Winding film with multifunctional mandrel

Abstract

A wrapping film with a multifunctional mandrel comprises a mandrel body which is cylindrical, and the mandrel body is provided with a through inner hole; the plastic film is wound on the outer wall of the mandrel body in a multi-layer structure; a first containing cavity and a second containing cavity are formed in the inner side of the mandrel body, a cutting tool is stored in the first containing cavity, and a measuring tool is stored in the second containing cavity. The plastic film cutting device is provided with the cutting tool, so that a plastic film can be cut by means of the cutting tool when needed, and the use function that the plastic film is different in length is achieved; the measuring tool is arranged, and after a part of plastic film is used, the remaining plastic film can be measured through the measuring tool, so that the remaining amount is obtained, and the replacement period of the wrapping film is estimated.

Description

Technical Field

[0001] The utility model relates to the technical field of stretch film products, in particular to a stretch film with a multifunctional core shaft. Background Art

[0002] Stretch film is a plastic film commonly used for packaging, usually made of polyethylene (PE). Its main function is to protect items, improve stability and simplify storage and transportation. Stretch film is usually transparent and can be tightly wrapped around the goods to prevent dust, dirt and moisture from intruding, while also preventing the goods from moving or being damaged during transportation.

[0003] During processing and manufacturing, the wrapping film generally includes a hard core shaft in the center and a plastic film body wrapped around the hard core shaft. In actual use, the wrapping film also has some inconveniences. For example, when using the cling film, only part of it needs to be used each time, so it needs to be torn apart during use. There are three common ways to tear it apart: one is to tear it by hand, which is difficult to operate, and the tearing effect is extremely poor, and the cross section is extremely uneven; the second is to use tools such as scissors, because the film is too thin, it is not easy to operate, especially when the scissors are blunt, it is easy to break; the third is to buy cling film that comes with a cutter, but the price is high, and the cutter in the products on the market is exposed, which is easy to cut the skin when it touches the skin, so there is a safety risk to the user.

[0004] As an example of the prior art, referring to the patent document CN219173867U, a wrapping film with a self-contained cutting function is disclosed, including a wrapping film body, a support plate, a sliding block, a sliding rod and a cutting knife. The upper and lower ends of the wrapping film body are provided with connecting rods, one side of the connecting rod is provided with a mounting rod, a sliding block is provided on the support plate, balls are provided on the left and right side walls of the sliding block, a sliding rod is provided through the sliding block, a pull rod is provided at one end of the sliding rod, a tool holder is provided at the other end of the sliding rod, and a cutting knife is provided on the tool holder. The utility model is provided by the support plate and the sliding block. Since balls and rolling grooves are provided between the support plate and the sliding block, the sliding block can be slid and adjusted on the support plate, thereby driving the cutting knife to slide and adjust to cut the wrapping film. In the technical example, a wrapping film with a self-contained cutting function is provided. The tool structure is relatively complex, and it needs to occupy a large amount of space, which is not conducive to packaging, transportation and use, and has no market application prospects. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a stretch film with a multifunctional mandrel.

[0006] The technical solution of the utility model to solve the technical problem is: a wrapping film with a multifunctional mandrel, comprising:

[0007] The mandrel body is cylindrical and has a through inner hole;

[0008] A plastic film having a multi-layer structure wound around the outer wall of the mandrel body;

[0009] A first accommodating cavity and a second accommodating cavity are formed on the inner side of the core shaft body. A cutting tool is stored in the first accommodating cavity, and a measuring tool is stored in the second accommodating cavity.

[0010] Preferably, the first accommodating cavity and the second accommodating cavity are distributed along a ring shape at intervals of 180 degrees.

[0011] Optionally, the upper ends of the first accommodating cavity and the second accommodating cavity are both open ends, and a detachable cover plate is provided at the open ends; the upper ends of the first accommodating cavity and the second accommodating cavity are both closed ends.

[0012] In some preferred embodiments of the present utility model, the cutting tool comprises a fixed cutting housing, a movable cutting tool, and a return spring;

[0013] Wherein, the fixed cutting shell has a storage cavity, the movable cutting tool can extend or retract into the storage cavity, and a guide through hole is provided at the bottom of the storage cavity;

[0014] One end of the movable cutting tool is provided with cutting teeth, and the other end of the movable cutting tool is provided with a push rod, and the push rod is inserted into the guide through hole and can move along the guide through hole;

[0015] The return spring acts on the movable cutting tool so that the movable cutting tool always has a movement tendency of retracting into the storage cavity.

[0016] Furthermore, the movable cutting tool comprises a large diameter section and a small diameter section, the large diameter section is located in the storage cavity, the small diameter section can extend out of or retract into the storage cavity, and the cutting saw teeth are arranged at the upper end of the small diameter section;

[0017] A stepped limiting retaining wall is arranged in the receiving cavity, and the return spring abuts between the large diameter section and the limiting retaining wall.

[0018] Furthermore, a first limiting column is protruding from the stepped limiting retaining wall, a second limiting column is protruding from the large diameter section, and both ends of the return spring are respectively inserted into the first limiting column and the second limiting column.

[0019] Preferably, a first strip magnet is provided at the upper end of the large diameter section, and a second strip magnet is provided at the upper end of the small diameter section. When the first strip magnet and the second strip magnet are close to each other, a magnetic force is generated to attract the large diameter section and the small diameter section together.

[0020] In some preferred embodiments of the present utility model, the measuring tool includes a ruler body, a first clamping plate and a second clamping plate;

[0021] The ruler body is provided with scale marking lines;

[0022] The first clamping plate is rotatably connected to the ruler body;

[0023] The second clamping plate is rotatably connected to the ruler body, and the second clamping plate forms a sliding fit with the ruler body through a sliding structure.

[0024] Specifically, a transverse sliding groove is provided on the ruler body, and a guide sliding block is provided on the second clamping plate;

[0025] The guide slider includes a rotating shaft section and limiting end faces located at both ends of the rotating shaft section. The rotating shaft section is slidably arranged in the transverse slide groove and can move along the transverse slide groove, and the vertical dimension of the limiting end face is larger than the vertical dimension of the transverse slide groove, so that the rotating shaft section and the transverse slide groove can be anti-separation matched.

[0026] The beneficial effects of the utility model are:

[0027] 1. A cutting tool is provided, and the plastic film can be divided with the help of the cutting tool when needed, so as to achieve the use function of the plastic film in different lengths.

[0028] 2. After using a part of the plastic film, the remaining plastic film can be measured by a measuring tool to obtain the remaining amount to estimate the replacement cycle of the stretch film.

[0029] 3. By optimizing the internal structure of the core shaft body, a first accommodating chamber and a second accommodating chamber are provided to accommodate cutting tools and measuring tools, preventing the cutting tools and measuring tools from being exposed to the outside and causing harm to the user when not needed, and realizing the storage function, which can be taken out when in use and put back after use to prevent the cutting tools and measuring tools from being lost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the utility model when the cover is closed.

[0031] Figure 2 It is a structural schematic diagram of the utility model when the cover is opened.

[0032] Figure 3 It is a cross-sectional view of the utility model when the cover is opened.

[0033] Figure 4 It is a schematic diagram of the structure of a cutting tool.

[0034] Figure 5 It is a cross-sectional view of the cutting tool and an enlarged schematic diagram of the local structure.

[0035] Figure 6 It is a schematic diagram of the cutting tool in use.

[0036] Figure 7 It is a schematic diagram of the structure of the measuring tool.

[0037] Figure 8 It is a schematic diagram of the measuring tool in use.

[0038] Fig. 9 It is a structural schematic diagram of the guide slider and the second clamping plate.

[0039] Fig.10 This is a schematic diagram of the structure when the measuring tools are stored.

[0040] In the figure: 1, mandrel body; 11, through inner hole; 12, first accommodating chamber; 13, second accommodating chamber; 1a, open end; 1b, closed end; 14, cover plate; 2, plastic film; 3, cutting tool; 31, fixed cutting shell; 311, storage chamber; 3111, guide through hole; 3112, stepped limiting retaining wall; 3113, first limiting column; 32, movable cutting tool; 321, large diameter area Segment; 3211, second limiting column; 3212, first strip magnet; 322, small diameter segment; 3221, second strip magnet; 33, return spring; 34, cutting saw teeth; 35, push rod; 4, measuring tool; 41, ruler body; 411, scale marking line; 412, horizontal slide groove; 42, first clamping plate; 43, second clamping plate; 44, guide slider; 441, shaft segment; 442, limiting end face. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0042] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 on the present invention.

[0043] In the description of the present invention, it should be noted that, 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 components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1

[0045] Reference Figures 1 to 10 , a stretch film with a multifunctional mandrel, comprising:

[0046] The mandrel body 1 is cylindrical and has a through inner hole 11, which is convenient for a user to insert his hand into to move and use the wrapping film;

[0047] A plastic film 2, which is in a multi-layer structure and is wound around the outer wall of the mandrel body 1;

[0048] A first accommodating cavity 12 and a second accommodating cavity 13 are formed on the inner side of the spindle body 1 . The cutting tool 3 is stored in the first accommodating cavity 12 , and the measuring tool 4 is stored in the second accommodating cavity 13 .

[0049] The above content is the basic structural scheme of the utility model. Compared with the prior art, its advantages are at least that, first, a cutting tool 3 is provided, and the plastic film 2 can be divided with the help of the cutting tool 3 when needed to achieve the use function of the plastic film 2 of different lengths; second, after using a part of the plastic film 2, the remaining plastic film 2 can be measured by the measuring tool 4, so as to obtain the remaining amount and estimate the replacement cycle of the wrapping film; third, by optimizing the internal structure of the core shaft body 1, a first accommodating chamber 12 and a second accommodating chamber 13 are provided to accommodate the cutting tool 3 and the measuring tool 4, so as to prevent the cutting tool 3 and the measuring tool 4 from being exposed to the outside and causing harm to the user when not needed, and realize the storage function, which can be taken out when in use and put back after use to prevent the cutting tool 3 and the measuring tool 4 from being lost.

[0050] Preferably, the first accommodating cavity 12 and the second accommodating cavity 13 are distributed along the ring at intervals of 180 degrees, so that the weight distribution of the core shaft body 1 is more balanced, so that it has a better hand feel during the rotation process.

[0051] In some preferred embodiments of the utility model, the upper ends of the first accommodating chamber 12 and the second accommodating chamber 13 are both open ends 1a, and a detachable cover plate 14 is provided at the open ends 1a; the upper ends of the first accommodating chamber 12 and the second accommodating chamber 13 are both closed ends 1b. Through the setting of the cover plate 14, the open end 1a can be closed, that is, when the cutting tool 3 or the measuring tool 4 is needed, the cover plate 14 is removed to expose the open end 1a, so that the user can take out the cutting tool 3 or the measuring tool 4 from the first accommodating chamber 12 or the second accommodating chamber 13; after use, the cutting tool 3 or the measuring tool 4 is put back into the first accommodating chamber 12 or the second accommodating chamber 13, and then the cover plate 14 is covered on the open end 1a, so that the open end 1a is closed, so that in the process of moving the wrapping film, the phenomenon of the cutting tool 3 or the measuring tool 4 falling out from the open end 1a can be effectively prevented.

[0052] Embodiment 2

[0053] Based on the structure of the first embodiment, this embodiment provides a preferred cutting tool 3 structure solution, which is as follows:

[0054] Reference Figure 3 to Figure 6 The cutting tool 3 includes a fixed cutting shell 31, a movable cutting tool 32, and a reset spring 33; wherein, the fixed cutting shell 31 has a storage cavity 311, the movable cutting tool 32 can extend or retract into the storage cavity 311, and a guide through hole 3111 is provided at the bottom of the storage cavity 311; one end of the movable cutting tool 32 is provided with a cutting serration 34, and the other end of the movable cutting tool 32 is provided with a push rod 35, the push rod 35 is penetrated by the guide through hole 3111 and can move along the guide through hole 3111, and the guide through hole 3111 provides a motion guiding effect on the push rod 35; the reset spring 33 acts on the movable cutting tool 32, so that the movable cutting tool 32 always has a movement tendency to retract into the storage cavity 311.

[0055] When the cutting tool 3 is needed, the user presses the push rod 35 to move the movable cutting tool 32 relative to the fixed cutting shell 31, so that the cutting teeth 34 are exposed outside the storage cavity 311, and the cutting teeth 34 are aligned with and pierce the plastic film 2 to be processed, and then the user can easily tear the plastic film 2 of the required length by hand; when use is completed, release the push rod 35, and the movable cutting tool 32 retracts into the storage cavity 311 under the action of the reset spring 33, and the cutting teeth 34 also retracts into the storage cavity 311, eliminating the safety risk of the cutting teeth 34 being exposed.

[0056] Furthermore, the movable cutting tool 32 is specifically composed of: a large diameter section 321 and a small diameter section 322, the large diameter section 321 is located in the storage cavity 311, the small diameter section 322 can extend or retract into the storage cavity 311, and the cutting teeth 34 are arranged at the upper end of the small diameter section 322; in order to realize the installation and telescopic movement of the reset spring 33, a stepped limit stop wall is provided in the storage cavity 311, and the reset spring 33 abuts between the large diameter section 321 and the limit stop wall.

[0057] Furthermore, the stepped limiting retaining wall is provided with a first limiting post 3113, the large diameter section 321 is provided with a second limiting post 3211, and the two ends of the reset spring 33 are respectively inserted into the first limiting post 3113 and the second limiting post 3211. The first limiting post 3113 and the second limiting post 3211 are provided to better limit the reset spring 33, so that the reset spring 33 is limited in non-axial movement while ensuring normal axial telescopic movement, thereby ensuring its movement stability.

[0058] Preferably, the upper end of the large diameter section 321 is provided with a first strip magnet 3212, and the upper end of the small diameter section 322 is provided with a second strip magnet 3221. When the first strip magnet 3212 and the second strip magnet 3221 are close to each other, a magnetic force is generated to adsorb the large diameter section 321 and the small diameter section 322 together. The preferred solution can achieve a detachable connection between the large diameter section 321 and the small diameter section 322. Once the cutting teeth 34 on the small diameter section 322 are damaged during use, the small diameter section 322 can be replaced separately, reducing maintenance costs; secondly, a modular structural design is achieved. A large diameter section 321 of a single size can be matched with a small diameter section 322 with cutting teeth 34 of different specifications to meet the needs of different types of wrapping films; thirdly, the magnetic connection method makes disassembly and assembly very convenient and quick.

[0059] Embodiment 3

[0060] Based on the structure of the first embodiment, this embodiment provides a preferred structure of the measuring tool 4, which is as follows:

[0061] Reference Figure 7 to Figure 10 The measuring tool 4 includes a ruler body 41, a first clamping plate 42 and a second clamping plate 43. The ruler body 41 has a scale mark 411; the first clamping plate 42 is rotatably connected to the ruler body 41; the second clamping plate 43 is rotatably connected to the ruler body 41, and the second clamping plate 43 forms a sliding fit with the ruler body 41 through a sliding structure.

[0062] The first clamping plate 42 serves as a clamping plate at the zero point, and the second clamping plate 43 serves as a clamping plate at the actual thickness position of the plastic film 2 .

[0063] The working principle of the measuring tool 4 is as follows: first take out the measuring tool 4, rotate the first clamping plate 42 and the second clamping plate 43 relative to the measuring tool 4 body respectively, and form a 90-degree angle between them after the rotation, then the first clamping plate 42 contacts and clamps the inner wall of the mandrel body 1, and at the same time adjusts the position of the second clamping plate 43 by sliding, so that the second clamping plate 43 contacts and clamps the outer wall of the outermost plastic film 2, and finally the user reads the data of the scale mark 411 on the ruler body 41 corresponding to the second clamping plate 43 to obtain the remaining thickness of the current wrapping film. It should be noted that the setting of the scale mark 411 can include the value of the mandrel body 1 (the thickness of the plastic film 2 needs to be calculated after the thickness data of the mandrel body 1 is subtracted from the measured data), or it can be the value after removing the thickness of the mandrel body 1 (similar to the peeling function during weighing, the thickness of the plastic film 2 can be directly obtained), and no special limitation is made here.

[0064] After the measuring tool 4 is used, the first clamping plate 42 and the second clamping plate 43 are rotated and reset, that is, the first clamping plate 42 and the second clamping plate 43 are stacked on the measuring tool 4 body, thereby occupying less space and being convenient to be stored in the second accommodating cavity.

[0065] More specifically, the arrangement between the second clamping plate 43 and the ruler body 41 is as follows: a transverse groove 412 is provided on the ruler body 41, and a guide slider 44 is provided on the second clamping plate 43; the guide slider 44 includes a rotating shaft section 441, and limiting end faces 442 located at both ends of the rotating shaft section 441, the rotating shaft section 441 is slidably arranged in the transverse groove 412 (to realize the rotation function) and can move along the transverse groove 412 (to realize the sliding function), and the vertical dimension of the limiting end face 442 is larger than the vertical dimension of the transverse groove 412, so that the rotating shaft section 441 and the transverse groove 412 can be anti-detached and matched.

[0066] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A stretch film with a multifunctional mandrel, comprising: A mandrel body (1) which is cylindrical and has a through inner hole (11); A plastic film (2) having a multi-layer structure and wound around the outer wall of the core shaft body (1); Features: A first accommodating cavity (12) and a second accommodating cavity (13) are provided on the inner side of the spindle body (1); a cutting tool (3) is stored in the first accommodating cavity (12), and a measuring tool (4) is stored in the second accommodating cavity (13).

2. The stretch film with a multifunctional mandrel according to claim 1, characterized in that: The first accommodating cavity (12) and the second accommodating cavity (13) are distributed along a ring shape at intervals of 180 degrees.

3. The stretch film with a multifunctional mandrel according to claim 1, characterized in that: The upper ends of the first accommodating chamber (12) and the second accommodating chamber (13) are both open ends (1a), and a detachable cover plate (14) is provided at the open end (1a); the upper ends of the first accommodating chamber (12) and the second accommodating chamber (13) are both closed ends (1b).

4. The stretch film with a multifunctional mandrel according to claim 1, characterized in that: The cutting tool (3) comprises a fixed cutting shell (31), a movable cutting tool (32), and a return spring (33); The fixed cutting housing (31) has a storage cavity (311) therein, the movable cutting tool (32) can extend out of or retract into the storage cavity (311), and a guide through hole (3111) is provided at the bottom of the storage cavity (311); One end of the movable cutting tool (32) is provided with a cutting sawtooth (34), and the other end of the movable cutting tool (32) is provided with a push rod (35), and the push rod (35) is inserted into the guide through hole (3111) and can move along the guide through hole (3111); The return spring (33) acts on the movable cutting tool (32) so that the movable cutting tool (32) always has a movement tendency to retract into the storage cavity (311).

5. The stretch film with a multifunctional mandrel according to claim 4, characterized in that: The movable cutting tool (32) comprises a large diameter section (321) and a small diameter section (322), the large diameter section (321) is located in the storage cavity (311), the small diameter section (322) can extend out of or retract into the storage cavity (311), and the cutting saw teeth (34) are arranged at the upper end of the small diameter section (322); A stepped stop wall is provided in the storage cavity (311), and the return spring (33) abuts between the large diameter section (321) and the stop wall.

6. The stretch film with a multifunctional mandrel according to claim 5, characterized in that: A first limiting column (3113) is protrudingly provided on the stepped limiting retaining wall, a second limiting column (3211) is protrudingly provided on the large diameter section (321), and two ends of the return spring (33) are respectively inserted into the first limiting column (3113) and the second limiting column (3211).

7. The stretch film with a multifunctional mandrel according to claim 5, characterized in that: A first strip magnet (3212) is disposed at the upper end of the large diameter section (321), and a second strip magnet (3221) is disposed at the upper end of the small diameter section (322). When the first strip magnet (3212) and the second strip magnet (3221) are brought into close proximity with each other, a magnetic force is generated to attract the large diameter section (321) and the small diameter section (322) together.

8. The stretch film with a multifunctional mandrel according to claim 1, characterized in that: The measuring tool (4) comprises a ruler body (41), a first clamping plate (42) and a second clamping plate (43); The ruler body (41) has a scale mark line (411); The first clamping plate (42) is rotatably connected to the ruler body (41); The second clamping plate (43) is rotatably connected to the ruler body (41), and the second clamping plate (43) forms a sliding fit with the ruler body (41) through a sliding structure.

9. The stretch film with a multifunctional mandrel according to claim 8, characterized in that: The ruler body (41) is provided with a transverse sliding groove (412), and the second clamping plate (43) is provided with a guide sliding block (44); The guide slider (44) comprises a rotating shaft section (441) and limiting end surfaces (442) located at both ends of the rotating shaft section (441); the rotating shaft section (441) is slidably arranged in the transverse slide groove (412) and can move along the transverse slide groove (412); and the vertical dimension of the limiting end surface (442) is larger than the vertical dimension of the transverse slide groove (412), so that the rotating shaft section (441) and the transverse slide groove (412) can be anti-separated.

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