Rotatable telescopic eraser protective sleeve

Abstract

The utility model discloses a rotatable telescopic eraser protective sleeve, which relates to the technical field of eraser packaging structures and comprises a shell and an eraser body, the eraser body is assembled on the inner side of the shell, a seat is movably sleeved in the shell, and the eraser body is sleeved below the seat. According to the rotatable telescopic eraser protective sleeve, through cooperative use of the rotating head, the elastic piece, the clamping point notch and the convex hull, in the process that the rotating head is rotated to adjust the extending length of the eraser body, the rotating head can extrude the convex hull on the elastic piece, and the elastic piece is elastically deformed; when the rotating head rotates to the angle matched with the outside of the shell, the convex hull can reset under the action of the elastic force of the elastic piece and is in butt joint with the clamping point notch in the rotating head, the rotating head is limited, it is ensured that the appearance of the shell and the appearance of the rotating head correspond to each other in a triangular mode, the dislocation feeling is avoided, and the use hand feeling is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber packaging structures, in particular to a rotatable and retractable rubber protective sleeve. Background Art

[0002] Erasers are stationery made of rubber that can erase traces of graphite or ink. There are many types of erasers, with different shapes and colors, including ordinary erasers, art erasers such as 2B, 4B, 6B for painting, and plastic erasers, etc. They are mainly used by students to erase mistakes when writing homework with pencils.

[0003] At present, there are various types of erasers on the market: bare erasers are easily contaminated by lead powder when consumers wipe or store them; erasers with roll paper packaging are easily damaged during repeated use, and the erasers become bare in the end; single plastic shell packaging, due to the dimensional accuracy of the eraser and the plastic shell, the eraser is not stable in the shell, easy to get stuck, easy to move, and difficult to debug after the eraser is worn; push-pull shell packaging, although this can optimize the above shortcomings, but the push-pull function is relatively simple, the rubber and the shell have weak cooperation, and it is easy to fall off (the eraser is extruded). For this reason, we designed a rotatable and retractable rubber protective cover to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a rotatable and retractable rubber protective cover, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a rotatable and retractable rubber protective cover, comprising a shell and a rubber body, the rubber body is assembled on the inner side of the shell, a seat is movably mounted in the shell, the rubber body is mounted below the seat, a threaded seat is arranged in the seat, the bottom end of the threaded seat is provided with evenly distributed boss undercuts, the top end of the rubber body is provided with a recess matching the boss undercuts, the top end of the shell is movably mounted with a rotating head, the bottom end of the rotating head extends to the inner side of the shell and is connected to a screw, and the screw is threadedly connected to the threaded seat.

[0006] Furthermore, the outer side of the rotating head is provided with evenly distributed friction lines, and the top end of the shell is provided with a circular opening for assembling the rotating head.

[0007] Furthermore, the top of the shell is provided with uniformly distributed elastic sheets, and the shell is provided with a through opening located outside the elastic sheets.

[0008] Furthermore, a convex bump is mounted on the elastic sheet, and a convex bump matching the convex bump is provided below the rotating head.

[0009] Furthermore, a cap is mounted on the end of the shell, and the sum of the lengths of the shell and the cap is greater than the length of the rubber body.

[0010] Furthermore, a slope is arranged at the bottom end of the rubber body, and a channel matching the screw rod is opened on the inner side of the rubber body.

[0011] Furthermore, a first stop rib is fixedly connected to the lower side of the rotating head, and a second stop rib matching the first stop rib is arranged on the inner side of the seat.

[0012] The utility model provides a rotatable and retractable rubber protective cover, which has the following beneficial effects:

[0013] 1. The rotatable and retractable rubber protective cover cooperates with the rotating head and the elastic sheet as well as the card point recess and the convex bulge, so that when the rotating head is rotated to adjust the extension length of the rubber body, the rotating head will squeeze the convex bulge on the elastic sheet and cause the elastic sheet to undergo elastic deformation, which is convenient for the rotation operation of the rotating head. When the rotating head is rotated to an angle that matches the outside of the shell, the convex bulge can be reset under the action of the elastic force of the elastic sheet and dock with the card point recess on the rotating head, so as to limit the rotating head, ensure that the appearance triangles of the shell and the rotating head correspond to each other without a sense of dislocation, and improve the feel of use.

[0014] 2. The rotatable and telescopic rubber protective cover is used in coordination with the threaded seat, the boss undercut and the rubber body, so that the rotatable and telescopic rubber protective cover is provided with a boss undercut on the seat, and a recess matching the boss undercut is opened at the top of the rubber body. When the rubber body is sleeved under the seat, the threaded seat is embedded in the inner side of the top of the rubber body, and the boss undercut on the threaded seat is butted with the recess inside the rubber body, thereby ensuring the connection effect between the rubber body and the seat, and avoiding the rubber body and the seat from falling off during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the exterior of the housing of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the rotating head and the outer part of the screw of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the top of the seat of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the bottom end of the seat of the utility model;

[0020] Figure 6 It is a schematic diagram of the structure of the outside of the rubber body of the utility model.

[0021] In the figure: 1, shell; 2, cap; 3, rubber body; 4, seat; 5, screw; 6, rotating head; 7, elastic sheet; 8, convex bump; 9, first stop rib; 10, card point notch; 11, threaded seat; 12, second stop rib; 13, boss undercut. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figures 1 to 4 The utility model provides a technical solution: a rotatable and retractable rubber protective cover, comprising a shell 1 and a rubber body 3, the rubber body 3 is assembled on the inner side of the shell 1, a seat 4 is movably mounted in the shell 1, a cap 2 is mounted at the end of the shell 1, the cap 2 at the end of the shell 1 can cooperate with the shell 1 to store the rubber body 3, the sum of the lengths of the shell 1 and the cap 2 is greater than the length of the rubber body 3, so that the rubber body 3 is well protected when not in use, and the outside of the rubber body 3 is prevented from being exposed and contaminated.

[0024] The rubber body 3 is mounted under the seat 4, and a slope is provided at the bottom end of the rubber body 3. The slope at the bottom end of the rubber body 3 can facilitate the wiping work of the rubber body 3, and a channel matching the screw 5 is opened on the inner side of the rubber body 3. The channel opened on the inner side of the rubber body 3 can facilitate the rotation of the screw 5. A threaded seat 11 is provided in the seat 4, and a uniformly distributed boss undercut 13 is provided at the bottom end of the threaded seat 11. A first stop rib 9 is fixedly connected to the bottom of the rotating head 6, and the first stop rib 9 under the rotating head 6 can cooperate with the second stop rib 12 on the inner side of the seat 4 to limit the seat 4 during its activity.

[0025] See also Figures 2 to 6 A second stop rib 12 matching the first stop rib 9 is provided on the inner side of the seat 4 to ensure the movable range of the seat 4 inside the shell 1. A notch matching the boss undercut 13 is provided on the top of the rubber body 3. A rotating head 6 is movably mounted on the top of the shell 1. The outer side of the rotating head 6 is provided with evenly distributed friction patterns. The friction patterns on the outside of the rotating head 6 can facilitate the rotating operation of the rotating head 6.

[0026] A circular opening for assembling a rotating head 6 is provided at the top of the shell 1. The circular opening at the top of the shell 1 can facilitate the socket assembly of the rotating head 6 and enable the rotating head 6 to rotate after assembly. The bottom end of the rotating head 6 extends to the inner side of the shell 1 and is connected to a screw 5. The screw 5 is threadedly connected to the threaded seat 11. The top of the shell 1 is provided with evenly distributed elastic sheets 7. The elastic sheets 7 at the top of the shell 1 can cooperate with the convex bump 8 to limit the rotating head 6, and a through opening located on the outside of the elastic sheet 7 is provided on the shell 1. The through opening on the shell 1 can facilitate the deformation of the elastic sheet 7 when the convex bump 8 is squeezed.

[0027] A convex bump 8 is mounted on the elastic sheet 7. When the rotating head 6 rotates, the convex bump 8 on the elastic sheet 7 is squeezed and causes the elastic sheet 7 to undergo elastic deformation. A convex bump 8 matching the convex bump 8 is provided below the rotating head 6. When the rotating head 6 rotates to an angle that matches the outside of the shell 1, the convex bump 8 can be reset under the elastic force of the elastic sheet 7 and dock with the card point notch 10 on the rotating head 6.

[0028] In summary, the rotatable and retractable rubber protective cover, when in use, the seat 4 is sleeved on the inner side of the shell 1, the rubber body 3 is assembled under the seat 4, a boss buckle 13 is provided on the seat 4, and a notch matching the boss buckle 13 is provided on the top of the rubber body 3. When the rubber body 3 is sleeved under the seat 4, the threaded seat 11 is embedded in the inner side of the top of the rubber body 3, and the boss buckle 13 on the threaded seat 11 is docked with the notch on the inner side of the rubber body 3, so as to ensure the connection effect between the rubber body 3 and the seat 4, and avoid the rubber body 3 and the seat 4 from falling off during use. The rubber body 3 can be extended by rotating the rotating head 6. The length can be adjusted. During the adjustment process, the rotating head 6 drives the screw 5 to rotate. The screw 5 pushes the seat 4 through its external thread to drive the rubber body 3 to move and extend from the inner side of the shell 1. When the rotating head 6 rotates, the convex bump 8 on the elastic sheet 7 is squeezed, and the elastic sheet 7 is elastically deformed. When the rotating head 6 rotates to an angle that matches the outside of the shell 1, the convex bump 8 can be reset under the action of the elastic force of the elastic sheet 7 and dock with the card point notch 10 on the rotating head 6, so as to limit the rotating head 6 and ensure that the appearance triangles of the shell 1 and the rotating head 6 correspond to each other without any sense of dislocation. The entire use process of the rotatable and telescopic rubber protective cover is completed.

[0029] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotatable and retractable rubber protective cover, comprising a housing (1) and a rubber body (3), wherein the rubber body (3) is mounted on the inner side of the housing (1), characterized in that: The housing (1) is movably mounted with a seat (4), the rubber body (3) is mounted below the seat (4), a threaded seat (11) is arranged in the seat (4), the bottom end of the threaded seat (11) is provided with evenly distributed boss undercuts (13), the top end of the rubber body (3) is provided with a recess matching the boss undercuts (13), the top end of the housing (1) is movably mounted with a rotating head (6), the bottom end of the rotating head (6) extends to the inner side of the housing (1) and is connected to a screw rod (5), and the screw rod (5) is threadedly connected to the threaded seat (11).

2. The rotatable and retractable rubber protective cover according to claim 1, characterized in that: The outer side of the rotating head (6) is provided with evenly distributed friction patterns, and the top end of the housing (1) is provided with a circular opening for assembling the rotating head (6).

3. The rotatable and retractable rubber protective cover according to claim 1, characterized in that: The top of the shell (1) is provided with uniformly distributed elastic sheets (7), and the shell (1) is provided with a through opening located outside the elastic sheets (7).

4. The rotatable and retractable rubber protective cover according to claim 3, characterized in that: A convex bump (8) is mounted on the elastic sheet (7), and a convex bump (8) matching the convex bump (8) is provided below the rotating head (6).

5. The rotatable and retractable rubber protective cover according to claim 1, characterized in that: A cap (2) is mounted on the end of the shell (1), and the sum of the lengths of the shell (1) and the cap (2) is greater than the length of the rubber body (3).

6. The rotatable and retractable rubber protective cover according to claim 1, characterized in that: The bottom end of the rubber body (3) is provided with an inclined surface, and the inner side of the rubber body (3) is provided with a channel matching the screw rod (5).

7. The rotatable and retractable rubber protective cover according to claim 1, characterized in that: A first stop rib (9) is fixedly connected to the lower side of the rotating head (6), and a second stop rib (12) matching the first stop rib (9) is arranged on the inner side of the seat (4).

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