Propelling pencil with telescopic eraser
By introducing threaded structures and guide block design into automatic pencils, the rubber expansion and contraction is achieved, solving the problems of easy breakage and short service life in the prior art, and significantly improving the use length and durability of the rubber.
Patent Information
- Application Number
- CN202421579143.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The existing automatic pencil eraser design is difficult to find a balance between practicality and durability. Long rubber is prone to breaking, and short rubber has a short service life and cannot meet long-term use needs.
An eraser telescopic automatic pencil is designed. By setting a threaded structure and guide block in the rotating barrel, the adjustment block moves along the guide channel, the rubber telescopic and length are increased.
It significantly extends the length of the rubber, solves the problem of short service life, and maintains structural stability and simplicity of operation.
Smart Images
Figure CN222246652U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pencils, in particular to an automatic pencil with a retractable eraser. Background Art
[0002] The eraser design on the top of a mechanical pencil needs to find a balance between practicality and durability. Usually, an eraser designed to be too long will cause it to break easily during use due to the lever effect, especially when a large amount of pressure is applied. On the other hand, a design that is too short will shorten the life of the eraser and cannot meet the needs of long-term use. Summary of the invention
[0003] The utility model aims to solve the above problems in the prior art and proposes a retractable rubber automatic pencil, which has the characteristics of extending the length of the rubber and being retractable.
[0004] The purpose of the utility model can be achieved through the following technical solutions:
[0005] A mechanical pencil with a retractable eraser, comprising:
[0006] A core storage component, wherein the core storage component has an insertion hole, and a first limiting portion is arranged on the inner wall of the insertion hole;
[0007] A rotating cylinder, wherein the rotating cylinder has a mounting channel, and the mounting channel has a threaded structure arranged along the length direction of the rotating cylinder;
[0008] a fixing rod, the fixing rod being installed in the rotating cylinder, and one end of the fixing rod being inserted into the insertion hole, the fixing rod being provided with a second limiting portion cooperating with the first limiting portion, the first limiting portion cooperating with the second limiting portion to limit the rotation of the fixing rod, the fixing rod having a guide channel and a guide opening communicating with the guide channel;
[0009] an adjusting block, the adjusting block being slidably disposed in the guide channel, and having a guide block passing through the guide opening, the guide block cooperating with the threaded structure, and the adjusting block being able to move along the guide channel direction of the fixing rod when the rotating cylinder rotates; and
[0010] A rubber is fixed on the adjusting block and can extend into the guide channel.
[0011] The above-mentioned retractable eraser mechanical pencil also includes a pen tip and a pen barrel, the inside of the pen barrel is provided with a limiting step, the core storage component is installed in the pen barrel and abuts against the limiting adjustment, the pen tip is fixed on the pen barrel and abuts against the other end of the core storage component to limit and fix the core storage component.
[0012] In the above-mentioned retractable eraser mechanical pencil, there are two guide openings, which are symmetrically arranged on the fixing rod.
[0013] In the above-mentioned retractable eraser mechanical pencil, the adjusting block is provided with a clamping opening, and the eraser is installed in the clamping opening.
[0014] In the above-mentioned retractable eraser mechanical pencil, a turning mark is provided on the rotating cylinder.
[0015] In the above-mentioned retractable eraser mechanical pencil, a plurality of elastic buckles are arranged on the fixed rod, and the elastic buckles can be fastened to the end of the rotating cylinder to limit the fixed rod from coming out relative to the rotating cylinder in a direction away from the core storage component.
[0016] The above-mentioned retractable eraser mechanical pencil further includes a limit ring, which is sleeved on the fixed rod. A limit structure is provided at one end of the fixed rod away from the core storage component. The limit switch can abut against the limit structure to limit the limit switch from escaping in the direction away from the core storage component. When the fixed rod is inserted into the rotating cylinder, the elastic buckle is limited at one end of the rotating cylinder, and the limit ring is limited at the other end of the rotating cylinder.
[0017] Compared with the prior art, this application has the following advantages:
[0018] In the design of the present application, by rotating the rotating cylinder, it can be rotated relative to the core storage component. The threaded structure in the rotating cylinder rotates accordingly, and drives the guide block to move along the threaded structure. Due to the limitation of the guide block, the adjustment block can only move along the guide channel. As the adjustment block moves, the rubber installed on it can extend or retract from the fixed rod. Such a design significantly increases the use length of the rubber and effectively solves the problem of short service life of the rubber. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the rotating cylinder after being cut open in this application.
[0020] Figure 2 It is a schematic diagram of a structure when the rubber is extended in this application;
[0021] Figure 3 It is a schematic diagram of the structure after the rotating cylinder, the fixing rod and the limiting ring in the present application are disassembled;
[0022] Figure 4 It is a partial cross-sectional structural diagram of the mechanical pencil in the present application;
[0023] Figure 5 yes Figure 3 A schematic diagram of a structure of a fixing rod in the A direction;
[0024] Figure 6 yes Figure 4 A cross-sectional structural diagram at the AA position.
[0025] In the figure,
[0026] 2. Core storage component; 21. First limiting part;
[0027] 3. Rotating cylinder; 31. Mounting channel; 311. Threaded structure;
[0028] 4. Fixing rod; 41. Second limiting portion; 42. Guide channel; 43. Guide opening; 44. Elastic buckle; 45. Limiting structure;
[0029] 5. Adjustment block; 51. Guide block;
[0030] 6. Eraser;
[0031] 7. Pen tip;
[0032] 8. Pen holder; 81. Limiting step;
[0033] 9. Limiting ring. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0035] like Figures 1 to 6 As shown, a mechanical pencil with a retractable eraser 6 comprises: a core storage component 2, a rotating cylinder 3, a fixed rod 4, an adjustment block 5 and an eraser 6. The core storage component 2 has an insertion hole, and a first limit portion 21 is arranged on the inner wall of the insertion hole; the rotating cylinder 3 has a mounting channel 31, and the mounting channel 31 has a threaded structure 311 arranged along the length direction of the rotating cylinder 3; the fixed rod 4 is installed in the rotating cylinder 3, and one end of the fixed rod 4 is inserted into the insertion hole, and the fixed rod 4 is provided with a second limit portion 41 matched with the first limit portion 21. The first limiting portion 21 cooperates with the second limiting portion 41 to limit the rotation of the fixed rod 4. The fixed rod 4 has a guide channel 42 and a guide opening 43 connected to the guide channel 42; the adjusting block 5 is slidably arranged in the guide channel 42, and the adjusting block 5 has a guide block 51 passing through the guide opening 43. The guide block 51 cooperates with the threaded structure 311. When the rotating cylinder 3 rotates, the adjusting block 5 can move along the guide channel 42 of the fixed rod 4; the rubber 6 is fixed on the adjusting block 5, and the rubber 6 can extend into the guide channel 42.
[0036] In the design of the present application, by rotating the rotating cylinder 3, it can be rotated relative to the core storage component 2. The threaded structure 311 in the rotating cylinder 3 rotates accordingly, and drives the guide block 51 to move along the threaded structure 311. Due to the limitation of the guide block 51, the adjustment block 5 can only move along the guide channel 42. As the adjustment block 5 moves, the rubber 6 installed on it can extend or retract from the fixed rod 4. Such a design significantly increases the use length of the rubber 6 and effectively solves the problem of short service life of the rubber 6.
[0037] Through the cooperation of the first limiting portion 21 and the second limiting portion 41, the fixing rod 4 can be fixed relative to the core storage component 2 after being inserted into the insertion hole. In this way, when the rotating cylinder 3 is rotated, the rubber 6 can be extended and retracted.
[0038] The design of the guide opening 43 ensures that the adjustment block 5 can only move along the direction of the guide channel 42 and cannot rotate, thereby maintaining the stability of the overall structure and the simplicity of operation.
[0039] Specifically, it also includes a pen tip 7 and a pen body 8. The inside of the pen body 8 is provided with a limiting step 81. The core storage component 2 is installed in the pen body 8 and abuts against the limiting adjustment. The pen tip 7 is fixed on the pen body 8 and abuts against the other end of the core storage component 2 to limit and fix the core storage component 2.
[0040] The setting of the limiting step 81 inside the pen barrel 8 provides a fixing point for the core storage component 2, and after the subsequent installation through the pen tip 7, the core storage component 2 can be stably installed in the pen barrel 8 to avoid movement or shaking during use.
[0041] Specifically, there are two guide openings 43 , which are symmetrically arranged on the fixing rod 4 .
[0042] The two symmetrical guide openings 43 can evenly disperse the moving pressure of the adjusting block 5 on the fixing rod 4. This symmetrical layout helps to keep the adjusting block 5 stable during movement, reduce the possibility of deflection and jamming, and ensure the smooth expansion and contraction of the rubber 6 or other components.
[0043] Specifically, the adjusting block 5 has a clamping opening, and the rubber 6 is installed in the clamping opening.
[0044] The adjusting block 5 provided with the clamping opening makes the installation and replacement of the eraser 6 simple and quick. The user can easily remove the old eraser 6 and install a new eraser 6 without professional tools or complicated steps, thereby improving the convenience of maintenance.
[0045] Specifically, a turning mark is provided on the rotating cylinder 3 .
[0046] The turning mark enables the user to intuitively identify the rotation direction of the rotating cylinder 3, thereby accurately controlling the extension and retraction of the rubber 6 or the advancement and recovery of the lead core. This intuitive indication helps to reduce operating errors, especially for new users or when it is inconvenient to use it carefully.
[0047] Specifically, a plurality of elastic buckles 44 are provided on the fixing rod 4 , and the elastic buckles 44 can be fastened to the end of the rotating cylinder 3 to limit the fixing rod 4 from coming out relative to the rotating cylinder 3 in a direction away from the core storage component 2 .
[0048] After the fixing rod 4 passes through the rotating cylinder 3, it can be fastened to the edge of the rotating cylinder 3 by the elastic buckle 44 to prevent the fixing rod 4 from coming out relative to the rotating cylinder 3 in a direction away from the core storage component 2. When it is necessary to disassemble, it is only necessary to install the elastic buckle 44 toward the inner side of the guide channel 42 so that the elastic buckle 44 can be separated from the edge of the rotating cylinder 3, and the fixing rod 4 can be disassembled.
[0049] Specifically, it also includes a limit ring 9, which is sleeved on the fixed rod 4. A limit structure 45 is provided at one end of the fixed rod 4 away from the core storage component 2. The limit switch can abut against the limit structure 45 to limit the limit switch from escaping in the direction away from the core storage component 2. When the fixed rod 4 is inserted into the rotating cylinder 3, the elastic buckle is limited at one end of the rotating cylinder 3, and the limit ring 9 is limited at the other end of the rotating cylinder 3.
[0050] The limiting ring 9 is sleeved on the fixing rod 4 and abuts against the limiting structure 45. Such a configuration effectively limits the limiting ring 9 from escaping in the direction away from the core storage component 2. Such physical limitation ensures that the fixing rod 4 remains stable during long-term use or when subjected to external forces and can be restricted in the rotating cylinder 3.
[0051] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.
[0052] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0053] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.
[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A mechanical pencil with a retractable eraser, characterized in that: include: A core storage component (2), wherein the core storage component (2) has an insertion hole, and a first limiting portion (21) is provided on the inner wall of the insertion hole; A rotating cylinder (3), wherein the rotating cylinder (3) has a channel, and the channel has a thread structure (311) arranged along the length direction of the rotating cylinder (3); a fixed rod (4), the fixed rod (4) being installed in the rotating cylinder (3), and one end of the fixed rod (4) being inserted into the insertion hole, the fixed rod (4) being provided with a second limiting portion (41) cooperating with the first limiting portion (21), the first limiting portion (21) cooperating with the second limiting portion (41) to limit the rotation of the fixed rod (4), the fixed rod (4) having a guide channel (42) and a guide opening (43) communicating with the guide channel (42); an adjusting block (5), the adjusting block (5) being slidably disposed in the guide channel (42), and the adjusting block (5) having a guide block (51) passing through the guide opening (43), the guide block (51) cooperating with the threaded structure (311), so that when the rotating cylinder (3) rotates, the adjusting block (5) can move along the direction of the guide channel (42) of the fixing rod (4); and A rubber (6), wherein the rubber (6) is fixed on the adjusting block (5), and the rubber (6) can extend into the guide channel (42).
2. The retractable eraser mechanical pencil according to claim 1, characterized in that: The invention also comprises a pen tip (7) and a pen shaft (8), wherein the pen shaft (8) has a limiting step (81) inside, the core storage component (2) is installed in the pen shaft (8) and abuts against the limiting adjustment, and the pen tip (7) is fixed on the pen shaft (8) and abuts against the other end of the core storage component (2) so that the core storage component (2) is limited and fixed.
3. The retractable eraser mechanical pencil according to claim 1, characterized in that: The guide openings (43) are provided with two portions and are symmetrically arranged on the fixing rod (4).
4. The retractable eraser mechanical pencil according to claim 1, characterized in that: The adjusting block (5) has a clamping opening, and the rubber (6) is installed in the clamping opening.
5. The mechanical pencil with a retractable eraser according to claim 1, characterized in that: The rotating cylinder (3) is provided with a turning mark.
6. The mechanical pencil with a retractable eraser according to claim 1, characterized in that: The fixing rod (4) is provided with a plurality of elastic buckles (44), and the elastic buckles (44) can be fastened to the end of the rotating cylinder (3) to limit the fixing rod (4) from coming out relative to the rotating cylinder (3) in a direction away from the core storage component (2).
7. The mechanical pencil with a retractable eraser according to claim 6, characterized in that: It also comprises a limiting ring (9), wherein the limiting ring (9) is sleeved on the fixing rod (4), and a limiting structure (45) is arranged at one end of the fixing rod (4) away from the core storage component (2), and the limiting switch can abut against the limiting structure (45) to limit the limiting switch from coming out in a direction away from the core storage component (2). When the fixing rod (4) is inserted into the rotating cylinder (3), the elastic buckle is limited at one end of the rotating cylinder (3), and the limiting ring (9) is limited at the other end of the rotating cylinder (3).