A pencil case that prevents ink stains
By employing a double-layered oil-resistant layer and a lining layer in the pencil case, the problem of the pencil case lining easily getting dirty is solved, achieving the effects of preventing ink scratches and being easy to clean, thus improving the convenience of using the pencil case.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELI GROUP CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-30
AI Technical Summary
The knitted fabric lining of existing pencil cases is easily smudged and soiled by pencils, ballpoint pens, and fountain pens, and is not easy to clean.
It adopts a double-layer oil-proof layer and inner fabric layer structure. The outer fabric layer and the oil-proof layer are connected by edging and zipper. The lining consists of two layers of oil-proof layer and inner fabric layer connected together. The oil-proof layer uses aluminum film material to ensure that pencil marks are difficult to leave and ink is easy to wipe off.
It achieves flexible adaptability of the pencil case to its internal contents and external space, while preventing ink stains, keeping the inside of the pencil case clean, and improving the user experience.
Smart Images

Figure CN224420322U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of stationery storage, and more specifically to a pencil case that prevents ink stains. Background Technology
[0002] Pencil cases are made of soft material, allowing them to deform to accommodate the quantity and size of items inside, as well as the size of the storage space inside a backpack. They are convenient and practical to carry, and their adaptability to internal and external space is more flexible than that of pencil boxes. Therefore, they are widely used to store various pens and other stationery. In current technology, the lining of pencil cases is usually made of knitted fabrics such as 210D. However, knitted fabrics are easily smudged and soiled by pencils, ballpoint pens, and fountain pens, and are not easy to clean. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a pencil case that is resistant to ink stains, which can flexibly adapt to the internal contents and external space, and can prevent pencils, ballpoint pens and fountain pens from scratching and soiling the inside of the pencil case.
[0004] The technical solution of this utility model is to provide a pencil case that prevents ink stains, including a bag body and a zipper. The bag body includes two front and back bag surfaces on the outside and at least one lining on the inside, with the lining connected to the bag surfaces. The bag surfaces include an outer fabric layer and an oil-proof layer, with the oil-proof layer stacked and connected to the inside of the outer fabric layer. The zipper is connected to the edge where the outer fabric layer and the oil-proof layer meet. The lining includes two oil-proof layers and an inner fabric layer located between the two oil-proof layers, with the two oil-proof layers and the inner fabric layer stacked and connected. An edge binding is provided at the edge where the two oil-proof layers and the inner fabric layer meet. A restraining strap is provided on the lining for keeping the pen in place.
[0005] Compared with the prior art, the ink-resistant pencil case of this utility model has the following advantages: the bag surface is composed of an outer fabric layer and an oil-resistant layer, and the lining is composed of two oil-resistant layers and an inner fabric layer located between the two oil-resistant layers. The outer fabric layer and the inner fabric layer are flexible, allowing the pencil case to adapt flexibly to the internal contents and the external space. The oil-resistant layer is hydrophobic and oleophobic, making it difficult for pencils to leave scratches. Even if ink from ballpoint pens and fountain pens remains on the oil-resistant layer, it is easy to wipe clean, thus preventing the inside of the pencil case from being stained by ink.
[0006] The zipper is attached to the edge where the outer fabric layer and the oil-proof layer meet. This prevents the edge of the outer fabric layer and the oil-proof layer from being exposed and causing an unpleasant appearance. It also prevents the edge of the outer fabric layer and the oil-proof layer from being torn and separating. Similarly, the edges where the two oil-proof layers and the inner fabric layer meet are bound. This prevents the edges of the two oil-proof layers and the inner fabric layer from being exposed and causing an unpleasant appearance. It also prevents the edges of the two oil-proof layers and the inner fabric layer from being torn and separating.
[0007] Preferably, the oil-resistant layer is bonded to the outer fabric layer by adhesive, sewing, or heat pressing. This structure simplifies the layering and bonding of the oil-resistant layer to the outer fabric layer.
[0008] Preferably, a binding is provided at the edge where the outer fabric layer and the oil-proof layer meet. The binding is sewn to the bag surface, and the zipper is sewn onto the binding. With this structure, the binding locks the edge where the outer fabric layer and the oil-proof layer meet, preventing the edge from being exposed and causing an unsightly appearance. It also prevents the oil-proof layer from being torn at the edge, causing the outer fabric layer and the oil-proof layer to separate. It also facilitates the zipper sewing connection. In addition, if there is a seam on the oil-proof layer, it will be easy for the oil-proof layer to tear at the seam. The binding can protect the oil-proof layer.
[0009] Preferably, at least one inner side of the bag surface is provided with a mesh pocket, which is sewn to the bag surface, and the sewn joint is bound with an edge. With this structure, the edge binding locks the sewn joint between the mesh pocket and the bag surface, preventing the sewn joint from being exposed and causing an unsightly appearance, and also preventing the oil-proof layer from tearing at the sewn joint with the mesh pocket, thus protecting the oil-proof layer.
[0010] Preferably, the two oil-resistant layers and the lining layer are bonded together, sewn together, or heat-pressed together. Using this structure, the two oil-resistant layers are simply and easily stacked and connected on top of and below the lining layer.
[0011] Preferably, the binding tape is sewn onto the lining. This structure facilitates the installation of the binding tape, which is located on the outside of the oil-resistant layer. The stitching is placed on the binding tape, providing protection to the oil-resistant layer in the same way as the edging.
[0012] Preferably, the oil-resistant layer is made of aluminum film. With this structure, the aluminum film has good hydrophobic and oleophobic properties, making it difficult for pencils to leave scratches and easy to wipe clean if ink gets on it. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the ink-resistant pencil case of this utility model.
[0014] Figure 2 This is a cross-sectional view of the outer fabric of the ink-resistant pencil case of this utility model.
[0015] Figure 3 This is a cross-sectional view of the lining of the pencil case that prevents ink stains according to this utility model.
[0016] As shown in the picture: 1. Bag exterior, 2. Zipper, 3. Lining, 4. Outer fabric layer, 5. Inner fabric layer, 6. Oil-proof layer, 7. Binding, 8. Mesh pocket, 9. Restraint strap. Detailed Implementation
[0017] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.
[0018] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.
[0019] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.
[0020] like Figure 1 As shown, the ink-resistant pencil case of this utility model includes a bag body and a zipper 2. The bag body includes two front and back bag faces 1 on the outside and at least one lining 3 on the inside. The lining 3 is connected to the bag face 1. A binding strap 9 is provided on the lining 3 to hold the pen in place. A mesh pocket 8 is provided on the inside of one of the bag faces 1. The mesh pocket 8 is sewn to the bag face 1, and the sewn connection between the mesh pocket 8 and the bag face 1 is provided with a binding edge 7.
[0021] like Figure 2 As shown, the bag face 1 includes an outer fabric layer 4 and an oil-proof layer 6, with the oil-proof layer 6 layered and connected to the inner side of the outer fabric layer 4. The oil-proof layer 6 is sewn to the outer fabric layer 4, and a binding 7 is provided at the edge where the outer fabric layer 4 and the oil-proof layer 6 meet. The binding 7 is sewn to the bag face 1, and the zipper 2 is sewn to the binding 7.
[0022] like Figure 3 As shown, the lining 3 includes two oil-resistant layers 6 and a lining layer 5 located between the two oil-resistant layers 6. The two oil-resistant layers 6 and the lining layer 5 are stacked and sewn together, and an edge binding 7 is provided at the joint of the two oil-resistant layers 6 and the lining layer 5. A binding strap 9 is sewn onto the lining 3.
[0023] In this embodiment, the oil-proof layer 6 is made of aluminum film, which has good hydrophobic and oleophobic properties, making it difficult for pencils to leave scratches and easy to wipe clean if ink gets on it, thus preventing the inside of the pencil case from getting dirty with ink.
[0024] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.
Claims
1. A pencil case resistant to ink stains, comprising a bag body and a zipper (2), characterized in that, The bag body includes two front and rear bag faces (1) on the outside and at least one lining (3) on the inside. The lining (3) is connected to the bag faces (1). The bag face (1) includes an outer fabric layer (4) and an oil-proof layer (6). The oil-proof layer (6) is stacked and connected to the inside of the outer fabric layer (4). A zipper (2) is connected to the edge where the outer fabric layer (4) and the oil-proof layer (6) are joined. The lining (3) includes two oil-proof layers (6) and a lining layer (5) located between the two oil-proof layers (6). The two oil-proof layers (6) and the lining layer (5) are stacked and connected. An edge band (7) is provided at the edge where the two oil-proof layers (6) and the lining layer (5) are joined. A restraint strap (9) is provided on the lining (3). The restraint strap (9) is used to limit the pen.
2. The pen case for preventing ink staining according to claim 1, characterized in that, The oil-proof layer (6) is bonded to the outer fabric layer (4) by adhesive bonding, sewing, or hot pressing.
3. The ink-resistant pencil case according to claim 2, characterized in that, An edge band (7) is provided at the edge where the outer fabric layer (4) and the oil-proof layer (6) are joined. The edge band (7) is sewn to the bag surface (1), and the zipper (2) is sewn to the edge band (7).
4. The ink-resistant pencil case according to claim 2, characterized in that, At least one bag face (1) has a mesh pocket (8) on its inner side, the mesh pocket (8) is sewn to the bag face (1) and the sewn connection is provided with a binding edge (7).
5. The ink-resistant pencil case according to claim 1, characterized in that, The two oil-proof layers (6) and the lining layer (5) are bonded together, sewn together, or heat-pressed together.
6. The ink-resistant pencil case according to claim 5, characterized in that, The binding strap (9) is sewn onto the lining (3).
7. The pen case for preventing ink staining according to claim 1, characterized in that, The oil-proof layer (6) is an aluminum film.