A laser printer selenium drum developing roller buffer structure

Abstract

The utility model discloses a kind of laser printer selenium drum developing roller buffer structure, belong to printer accessory technical field, for lack of support limiting of developing roller rotating process and the problem that cannot be axially supported protection to developing roller, including selenium drum shell, developing roller body, mounting seat and motor, the both ends of developing roller body are fixedly connected with connecting rod, damping rubber seat is connected on the connecting rod through bearing, installation positioning mechanism is arranged on the upper portion of damping rubber seat, and abutting mechanism is arranged on selenium drum shell right end of developing roller body;The utility model is installed by the installation positioning mechanism set, when installing and using to developing roller body, the stability of limiting after developing roller body installation and use can be ensured, to guarantee the stability in the rotating process of developing roller body, to improve the reliability of developing roller body use, effectively avoid the printing quality problem generated due to unstable rotation.

Description

Technical Field

[0001] This utility model belongs to the technical field of printer accessories, specifically relating to a buffer structure for the developing roller of a laser printer drum. Background Technology

[0002] The toner cartridge is the core of a laser printer, containing 70% of the printing technology. The developing roller is a crucial component of the toner cartridge and one of the parts that has the greatest impact on image density. It is responsible for drawing toner from the toner cartridge and rubbing it against the toner to charge it. Only after the toner is charged can it be attracted by the photosensitive drum and finally transferred onto the paper.

[0003] A prior art patent, CN221125090U, describes a buffer structure for a printer toner cartridge developing roller. This patent features connecting rods fixedly connected to both sides of the developing roller body. These connecting rods pass through a through-hole, and each side of the connecting rod is connected to a first bearing. A shock-absorbing rubber seat is attached to the surface of each first bearing. A mounting bracket is fixedly connected to both sides of the toner cartridge housing. The mounting bracket has grooves on both sides, and the shock-absorbing rubber seat is located inside these grooves. An adjustment component is located on the top of each shock-absorbing rubber seat. The connecting rods at both ends of the developing roller are placed inside the toner cartridge through the through-hole. The shock-absorbing rubber seat buffers the developing roller as it rotates, and the adjustment component further buffers the roller's movement. The assembly secures the shock-absorbing rubber seat to the mounting bracket, thereby improving the connection precision between the shock-absorbing rubber seat and the connecting rod, preventing vibration and ensuring the connection point of the connecting rod remains undamaged, resulting in better printing quality. However, in practical use, the following shortcomings still exist: From a practical standpoint, while this patent provides buffer protection for the developing roller by limiting its movement, it lacks rotational limiting for the developing roller. This makes it impossible to provide stable support and limiting for the buffered developing roller, reducing its stability. Furthermore, it cannot provide axial support and protection for the developing roller during installation and use, further reducing its stability.

[0004] Therefore, a buffer structure for the developing roller of a laser printer drum is needed to solve the problems of lack of support and limit for the rotation process of the developing roller and inability to provide axial support and protection for the developing roller in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a buffer structure for the developing roller of a laser printer drum, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a buffer structure for the developing roller of a laser printer drum, comprising a drum housing, a developing roller body, a mounting base, and a motor. The mounting base is fixedly installed on the left side of the drum housing, and the motor is fixedly installed on the left side of the drum housing via the mounting base. Connecting rods are fixedly connected to both ends of the developing roller body, and the connecting rods are fixedly connected to the output shaft end of the motor. A shock-absorbing rubber seat is connected to the connecting rod via a bearing. The shock-absorbing rubber seat is installed inside the drum housing, and an installation positioning mechanism is provided on the upper part of the shock-absorbing rubber seat. A clamping mechanism is provided on the right end of the developing roller body on the drum housing.

[0007] It should be noted in the solution that the installation and positioning mechanism includes an installation groove, which is opened on the drum housing and set on the outer sides of both ends of the developing roller body. A lower positioning plate is slidably installed in the installation groove, and an upper positioning plate is slidably installed on the upper part of the lower positioning plate through the installation groove. The lower and upper positioning plates are located on the upper and lower sides of the developing roller body to lock and limit the connecting rod. Rubber strips are fixedly connected to the lower and upper positioning plates on the side away from each other. An installation plate is set on the upper part of the rubber strips. A clamping block is fixedly connected to the bottom of the installation plate. The clamping block is located on the upper part of the shock-absorbing rubber seat to limit the shock-absorbing rubber seat. Fixing bolts are fixedly connected to the four corners of the upper part of the installation plate. The installation plate is fixedly connected to the drum housing by the fixing bolts.

[0008] It is worth noting that the lower positioning plate and the upper positioning plate are slidably engaged with the toner cartridge housing via mounting grooves.

[0009] Furthermore, it should be noted that the clamping mechanism includes a movable groove, which is located at the right end of the developing roller body and opened inside the drum housing. A clamping plate is slidably disposed in the movable groove. A rotating seat is fixedly connected to the right surface of the clamping plate. A clamping screw is rotatably connected to the rotating seat. The clamping screw is threaded to the right side of the drum housing. A positioning rod is fixedly connected to the left side of the clamping plate.

[0010] In a preferred embodiment, four positioning rods are provided on the abutment plate. The four positioning rods are respectively located near the four corners of the abutment plate. Positioning holes are respectively opened in the pressing block and the movable groove at the alignment points of the four positioning rods, and the positioning rods are slidably disposed in the positioning holes.

[0011] Compared with the prior art, the laser printer toner cartridge developing roller buffer structure provided by this utility model has at least the following beneficial effects:

[0012] (1) By setting the installation and positioning mechanism, the stability of the limiting position of the developing roller body after installation and use can be ensured when the developing roller body is installed and used, thereby ensuring the stability of the developing roller body during rotation, thereby improving the reliability of the developing roller body and effectively avoiding printing quality problems caused by unstable rotation.

[0013] (2) When the clamping mechanism is used in conjunction with the installation positioning mechanism to limit the installation of the developing roller body, it can not only provide axial support and protection for the developing roller body according to the installation and use process, thereby further improving the stability of the developing roller body rotation, but also further strengthen the limiting process of the developing roller body in conjunction with the installation positioning mechanism, thereby improving the strength of the installation limiting. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0017] Figure 4 This is a schematic diagram of a partially disassembled structure of the present invention.

[0018] In the diagram: 1. Drum housing; 2. Developing roller body; 201. Connecting rod; 3. Mounting base; 4. Motor; 5. Mounting and positioning mechanism; 501. Mounting groove; 502. Lower positioning plate; 503. Upper positioning plate; 504. Rubber strip; 505. Mounting plate; 506. Pressing block; 507. Fixing bolt; 6. Clamping mechanism; 601. Movable groove; 602. Clamping plate; 603. Positioning rod; 604. Clamping screw; 605. Rotating seat; 606. Positioning hole; 7. Shock-absorbing rubber seat. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments.

[0020] Please see Figure 1-4This utility model provides a buffer structure for the developing roller of a laser printer drum, including a drum housing 1, a developing roller body 2, a mounting base 3, and a motor 4. The mounting base 3 is fixedly installed on the left side of the drum housing 1, and the motor 4 is fixedly installed on the left side of the drum housing 1 through the mounting base 3. Connecting rods 201 are fixedly connected to both ends of the developing roller body 2, and the connecting rods 201 are fixedly connected to the output shaft end of the motor 4. A shock-absorbing rubber seat 7 is connected to the connecting rod 201 through a bearing. The shock-absorbing rubber seat 7 is installed inside the drum housing 1, and an installation positioning mechanism 5 is provided on the upper part of the shock-absorbing rubber seat 7. A clamping mechanism 6 is provided on the right end of the developing roller body 2 on the drum housing 1.

[0021] Further as Figure 2 , Figure 3 and Figure 4 As shown, it is worth noting that the mounting and positioning mechanism 5 includes a mounting groove 501. The mounting groove 501 is opened on the drum housing 1 and is located on the outer sides of both ends of the developing roller body 2. A lower positioning plate 502 is slidably mounted in the mounting groove 501. An upper positioning plate 503 is slidably mounted on the upper part of the lower positioning plate 502 through the mounting groove 501. The lower positioning plate 502 and the upper positioning plate 503 are engaged and slidably mounted on the drum housing 1 through the mounting groove 501. The lower positioning plate 502 and the upper positioning plate 503 are located on the developing roller body 2. The upper and lower sides are used to lock and limit the connecting rod 201. Rubber strips 504 are fixedly connected to the lower positioning plate 502 and the upper positioning plate 503 on the side away from each other. An installation plate 505 is provided on the upper part of the rubber strip 504. A pressing block 506 is fixedly connected to the bottom of the installation plate 505. The pressing block 506 is used to limit the shock-absorbing rubber seat 7 on the upper part of the shock-absorbing rubber seat 7. Fixing bolts 507 are fixedly connected to the four corners of the upper part of the installation plate 505. The installation plate 505 is fixedly connected to the toner cartridge housing 1 by the fixing bolts 507.

[0022] In use, the lower positioning plate 502 and the upper positioning plate 503 are slidably installed in the mounting groove 501 to limit the rotation of the upper and lower parts of the connecting rod 201. This, together with the shock-absorbing rubber seat 7, enables stable rotation limiting of the developing roller body 2, improving rotational stability. At this time, the mounting plate 505 is threaded to the upper part of the drum housing 1 by the fixing bolt 507. The clamping block 506 can limit the shock-absorbing rubber seat 7. The setting of the lower positioning plate 502 and the upper positioning plate 503 can ensure the stability of the developing roller body 2. At the same time, the setting of the rubber strip 504 can provide buffer protection for the lower positioning plate 502 and the upper positioning plate 503, thereby improving their protection.

[0023] As can be seen from the above working process, the installation and positioning mechanism 5 ensures the stability of the limiting position of the developing roller body 2 after installation and use, thereby ensuring the stability of the developing roller body 2 during rotation, thus improving the reliability of the developing roller body 2 and effectively avoiding printing quality problems caused by unstable rotation.

[0024] Further as Figure 2 , Figure 3 and Figure 4 As shown, it is worth noting that the clamping mechanism 6 includes a movable groove 601, which is located at the right end of the developing roller body 2 and is opened inside the drum housing 1. A clamping plate 602 is slidably arranged in the movable groove 601. A rotating seat 605 is fixedly connected to the right surface of the clamping plate 602. A clamping screw 604 is rotatably connected to the rotating seat 605. The clamping screw 604 is threaded to the right side of the drum housing 1. A positioning rod 603 is fixedly connected to the left side of the clamping plate 602. Four positioning rods 603 are arranged on the clamping plate 602. The four positioning rods 603 are respectively located near the four corners of the clamping plate 602. The four positioning rods 603 are respectively provided with positioning holes 606 in the pressing block 506 and the movable groove 601 at their alignment points. The positioning rods 603 are slidably arranged in the positioning holes 606.

[0025] In use, by rotating the clamping screw 604, the clamping screw 604 pushes the clamping plate 602 to slide in the movable groove 601, thereby allowing the positioning rod 603 to slide into the positioning hole 606. The positioning rod 603 limits the stability of the clamping block 506 in limiting the shock-absorbing rubber seat 7. At the same time, the clamping plate 602 pushes the end of the developing roller body 2 to perform an axial clamping operation, thereby ensuring the stability of the developing roller body 2.

[0026] This solution has the following working process: When this device is in use, the developing roller body 2 is installed inside the drum housing 1 by connecting and installing the developing roller body 2 and the shock-absorbing rubber seat 7. The lower positioning plate 502 and the upper positioning plate 503 are slidably installed in the mounting groove 501, limiting the rotation of the upper and lower parts of the connecting rod 201. This, combined with the shock-absorbing rubber seat 7, allows for stable rotation limiting of the developing roller body 2, improving rotational stability. Then, the mounting plate 505 is threaded to the upper part of the drum housing 1 by the fixing bolt 507. The clamping block 506 limits the shock-absorbing rubber seat 7, which, in conjunction with the setting of the lower positioning plate 502 and the upper positioning plate 503... The stability of the developing roller body 2 can be ensured. At the same time, the rubber strip 504 provides buffer protection for the lower positioning plate 502 and the upper positioning plate 503, thereby improving its protective performance. After the upper and lower limit installation of the developing roller body 2 is completed, the clamping screw 604 is rotated to push the clamping plate 602 to slide in the movable groove 601, so that the positioning rod 603 slides into the positioning hole 606. The positioning rod 603 limits the stability of the clamping block 506 in limiting the shock-absorbing rubber seat 7. At the same time, the pushing of the clamping plate 602 can perform axial clamping operation on the end of the developing roller body 2, thereby ensuring the stability of the developing roller body 2.

[0027] In summary: the installation and positioning mechanism 5 ensures the stability of the developing roller body 2 during installation and use, thereby guaranteeing its stability during rotation and improving its reliability. This effectively avoids printing quality problems caused by unstable rotation. Furthermore, the clamping mechanism 6, in conjunction with the installation and positioning mechanism 5, not only provides axial support and protection for the developing roller body 2 during installation and use, further improving its rotational stability, but also strengthens the limiting process of the developing roller body 2, thus enhancing the strength of the installation and limiting mechanism.

Claims

1. A buffer structure for the developing roller of a laser printer drum, comprising a drum housing (1), a developing roller body (2), a mounting base (3), and a motor (4), wherein the mounting base (3) is fixedly mounted on the left side of the drum housing (1), and the motor (4) is fixedly mounted on the left side of the drum housing (1) via the mounting base (3), characterized in that: The developing roller body (2) is fixedly connected to both ends of a connecting rod (201). The connecting rod (201) is fixedly connected to the output shaft of the motor (4). A shock-absorbing rubber seat (7) is connected to the connecting rod (201) via a bearing. The shock-absorbing rubber seat (7) is installed inside the drum housing (1). An installation positioning mechanism (5) is provided on the upper part of the shock-absorbing rubber seat (7). A clamping mechanism (6) is provided on the right end of the developing roller body (2) on the drum housing (1).

2. The buffer structure for the developing roller of a laser printer drum according to claim 1, characterized in that: The mounting and positioning mechanism (5) includes a mounting groove (501), which is opened on the drum housing (1) and located on the outer sides of both ends of the developing roller body (2). A lower positioning plate (502) is slidably mounted in the mounting groove (501), and an upper positioning plate (503) is slidably mounted on the upper part of the lower positioning plate (502) through the mounting groove (501). The lower positioning plate (502) and the upper positioning plate (503) are located on the upper and lower sides of the developing roller body (2) to lock and limit the connecting rod (201). Rubber strips (504) are fixedly connected to the side away from the upper positioning plate (502) and the upper positioning plate (503). An mounting plate (505) is provided on the upper part of the rubber strip (504). A clamping block (506) is fixedly connected to the bottom of the mounting plate (505). The clamping block (506) is used to limit the vibration damping rubber seat (7) on the upper part. Fixing bolts (507) are fixedly connected to the four corners of the upper part of the mounting plate (505). The mounting plate (505) is fixedly connected to the toner cartridge housing (1) by the fixing bolts (507).

3. The buffer structure for the developing roller of a laser printer drum according to claim 2, characterized in that: The lower positioning plate (502) and the upper positioning plate (503) are slidably engaged on the drum housing (1) via the mounting groove (501).

4. The buffer structure for the developing roller of a laser printer drum according to claim 1, characterized in that: The clamping mechanism (6) includes a movable groove (601), which is located at the right end of the developing roller body (2) and opened inside the drum housing (1). A clamping plate (602) is slidably arranged inside the movable groove (601). A rotating seat (605) is fixedly connected to the right surface of the clamping plate (602). A clamping screw (604) is rotatably connected to the rotating seat (605). The clamping screw (604) is threadedly connected to the right side of the drum housing (1). A positioning rod (603) is fixedly connected to the left side of the clamping plate (602).

5. The buffer structure for the developing roller of a laser printer drum according to claim 4, characterized in that: Four positioning rods (603) are provided on the abutment plate (602). The four positioning rods (603) are respectively located near the four corners of the abutment plate (602). The four positioning rods (603) are respectively provided with positioning holes (606) in the pressing block (506) and the movable groove (601). The positioning rods (603) are slidably arranged in the positioning holes (606).

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