A powder box

Abstract

The present invention discloses a powder box, comprising a cleaning component and a developing component, the cleaning component comprising a cleaning unit and a first shell arranged on the cleaning unit, the first shell being provided with a first top block; the developing component comprising a developing unit movably connected to the first shell and a second top block connected to the developing unit, the second top block being able to move backward and drive the developing unit to move backward from position one to position two relative to the first shell; when the developing unit is in position one, the first top block and the second top block are adjacent; when the developing unit moves from position one to position two, the first top block is able to move; the application of the above powder box can effectively improve the service life of the entire powder box while ensuring that the movement of the second top block is not hindered.

Description

Technical Field

[0001] The invention relates to the field of printing consumables, in particular to a powder box. Background Art

[0002] Laser printers modulate binary dot matrix information sent by the interface circuit onto a laser beam, and then scan it onto a photosensitive body. The photosensitive body and the camera mechanism form an electronic photographic transfer system, which transfers the image projected onto the photosensitive drum onto the printing paper. In current printers, in order to prevent the developer roller and the photosensitive drum from being in contact for a long time, leaving marks on the photosensitive drum and affecting the image quality, it is necessary to use a driving mechanism to separate the developer roller and the photosensitive drum during the non-imaging period.

[0003] In some brands of laser printers, the driving mechanism generally includes a hook block that can be pressed down and moved back and forth. There is a top block on the powder bin part of the powder cartridge. During the installation process of the powder cartridge, the top block can press down the hook block. During the operation of the printer, the hook block can move forward and hook the top block, and then drive the top block to move backward, so that the powder bin rotates relative to the waste powder bin, so that the developing roller and the photosensitive drum are separated; during the whole process, the top block not only needs to withstand the friction with the hook block, but also needs to withstand the force of driving the powder bin part to rotate, so the top block is easy to break, making the entire powder cartridge unusable. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a powder box, which can effectively increase the service life of the entire powder box while ensuring that the movement of the second top block is not hindered.

[0005] The powder box of the present invention comprises a cleaning component and a developing component, the cleaning component comprises a cleaning unit and a first shell arranged on the cleaning unit, the first shell is provided with a first top block; the developing component comprises a developing unit movably connected to the first shell and a second top block connected to the developing unit, the second top block can move backward and drive the developing unit to move backward from position one to position two relative to the first shell; when the developing unit is in position one, the first top block and the second top block are adjacent; when the developing unit moves from position one to position two, the first top block can move.

[0006] Using the above-mentioned powder box, during the installation process of the powder box, the developing assembly is located at position one, at which time the first top block and the second top block are adjacent, and the first top block can press down the spacing component to make the spacing component move downward; during use, the printer controls the spacing component to move forward to the front side of the second top block, and then the spacing component pops out and hooks the second top block, and then the spacing component drives the second top block to move backward, driving the entire developing assembly to move from position one to position two relative to the cleaning assembly; during the entire use and installation process, the friction with the spacing component is borne by the first top block, and the force driving the powder bin to rotate relative to the waste powder bin is borne by the second top block, which effectively reduces the load borne by a single top block, reduces the possibility of top block breakage, and increases the service life of the entire powder box; on the other hand, when the second top block drives the developing unit to move backward, the first top block can move and avoid the path of the second top block, so that the second top block will not be hindered by the first top block and cannot drive the developing unit to move backward, ensuring that the second top block is not hindered and can smoothly drive the developing unit to move backward.

[0007] The powder box of another aspect of the present invention can be detachably installed in an imaging device having a spacing component, and includes a cleaning assembly and a developing assembly, the cleaning assembly includes a cleaning unit and a first shell arranged at the left end of the cleaning unit, the first shell is provided with a first top block, the first top block is used to press down the spacing component; the developing assembly includes a developing unit rotatably connected to the first shell and a second top block connected to the developing unit, the second top block can move backward under the drive of the spacing component, and drive the developing unit to move from position one to position two relative to the first shell.

[0008] When using the above-mentioned powder box, during the installation process of the powder box, the first top block can press down the spacer component, so that the spacer component moves downward. During use, the printer controls the spacer component to move forward to the front side of the second top block, and then the spacer component pops out and hooks the second top block. Then the spacer component drives the second top block to move backward, driving the entire developing assembly to rotate relative to the cleaning assembly; during the entire use and installation process, the friction with the spacer component is borne by the first top block, and the force driving the powder bin to rotate relative to the waste powder bin is borne by the second top block, which effectively reduces the load borne by a single top block, reduces the possibility of top block breakage, and increases the service life of the entire powder box.

[0009] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0011] Figure 1It is an isometric view of the left side of the powder box in an embodiment of the present invention;

[0012] Figure 2 It is a left view of the left part of the powder box in the embodiment of the present invention;

[0013] Figure 3 A bottom view of the left side of the powder box in an embodiment of the present invention;

[0014] Figure 4 It is a front view of the left side of the powder box in the embodiment of the present invention;

[0015] Figure 5 for Figure 4 Enlarged view of the middle V;

[0016] Figure 6 is a top view of a powder box according to an embodiment of the present invention;

[0017] Figure 7 for Figure 6 Sectional view along AA direction;

[0018] The above drawings contain the following reference numerals.

[0019]

[0020] DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0025] refer to Figures 1 to 7 ,refer to Figures 1 to 7 The powder box of this embodiment includes a cleaning assembly 100 and a developing assembly 200; the cleaning assembly 100 includes a cleaning unit 140 and a first shell 110 arranged at the left end of the cleaning unit 140, and a first top block 120 is arranged on the first shell 110. The developing assembly 200 includes a developing unit 230 rotatably connected to the first shell 110 and a second top block 211 connected to the developing unit 230, and the second top block 211 can drive the developing unit 230 to move backward from position one to position two relative to the cleaning unit 140; the powder box can be detachably installed in an imaging device having a spacing component.

[0026] Specifically, in order to improve the service life of the entire powder box, the powder box of this embodiment includes a cleaning assembly 100 and a developing assembly 200; the cleaning assembly 100 includes a cleaning unit 140 and a first shell 110 arranged at the left end of the cleaning unit 140, and a first top block 120 is arranged on the first shell 110, and the first top block 120 is used to press down the spacing component; the developing assembly 200 includes a developing unit 230 rotatably connected to the first shell 110 and a second top block 211 connected to the developing unit 230, and the second top block 211 can move backward under the drive of the spacing component and drive the developing unit 230 to move from position one to position two relative to the first shell 110.

[0027] When the above-mentioned powder box is used, during the installation process of the powder box, the first top block 120 can press down the spacer component, so that the spacer component moves downward. During use, the printer controls the spacer component to move forward to the front side of the second top block 211, and then the spacer component pops out and hooks the second top block 211. Then the spacer component drives the second top block 211 to move backward, driving the entire developing assembly 200 to rotate relative to the cleaning assembly 100; during the entire use and installation process, the friction with the spacer component is borne by the first top block 120, and the force driving the powder bin to rotate relative to the waste powder bin is borne by the second top block 211, which effectively reduces the load borne by a single top block, reduces the possibility of top block breakage, and improves the service life of the entire powder box.

[0028] Among them, in order to improve the life of the powder box while avoiding the first top block 120 from hindering the movement of the second top block 211 and ensuring the smooth movement of the second top block 211, the powder box of another aspect of the present invention includes a cleaning assembly 100 and a developing assembly 200, the cleaning assembly 100 includes a cleaning unit 140 and a first shell 110 arranged on the cleaning unit 140, and the first shell 110 is provided with a first top block 120; the developing assembly 200 includes a developing unit 230 movably connected to the first shell 110 and a second top block 211 connected to the developing unit 230, the second top block 211 can move backward and drive the developing unit 230 to move backward from position one to position two relative to the first shell 110; when the developing unit 230 is in position one, the first top block 120 and the second top block 211 are adjacent; when the developing unit 230 moves from position one to position two, the first top block 120 can move.

[0029] When the above powder box is used, during the installation process of the powder box, the developing assembly 200 is located in position one, at which time the first top block 120 and the second top block 211 are adjacent, and the first top block 120 can press down the spacing component, so that the spacing component moves downward; during use, the printer controls the spacing component to move forward to the front side of the second top block 211, and then the spacing component pops up and hooks the second top block 211, and then the spacing component drives the second top block 211 to move backward, driving the entire developing assembly 200 relative to the cleaning assembly 100 from position one to position two; during the entire use and installation process, the friction with the spacing component is controlled by the first top block. The first top block 120 bears the force of driving the powder bin to rotate relative to the waste powder bin, and the second top block 211 bears the force of driving the powder bin to rotate relative to the waste powder bin, which effectively reduces the load borne by a single top block, reduces the possibility of top block breakage, and increases the service life of the entire powder box; on the other hand, when the second top block 211 drives the developing unit 230 to move backward, the first top block 120 can move and avoid the path of the second top block 211, so that the second top block 211 will not be hindered by the first top block 120 and cannot drive the developing unit 230 to move backward, ensuring that the second top block 211 is not hindered and can smoothly drive the developing unit 230 to move backward.

[0030] Specifically, after the powder box is installed in the printer, the entire cleaning component 100 is stationary relative to the printer, while the developing component 200 can rotate from position one to position two relative to the cleaning component 100. The developing component 200 also includes a developing roller 150 arranged on the developing unit 230, and the cleaning component 100 also includes a photosensitive drum 250 arranged on the cleaning unit 140. When the second top block 211 does not move backward, the developing unit 230 is located at position one, and the developing roller 150 abuts against the photosensitive drum 250; and when the second top block 211 moves backward, the entire developing unit 230 rotates to position two relative to the cleaning component 100, and the developing roller 150 is separated from the photosensitive drum 250; of course, the developing component 200 can also be slidably connected to the first shell 110 to realize the movable function of the developing unit 230.

[0031] In order to make the first top block 120 avoid the movement path of the second top block 211, the first top block 120 is located outside the second top block 211; Figure 4 As shown, in the actual product, the first top block 120 and the second top block 211 are integrally located on the left side of the entire powder box, so the first top block 120 is located on the left side of the second top block 211; Figure 4 The state shown is a state where the first top block 120 and the second top block 211 are adjacent to each other when the developing unit 230 is located at position one.

[0032] It should be noted that, in the present embodiment, the spacer component is not a part of the powder box itself, but a component of the laser printer. The laser printer controls the separation or contact between the photosensitive drum 250 and the developing roller 150 by controlling the movement of the spacer component.

[0033] In this embodiment, the developing unit 230 includes a powder bin filled with toner for printing; and the cleaning unit 140 includes a waste powder bin for collecting waste powder generated during the printing process. The specific structure of the entire powder box and the matching relationship between the powder box and the laser printer including the spacing component can be referred to in the Chinese invention patent application with publication number CN104583879A; the role of the spacing component in this embodiment is equivalent to the role of the spacing component of the Chinese invention patent application with publication number CN104583879A No. 61; on the other hand, the up, down, left, right, etc. directions referred to in this embodiment all refer to the following. Figures 2 to 4 The relative orientation of the toner cartridges shown is not the orientation of the printer unit.

[0034] like Figures 1 to 4 The first top block 120 and the second top block 211 are two independent separate components, which are respectively arranged at different positions and have different functions.

[0035] exist Figure 7In the state of the powder box shown in FIG. 1 , the photosensitive drum 250 and the developing roller 150 are in contact. After the powder box is installed on the printer, the second top block 211 moves backward to drive the photosensitive drum 250 and the developing roller 150 to separate. That is, when the second top block 211 is in the Figure 3 When the second top block 211 is in the position shown, the photosensitive drum 250 and the developing roller 150 are in contact, and when the second top block 211 moves backward to the maximum position, the photosensitive drum 250 and the developing roller 150 are in a separated state.

[0036] like Figure 4 , Figure 5 As shown, in order to ensure that during the installation process of the powder box, the first top block 120 presses down the spacing component and the second top block 211 does not contact the spacing component during the pressing process, the lower end surface of the second top block 211 is higher than the lower end surface of the first top block 120, that is, the height of the lower end of the second top block 211 from the spacing component is greater than the height of the lower end surface of the first top block 120 from the spacing component; during the pressing process, the lower end surface of the first top block 120 will first contact the spacing component and press the spacing component downward; preferably, the lower end surface of the first top block 120 is 1 mm higher than the lower end surface of the second top block 211.

[0037] like Figure 3 As shown, since the spacing component must be able to be pressed down by the first top block 120 and be able to hook onto the second top block 211 during the backward movement to drive the second top block 211 to move backward, the width of the first top block 120 needs to be larger than the widths of the first top block 120 and the second top block 211; if the first top block 120 and the first shell 110 are completely fixed, when the spacing component moves backward in front of the two top blocks, it will be abutted by the first top block 120 and cannot drive the second top block 211 to move backward, so it is necessary to set an avoidance mechanism on the powder box, wherein the avoidance mechanism is suitable for the first top block 120 to move under the drive of the spacing component, so that the avoidance mechanism is suitable for The first top block 120 avoids the movement path of the second top block 211. When the spacing component drives the second top block 211 to move backward, the first top block 120 will not block the spacing component and the second top block 211 from moving backward. The avoidance mechanism should be understood in a broad sense, that is, it can be achieved that during the process of the second top block 211 moving backward, the first top block 120 will not hinder the second top block 211 from moving backward. Whether the first top block 120 moves together with the second top block 211 or the first top block 120 avoids laterally, when the spacing component drives the second top block 211 to move backward, the first top block 120 can move and avoid the movement path of the spacing component.

[0038] Among them, the avoidance mechanism can achieve the above functions in a variety of ways. Figures 1 to 4 Shown is one of the preferred methods, specifically as follows Figure 3As shown, the avoidance mechanism includes a first limiting slide groove 111 arranged on the first shell body 110, and the first limiting slide groove 111 extends along the front-to-back direction. The first top block 120 slides in cooperation with the first limiting slide groove 111, and the first top block 120 can move backward. At this time, the first top block 120 and the second top block 211 can move backward together driven by the spacing component. At this time, the second top block 211 drives the developing roller 150 to separate from the photosensitive drum 250, and the first top block 120 slides backward in the first limiting slide groove 111; it should be noted that the forward, backward and other directions restricted in this embodiment are not strictly limited to the front and rear directions. For example, the extension direction of the first limiting slide groove 111 only needs to be roughly along the front-to-back direction, and the movement direction of the first top block 120 and the second top block 211 can also be roughly along the front-to-back direction, without moving along the front or rear.

[0039] like Figure 3 As shown, the avoidance mechanism also includes a first return spring 130, which is connected to the first housing 110 and the first top block 120. The first return spring 130 can provide a forward force for the first top block 120 to push the first top block 120 back to its initial position, that is, the position of the first top block 120 when the developing assembly 200 is in position 1; when the first top block 120 and the second top block 211 lose the backward force from the spacing component, the first return spring 130 can push the first top block 120 forward so that the first top block 120 can return to its initial position. Figure 3 The position shown enables the first top block 120 to resume the function of pressing down the spacer member.

[0040] like Figure 6 As shown, a second return spring 240 is also provided between the photosensitive component and the cleaning component 100. When the second top block 211 loses the backward force from the spacing component, the second return spring 240 can drive the photosensitive component to rotate in the opposite direction relative to the cleaning component 100, so that the second top block 211 returns to the position as shown in FIG. Figure 3 Initial position shown.

[0041] On the other hand, the avoidance mechanism can also realize its function in an elastic avoidance manner. Here, the first top block 120 itself is elastic. When the spacing component drives the second top block 211 to move backward, the first top block 120 can produce elastic deformation to the left; when the spacing component pushes the second top block 211 to move from front to back, the spacing component can squeeze the first top block 120, so that it can produce elastic deformation to the left and leave the position that blocks the movement of the second top block 211.

[0042] In the third aspect, the following also provides an implementation of an avoidance mechanism, wherein the avoidance mechanism includes a second limiting slide groove provided on the first shell 110, the second limiting slide groove extending in the left-right direction, the first top block 120 slidingly cooperates with the second limiting slide groove, and when the second top block 211 moves backward under the drive of the spacing component, the first top block 120 can move to the left along the second limiting slide groove; when the spacing component drives the second top block 211 to move backward from front to back, the spacing component can squeeze the first top block 120, so that the first top block 120 moves to the left to a position that does not block the movement of the second top block 211; specifically, the first top block 120 can be moved to the left to a position that does not block the movement of the second top block 211. An inclined surface is provided on the block 120. When the spacing component moves backward, the spacing component can abut against the inclined surface, providing the first top block 120 with a force to move leftward along the second limiting slide groove; here, the avoidance mechanism also includes a second return spring 240, which connects the first shell 110 and the first top block 120, and the second return spring 240 can provide the first top block 120 with a force to the right; when the first top block 120 and the second top block 211 lose the backward force from the spacing component, the first top block 120 can move rightward along the second limiting slide groove under the action of the second return spring 240, and return to the position as shown in the figure. Figure 3 Initial position shown.

[0043] like Figure 1 As shown, a first positioning hole 112 is opened on the first shell body 110, and the first positioning hole 112 is used to install a first transmission member that drives the photosensitive drum 250 to rotate, and the first positioning hole 112 and the photosensitive drum 250 are coaxial; and a second transmission member 220 is also provided on the first shell body 110, and the second transmission member 220 is used to transmit torque to the developing roller 150, so as to drive the developing roller 150 to rotate.

[0044] Specifically, a rotating bracket 210 is rotatably connected to the right side of the first shell 110, and the second top block 211 is fixedly arranged on the rotating bracket 210. The rotating connection shaft of the rotating bracket 210 and the first shell 110 is coaxial with the second transmission member 220; a gear set is arranged on the rotating bracket 210, and the torque is transmitted from the second transmission member 220 to the developing roller 150 through the gear set; when the second top block 211 moves backward, the axial position of the rotating bracket 210 remains unchanged, and the rotating bracket 210 drives the gear set and the developing roller 150 to rotate together, so that the developing roller 150 is disengaged from the photosensitive drum 250; this facilitates the arrangement of the positions of the second transmission member 220 and the driving device.

[0045] The following is for Figures 1 to 7 The most preferred structure of the powder box shown is used to specifically describe the operating status of the spacing component and the powder box during the installation and operation of the powder box.

[0046] When the powder box is installed in the main component, the movable part is located in the non-imaging position, the first top block 120 descends and presses down the spacing part, and the spacing part is compressed and retracted into the movable part, thereby ensuring that the powder box can be completely installed in the main component. At this time, the position where the spacing part is compressed and retracted into the movable part is called the third position, and the developing unit 230 is at position one.

[0047] When the movable component moves to the imaging position, the movable component drives the spacing component to move to the front side of the first top block 120 and the second top block 211. Since the spacing component loses the pressure of the first top block 120, the spacing component can pop up, so that it can hook the first top block 120 and the second top block 211. The position of the spacing component at this time is defined as the second position. At this time, the second top block 211 is not affected by the spacing component and moves backward, and the photosensitive drum 250 and the developing roller 150 still maintain a contact state; that is, when the spacing component moves to the second position, the developing unit 230 maintains the position in which the photosensitive drum 250 is in contact with the developing roller 150 under the action of the second return spring 240, and the developing unit 230 is located at position one.

[0048] When the movable component drives the spacing component to move to the non-imaging position, the movable component drives the spacing component to move backward, driving the first top block 120 and the second top block 211 to move backward together. At this time, the second top block 211 and the entire developing assembly 200 including the developing roller 150 rotate together, so that the developing roller 150 is separated from the photosensitive drum 250. At this time, the spacing component is in the first position and the developing unit 230 is in the second position.

[0049] The following table shows the relationship between different positions of the spacing member, different positions of the moving member for driving the spacing member to move back and forth, and the contact state between the developing roller 150 and the photosensitive drum 250.

[0050]

[0051] In particular, when imaging is required, when the second top block 211 loses the force of the spacer component pushing it backward, the second return spring 240 can drive the second top block 211 back to the initial position, and the first return spring 130 can drive the first top block 120 back to the initial position; so that the developing roller 150 and the photosensitive drum 250 can be separated in time and smoothly after the imaging is completed.

[0052] It can be understood that in the description of the above operating states and positions, the definitions of imaging positions, non-imaging positions, etc. and the specific structures of moving parts and spacing parts, etc. can also refer to the Chinese invention patent application with publication number CN104583879A.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A powder box, which can be detachably installed in an imaging device having a spacing member, characterized in that: include: A cleaning assembly (100), the cleaning assembly (100) comprising a cleaning unit (140) and a first shell (110) arranged on the cleaning unit (140), wherein a first top block (120) is arranged on the first shell (110); A developing assembly (200), comprising a developing unit (230) movably connected to the first housing (110) and a second top block (211) connected to the developing unit (230); the second top block (211) is capable of moving backwards and drives the developing unit (230) to move backwards from position one to position two relative to the first housing (110); the lower end surface of the second top block (211) is higher than the lower end surface of the first top block (120); the first top block (120) and the second top block (211) are separately arranged; and the width of the spacing component needs to be greater than the width of both the first top block (120) and the second top block (211); When the developing unit (230) is in position one, the first top block (120) and the second top block (211) are adjacent to each other; When the developing unit (230) moves from position one to position two, the first top block (120) is able to move; The avoidance mechanism comprises: A first limiting slide groove (111) is arranged on the first shell (110), the first limiting slide groove (111) extends in the front-rear direction, the first top block (120) is slidably matched with the first limiting slide groove (111), and the first top block (120) can move backward; A first return spring (130), wherein the first return spring (130) connects the first housing (110) and the first top block (120), and the first return spring (130) can provide a force for the first top block (120) to return forward to an initial position; A second limiting slide groove is arranged on the first shell (110), and the second limiting slide groove extends in the left-right direction. The first top block (120) is slidably matched with the second limiting slide groove. When the second top block (211) moves backward, the first top block (120) can move leftward along the second limiting slide groove.

2. The powder box according to claim 1, characterized in that: The first top block (120) is elastic, and when the second top block (211) moves backward, the first top block (120) can generate elastic deformation to the left.

3. The powder box according to claim 1, characterized in that: The first top block (120) is capable of moving leftward.

4. The powder box according to claim 3, characterized in that: The avoidance mechanism comprises a second limiting slide groove arranged on the first shell (110), the second limiting slide groove extends in the left-right direction, the first top block (120) is slidably matched with the second limiting slide groove, and when the second top block (211) moves backward, the first top block (120) can move leftward along the second limiting slide groove.

5. The powder box according to claim 4, characterized in that: The avoidance mechanism further comprises a third return spring, wherein the third return spring connects the first housing (110) and the first top block (120), and the third return spring can provide a rightward force for the first top block (120).

6. A powder box, characterized in that: The powder box can be detachably mounted in an imaging device having a spacing member, and the powder box includes: A cleaning assembly (100), the cleaning assembly (100) comprising a cleaning unit (140) and a first shell (110) arranged on the cleaning unit (140), the first shell (110) being provided with a first top block (120), the first top block (120) being used to press down the spacing component; A developing assembly (200), comprising a developing unit (230) movably connected to the first housing (110) and a second top block (211) connected to the developing unit (230); the second top block (211) can move backwards driven by the spacing component and drive the developing unit (230) to move from position one to position two relative to the first housing (110); the distance between the lower end surface of the second top block (211) and the spacing component is greater than the distance between the lower end surface of the first top block (120) and the spacing component; the first top block (120) and the second top block (211) are separately arranged; An avoidance mechanism, when the spacing component drives the second top block (211) to move backward, the avoidance mechanism is suitable for the first top block (120) to avoid the movement path of the spacing component, and the avoidance mechanism comprises: A first limiting slide groove (111) is arranged on the first shell (110), the first limiting slide groove (111) extends in the front-rear direction, the first top block (120) is slidably matched with the first limiting slide groove (111), and the first top block (120) can move backwards under the drive of the spacing component; A first return spring (130), wherein the first return spring (130) connects the first housing (110) and the first top block (120), and the first return spring (130) can provide a forward force for the first top block (120); A second limiting slide groove is arranged on the first shell (110), and the second limiting slide groove extends in the left-right direction. The first top block (120) is slidably matched with the second limiting slide groove. When the second top block (211) moves backward under the drive of the spacing component, the first top block (120) can move leftward along the second limiting slide groove.

7. The powder box according to claim 6, characterized in that: When the spacing component drives the second top block (211) to move backward, the first top block (120) can avoid the movement path of the spacing component.

8. According to the powder box of claim 6, the first top block (120) can move driven by the spacing component.

9. The powder box according to claim 6, characterized in that: The first top block (120) is elastic, and when the second top block (211) moves backward, the first top block (120) can generate elastic deformation to the left.

10. The powder box according to claim 6, characterized in that: The first top block (120) is capable of moving leftward.

11. The powder box according to claim 10, characterized in that: The avoidance mechanism further comprises a third return spring, wherein the third return spring connects the first housing (110) and the first top block (120), and the third return spring can provide a rightward force for the first top block (120).

Images