Telescopic knife with push type switch

Abstract

The telescopic knife comprises a first knife shell, a second knife shell is clamped outside the first knife shell, a knife rest is slidably connected inside the first knife shell, a blade is installed on the inner side of the knife rest, an extension spring is arranged between the knife rest and the first knife shell, one end of the extension spring is fixedly connected with the knife rest, and the other end of the extension spring is fixedly connected with the second knife shell. The other end of the extension spring is fixedly connected with the first knife shell, and a pressing handle is rotationally connected to the position, located below the extension spring, in the first knife shell. Belongs to the technical field of telescopic knives. According to the telescopic knife with the pressing type switch, an opening is formed between the first knife shell and the second knife shell and used for allowing a blade to go in and out, and a first blocking piece is located in the opening and used for blocking the opening and preventing dust from entering the interior from the opening; and dustproof protection is conducted on the interiors of the first knife shell and the second knife shell, and the situation that assemblies such as the shear fork rod are clamped by dust and dirt is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic knives, and more specifically to a telescopic knife with a push-type switch. Background Art

[0002] A cutting tool is a tool used for cutting in mechanical manufacturing, also known as a cutting tool; it can be extended, stretched and contracted.

[0003] A Chinese patent discloses a telescopic knife with patent number CN201820335424.7. When the telescopic knife is used, the blade can be automatically retracted before the drive structure is released, thereby avoiding the safety hazard and the risk of damaging the blade when the user forgets to release the drive structure, and increasing the safety of the telescopic knife. However, there are still certain problems. The telescopic knife does not have a dustproof function, and dust can easily enter the inside of the knife shell, causing the blade to be stuck. In addition, in order to prevent the pressing part from being accidentally touched and causing the blade to automatically extend, the telescopic knife is provided with a slider to lock the pressing part, and the slider needs to be pushed to unlock it. The movable slider is separated from the pressing piece, so that the pressing piece is located below the knife housing as a whole. When the user holds the knife housing, four fingers will be buckled on the pressing piece, and the user can control the blade to extend by simply holding the pressing piece. However, when the pressing piece is locked, the user needs to push the sliding button, and the sliding button is located on the side of the knife housing, away from the palm of the user. This also results in the user needing to push the sliding button with the other hand to unlock it, which is not conducive to the user's one-handed operation during work, and the continuity is insufficient, and the user cannot immediately unlock the knife housing and then control a series of operations to extend the blade, thereby reducing the convenience of use. Utility Model Content

[0004] The purpose of the utility model is to provide a telescopic knife with a push-type switch to solve the problems raised in the above background technology:

[0005] The user may also use a different method to unlock the knife, as the user may have difficulty in releasing the knife, as the knife may be moved more slowly and the knife may be moved more slowly.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A telescopic knife with a push-type switch comprises a first knife housing, a second knife housing is clamped on the outside of the first knife housing, a knife holder is slidably connected to the inside of the first knife housing, a blade is installed on the inner side of the knife holder, a tension spring is arranged between the knife holder and the first knife housing, one end of the tension spring is fixedly connected to the knife holder, and the other end of the tension spring is fixedly connected to the first knife housing, a pressing handle is rotatably connected to the inside of the first knife housing and located below the tension spring, a scissor rod is arranged on the inner side of the pressing handle, one end of the scissor rod is rotatably connected to the knife holder, and the other end of the scissor rod is rotatably connected to a connecting rod, the connecting rod is rotatably connected to the pressing handle, and when a user presses the pressing handle When pressed, the pressing handle will pull the scissor rod through the connecting rod, and the scissor rod will push the knife holder to extend the blade, and the tension spring is used to drive the blade to reset. The first baffle is rotatably connected to the side of the interior of the first knife housing away from the tension spring. An opening is provided between the first knife housing and the second knife housing, and the opening is used for the blade to enter and exit. The first baffle is located inside the opening and is used to block the opening to prevent dust from entering the interior through the opening. The first baffle is connected to the first knife housing and the second knife housing through a rotating shaft. Under the action of the rotating shaft, the first baffle can rotate, and a torsion spring is provided between one end of the rotating shaft and the first knife housing. The torsion of the torsion spring can drive the first baffle pushed away by the blade to reset.

[0008] Preferably, a card block is slidably connected to the inside of the first blade housing, a spring sheet is fixedly connected to the inside of the first blade housing and on one side of the card block, the spring sheet is fitted with the card block, a card slot is provided on the upper surface of the blade, the card slot and the card block are used in conjunction with the card block, a button is slidably connected to the inside of the second blade housing, a compression spring is provided between the button and the second blade housing, when the blade is pushed out, the card block is squeezed by the elastic force of the spring sheet and automatically fits with the card slot on the blade, thereby using the card block to position the extended blade, avoiding the situation where the blade is automatically retracted, and preventing the user from affecting the normal use of the blade.

[0009] Preferably, a sliding button is slidably connected inside the first knife housing and above the knife holder, and a stopper is fixedly connected to the bottom of the sliding button. The stopper is used in conjunction with a pressing handle, and second stoppers are fixedly connected to the corresponding two side edges of the sliding button. When the user pushes the sliding button, the sliding button can drive the stopper to block above the pressing handle and press against it. At this time, the pressing handle cannot rotate even if it is pressed by external force, thereby achieving the purpose of locking the pressing handle and preventing the blade from automatically extending due to accidental touch, which is safer and more reliable.

[0010] Preferably, a protrusion is fixedly connected to the top of the sliding button, and there are four protrusions in total. The four protrusions are equidistantly distributed, and the protrusions can increase the contact area between the user's hand and the sliding button, thereby increasing the friction between the user's hand and the sliding button, making it less likely for the sliding button to slip when the user pushes it, which is conducive to the user to push the sliding button better.

[0011] Preferably, the second baffle is an L-shaped structure, and the user can push the sliding button back and forth. When the sliding button moves back and forth, the two second baffles on both sides will move simultaneously. The second baffles are tightly fitted with the inner walls of the first knife shell and the second knife shell, and can seal the gap between the sliding button and the first knife shell and the second knife shell. At the same time, the L-shaped structure enables the two second baffles to block the sliding button itself, thereby preventing dust from entering, and avoiding the situation where components such as the scissor rods are stuck by dust and dirt.

[0012] Preferably, the outer wall of the blade fits with the inner wall of the blade holder, the blade is installed on the blade holder, and the blade fits tightly with the blade holder after installation, which can ensure that the blade will not shake during use and avoid affecting the normal use of the blade.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1) When using the telescopic knife with a push-type switch, the user holds the first blade housing and the second blade housing with one hand, presses the thumb on the slide button and pushes it to complete the unlocking, and then holds and presses the handle to control the blade to extend. The user can complete the unlocking and blade extension operations with one hand, which is more consistent and can be used right away, thereby improving the convenience of use.

[0015] 2) When the telescopic knife with a push-type switch is in use, an opening is provided between the first knife housing and the second knife housing, and the opening is used for the blade to enter and exit. The first baffle is located inside the opening and is used to block the opening to prevent dust from entering the interior from the opening. The second baffle cooperates with the second baffle to block the gap at the slide button, thereby protecting the interior of the first knife housing and the second knife housing from dust and preventing components such as the scissor rod from being stuck by dust and dirt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the blade of the utility model after being extended;

[0017] Figure 2 This is a schematic diagram of the structure of the blade of the utility model before it is extended;

[0018] Figure 3 It is a schematic diagram of the structure of the blade of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the scissor rod of the utility model;

[0020] Figure 5 The structure of the button of the utility model is shown in FIG.

[0021] Explanation of the numbers in the figure: 1. first blade housing; 2. second blade housing; 3. blade holder; 4. blade; 5. extension spring; 6. pressing handle; 7. scissor rod; 8. connecting rod; 9. first baffle; 10. block; 11. spring; 12. slot; 13. button; 14. compression spring; 15. slide button; 16. block; 17. second baffle; 18. bump. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figures 1 to 5 A telescopic knife with a push-type switch comprises a first knife housing 1, a second knife housing 2 is clamped on the outside of the first knife housing 1, a knife holder 3 is slidably connected to the inside of the first knife housing 1, a blade 4 is installed on the inner side of the knife holder 3, a tension spring 5 is arranged between the knife holder 3 and the first knife housing 1, one end of the tension spring 5 is fixedly connected to the knife holder 3, and the other end of the tension spring 5 is fixedly connected to the first knife housing 1, a pressing handle 6 is rotatably connected to the inside of the first knife housing 1 and located below the tension spring 5, a scissors rod 7 is arranged on the inner side of the pressing handle 6, one end of the scissors rod 7 is rotatably connected to the knife holder 3, and the other end of the scissors rod 7 is rotatably connected to a connecting rod 8, and the connecting rod 8 is rotatably connected to the pressing handle 6. When the user presses the pressing handle 6, the pressing handle 6 will pull the scissors rod 7 through the connecting rod 8, and the scissors The rod 7 then pushes the knife holder 3 to extend with the blade 4. During the process, the tension spring 5 will be pulled by the knife holder 3 and become longer, so that the knife holder 3 has a tendency to automatically retract, and the blade 4 is reset by the tension of the tension spring 5. The first baffle 9 is rotatably connected to the side of the first knife housing 1 away from the tension spring 5. An opening is provided between the first knife housing 1 and the second knife housing 2, and the opening is used for the blade 4 to enter and exit. The first baffle 9 is located inside the opening and is used to block the opening to prevent dust from entering the interior from the opening. The first baffle 9 is connected to the first knife housing 1 and the second knife housing 2 through a rotating shaft. Under the action of the rotating shaft, the first baffle 9 can rotate, and a torsion spring is provided between one end of the rotating shaft and the first knife housing 1. The torsion of the torsion spring can drive the first baffle 9 pushed away by the blade 4 to reset.

[0024] Furthermore, a card block 10 is slidably connected inside the first blade housing 1, and a spring piece 11 is fixedly connected inside the first blade housing 1 and on one side of the card block 10, and the spring piece 11 fits with the card block 10. A card slot 12 is provided on the upper surface of the blade 4, and the card slot 12 is used in conjunction with the card block 10. A button 13 is slidably connected inside the second blade housing 2, and a compression spring 14 is arranged between the button 13 and the second blade housing 2. When the blade 4 is pushed out, the card block 10 is squeezed by the elastic force of the spring piece 11 and automatically fits with the card slot 12 on the blade 4, so that the card block 10 is used to position the extended blade 4, avoiding the situation where the blade 4 is automatically retracted, thereby ensuring the normal use of the blade 4 by the user.

[0025] Furthermore, a sliding button 15 is slidably connected inside the first knife housing 1 and above the knife holder 3. A stopper 16 is fixedly connected to the bottom of the sliding button 15. The stopper 16 is used in conjunction with the pressing handle 6. Second stoppers 17 are fixedly connected to the corresponding two side edges of the sliding button 15. When the user pushes the sliding button 15, the sliding button 15 can drive the stopper 16 to block above the pressing handle 6 and press against it. At this time, the pressing handle 6 cannot rotate even if it is pressed by external force, thereby achieving the purpose of locking the pressing handle 6, preventing the blade 4 from automatically extending due to accidental touch, and ensuring safety.

[0026] Furthermore, a protrusion 18 is fixedly connected to the top of the sliding button 15. There are four protrusions 18 in total, and the four protrusions 18 are equidistantly distributed. The protrusions 18 can increase the contact area between the user's hand and the sliding button 15, thereby increasing the friction between the user's hand and the sliding button 15, making it less likely for the sliding button 15 to slip when the user pushes it.

[0027] Furthermore, the second baffle 17 is an L-shaped structure, and the user can push the slide button 15 back and forth. When the slide button 15 moves back and forth, the two second baffles 17 on both sides will move simultaneously. The second baffles 17 are tightly fitted with the inner walls of the first blade housing 1 and the second blade housing 2, and can seal the gap between the slide button 15 and the first blade housing 1 and the second blade housing 2. At the same time, the L-shaped structure enables the two second baffles 17 to block the slide button 15 itself, thereby preventing dust from entering, and then protecting the interior of the first blade housing 1 and the second blade housing 2 from dust, thereby preventing components such as the scissor rod 7 from being stuck by dust and dirt.

[0028] Furthermore, the outer wall of the blade 4 fits with the inner wall of the blade holder 3, and the blade 4 is installed on the blade holder 3. After installation, the blade 4 fits tightly with the blade holder 3, which can ensure that the blade 4 will not shake during use, avoiding affecting the normal use of the blade 4.

[0029] The utility model uses steps as follows: when the telescopic knife with a push-type switch is in use, after the user holds the first knife shell 1 and the second knife shell 2 with one hand, four fingers will be buckled on the push handle 6. Since the push handle 6 is resisted by the block 16 and cannot be pressed, it needs to be unlocked. Therefore, the user can press the thumb on the slide button 15 and push it, so that the block 16 is driven to separate from the push handle 6 through the slide button 15. At this time, the user holds the push handle 6 tightly to drive the push handle 6 to rotate. The push handle 6 drives the scissor rod 7 to extend through the connecting rod 8, and the scissor rod 7 drives the knife holder 3 and the blade 4 to move outward, so that The blade 4 is extended until the card slot 12 on the blade 4 is engaged with the card block 10. At this time, the blade 4 is locked, and during the process of the blade 4 being extended, it will abut against the first baffle 9 and drive the first baffle 9 to rotate and open. The first baffle 9 can prevent dust from entering, thereby protecting the internal components and preventing the blade 4 from being stuck by dust. After use, pressing the button 13 can drive the card block 10 to disengage from the card slot 12. At this time, the blade 4 is retracted under the pulling force of the tension spring 5. The user can complete the unlocking and extending operation of the blade 4 with one hand, and the consistency is stronger. It can be used right away, which improves the convenience of use.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A telescopic knife with a push-type switch, comprising a first knife housing (1), wherein a second knife housing (2) is clamped to the outside of the first knife housing (1), characterized in that: The first knife housing (1) is slidably connected to a knife holder (3) inside, a blade (4) is installed on the inner side of the knife holder (3), a tension spring (5) is arranged between the knife holder (3) and the first knife housing (1), one end of the tension spring (5) is fixedly connected to the knife holder (3), and the other end of the tension spring (5) is fixedly connected to the first knife housing (1), a pressing handle (6) is rotatably connected inside the first knife housing (1) and below the tension spring (5), a scissor rod (7) is arranged on the inner side of the pressing handle (6), one end of the scissor rod (7) is rotatably connected to the knife holder (3), and the other end of the scissor rod (7) is rotatably connected to a connecting rod (8), and the connecting rod (8) is rotatably connected to the pressing handle (6), and a first baffle (9) is rotatably connected to the side of the first knife housing (1) away from the tension spring (5).

2. A telescopic knife with a push-type switch according to claim 1, characterized in that: A block (10) is slidably connected inside the first blade housing (1), a spring sheet (11) is fixedly connected inside the first blade housing (1) and located on one side of the block (10), the spring sheet (11) is fitted with the block (10), a slot (12) is provided on the upper surface of the blade (4), the slot (12) and the block (10) are used in conjunction with each other, a button (13) is slidably connected inside the second blade housing (2), and a compression spring (14) is provided between the button (13) and the second blade housing (2).

3. The telescopic knife with a push-type switch according to claim 1, characterized in that: A sliding button (15) is slidably connected inside the first knife housing (1) and located above the knife holder (3); a stopper (16) is fixedly connected to the bottom of the sliding button (15); the stopper (16) is used in conjunction with the pressing handle (6); and second stoppers (17) are fixedly connected to the corresponding two side edges of the sliding button (15).

4. A telescopic knife with a push-type switch according to claim 3, characterized in that: A protrusion (18) is fixedly connected to the top of the sliding button (15), and there are four protrusions (18) in total, and the four protrusions (18) are distributed at equal distances.

5. The telescopic knife with a push-type switch according to claim 3, characterized in that: The second baffle (17) is an L-shaped structure.

6. The telescopic knife with a push-type switch according to claim 1, characterized in that: The outer side wall of the blade (4) is in contact with the inner side wall of the blade holder (3).

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