Art knife capable of cutting safely

Abstract

The utility model discloses a safe cutting art knife which comprises a blade groove and a shell, the blade groove is wrapped by the shell, the front end of the shell is connected with an installation head, the installation head is connected with a protection head by penetrating through a rotating shaft, a blade seat is arranged in the blade groove, a pressing sliding block is installed on the blade seat, and the pressing sliding block is connected with the protection head. A limiting block is arranged in the pressing sliding block, a telescopic spring a is arranged between the limiting block and the pressing sliding block, a cutting blade is installed on the blade base, the tail end of the blade base is connected with one end of an extension spring, and the other end of the extension spring is connected with a spring containing shell. According to the art knife capable of cutting safely, after a perfect art knife is used, the blade seat can retract under the action of the extension spring, and the protection head can rotate and reset under the influence of the elastic force of the reset spring, so that the cutting blade can be automatically retracted after the art knife is used.

Description

Technical Field

[0001] The utility model relates to the technical field of utility knives, in particular to a safe cutting utility knife. Background Art

[0002] Utility knives, also known as carving knives or wallpaper knives, are a type of knife used for art and handicrafts. They are mainly used to cut soft objects. They are usually made of a plastic handle and a blade, and are pull-out structures. A few have metal handles, and the blades are usually beveled. If they are blunt, they can be broken along the line of the blade, resulting in a new blade, which is convenient to use. Utility knives come in a variety of sizes.

[0003] After searching, the Chinese utility model with patent number: 202022204273.1 is a safety utility knife for preventing accidental injury, which specifically discloses a safety utility knife for preventing accidental injury, including a head, two groups of sheath bodies are installed on one side of the head, a card plate is installed at the front between the two groups of sheath bodies, a plurality of card teeth are arranged at the bottom of the front and rear ends of the card plate, a tail plate is installed on one side of the sheath body, a slider is installed at one side at the front end of the card plate, a fixed protrusion is installed at one side at the rear end of the slider, a blade is installed at one side at the periphery of the fixed protrusion, a back plate is installed at the rear end between the two groups of sheath bodies, a protective shell is arranged at the top at the front and rear ends of the blade, sliding strips are installed at the rear end and the upper end of the protective shell, and sliding grooves are provided at the lower end of the sheath body located at the upper end and the front end of the back plate.

[0004] The common anti-accidental injury safety utility knife on the market has no storage design for the front end head after disassembly, which is easy to lose. In addition, the user is likely to retract the blade after using the utility knife, which poses a certain risk. To address the above problems, an innovative design is made based on the original utility knife. Utility Model Content

[0005] The purpose of the utility model is to provide a safe cutting utility knife to solve the problem mentioned in the above background technology that the common utility knife on the market currently has no storage design after the front end head is disassembled during use, which is easy to be lost. In addition, the user is likely to retract the blade after using the utility knife, which poses certain risks.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a utility knife for safe cutting, comprising a blade slot and a shell, the outer side of the blade slot is wrapped with the shell, and the front end of the shell is connected to the mounting head, the mounting head is connected to the protective head by inserting a rotating shaft, and a reset spring is arranged on the rotating shaft, a blade seat is arranged in the blade slot, and a pressing slider is installed on the blade seat, a telescopic spring b is arranged between the pressing slider and the blade seat, a limiting block is arranged in the pressing slider, and a telescopic spring a is arranged between the limiting block and the pressing slider, a cutting blade is installed on the blade seat, and the cutting blade is located in the blade slot, the end of the blade seat is connected to one end of the tension spring, and the other end of the tension spring is connected to the spring storage shell, and the spring storage shell is installed at the end of the shell.

[0007] Preferably, a plurality of latching teeth are provided in the blade slot, and the blade slot can be engaged with a limiting block provided in the pressing slider through the latching teeth.

[0008] Preferably, the blade slot and the blade seat form a sliding structure.

[0009] Preferably, the front end of the shell is provided with two mounting grooves, and the shell corresponds to two card blocks provided on the micro end of the mounting head through the mounting grooves.

[0010] Preferably, the mounting head and the protective head form a rotating structure by interlacing a rotating shaft, and two ends of a return spring arranged on the rotating shaft are respectively connected to the mounting head and the protective head.

[0011] Preferably, a slide groove a is provided in the blade seat, and the blade seat forms a sliding structure with the pressing slider through the slide groove a.

[0012] Preferably, a clamping column is provided at one end of the blade seat.

[0013] Preferably, a slide groove c is provided in the pressing slider, and the pressing slider forms a sliding structure with the limiting block through the slide groove c, and the limiting block also forms a sliding structure with the slide groove b in the blade seat.

[0014] Preferably, a storage groove is provided in the spring storage shell.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility knife for safe cutting is

[0016] 1. After using the perfect utility knife, the blade seat will retract under the action of the tension spring, and the protective head will also rotate and reset under the influence of the elastic force of the reset spring, so that the cutting blade of the utility knife can be automatically recovered after use, protecting the safety of the user;

[0017] 2. The position of the blade seat is limited by the engagement of the locking teeth and the limit block, thereby offsetting the tensile force provided by the tension spring, so that the user does not need to provide thrust all the time when pushing the blade seat forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall blade sliding structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the overall explosion structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the overall explosion structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the overall front view cross-sectional structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the connection structure between the blade seat and the pressing slider of the utility model;

[0024] Figure 7 The utility model is a schematic diagram of the structure of a utility knife that can replace a cutting blade.

[0025] In the figure: 1. blade slot; 101. latch tooth; 2. housing; 201. mounting slot; 3. mounting head; 301. clamping block; 4. protective head; 5. rotating shaft; 6. reset spring; 7. blade seat; 701. slide slot a; 702. slide slot b; 703. clamping column; 8. pressing slider; 801. slide slot c; 9. limit block; 10. telescopic spring a; 11. telescopic spring b; 12. cutting blade; 13. tension spring; 14. spring storage shell; 1401. storage slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-7The utility model provides a technical solution: a utility knife for safe cutting, comprising a blade slot 1 and a shell 2, the outer surface of the blade slot 1 is wrapped with the shell 2, and the front end of the shell 2 is connected to the mounting head 3, the mounting head 3 is connected to the protective head 4 by inserting a rotating shaft 5, and a reset spring 6 is arranged on the rotating shaft 5, a blade seat 7 is arranged in the blade slot 1, and a pressing slider 8 is installed on the blade seat 7, a telescopic spring b11 is arranged between the pressing slider 8 and the blade seat 7, a limiting block 9 is arranged in the pressing slider 8, and a telescopic spring a10 is arranged between the limiting block 9 and the pressing slider 8, a cutting blade 12 is installed on the blade seat 7, and the cutting blade 12 is located in the blade slot 1, the end of the blade seat 7 is connected to one end of a tension spring 13, and the other end of the tension spring 13 is connected to a spring storage shell 14, and the spring storage shell 14 is installed at the end of the shell 2;

[0028] A plurality of latch teeth 101 are arranged in the blade slot 1, and the blade slot 1 can be engaged with the limit block 9 arranged in the pressing slider 8 through the latch teeth 101, which is conducive to the latch teeth 101 and the limit block 9 being engaged with each other to limit the position of the blade seat 7;

[0029] The blade slot 1 and the blade seat 7 form a sliding structure, which is conducive to the blade seat 7 being able to slide and move in the blade slot 1;

[0030] The front end of the housing 2 is provided with two mounting grooves 201, and the housing 2 corresponds to the two clamping blocks 301 provided at the micro-end of the mounting head 3 through the mounting grooves 201, which is conducive to removing the mounting head 3 when replacing the cutting blade 12, so as to facilitate replacement;

[0031] The mounting head 3 forms a rotating structure by interlacing the rotating shaft 5 and the protective head 4, and the two ends of the return spring 6 arranged on the rotating shaft 5 are respectively connected to the mounting head 3 and the protective head 4, which is conducive to the protective head 4 rotating and resetting under the influence of the elastic force of the return spring 6 after the cutting blade 12 retracts;

[0032] A slide groove a701 is provided in the blade seat 7, and the blade seat 7 forms a sliding structure with the pressing slider 8 through the slide groove a701, which is conducive to the pressing slider 8 being able to slide up and down in the blade seat 7;

[0033] A clamping column 703 is provided at one end of the blade seat 7, which is conducive to installing the cutting blade 12 through the clamping column 703;

[0034] A slide groove c801 is provided in the pressing slider 8, and the pressing slider 8 forms a sliding structure with the limit block 9 through the slide groove c801, and the limit block 9 also forms a sliding structure with the slide groove b702 of the pressing slider 8, which is conducive to the limit block 9 being able to slide on the pressing slider 8;

[0035] A storage groove 1401 is provided in the spring storage housing 14 , which is beneficial for providing a storage place for the tension spring 13 .

[0036] Working principle: According to Figure 1-7 When using the utility knife, the operator first presses the pressing slider 8 to make the pressing slider 8 slide downward, so that the limit block 9 in the pressing slider 8 is at the same horizontal position as the latch tooth 101, forming a one-way sliding engagement structure. Then the operator slides the entire blade seat 7 forward. Since the latch tooth 101 and the limit block 9 are both provided with inclined surfaces, the latch tooth 101 and the limit block 9 will not engage with each other when the blade seat 7 slides forward, and the latch tooth 101 and the limit block 9 will engage with each other when the blade seat 7 slides backward, thereby limiting the position of the blade seat 7, thereby offsetting the tensile force provided by the tensile spring 13. Then, when the front end of the cutting blade 12 touches the protective head 4, the protective head 4 rotates open under the thrust of the operator, thereby allowing the cutting blade 12 to move forward. The sheet 12 is exposed, and when the cutting operation is completed, the operator only needs to release the pressing slider 8, so that the telescopic spring b11 will lift the pressing slider 8, so that the limit block 9 and the locking tooth 101 are in a non-contact state. This is because there is no limit block 9 engaged, so that the blade seat 7 will retract under the action of the tension spring 13, and the protective head 4 will also rotate and reset under the influence of the elastic force of the reset spring 6, so that the cutting blade 12 of the utility knife can be automatically recovered after use. When the cutting blade 12 needs to be replaced, it is only necessary to remove the mounting head 3 and push the blade seat 7 to the front end to replace the cutting blade 12. The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0037] 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 utility knife for safe cutting, comprising a blade slot (1) and a housing (2), characterized in that: The blade slot (1) is wrapped with a shell (2), and the front end of the shell (2) is connected to the mounting head (3), the mounting head (3) is connected to the protective head (4) by inserting a rotating shaft (5), and the rotating shaft (5) is provided with a return spring (6), a blade seat (7) is provided in the blade slot (1), and a pressing slider (8) is installed on the blade seat (7), and a telescopic spring b (11) is provided between the pressing slider (8) and the blade seat (7), and the pressing slider is provided with a return spring (6) to move the blade seat (7) and the blade seat (7). A limit block (9) is arranged in the block (8), and a telescopic spring a (10) is arranged between the limit block (9) and the pressing slider (8); a cutting blade (12) is installed on the blade seat (7), and the cutting blade (12) is located in the blade slot (1); the end of the blade seat (7) is connected to one end of a tension spring (13), and the other end of the tension spring (13) is connected to a spring storage shell (14), and the spring storage shell (14) is installed at the end of the housing (2).

2. A utility knife for safe cutting according to claim 1, characterized in that: A plurality of latching teeth (101) are arranged in the blade slot (1), and the blade slot (1) can be engaged with a limit block (9) arranged in the pressing slide block (8) via the latching teeth (101).

3. A utility knife for safe cutting according to claim 1, characterized in that: The blade groove (1) and the blade seat (7) form a sliding structure.

4. A utility knife for safe cutting according to claim 1, characterized in that: The front end of the housing (2) is provided with two installation slots (201), and the housing (2) corresponds to two clamping blocks (301) provided at the micro-end of the installation head (3) through the installation slots (201).

5. The utility knife for safe cutting according to claim 1, characterized in that: The mounting head (3) forms a rotating structure by interlacing a rotating shaft (5) and a protective head (4), and the two ends of a return spring (6) arranged on the rotating shaft (5) are respectively connected to the mounting head (3) and the protective head (4).

6. The utility knife for safe cutting according to claim 1, characterized in that: A sliding groove a (701) is provided in the blade seat (7), and the blade seat (7) forms a sliding structure with the pressing slider (8) through the sliding groove a (701).

7. The utility knife for safe cutting according to claim 1, characterized in that: A clamping column (703) is provided at one end of the blade seat (7).

8. The utility knife for safe cutting according to claim 1, characterized in that: The pressing slider (8) is provided with a sliding groove c (801), and the pressing slider (8) forms a sliding structure with the limiting block (9) through the sliding groove c (801), and the limiting block (9) also forms a sliding structure with the sliding groove b (702) in the blade seat (7).

9. The utility knife for safe cutting according to claim 1, characterized in that: A storage groove (1401) is provided in the spring storage shell (14).

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