A dustproof cutter for sealing film

Abstract

This utility model discloses a dustproof cutter for sealing film, including a sealing box, a cutting base, and a cutting plate. A sealing film roll is rotatably mounted inside the sealing box. A transversely extending strip-shaped opening is provided on the side wall of the sealing box, through which the sealing film drawn from the sealing film roll passes. The cutting plate is located below the strip-shaped opening, extends along the opening, and is fixed to the outside of the sealing box. A cutting blade is located above the cutting plate, with one end hinged to one end of the cutting plate. The cutting blade has a cutting blade seat for pressing against the upper side of the cutting plate and sealing the outside of the strip-shaped opening, and a cutting blade located on the lower outer side of the cutting blade seat and cooperating with the outer side of the cutting plate to cut the sealing film. This utility model can more thoroughly prevent dust from entering the sealing film, further improving the cleanliness of the sealing film.

Description

Technical Field

[0001] This utility model relates to the field of sealing film cutting technology, specifically to a sealing film dustproof cutter. Background Technology

[0002] Laboratory sealing film is an important consumable used to seal laboratory containers and prevent sample evaporation, contamination, and leakage. It is usually in roll form and needs to be cut to the required length using a sealing film cutter.

[0003] Currently, there are two types of sealing film cutters on the market: external and internal. External sealing film cutters result in the sealing film being exposed to the outside and contaminated for a long time. Internal sealing film cutters place the sealing film inside the sealing box, with the sealing film extending out from a strip on the side wall of the sealing box. Although this has a certain dust and contamination prevention effect, dust can still enter the sealing box through the strip and contaminate the sealing film inside the sealing box. Therefore, it cannot completely prevent dust and is not suitable for sealing laboratory containers with high cleanliness requirements. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a sealing film dustproof cutter, so as to enable it to more thoroughly prevent dust from the sealing film and further improve the cleanliness of the sealing film.

[0005] This utility model provides a dustproof cutter for sealing film, comprising:

[0006] A sealing box, wherein a sealing film roll is rotatably installed inside the sealing box, and a strip-shaped opening extending laterally is provided on the side wall of the sealing box, through which the sealing film drawn from the sealing film roll passes;

[0007] A cutting base is provided on the lower side of the strip opening, extends along the strip opening, and is fixed to the outside of the sealing box;

[0008] A cutting blade is disposed on the upper side of the cutting base, with one end of the cutting blade hinged to one end of the cutting base. The cutting blade has a cutting blade seat for pressing on the upper side of the cutting base and sealing the outside of the strip opening, and a cutting blade edge disposed on the lower outer side of the cutting blade seat and cooperating with the outer side of the cutting base to cut the sealing film.

[0009] Furthermore, the sealing box includes a box body with an opening at the top and a box cover that can open or close the opening on the box body. The rear part of the box cover is hinged to the box body, and the front part of the box cover can be flipped up and down. A sealing film roll mounting bracket is provided on the inner side of the box cover, and the sealing film roll is mounted on the sealing film roll mounting bracket.

[0010] Furthermore, the sealing film roll mounting bracket includes a support portion vertically fixed to the inside of the box cover, and a transverse extension rod spaced apart from the box cover and fixed at one end to the support portion, wherein the sealing film roll is rotatably mounted on the transverse extension rod.

[0011] Furthermore, the opening on the box body is a slanted opening that is lower in the front and higher in the back, and the strip-shaped opening is located on the side wall of the rear side of the box body.

[0012] Furthermore, it also includes:

[0013] An elastic element is provided to provide an upward rotating force for the cutting blade to open;

[0014] A locking mechanism is used to lock the cutting blade when it is closed with the cutting base.

[0015] Furthermore, the elastic element is a torsion spring, the hinge end of the cutting blade is provided with a downwardly protruding hinge arm, the side end of the cutting base is provided with a hinge seat, the hinge arm is mounted on the hinge seat through a hinge shaft, the middle part of the hinge arm is provided with a torsion spring mounting groove, the side of the torsion spring mounting groove away from the cutting base is provided with a support block, the torsion spring is provided with a torsion spring mounting groove and is sleeved on the hinge shaft, and the support leg of the torsion spring is supported between the side end of the cutting base and the support block.

[0016] Furthermore, the locking mechanism includes a lock housing, a locking pin, a cam, and an operating arm;

[0017] The locking housing is fixed to the free end of the cutting blade and close to the side wall of the sealing box;

[0018] The locking pin is slidably installed in the lock housing along the side wall of the sealing box near the cutting blade. The side of the lock housing near the sealing box has a locking pin protrusion hole. The outer periphery of the locking pin has a retaining ring. The locking pin is fitted with a compression spring that supports the retaining ring and the side wall of the lock housing near the sealing box. The side wall of the sealing box near the cutting blade has a locking hole that allows the locking pin to be inserted and aligns with the locking pin protrusion hole when the cutting blade and the cutting base are closed.

[0019] The cam is rotatably installed inside the lock housing. The axle on one side of the cam passes through the lock housing and is fixedly connected to the operating arm. The outer circumferential surface of the cam abuts against the end of the locking pin away from the sealing box, so that by rotating the cam, one end of the locking pin can be driven to pass through or retract into the locking pin through hole.

[0020] Furthermore, when the operating arm rotates to the upward position, the cam drives the locking pin to pass through the locking pin outlet hole. When the operating arm rotates to the side away from the sealing box, the compression spring drives the locking pin to retract into the locking pin outlet hole. At this time, the bottom wall of the lock case is limited by the cam to prevent the operating arm from continuing to rotate downward.

[0021] The beneficial effects of this utility model are:

[0022] The sealing film roll of this utility model is installed in a sealing box. The sealing film on the sealing film roll is led out from the strip opening. When cutting, first open the cutting knife, then pull the sealing film out of the strip opening to the required length, and then press down the cutting knife. The cutting blade of the cutting knife cooperates with the outer side of the cutting base to cut the sealing film.

[0023] Because the sealing film roll is placed inside the sealed box, it prevents the sealing film roll from being exposed and contaminated. After cutting, the cutting blade holder presses the protruding sealing film onto the cutting base, preventing the sealing film from retracting into the sealed box from the strip opening. At this time, the cutting blade holder blocks the strip opening on the side wall of the sealed box, preventing dust from entering the sealed box from the strip opening. This can more thoroughly prevent dust from entering the sealing box and further improve the cleanliness of the sealing film. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is an assembly diagram of the sealing film dustproof cutter when the cutting blade is closed, according to an embodiment of this utility model.

[0026] Figure 2 This is an exploded view of the sealing film dustproof cutter according to an embodiment of the present invention;

[0027] Figure 3 This is a vertical sectional view of the middle part of the sealing film dustproof cutter in an embodiment of this utility model when the cutting blade is closed;

[0028] Figure 4 This is a schematic diagram showing the cutting blade in an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the box lid opening according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the torsion spring installation according to an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the internal structure of the locking mechanism when the operating arm rotates to the upward position according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of the locking mechanism when the operating arm rotates to the side away from the sealing box, according to an embodiment of the present invention.

[0033] Reference numerals: 100-Sealing box; 110-Strip opening; 120-Box body; 130-Box cover; 140-Sealing film roll mounting bracket; 141-Support part; 142-Transverse extension rod; 150-Lock hole; 200-Cutting base; 210-Hinge seat; 300-Cutting knife; 310-Cutting knife holder; 320-Cutting blade; 330-Hinge arm; 331-Hinge shaft; 332-Torsion spring mounting groove; 333-Support block; 400-Torsion spring; 500-Locking mechanism; 510-Lock housing; 511-Lock pin protrusion hole; 520-Lock pin; 521-Retaining ring; 530-Cam; 540-Operating arm; 550-Compression spring; 600-Sealing film roll. Detailed Implementation

[0034] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0035] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0036] like Figures 1-8 As shown in the figure, this utility model embodiment provides a sealing film dustproof cutter, including a sealing box 100, a cutting base 200 and a cutting blade 300.

[0037] A sealing film roll 600 is rotatably installed inside the sealing box 100. A strip-shaped opening 110 extending laterally is provided on the side wall of the sealing box 100. The sealing film drawn from the sealing film roll 600 passes through the strip-shaped opening 110.

[0038] The cutting base 200 is located on the lower side of the slot 110, extends along the slot 110 and is fixed to the outside of the sealing box 100.

[0039] The cutting blade 300 is located on the upper side of the cutting base 200, with one end of the cutting blade 300 hinged to one end of the cutting base 200. The cutting blade 300 has a cutting blade seat 310 for pressing against the upper side of the cutting base 200 and sealing the outside of the strip opening 110, and a cutting blade 320 located on the lower outer side of the cutting blade seat 310 and cooperating with the outer side of the cutting base 200 to cut the sealing film.

[0040] The sealing film roll 600 of this utility model is installed inside the sealing box 100. The sealing film on the sealing film roll 600 is drawn out from the strip opening 110. When cutting, as... Figure 4As shown, first open the cutter 300, then pull the sealing film out of the strip opening 110 to the required length, and then press down the cutter 300. The cutting blade 320 of the cutter 300 cooperates with the outer side of the cutting base 200 to cut the sealing film.

[0041] like Figure 3 As shown, since the sealing film roll 600 is located inside the sealing box 100, it can prevent the sealing film roll 600 from being exposed to the outside and contaminated. After cutting, the cutting blade seat 310 of the cutting blade 300 presses the protruding sealing film onto the cutting base 200, which can prevent the sealing film from retracting into the sealing box 100 from the strip opening 110. At this time, the cutting blade seat 310 of the cutting blade 300 blocks the strip opening 110 on the side wall of the sealing box 100, which can prevent dust from entering the sealing box 100 from the strip opening 110. This can more thoroughly prevent dust from the sealing film and further improve the cleanliness of the sealing film.

[0042] In some embodiments, such as Figure 5 As shown, the sealing box 100 includes a box body 120 with an opening at the top and a box cover 130 that can open or close the opening on the box body 120. The rear part of the box cover 130 is hinged to the box body 120, and the front part of the box cover 130 can be flipped up and down. A sealing film roll mounting bracket 140 is provided on the inner side of the box cover 130, and the sealing film roll 600 is mounted on the sealing film roll mounting bracket 140.

[0043] By providing a sealing film roll mounting bracket 140 on the inside of the box cover 130, when the box cover 130 is opened, the sealing film roll mounting bracket 140 can be rotated to the outside of the box body 120, making it easy to install the sealing film roll 600 on the sealing film roll mounting bracket 140. When the box cover 130 is closed, the sealing film roll 600 installed on the sealing film roll mounting bracket 140 can be rotated to the inside of the box body 120, making the installation of the sealing film roll 600 convenient.

[0044] To facilitate the installation of sealing film on the sealing film roll mounting frame 140, the sealing film roll mounting frame 140 includes a support part 141 that is vertically fixed to the inside of the box cover 130, and a transverse extension rod 142 that is spaced apart from the box cover 130 and fixed at one end to the support part 141. The sealing film roll 600 is rotatably mounted on the transverse extension rod 142.

[0045] Optionally, the opening on the box body 120 is a slanted opening that is lower in the front and higher in the back, and the strip opening 110 is located on the side wall of the rear side of the box body 120. With this design, when the lid 130 is flipped up, there is more space in the front of the box body 120, which provides sufficient space for installing the sealing film roll 600.

[0046] In some embodiments, the sealing film dust cutter further includes an elastic element and a locking mechanism 500, the elastic element being used to provide an upward rotating force for the cutter 300 to open, and the locking mechanism 500 being used to lock the cutter 300 when it is closed with the cutting base 200.

[0047] like Figure 1 As shown, when the cutting blade 300 is closed, it can be locked by the locking mechanism 500 to prevent the cutting blade 300 from being accidentally opened. Figure 2 As shown, during cutting, the locking mechanism 500 is unlocked, and the cutting blade 300 automatically pops up and opens under the action of the elastic element. When the sealing film is pulled out, the cutting blade 300 is pressed down again to complete the cutting. The operation is convenient.

[0048] In one specific embodiment, refer to Figure 6 The elastic element is a torsion spring 400. The hinge end of the cutting blade 300 is provided with a downwardly protruding hinge arm 330. The side end of the cutting base 200 is provided with a hinge seat 210. The hinge arm 330 is mounted on the hinge seat 210 through a hinge shaft 331. The middle part of the hinge arm 330 is provided with a torsion spring mounting groove 332. The side of the torsion spring mounting groove 332 away from the cutting base 200 is provided with a support block 333. The torsion spring 400 is located in the torsion spring mounting groove 332 and is sleeved on the hinge shaft 331. The support leg of the torsion spring 400 is supported between the side end of the cutting base 200 and the support block 333. In this way, the cutting blade 300 can automatically spring up under the action of the torsion spring 400. The structure is simple and reliable.

[0049] In one specific embodiment, refer to Figure 7 and Figure 8 The locking mechanism 500 includes a lock housing 510, a locking pin 520, a cam 530, and an operating arm 540.

[0050] The locking case 510 is fixed to the free end of the cutting blade 300 and close to the side wall of the sealing box 100.

[0051] The locking pin 520 is slidably installed in the lock housing 510 along the side wall of the sealing box 100 near the cutting blade 300. The lock housing 510 is provided with a locking pin protrusion hole 511 on the side near the sealing box 100. A retaining ring 521 is provided on the outer periphery of the locking pin 520. A compression spring 550 is provided on the outer sleeve of the locking pin 520, which is supported between the retaining ring 521 and the side wall of the lock housing 510 near the sealing box 100. The side wall of the sealing box 100 near the cutting blade 300 is provided with a locking hole 150 for the locking pin 520 to be inserted and aligned with the locking pin protrusion hole 511 when the cutting blade 300 and the cutting base 200 are closed.

[0052] The cam 530 is rotatably installed inside the lock housing 510. The axle on one side of the cam 530 passes through the lock housing 510 and is fixedly connected to the operating arm 540. The outer peripheral surface of the cam 530 abuts against the end of the locking pin 520 away from the sealing box 100, so that by rotating the cam 530, one end of the locking pin 520 can be driven to pass through or retract into the locking pin passage hole 511.

[0053] Preferably, when the operating arm 540 rotates to the upward position, the cam 530 drives the locking pin 520 to pass through the locking pin outlet hole 511. When the operating arm 540 rotates to the side away from the sealing box 100, the compression spring 550 drives the locking pin 520 to retract into the locking pin outlet hole 511. At this time, the bottom wall of the lock housing 510 is limited by the cam 530 to prevent the operating arm 540 from continuing to rotate downward.

[0054] like Figure 7 As shown, when locked, the operating arm 540 rotates upwards, and the cam 530 pushes the locking pin 520 through the locking pin protrusion hole 511 and inserts it into the locking hole 150 on the side wall of the sealing box 100, thereby locking the cutting blade 300. Figure 8 As shown, when the sealing film needs to be cut, the operating arm 540 is rotated to the side away from the sealing box 100. Under the action of the compression spring 550, the locking pin 520 is pushed out of the locking hole 150 and back into the locking pin protrusion hole 511 to release the lock on the cutting blade 300. After the cutting blade 300 is unlocked, it automatically opens under the action of the torsion spring 400 (as shown). Figure 4 As shown), at this time, the bottom wall of the lock case 510 limits the clockwise rotation of the cam 530 (as shown). Figure 8 As shown), the operating arm 540 cannot continue to rotate downwards. In this way, the operating arm 540 can drive the cutting blade 300 to press down for cutting, which is convenient to operate. When it is necessary to lock the cutting blade 300 again, use one hand to press the cutting blade 300 on the cutting base 200, and use the other hand to lift the operating arm 540 upwards.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A dustproof cutter for sealing film, characterized in that, include: A sealing box, in which a sealing film roll is rotatably installed, and a strip-shaped opening extending laterally is provided on the side wall of the sealing box, through which the sealing film drawn from the sealing film roll passes; A cutting base is provided on the lower side of the strip opening, extends along the strip opening, and is fixed to the outside of the sealing box; A cutting blade is disposed on the upper side of the cutting base, with one end of the cutting blade hinged to one end of the cutting base. The cutting blade has a cutting blade seat for pressing on the upper side of the cutting base and sealing the outside of the strip opening, and a cutting blade edge disposed on the lower outer side of the cutting blade seat and cooperating with the outer side of the cutting base to cut the sealing film.

2. The sealing film dustproof cutter according to claim 1, characterized in that, The sealing box includes a box body with an opening at the top and a box cover that can open or close the opening on the box body. The rear part of the box cover is hinged to the box body, and the front part of the box cover can be flipped up and down. A sealing film roll mounting bracket is provided on the inner side of the box cover, and the sealing film roll is mounted on the sealing film roll mounting bracket.

3. The sealing film dustproof cutter according to claim 2, characterized in that, The sealing film roll mounting bracket includes a support portion vertically fixed to the inside of the box cover, and a transverse extension rod spaced apart from the box cover and fixed at one end to the support portion. The sealing film roll is rotatably mounted on the transverse extension rod.

4. The sealing film dustproof cutter according to claim 2, characterized in that, The opening on the box body is a sloping opening that is lower in the front and higher in the back, and the strip-shaped opening is located on the side wall of the rear side of the box body.

5. The sealing film dustproof cutter according to claim 1, characterized in that, Also includes: An elastic element is provided to provide an upward rotating force for the cutting blade to open; A locking mechanism is used to lock the cutting blade when it is closed with the cutting base.

6. The sealing film dustproof cutter according to claim 5, characterized in that, The elastic element is a torsion spring. The hinge end of the cutting blade is provided with a downwardly protruding hinge arm. The side end of the cutting base is provided with a hinge seat. The hinge arm is mounted on the hinge seat through a hinge shaft. The middle part of the hinge arm is provided with a torsion spring mounting groove. The side of the torsion spring mounting groove away from the cutting base is provided with a support block. The torsion spring is provided with a torsion spring mounting groove and is sleeved on the hinge shaft. The support leg of the torsion spring is supported between the side end of the cutting base and the support block.

7. The sealing film dustproof cutter according to claim 5, characterized in that, The locking mechanism includes a lock housing, a locking pin, a cam, and an operating arm; The locking case is fixed to the free end of the cutting blade and close to the side wall of the sealing box; The locking pin is slidably installed in the lock housing along the side wall of the sealing box near the cutting blade. The side of the lock housing near the sealing box has a locking pin protrusion hole. The outer periphery of the locking pin has a retaining ring. The locking pin is fitted with a compression spring that supports the retaining ring and the side wall of the lock housing near the sealing box. The side wall of the sealing box near the cutting blade has a locking hole that allows the locking pin to be inserted and aligns with the locking pin protrusion hole when the cutting blade and the cutting base are closed. The cam is rotatably installed inside the lock housing. The axle on one side of the cam passes through the lock housing and is fixedly connected to the operating arm. The outer circumferential surface of the cam abuts against the end of the locking pin away from the sealing box, so that by rotating the cam, one end of the locking pin can be driven to pass through or retract into the locking pin through hole.

8. The sealing film dust cutter according to claim 7, characterized in that, When the operating arm rotates to the upward position, the cam drives the locking pin to pass through the locking pin outlet hole. When the operating arm rotates to the side away from the sealing box, the compression spring drives the locking pin to retract into the locking pin outlet hole. At this time, the bottom wall of the lock case is limited by the cam to prevent the operating arm from continuing to rotate downward.

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