the main body 210 close to the developing roller 120 and is inclined to the electrical contact surface 310, and a second inclined surface 210c is provided on the side of the top of the main body 210 away from the developing roller 120 and is inclined to the electrical contact surface 310; specifically, the first inclined surface 210b faces forward and upward, and the second inclined surface 210c faces rearward and upward.

[0056] When the developing cartridge 100 is mounted on the imaging device, the chip holder 200 on the left side of the developing cartridge 100 contacts the guide rail 11; Figure 11-12As shown, during the installation process, the chip holder 200 contacts the first guide surface 11a1 of the guide rail 11, and under the action of the thrust, the first guide surface 11a1 applies a downward force to the first inclined surface 210b. At this time, the elastic portion 230 is compressed, so that the chip holder 200 is compressed from the maximum length to a distance less than the distance L3 between the protrusion 11a3 and the convex portion 11b2, so that the chip holder 200 can pass over the rear side wall. At this time, under the action of the continuous thrust provided by the user to the developer cartridge 100, the chip holder 200 passes over the rear side wall and enters Below the limiting groove 13, at the same time, the elastic part 230 stretches due to the release of elastic potential, the chip frame 300 stretches upward and drives the chip 300 and its electrical contact surface 310 to enter the limiting groove 13, so that the electrical contact surface 310 contacts the electrical contact point 12, so that the developing box 100 and the imaging device 10 establish a communication link; at this time, the electrical contact surface 310 can only move up and down along the guide groove, thereby limiting the relative position of the electrical contact surface 310 and the electrical contact point 12, thereby ensuring the stability of the connection between the electrical contact surface 310 and the electrical contact point 12.

[0057] like Figure 7-9 As shown, the distance L between the electrical contact surface 310 of the chip 300 and the bottom of the chip holder 200 in the vertical direction is variable, with L having a maximum value (maximum length) L1 and a minimum value (minimum length) L2. The value of L ranges from 24.6 mm to 29.8 mm, with L1 being 29.8 mm and L2 being 24.6 mm. The minimum deformation S (L1-L2) of the chip holder 200 is 5.2 mm. The minimum deformation S (5.2 mm) of the chip holder 200 is greater than the maximum depth H1 (5 mm) of the retaining groove 13, thereby ensuring that the electrical contact surface 310 contacts the electrical contact point 12 after the chip holder 200 enters the retaining groove 13.

[0058] Specifically, in one embodiment of the present invention, the value of H1 is 1.5 mm, the value of L1 is 29.8 mm, the value of L2 is 24.6 mm, the value of L3 is 26.9 mm, and the value of L4 is 24.9 mm; the length of the electrical contact 12 ranges from 1 mm to 1.5 mm, and an elastic member (not shown) is provided above the electrical contact 12 so that the electrical contact 12 can move relative to the limiting groove 13; Figure 11-12In the process shown, the user applies a forward thrust to the developer cartridge 100. At this time, the developer cartridge 100 moves forward. During the movement, the first inclined surface 210b of the chip holder main body 210 contacts the first guide surface 11a1. Under the action of the thrust, the first guide surface 11a1 applies a downward force to the first inclined surface 210b, compressing the elastic portion 230, compressing the length of the chip holder 100 from 29.8mm to less than 24.9mm. Under the action of the thrust, the chip holder 200 enters the lower part of the limiting groove 13. At the same time, the chip holder 200 extends upward under the action of the elastic portion 230 and drives the electrical contact surface 310 of the chip 300 to enter the interior of the limiting groove 13, thereby connecting the electrical contact surface 310 to the electrical contact point 12. At this time, the electrical contact surface 310 can only move up and down along the guide groove, thereby limiting the relative position of the electrical contact surface 310 and the electrical contact point 12, thereby ensuring the stability of the connection between the electrical contact surface 310 and the electrical contact point 12.

[0059] Specifically, in another embodiment of the present invention, the value of H1 is 5 mm, the value of L1 is 29.8 mm, the value of L2 is 24.6 mm; the value of L3 is 30.4 mm, the value of L4 is 24.9 mm; the length of the electrical contact 12 is 1.5 mm, and the electrical contact 12 can move relative to the limiting groove 13; Figure 11-12 In the process shown, the first inclined surface 210b of the chip rack main body 210 contacts the first guide surface 11a1, and with the cooperation of the first guide surface 11a1, the length of the chip rack 200 is compressed from 29.8mm to less than 24.9mm, so that the chip rack 200 passes over the rear side wall located on the rear side of the limiting groove 13 and enters the interior of the limiting groove 13. Under the push of the elastic part of the electrical contact point 13 and the elastic part 230 of the chip rack 200, the electrical contact surface 310 is connected to the electrical contact point 12; at this time, the electrical contact surface 310 can only move up and down along the guide groove, thereby limiting the relative position of the electrical contact surface 310 and the electrical contact point 12, thereby ensuring the stability of the connection between the electrical contact surface 310 and the electrical contact point 12.

[0060] When the developer box 100 is separated from the imaging device, the user applies a backward pulling force to the developer box 100, thereby moving the developer box 100 backward in the front-to-back direction. At this time, the second inclined surface 210c of the chip frame 200 contacts the second guide surface 11a2 of the upper guide rail, and under the action of the pulling force, the second guide surface 11a2 generates a downward thrust on the second inclined surface 210c, thereby compressing the chip frame 200 to a shorter length. At this time, under the action of the pulling force, the chip frame 200 passes over the rear side wall of the limiting groove 13, thereby causing the chip frame 200 to leave the range of the limiting groove 13, and under the continuous action of the pulling force, the developer box 100 leaves the interior of the imaging device, making it convenient to replace the developer box 100.

[0061] like Figure 10 As shown, optionally, in other embodiments, the lower guide rail 11b can be set to extend substantially in a direction parallel to the front-rear direction, thereby simplifying the structure of the imaging device and reducing the production cost of the imaging device. Example 2

[0062] Next, we will combine the Figure 13-16 The second embodiment of the present invention is described in detail. This embodiment provides an electronic photographic imaging device. The similarities between the developer cartridge of this embodiment and the developer cartridge of the first embodiment will not be repeated in this embodiment. The difference is that the support portion 420 of the chip holder 400 is integrally provided with the end cap 112. The chip holder 400 further includes a main body 410, an elastic member 430, and a screw 440. The elastic member 430 is located between the main body 410 and the support portion 420. The screw 440 is connected to the bottom of the main body 410 and passes through a through hole of the support portion 420 to the bottom of the support portion 420. In the vertical direction, the chip 300, the main body 410, the elastic member, the support portion 420, and the screw 440 are arranged in order from top to bottom. Furthermore, to prevent the main body 410 from moving in directions other than the vertical direction, a limiting protrusion and a limiting groove are provided on the main body 410 and the support portion 420, respectively.

[0063] In the chip holder 400, the support portion 420 is fixed to the housing 110, and the main body 410 is movable relative to the housing 110. That is, the chip 300 and the chip electrical contact surface 310 disposed inside the mounting groove 410a at the top of the main body 410 are movable relative to the housing 110. The top front side of the main body 410 is provided with a first inclined surface 410b facing forward and upward, and the top rear side of the main body 410 is provided with a second inclined surface 410c facing rear and upward. As described in the first embodiment above, when the developing cartridge 100 is directed toward the imaging device, During the installation process, the user applies a thrust to the developer cartridge 100, causing it to move forward in the front-to-back direction. During this movement, the first inclined surface 410b contacts the first guide surface 11a1. Under the action of the thrust, the first guide surface 11a1 applies a downward force to the first inclined surface 410b, compressing the length of the chip holder 100, thereby allowing the chip holder 400 to enter the interior of the limiting groove 13. Under the push of the elastic portion 430 of the chip holder 400, the electrical contact surface 310 is connected to the electrical contact point 12. At this time, the electrical contact surface 310 can only move up and down along the guide groove, thereby limiting the relative position of the electrical contact surface 310 and the electrical contact point 12, thereby ensuring the stability of the connection between the electrical contact surface 310 and the electrical contact point 12.

[0064] Specifically, such as Figure 16As shown, the distance L between the electrical contact surface 310 of the chip 300 and the bottom of the chip holder 400 is variable in the vertical direction, with L having a maximum value (maximum length) LI and a minimum value (minimum length) L2. The minimum deformation S (L1-L2) of the chip holder 400 is 5.2 mm. This minimum deformation S (5.2 mm) is greater than the maximum depth H1 of the retaining groove 13 (5 mm), ensuring that the electrical contact surface 310 contacts the electrical contact point 12 after the chip holder 400 enters the retaining groove 13.

[0065] The process of separating the developing box 100 from the imaging device is substantially similar to that in the above-mentioned embodiment 1, and will not be repeated here.

[0066] Alternatively, in this embodiment, the imaging device may no longer be provided with the lower guide rail 11 b, thereby simplifying the structure of the imaging device and reducing the production cost of the imaging device.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A developing cartridge, wherein the developing cartridge can be detachably mounted to an electrophotographic imaging device; the developing cartridge comprises: a housing for accommodating a developer, the housing having a first side in a first direction and a second side separated from the first side, the housing having a third side in a second direction intersecting the first direction and a fourth side separated from the third side; a developing roller, located on the third side of the housing and rotatable about a developing roller axis extending in the first direction; an input gear, capable of receiving a driving force from outside the developing cartridge to rotate about an input gear axis extending in the first direction, and located on the first side of the housing; a chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing; It is characterized by further comprising a chip rack for supporting the chip and the electrical contact surface thereof; the electrical contact surface being movable relative to the housing between a first position and a second position; In the first position, a first distance exists between an end of the chip rack in a third direction and the electrical contact surface, the third direction being arranged to intersect the first direction and the second direction; In the second position, the chip carrier has a second distance between an end in the third direction and the electrical contact surface; A difference between the first distance and the second distance is greater than or equal to 5.2 mm.

2. The developing cartridge according to claim 1, wherein The chip rack includes a main body, a supporting part, and an elastic member; the main body, the elastic member, and the supporting part are arranged in the third direction.

3. The developing cartridge according to claim 2, wherein: The main body portion is used to support the chip and the electrical contact surface, and the supporting portion is movable relative to the main body portion.

4. The developing cartridge according to claim 1, wherein: The chip rack is located on the first side of the housing in the first direction, and the chip rack is located on the fourth side of the housing in the second direction.

5. The developing cartridge according to claim 1, wherein The housing further includes a protective cover, the protective cover being configured to cover at least a portion of the input gear; The chip frame includes a supporting portion, and the supporting portion and the protective cover are integrally formed.

6. The developing cartridge according to claim 5, wherein: The chip holder further comprises a main body portion for supporting the chip and the electrical contact surface; The main body and the support part are connected by screws.

7. The developing cartridge according to claim 1, wherein: The chip rack is provided with a force-bearing surface at the top in the third direction, and the force-bearing surface can receive the force outside the developing box to drive the chip rack to move between the first position and the second position.

8. The developing cartridge according to claim 7, wherein: The force-bearing surface is formed by extending in the first direction, and is configured as an inclined surface intersecting the second direction and the third direction.

9. The developing cartridge according to claim 1, wherein: Also comprising a cover, located on the first side of the housing in the first direction, with a chip rack accommodating portion formed between the cover and the housing; At least a portion of the chip rack is located inside the chip rack accommodating portion.

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