Powder barrel with powder leakage prevention piston powder discharging structure

Abstract

The utility model provides a powder cylinder with a powder leakage prevention piston powder discharging structure, which comprises a powder cylinder body, a screw sealing structure is arranged at one end of the powder cylinder body, and the screw sealing structure comprises a sealing part and a piston screw assembly. The sealing component is sequentially composed of an outer sealing layer, a first double-faced adhesive tape layer, an inner sealing layer and a second double-faced adhesive tape layer from outside to inside, the sealing component is pasted in the end of the piston screw assembly through the second double-faced adhesive tape layer, and the outer sealing layer, the first double-faced adhesive tape layer, the inner sealing layer and the second double-faced adhesive tape layer are all of an annular structure. The inner diameter of the first double-sided adhesive layer is larger than that of the inner sealing layer, the outer diameter of the second double-sided adhesive layer is equal to that of the inner sealing layer, the inner diameter of the outer sealing layer is equal to that of the inner sealing layer, the inner diameter of the first double-sided adhesive layer is larger than that of the outer sealing layer, and the circular ring width of the first double-sided adhesive layer is equal to half of that of the outer sealing layer. The utility model relates to the technical field of copying.

Description

Technical Field

[0001] The utility model relates to the technical field of copying, in particular to a powder cartridge with a powder leakage-proof piston powder discharging structure. Background Art

[0002] Existing powder cartridge designs have several shortcomings, particularly evident in certain models. For example, in the screw seal of the Ricoh 2503 powder cartridge, the inner and outer diameters of the outer sealing layer, first double-sided adhesive layer, inner sealing layer, and second double-sided adhesive layer are all equal. This design simplifies the production process in theory, but it raises a series of practical issues.

[0003] When the piston rod of a piston-screw assembly frequently moves against the cap seal, slight deviations in the seal ring during the bonding process can cause the inner diameter portion of the second and first double-sided adhesive layers to gradually adhere to the surface of the sliding head that mates with the piston rod. As the piston rod continues to move, these attachments are carried by the sliding head to the sliding portion of the screw frame, causing further carbon powder contamination.

[0004] This carbon powder contamination not only affects the normal operation of the powder barrel and reduces the efficiency of the equipment, but also increases the maintenance cost of the equipment and brings inconvenience to users. In summary, the existing screw sealing structure has obvious defects in preventing carbon powder leakage, especially in terms of performance stability after long-term use, which needs to be improved.

[0005] Therefore, it is imperative to redesign a powder cylinder with a powder-leaking-proof piston powder-discharging structure. Utility Model Content

[0006] In view of the above-mentioned defects of the prior art, the present invention provides a powder cartridge with a powder leakage-proof piston powder discharge structure, aiming to solve the problem of carbon powder contamination during piston movement caused by unreasonable design of sealing components in the prior art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a powder cartridge with a powder leakage-proof piston powder discharging structure, comprising a powder cartridge body, a screw sealing structure being provided at one end of the powder cartridge body, the screw sealing structure comprising a sealing component and a piston screw assembly, the sealing component being composed of an outer sealing layer, a first double-sided adhesive layer, an inner sealing layer and a second double-sided adhesive layer from the outside to the inside, the sealing component being adhered to the end head of the piston screw assembly through the second double-sided adhesive layer, the outer sealing layer, the first double-sided adhesive layer, the inner sealing layer and the second double-sided adhesive layer being all annular structures and having the same outer diameter, the inner diameter of the second double-sided adhesive layer being larger than the inner diameter of the inner sealing layer, the inner diameter of the outer sealing layer being equal to the inner diameter of the inner sealing layer, the inner diameter of the first double-sided adhesive layer being larger than the inner diameter of the outer sealing layer, and the circular width of the first double-sided adhesive layer being equal to half the circular width of the outer sealing layer.

[0008] Based on the above, the beneficial effect of a powder cartridge with a powder leakage-proof piston powder discharge structure is to solve the problem of carbon powder contamination during piston movement caused by unreasonable sealing component design in the prior art. This is mainly reflected in: the utility model adopts a new sealing structure, namely, the inner diameter of the second double-sided rubber layer is larger than the inner diameter of the inner sealing layer. In this way, when the piston rod moves, direct contact between the rubber layer and the sliding head is avoided, thereby reducing the generation of attachments and eliminating the risk of carbon powder contamination.

[0009] The beneficial effect of the screw sealing structure is that through the multi-layer sealing design, it can effectively prevent the piston screw assembly from leaking carbon powder from the installation position of the screw sealing structure when it is driven by a copier, thereby improving the overall sealing performance; the beneficial effect of the outer sealing layer is to adapt to the tiny displacement in the piston movement and reduce the wear of the piston screw assembly during operation; the beneficial effect of the first double-sided adhesive layer is to provide the bonding function of the middle layer, ensure the stable combination of the outer sealing layer and the inner sealing layer, and prevent delamination; the beneficial effect of the inner sealing layer is to block the penetration of carbon powder and enhance the sealing performance; the beneficial effect of the second double-sided adhesive layer is to fix the sealing component in the end head of the piston screw assembly.

[0010] Furthermore, the piston screw assembly includes a screw frame, a piston rod and a return spring, the screw frame consists of a frame end and a frame frame, the frame frame includes a sliding part and a limiting part, the piston rod consists of a sliding head and a connecting rod, the sealing component is arranged in the frame end, the sliding head is slidably connected to the sliding part, and when the sliding head is not subject to external force, it adapts and closely contacts the center hole of the sealing component, the limiting part limits the sliding head in the sliding part, the connecting rod is slidably connected to the limiting part, and the return spring is sleeved on the connecting rod and connected between the sliding head and the inner side of the end of the limiting part.

[0011] Based on the above, the beneficial effect of the screw frame is to install the piston rod; the beneficial effect of the piston rod is to realize powder output control through piston movement to ensure uniform powder supply; the beneficial effect of the reset spring is to provide restoring force to automatically reset the piston rod to ensure consistent powder output each time; the beneficial effect of the frame end is to install sealing components; the beneficial effect of the frame frame is to provide guiding and limiting functions for the piston rod to ensure smooth piston movement; the beneficial effect of the sliding part is to guide the displacement direction of the sliding head; the beneficial effect of the limiting part is to limit the maximum stroke of the piston rod.

[0012] Furthermore, the thickness of the outer sealing layer is greater than that of the inner sealing layer. The outer sealing layer is a soft polyester fiber layer with a relatively low density, and the inner sealing layer is a dense polyester fiber layer with a relatively high density.

[0013] Based on the above, the dense inner sealing layer can better block carbon powder particles and prevent them from passing through the sealing components; while the soft outer sealing layer can adapt to a certain extent to the slight position changes caused by the movement of the piston screw assembly and maintain a good contact sealing state.

[0014] Furthermore, a release film is adhered to the outside of the second double-sided adhesive layer to prevent the second double-sided adhesive layer from being contaminated before adhesion.

[0015] Furthermore, a snap-fit ​​structure is provided on the outer surface of the end of the frame, and the snap-fit ​​structure includes at least one protrusion for snapping and connecting with the groove inside the powder adding port of the powder cartridge body.

[0016] In order to more clearly illustrate the above features of the present invention and the objectives to be achieved, the present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 : This is a schematic diagram of the screw seal structure of the present invention without piston action;

[0019] Figure 3 : A schematic diagram of the piston action of the screw seal structure of the present invention;

[0020] Figure 4 : It is a cross-sectional schematic diagram of the sealing component installed at the end of the frame of the utility model;

[0021] Figure 5 : It is a schematic diagram of the sealing component of the utility model before pasting.

[0022] Explanation of the accompanying numbers: 1-powder cartridge body, 2-screw sealing structure, 21-sealing component, 211-outer sealing layer, 212-first double-sided adhesive layer, 213-inner sealing layer, 214-second double-sided adhesive layer, 215-release film, 22-piston screw assembly, 221-screw frame, 2211-frame end, 2212-frame frame, 2212a-sliding part, 2212b-limiting part, 222-piston rod, 2221-sliding head, 2222-connecting rod, 223-return spring. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 5 As shown, a powder cartridge with a powder leakage-proof piston powder discharge structure includes a powder cartridge body 1, one end of the powder cartridge body 1 is provided with a screw sealing structure 2, the screw sealing structure 2 includes a sealing component 21 and a piston screw assembly 22, the sealing component 21 is composed of an outer sealing layer 211, a first double-sided adhesive layer 212, an inner sealing layer 213 and a second double-sided adhesive layer 214 from the outside to the inside, the sealing component 21 is adhered to the end of the piston screw assembly 22 through the second double-sided adhesive layer 214, The outer sealing layer 211, the first double-sided adhesive layer 212, the inner sealing layer 213 and the second double-sided adhesive layer 214 are all annular structures and have the same outer diameters. The inner diameter of the second double-sided adhesive layer 214 is larger than the inner diameter of the inner sealing layer 213. The inner diameters of the outer sealing layer 211 and the inner sealing layer 213 are equal. The inner diameter of the first double-sided adhesive layer 212 is larger than the inner diameter of the outer sealing layer 211, and the circular width of the first double-sided adhesive layer 212 is equal to half the circular width of the outer sealing layer 211.

[0024] The piston screw assembly 22 includes a screw frame 221, a piston rod 222 and a return spring 223. The screw frame 221 is composed of a frame end 2211 and a frame frame 2212. The frame frame 2212 includes a sliding portion 2212a and a limiting portion 2212b. The piston rod 222 is composed of a sliding head 2221 and a connecting rod 2222. The sealing component 21 is configured in the frame end 2211. The sliding head 2221 is slidably connected to the sliding head. Part 2212a, and when the sliding head 2221 is not subject to external force, it adapts to and closely contacts the middle hole of the sealing component 21, the limiting part 2212b limits the sliding head 2221 in the sliding part 2212a, the connecting rod 2222 is slidably connected to the limiting part 2212b, and the return spring 223 is sleeved on the connecting rod 2222 and connected between the sliding head 2221 and the inner side of the end of the limiting part 2212b.

[0025] The thickness of the outer sealing layer 211 is greater than that of the inner sealing layer 213 . The outer sealing layer 211 is a soft polyester fiber layer with a relatively low density, while the inner sealing layer 213 is a dense polyester fiber layer with a relatively high density.

[0026] A release film 215 is adhered to the outside of the second double-sided adhesive layer 214 to prevent the second double-sided adhesive layer 214 from being contaminated before adhesion.

[0027] A snap-fit ​​structure is provided on the outer surface of the frame end 2211 , and the snap-fit ​​structure includes at least one protrusion for snapping and connecting with the groove inside the powder adding port of the powder cartridge body 1 .

[0028] In summary, the specific implementation methods of the present invention are as follows:

[0029] The Ricoh 2503 powder cartridge controls the output of carbon powder through the screw sealing structure 2, and uses the multi-layer sealing design of the sealing component 21 in the screw sealing structure 2 to prevent carbon powder leakage. Specifically, the sealing component 21 is composed of an outer sealing layer 211, a first double-sided adhesive layer 212, an inner sealing layer 213 and a second double-sided adhesive layer 214; the outer sealing layer 211 is a soft polyester fiber layer with a low density and a certain elasticity. It can adapt to the slight displacement in the piston movement and reduce the wear of the piston screw assembly during operation. Its thickness is greater than that of the inner sealing layer 213, which can absorb a large amount of foreign impurities, thereby preventing foreign impurities from entering the powder cartridge and contaminating the carbon powder; the first double-sided adhesive layer 212 provides the bonding function of the intermediate layer to ensure the stable combination of the outer sealing layer 211 and the inner sealing layer 213 to prevent stratification. Its inner diameter is greater than the inner diameter of the outer sealing layer 211, and the circular The ring width is equal to half the circular ring width of the outer sealing layer 211, which ensures that the inner diameter portion of the first double-sided adhesive layer 212 will not touch the surface of the sliding head 2221 on the piston rod that cooperates with the hole 6 in the sealing component 21 during use, avoiding the possibility of carbon powder contamination; the inner sealing layer 213 is a dense polyester fiber layer with a higher density, which can block the carbon powder particles on the inside of the powder cylinder and prevent them from reaching the outside through the sealing component 21; the inner diameter of the second double-sided adhesive layer 214 is larger than the inner diameter of the inner sealing layer 213, which is used to prevent its inner diameter portion from touching the surface of the sliding head 2221 on the piston rod 222 that cooperates with the hole 6 in the sealing component 21 during use. In order to prevent contamination before pasting, a layer of release film 21 is also pasted on the outside of the second double-sided adhesive layer 214, which is torn off before installation to protect the viscosity of the second double-sided adhesive layer 214.

[0030] When the piston screw assembly 22 is in a stationary state, the sliding head 2221 is in close contact with the middle hole of the sealing component 21. At this time, the sealing state between the sealing component 21 and the sliding head 2221 is good to prevent toner leakage. When the external driving device (such as the motor of the copier) is started, the piston rod 222 is driven, and the sliding head 2221 begins to slide along the sliding part 2212a, pushing the connecting rod 2222 to move forward or backward. In this process, the elastic properties of the outer sealing layer 211 allow a slight displacement of the piston rod 222 without destroying the sealing. When the driving signal stops, the return spring 223 provides a restoring force to return the sliding head 2221 and the entire piston rod 222 to the initial position. At this time, the sliding head 2221 is in close contact with the middle hole of the sealing component 21 again, and the sealing state is restored. This copying process will be repeated continuously, and the uniform output of toner is guaranteed by precisely controlling the movement of the piston rod 222.

[0031] The above description is only the optimal solution embodiment of the present invention and is not intended to limit the present invention. Various modifications or replacements of the present invention made by those skilled in the art without departing from the essence and protection scope of the present invention should also be within the protection scope of the present invention.

Claims

1. A powder cartridge with a powder-leakage-proof piston powder-discharging structure, comprising a powder cartridge body (1), characterized in that: A screw sealing structure (2) is provided at one end of the powder cartridge body (1), and the screw sealing structure (2) includes a sealing component (21) and a piston screw assembly (22). The sealing component (21) is composed of an outer sealing layer (211), a first double-sided adhesive layer (212), an inner sealing layer (213) and a second double-sided adhesive layer (214) from the outside to the inside. The sealing component (21) is adhered to the end of the piston screw assembly (22) through the second double-sided adhesive layer (214). The double-sided adhesive layer (212), the inner sealing layer (213) and the second double-sided adhesive layer (214) are all annular structures and have the same outer diameters. The inner diameter of the second double-sided adhesive layer (214) is greater than the inner diameter of the inner sealing layer (213). The inner diameters of the outer sealing layer (211) and the inner sealing layer (213) are equal. The inner diameter of the first double-sided adhesive layer (212) is greater than the inner diameter of the outer sealing layer (211), and the annular width of the first double-sided adhesive layer (212) is equal to half the annular width of the outer sealing layer (211).

2. The powder cartridge with a powder leakage-proof piston powder discharging structure according to claim 1, characterized in that: The piston screw assembly (22) includes a screw frame (221), a piston rod (222) and a return spring (223). The screw frame (221) is composed of a frame end (2211) and a frame frame (2212). The frame frame (2212) includes a sliding portion (2212a) and a limiting portion (2212b). The piston rod (222) is composed of a sliding head (2221) and a connecting rod (2222). The sealing component (21) is arranged in the frame end (2211). The sliding head (2221) is slidably connected to the sealing component (21). The sliding portion (2212a), and when the sliding head (2221) is not subjected to external force, it adapts to and is in close contact with the center hole of the sealing component (21), the limiting portion (2212b) limits the sliding head (2221) in the sliding portion (2212a), the connecting rod (2222) is slidably connected to the limiting portion (2212b), and the return spring (223) is sleeved on the connecting rod (2222) and connected between the sliding head (2221) and the inner side of the end of the limiting portion (2212b).

3. The powder cartridge with a powder leakage-proof piston powder discharging structure according to claim 1, characterized in that: The thickness of the outer sealing layer (211) is greater than that of the inner sealing layer (213); the outer sealing layer (211) is a soft polyester fiber layer with a relatively low density, and the inner sealing layer (213) is a dense polyester fiber layer with a relatively high density.

4. The powder cartridge with a powder leakage-proof piston powder discharging structure according to claim 1, characterized in that: A release film (215) is adhered to the outside of the second double-sided adhesive layer (214) to prevent the second double-sided adhesive layer (214) from being contaminated before adhesion.

5. The powder cartridge with a powder leakage-proof piston powder discharging structure according to claim 2, characterized in that: A snap-fit ​​structure is provided on the outer surface of the frame end (2211), and the snap-fit ​​structure comprises at least one protrusion for snapping and connecting with a groove inside the powder adding port of the powder cartridge body (1).

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