Doctor blade for laser printer

Abstract

The utility model discloses a doctor blade for a laser printer, which relates to the technical field of doctor blades and comprises a support component, a blade is detachably mounted in the support component, and a plurality of fixing bolts are mounted in the support component in a threaded manner. According to the doctor blade for the laser printer, the fixing cylinder is separated from the interior of the fixing sleeve, the blade is pulled out of the limiting groove and taken out for replacement, replacement is convenient and fast, the situation that the blade is extruded by a bolt, the pressure shared by a certain position of the blade is too large, and consequently the blade deforms is avoided, meanwhile, installation is more stable and firmer, and the service life of the doctor blade is prolonged. The flattening firmness degree of the blade is improved through the metal lining plate on the left side of the cutter body, the fixing sleeve is installed in the installation frame, the situation that a fixing bolt directly acts on the interior of the cutter body is avoided, the cutter body is not prone to bending, the service life of the blade is prolonged, the fixing sleeve is limited through the fixing barrel, the blade is prevented from falling off from the support assembly, and the cutter is convenient to use. And the dismounting convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a powder outletting knife technical field, more specifically, the utility model relates to a powder outletting knife for laser printer. BACKGROUND

[0002] The powder outletting knife is an important component in the selenium drum of the laser printer, mainly responsible for controlling the thickness of the carbon powder layer on the magnetic roller, and making the carbon powder frictionally charged through the friction with the sleeve of the magnetic roller, and its performance directly affects the quality of the printed product, such as light color, black point, black line or uneven blackness, which may be related to the aging or deformation of the powder outletting knife.

[0003] The powder outletting knife is usually composed of a holder and a blade, but the existing powder outletting knife is usually directly welded on the support, which makes it difficult to replace the powder outletting knife when it is damaged, thereby increasing the difficulty of replacing the powder outletting knife. Although the powder outletting knife can be fixed by bolts to facilitate replacement, the powder outletting knife is soft in material, and is prone to bending during the locking process of the bolts, affecting the quality of the printed product. SUMMARY

[0004] The main purpose of the utility model is to provide a powder outletting knife for laser printer, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A powder outletting knife for laser printer, comprising a support assembly, the inside of the support assembly is detachably installed with a blade, and a plurality of fixing bolts are installed in the inside of the support assembly in screw thread;

[0007] The support assembly comprises a mounting bracket, both ends of the left side of the mounting bracket are fixedly connected with mounting blocks, a limiting groove is formed in the top of the mounting bracket, a limiting assembly is movably installed at the bottom of the mounting bracket, a locking device is movably installed at the top of the mounting bracket, sliding grooves are formed on both sides of the left end of the mounting bracket, an activity groove is formed in the bottom of the mounting bracket, a plurality of sleeve holes are formed in the inside of the activity groove, and an activity cavity is formed in the inside of the left side of the mounting bracket.

[0008] Preferably, the locking device comprises a top block, sliding blocks are fixedly installed at both ends of the left side of the top block, activity springs are fixedly installed at the bottom of the sliding blocks, and a rubber pad is fixedly installed at the bottom of the top block.

[0009] Preferably, the left side of the mounting frame is internally provided with cavities, the sliding block is movably sleeved in the cavity of the left side of the mounting frame, the sliding block is slidably installed in the sliding groove, the movable spring is located between the cavity in the mounting frame and the sliding block, and the top block and the rubber pad are internally threadedly connected with the fixing bolt.

[0010] Preferably, the limiting assembly comprises a limiting strip movably installed in the movable groove, a plurality of fixing barrels fixedly installed at the top of the limiting strip, a connecting block fixedly installed at the left side of the limiting strip, a pressing block fixedly installed at the top of the connecting block, reset springs fixedly installed at the both ends of the bottom of the pressing block, and the pressing block movably installed in the movable cavity.

[0011] Preferably, the blade comprises a blade body, a fixing sleeve fixedly installed at the left side of the outer surface of the blade body, a metal lining plate fixedly installed at the left side in the blade body, the fixing sleeve being embeddedly installed in the limiting groove, the fixing sleeve and the metal lining plate being movably sleeved on the outer surface of the fixing barrel, and the fixing bolt being threadedly installed in the fixing barrel through the locking device.

[0012] Compared with the prior art, the utility model has the advantages of the following:

[0013] 1. By rotating the fixing bolt and pressing the top of the pressing block, the reset spring is compressed, the limiting strip is lowered in the movable groove, the fixing barrel is separated from the inside of the fixing sleeve, the blade is pulled out of the limiting groove, and the blade is taken out for replacement, so that the replacement is convenient.

[0014] 2. The rubber pad is used for supporting the fixing sleeve, the rubber pad is pressed on the surface of the fixing sleeve, the area of the fixing sleeve is increased compared with being directly locked by the bolt, the pressure is reduced, the deformation of the blade caused by the excessive pressure of the bolt is avoided, and the installation is more stable and firm.

[0015] 3. The metal lining plate at the left side of the blade body improves the flatness and firmness of the blade, the fixing sleeve is installed in the mounting frame, the fixing bolt is not directly applied to the inside of the blade body, the blade body is not easy to bend, and the service life of the blade is prolonged.

[0016] 4. By rotating the fixing bolt, the fixing bolt is separated from the inside of the fixing barrel, the movable spring pushes the sliding block to rise in the sliding groove through the reaction force, the top block drives the rubber pad to rise, the fixing barrel still limits the fixing sleeve, the blade is prevented from falling from the support assembly, and the convenience of disassembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic view of the utility model;

[0018] Figure 2 It is the support assembly exploded structure schematic view of the utility model;

[0019] Figure 3 It is the mounting frame structure schematic view of the utility model;

[0020] Figure 4 It is the locking device structure schematic view of the utility model;

[0021] Figure 5 It is the limiting assembly structure schematic view of the utility model;

[0022] Figure 6 It is the blade structure schematic view of the utility model.

[0023] The figure mark is: 1, support assembly;2, blade;3, fixed bolt;11, mounting frame;12, limiting assembly;13, locking device;14, limiting groove;15, mounting block;16, movable slot;17, sliding slot;18, movable cavity;19, sleeve hole;121, limiting strip;122, fixed cylinder;123, connecting block;124, pressing block;125, return spring;131, top block;132, rubber pad;133, sliding block;134, movable spring;21, blade body;22, fixed sleeve;23, metal inner lining plate. DETAILED DESCRIPTION

[0024] In order to make the technical problem, technical scheme and advantage that the utility model is going to solve more clearly, the following will be described in detail in conjunction with the drawings and specific embodiment.

[0025] As shown in the accompanying Figure 1 To the accompanying Figure 5 The embodiment of the utility model provides a kind of powder outlet blade for laser printer, including support assembly 1, blade 2 and fixed bolt 3, blade 2 detachably installs in the inside of support assembly 1, blade 2 is fixedly installed in the inside of support assembly 1 by fixed bolt 3;

[0026] As shown in the accompanying Figure 2 - Figure 3 Support assembly 1 includes mounting frame 11, and the both ends of the left side of mounting frame 11 are fixedly connected with mounting block 15, limiting groove 14 is arranged in the top of mounting frame 11, limiting assembly 12 is movably installed in the bottom of mounting frame 11, locking device 13 is movably installed in the top of mounting frame 11, sliding slot 17 is arranged in the both sides of the left end of mounting frame 11, movable slot 16 is arranged in the bottom of mounting frame 11, a plurality of sleeve holes 19 are arranged in the inside of movable slot 16, movable cavity 18 is arranged in the inside of the left side of mounting frame 11.

[0027] By limiting groove 14, the fixed sleeve 22 is limited, which is convenient for fixing the blade 2 and avoids the offset of the blade 2 during installation, thereby affecting the installation accuracy of the blade 2.

[0028] As shown in Figure 4 The locking device 13 includes a top block 131 and a rubber pad 132. The two ends of the left side of the top block 131 are fixedly installed with sliding blocks 133. The bottom of the sliding block 133 is fixedly installed with an active spring 134. The rubber pad 132 is fixedly installed at the bottom of the top block 131. The rubber pad 132 is pressed on the surface of the fixed sleeve 22. Compared with direct locking by bolts, the area of extrusion of the fixed sleeve 22 is increased, the pressure during bolt fixing is reduced, the pressure borne by the blade 2 at a certain position is avoided to be too large, and the deformation of the blade 2 is avoided.

[0029] The two ends of the left side of the inside of the mounting bracket 11 are provided with cavities. The sliding block 133 is movably sleeved in the cavity on the left side of the mounting bracket 11. The sliding block 133 is slidably installed in the sliding groove 17. The active spring 134 is located between the cavity in the mounting bracket 11 and the sliding block 133. The inside of the top block 131 and the rubber pad 132 is threadedly connected with the fixed bolt 3.

[0030] The limiting assembly 12 includes a limiting strip 121 movably installed in the active groove 16. The top of the limiting strip 121 is fixedly installed with a plurality of fixed cylinders 122. The plurality of fixed cylinders 122 are movably sleeved in the plurality of sleeve holes 19. The left side of the limiting strip 121 is fixedly installed with a connecting block 123. The top of the connecting block 123 is fixedly installed with a pressing block 124. The two ends of the bottom of the pressing block 124 are fixedly installed with return springs 125. The pressing block 124 is movably installed in the active cavity 18. The return springs 125 are located between the bottom of the pressing block 124 and the active cavity 18.

[0031] The fixed cylinder 122 limits the blade 2, which is convenient for the installation of the blade 2. At the same time, the fixed cylinder 122 rises under the action of the fixed bolt 3 when the locking device 13 descends, so that the rubber pad 132 descends, and the rubber pad 132 and the mounting bracket 11 lock and fix the blade 2.

[0032] As shown in Figure 6 The blade 2 includes a blade body 21. The outer surface of the left side of the blade body 21 is fixedly installed with a fixed sleeve 22. The left side of the inside of the blade body 21 is fixedly installed with a metal lining plate 23. The fixed sleeve 22 is embeddedly installed in the limiting groove 14. The fixed sleeve 22 and the metal lining plate 23 are movably sleeved on the outer surface of the fixed cylinder 122. The fixed bolt 3 is threadedly installed in the inside of the fixed cylinder 122 through the locking device 13.

[0033] Through the fixed sleeve 22, the blade 2 is installed in the inside of the mounting frame 11, through the metal lining plate 23 on the left side of the cutter body 21, the flat and firm degree of the blade 2 is improved, and through the fixed sleeve 22, the blade 2 is installed in the inside of the mounting frame 11, the fixed bolt 3 is avoided from directly acting on the inside of the cutter body 21, the cutter body 21 is not easy to bend, and the service life of the blade 2 is prolonged.

[0034] The working process of the utility model is as follows:

[0035] When the blade 2 needs to be replaced, the fixed bolt 3 is rotated to be separated from the inside of the fixed cylinder 122, at this time, the movable spring 134 pushes the sliding block 133 to ascend in the inside of the sliding groove 17 through reaction force, the top block 131 drives the rubber pad 132 to ascend, at this time, the fixed cylinder 122 still limits the fixed sleeve 22, the blade 2 is avoided from falling off from the support assembly 1, then, the top of the pressing block 124 is pressed, the reset spring 125 is compressed, the limiting strip 121 descends in the inside of the movable groove 16, the fixed cylinder 122 is separated from the inside of the fixed sleeve 22, the blade 2 is taken out from the limiting groove 14, and the blade 2 is taken out to be replaced;

[0036] When installing, the pressing block 124 is pressed first, the reset spring 125 is compressed, the pressing block 124 pushes the limiting strip 121 to descend in the inside of the movable groove 16 through the connecting block 123, the fixed cylinder 122 descends to the inside of the sleeve hole 19, at this time, the new blade 2 is inserted in the inside of the limiting groove 14, the pressing block 124 is stopped, the fixed cylinder 122 ascends in the inside of the fixed sleeve 22 through the reaction of the reset spring 125, at this time, the fixed bolt 3 is screwed in the inside of the fixed cylinder 122, the fixed bolt 3 is rotated, the locking device 13 descends, the movable spring 134 is compressed, and the rubber pad 132 presses the blade 2 in the inside of the mounting frame 11 to be locked.

[0037] Finally, it should be pointed out that: the utility model discloses the embodiment of the drawings, only involves the structure involved in the embodiment of the disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0038] The above only for the preferred embodiment of the utility model has been described, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A powder delivery blade for a laser printer comprising a carrier assembly (1) characterised in that: The inside of the support assembly (1) is detachably mounted with a blade (2), and the inside of the support assembly (1) is threadedly mounted with a plurality of fixing bolts (3); The support assembly (1) comprises a mounting rack (11), both ends of the left side of the mounting rack (11) are fixedly connected with mounting blocks (15), a limiting groove (14) is formed in the top of the mounting rack (11), a limiting assembly (12) is movably mounted at the bottom of the mounting rack (11), a locking device (13) is movably mounted at the top of the mounting rack (11), sliding grooves (17) are formed on both sides of the left end of the mounting rack (11), an activity groove (16) is formed in the bottom of the mounting rack (11), a plurality of sleeve holes (19) are formed in the inside of the activity groove (16), and an activity cavity (18) is formed in the inside of the left side of the mounting rack (11).

2. The powder delivery blade for a laser printer according to claim 1, wherein: The locking device (13) comprises a top block (131), both ends of the left side of the top block (131) are fixedly mounted with sliding blocks (133), the bottom of each sliding block (133) is fixedly mounted with an activity spring (134), and the bottom of the top block (131) is fixedly mounted with a rubber pad (132).

3. The powder delivery blade for a laser printer according to claim 2, wherein: Both ends of the inside of the left side of the mounting rack (11) are provided with cavities, the sliding blocks (133) are movably sleeved in the cavities of the left side of the mounting rack (11), the sliding blocks (133) are slidably mounted in the sliding grooves (17), the activity springs (134) are located between the cavities in the mounting rack (11) and the sliding blocks (133), and the inside of the top block (131) and the rubber pad (132) are threadedly connected with the fixing bolts (3).

4. The powder delivery blade of claim 1, wherein: The limiting assembly (12) comprises a limiting strip (121), the limiting strip (121) is movably mounted in the inside of the activity groove (16), a plurality of fixing barrels (122) are fixedly mounted at the top of the limiting strip (121), the fixing barrels (122) are movably sleeved in the sleeve holes (19), respectively, a connecting block (123) is fixedly mounted at the left side of the limiting strip (121), a pressing block (124) is fixedly mounted at the top of the connecting block (123), reset springs (125) are fixedly mounted at both ends of the bottom of the pressing block (124), the pressing block (124) is movably mounted in the inside of the activity cavity (18), and the reset springs (125) are located between the bottom of the pressing block (124) and the activity cavity (18).

5. The powder delivery blade for a laser printer according to claim 4, wherein: The blade (2) comprises a blade body (21), a fixed sleeve (22) is fixedly mounted on the outer surface of the left side of the blade body (21), a metal lining plate (23) is fixedly mounted on the left side of the inside of the blade body (21), the fixed sleeve (22) is embeddedly mounted in the inside of the limiting groove (14), the fixed sleeve (22) and the metal lining plate (23) are movably sleeved on the outer surface of the fixing barrel (122), and the fixing bolts (3) are threadedly mounted in the inside of the fixing barrel (122) through the locking device (13).

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