CN101694568B - Driving force transmission part of processing box - Google Patents

Abstract

The invention provides a driving force transmission part related to a process box, comprising a power transmission gear matched with the driving force receiving part, a support shaft and a buffer gear coaxially and flexibly connected with the transmission gear, the power transmission gear and the buffer gear are arranged Elastic body. Since the buffer gear coaxially and flexibly connected with the transmission gear is added, an elastic mechanism is arranged between the power transmission gear and the buffer gear. When the process box is not loaded into the machine, the driving force transmission part in the free state can directly drive the driving force receiving part in the process to rotate in a small range in two directions, the transmission direction or the opposite direction. The invention solves the technical problems of unstable transmission and easy reversal damage when the driving force transmission part of the existing process box is engaged with the driving force receiving part.

Description

A driving force transmission part of a process cartridge

technical field

The present invention relates to a driving force transmission member of an image forming apparatus, and more particularly, to a driving force transmission member for driving a process cartridge.

Background technique

As shown in Figure 1, 122 is the driving force receiving part of the process cartridge, that is, the driven gear, and 121 is the driving force transmission part for driving the process cartridge in the image forming device, that is, the driving gear, because the above-mentioned driving force transmission part 121 is only one Separate gears, so the following problems often occur in the image forming device (hereinafter referred to as the machine):

First, in existing machines, before the process box is not loaded into the machine, the state of the driven gear on the process box and the driving gear meshed with it on the machine is difficult to determine, that is, when the process box is installed in the machine, there will be It may happen that the teeth of the driven gear on the process box and the tooth tops of the driving gear meshed with it in the machine bear against each other, resulting in unsmooth installation. At this time, if it is pressed into the machine by force, it is easy to cause damage to the processing box or machine parts. If the tooth top of the gear is installed into the machine in a supported state, it will inevitably cause a huge vibration when the machine starts to run, and the gear may be damaged. The transmission is not stable enough, causing printing defects; and the directionality of such gears resisting and forcing the gears to rotate is uncertain;

Second, when the process box is loaded into the machine, the drive gear of the machine and the driven gear of the process box have already meshed. Therefore, the driving part of the whole machine is in a non-working state, and the driving part of the machine is difficult to be driven, so the force of rotation when the process box is installed at this time may cause the process box to reverse, and the process box reverse will make the process Some seals on the box or functional parts that cannot be reversed cause abnormalities, causing printing defects.

Contents of the invention

The present invention provides a driving force transmission part of a process box to solve the technical problem of unstable transmission and easily causing reverse damage when the driving force transmission part of the process box in the existing image forming device meshes with the driving force receiving part in the process box .

In order to solve the above technical problems, the technical scheme that the present invention takes is:

A driving force transmission part of a process box, comprising a power transmission gear and a supporting shaft matched with the driving force receiving part, characterized in that it also includes a buffer gear coaxially and flexibly connected with the transmission gear, and the power transmission gear An elastic mechanism is arranged between the buffer gear and the buffer gear.

One end of the elastic mechanism is arranged on the buffer gear, and the other end abuts against the power transmission gear.

The power transmission gear is provided with claws; the buffer gear is provided with a hollow shaft, and a bayonet matching with the claws is provided around the hollow shaft, and the claws on the power transmission gear pass through Through the buffer gear and snap-fit with the bayonet along the hollow shaft of the gear.

The elastic mechanism is a spring or a rubber elastic body.

The buffer gear is also provided with a positioning post, and the power transmission gear is provided with a stopper. One end of the spring or rubber elastic body is fixedly connected to the positioning post, and the other end abuts against the stopper.

The elastic mechanism is a shrapnel, the buffer gear is provided with a groove, one end of the shrapnel is fixed on the end wall of the buffer gear, and the other end extends into the groove of the buffer gear.

The elastic mechanism is a shrapnel, the power transmission gear is provided with a protruding column, the buffer gear is provided with a groove, one end of the shrapnel is fixed on the end wall of the buffer gear, and the other end extends into the buffer gear. In the groove of the gear, the protruding column is inserted into the groove.

After adopting the above technical solution, since the buffer gear coaxially and flexibly connected with the transmission gear is added, an elastic mechanism is arranged between the power transmission gear and the buffer gear. When the process box is not loaded into the machine, the driving force transmission part in the free state can directly drive the drive force receiving part in the process box to rotate in a small range in two directions, the transmission direction or the opposite direction. If the gear of the driving force receiving part is against the teeth of the power transmission gear of the processing box in the machine, then when the gear is resisted, no matter which direction it tends to rotate, it will be realized by the driving force transmitting part instead of It will cause the process box to rotate, so that the driving force transmission part and the driving force receiving part will reach the meshing state; in this way, it will not happen that it is difficult to install or damage the gear due to the top of the tooth; when the installation is normal, the motor will make the driving force transmission part When running at a certain angle, the driving force transmission part changes from the state of free rotation on both sides to the state of one-way small-range rotation, thereby driving the process box to run smoothly. The invention solves the technical problem of unstable transmission and easy reversal damage when the driving force transmission part of the process box in the existing image forming device meshes with the driving force receiving part on the process box.

Description of drawings

Fig. 1 is a schematic diagram of the cooperation of the driving force receiving part and the driving force transmitting part of the process cartridge in the prior art.

Figure 2 is a schematic diagram of the process cartridge of this patent.

Fig. 3 is a schematic view showing the cooperation of the driving force receiving part in the process cartridge and the driving force transmitting part of the process cartridge in the first embodiment.

Fig. 4 is a schematic diagram of a driving force transmission part of the process cartridge of the first embodiment.

Fig. 5 is a schematic structural diagram of the power transmission gear of the first embodiment.

Fig. 6 is a schematic diagram of cooperation between the buffer gear and the elastic mechanism in the first embodiment.

Fig. 7 is a schematic structural diagram of the buffer gear of the first embodiment.

Fig. 8 is a schematic diagram of the buffer gear of the second embodiment.

Fig. 9 is a schematic structural diagram of the second embodiment of the shrapnel.

Fig. 10 is a schematic structural diagram of the power transmission gear of the second embodiment.

Detailed ways

first embodiment

As shown in Figures 2 to 7, the driving force transmission part 2 of the process box in the image forming device includes a power transmission gear 3, a buffer gear 4 coaxially and flexibly connected with the power transmission gear 3, and the power transmission gear 3 and the buffer gear 4 pass through The support shaft 9 is supported on a gear carrier plate 10 within the machine. When the power transmission gear 3 and the buffer gear 4 are combined, the claw 11 stretched out on the power transmission gear 3 passes through the opening 13 distributed around the hollow shaft 12 of the buffer gear 4, and the claw 11 hooks the wall of the gear 4 14, so that the power transmission gear 3 and the buffer gear 4 will not disengage. There is an elastic mechanism 5 between the power transmission gear 3 and the buffer gear 4, which can be a spring or a rubber elastic body. On the block 8 of the gear 3.

When the process box 1 was not loaded into the machine, the driving force transmission part 2 in the free state directly drove the driving force receiving part 6 in the process box 1 to rotate in a small range in the gear transmission direction or in the opposite direction. At this time, if the gear of the driving force receiving part 6 is in contact with the power transmission gear 3 in the machine, then when the gear is resisted, no matter which direction there is a tendency to rotate, it is realized by the driving force transmission part 2 Rotate without causing the process box 1 to rotate, so that the driving force transmission part 2 and the driving force receiving part 6 reach the meshing state; in this way, it will not occur that it is difficult to install the machine or damage the gear due to the top of the tooth; when the machine is installed normally , the motor makes the driving force transmission part 2 rotate at a certain angle, and the driving force transmission part 2 becomes a one-way small-range rotation state from the free rotation state on both sides, thereby driving the process box 1 to run smoothly.

When the process box 1 was packed into the machine, because the driving force receiving part 6 of the process box 1 arrived at the installation position earlier, and the driving force transmission part 2 of the process box 1 in the machine and the driving force receiving part 6 on the process box 1 were in engagement state, If the process box 1 has the action of rotating around the process box 1 driving force receiving part 6 in the process of loading, although the machine motor is in the non-working state at this moment, the driving part of the whole machine is also in the non-working state, but due to the processing in the machine The driving force transmission part 2 of the box 1 is in a free state that can rotate in a small range at the initial stage, so it will not cause the process box 1 to reverse due to the inability to drive the entire driving part of the machine, and there will be no damage due to the reversal. resulting defects.

Second embodiment:

As shown in Fig. 8, Fig. 9 and Fig. 10, the driving force transmission part of the process box 1 in the image forming apparatus includes a power transmission gear 30, a buffer gear 40 coaxially and flexibly connected with the power transmission gear 30, the power transmission gear 30 and the buffer gear 40 It is supported by a support shaft 9 on a gear carrier plate 10 inside the machine. The elastic mechanism in the driving force transmission part is a shrapnel 50 , one end of the shrapnel 50 is fixed on an end wall 51 of the buffer gear 40 , and the other end extends into the groove 52 . The connection between the power transmission gear 30 and the buffer gear 40 may be in the manner of the aforementioned claw 11 or in the manner of a protruding column.

As shown in FIG. 10 , the part extending into the buffer gear 40 on the power transmission gear 30 is a protruding column 53 . When the power transmission gear 30 is combined with the buffer gear 40 , the protrusion 53 of the power transmission gear 30 is inserted into the groove 52 of the buffer gear 40 , and the shrapnel 50 is freely pressed against the protrusion 53 .

When the process box 1 was not loaded into the machine, the shrapnel 50 was in a free state, so that there was a certain gap in both directions between the protruding column 53 of the power transmission gear 30 and the corresponding groove 52 of the buffer gear 40 to move; When the box 1 is loaded into the machine, if there is a certain angle of rotation around the driving force receiving element 6 in any direction during the loading process of the top teeth or the process box 1, then the driving force transmission part of the process box can realize a small angle of rotation, thereby The driving force receiving part of the process cartridge 1 and other driving parts in the machine will not be affected.

After the process box 1 is installed in place, when starting to work, the buffer gear 40 in the machine runs, but the power transmission gear 30 does not move. When turning a certain angle, the positioning column 53 on the power transmission gear 30 compresses the shrapnel 50 on the After the buffer gear 40 is on, it will drive the power transmission gear 30 to move, thereby driving the driving force receiving part 6 on the process box to rotate.

Claims (3)

1. the driving force transmission part of a handle box, described handle box is used in the image processing system, described driving force transmission part comprise with handle box in power transmission gear and the back shaft of driven gear engagement coupling, it is characterized in that, also comprise the buffer gear cold that is connected with described transmission gear coaxial, flexible, described back shaft is supporting buffer gear cold and power transmission gear, be provided with elastic mechanism between described power transmission gear and the described buffer gear cold, described elastic mechanism one end is arranged on the buffer gear cold, the other end and described power transmission gear butt, described power transmission gear is provided with claw; Described buffer gear cold is provided with tubular shaft, be provided with the bayonet socket that is complementary with described claw around the described tubular shaft, claw on the described power transmission gear passes described buffer gear cold along tubular shaft and the bayonet socket clamping of gear, when handle box is not packed image processing system into, the driving force transmission part that is in free state directly drives driven gear in the handle box, power transmission gear is rotated to gear drive direction or opposite direction both direction among a small circle around back shaft, and described elastic mechanism is spring, rubber elastomer or shell fragment.

2. the driving force transmission part of handle box as claimed in claim 1, it is characterized in that, also be provided with reference column on the described buffer gear cold, described power transmission gear is provided with block, described spring or rubber elastomer one end are fixedlyed connected with reference column, the other end and described block butt.

3. the driving force transmission part of handle box as claimed in claim 1 is characterized in that, described buffer gear cold is provided with groove, and described shell fragment one end is fixed on the end wall of described buffer gear cold, and the other end stretches in the groove of described buffer gear cold.

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