Stationery knife

Abstract

The utility model discloses a stationery knife, belongs to a manual knife, and solves the problems that when a blade of an existing stationery knife is replaced, a push button assembly and the blade need to be detached from the rear end of a handle together, and operation is inconvenient. And the blade is assembled on the cutter pushing assembly in a replaceable mode, and when the cutter pushing assembly moves to the corresponding cutter changing control, the blade is replaced by operating a second control part of the cutter changing control. Accordingly, the knife pushing assembly drives the blade to move back and forth to adjust the position of the blade, for example, the blade extends out of the handle by a proper length and is stored in the handle, and the knife pushing assembly is positioned on the handle to fix the position of the blade, so that the blade is prevented from moving uncontrollably. When the cutter pushing assembly moves to the corresponding cutter changing control part, the blade can be replaced by operating the second control part of the cutter changing control part, the cutter pushing assembly does not need to be detached from the handle, and therefore the blade can be replaced conveniently.

Description

Technical Field

[0001] The utility model belongs to a manual knife, in particular to a stationery knife. Background Art

[0002] In the existing stationery knife, when replacing the blade, the push button assembly and the blade need to be slid off from the rear end of the handle, and the blade is installed on the push button assembly and then installed on the handle with the push button assembly. Since the push button assembly is completely separated from the handle, the assembly relationship between the push button assembly and the handle is difficult to determine, resulting in inconvenience in the operation of replacing the blade. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by the utility model are to overcome the defect of the existing stationery knife that when replacing the blade, the push button assembly and the blade need to be slid off from the rear end of the handle together, which causes the inconvenience of operation, and provide a stationery knife that is easy to replace the blade.

[0004] In order to achieve the above object, the stationery knife of the utility model comprises:

[0005] A handle for holding;

[0006] A push knife assembly is configured and positioned on the handle to be movable forward and backward, and includes a first control portion exposed outside the handle and used to move the push knife assembly forward and backward;

[0007] A tool change control, which is configured on the handle and has a second control portion protruding from the handle;

[0008] The blade is replaceably mounted on the push blade assembly and can be replaced by operating the second operating part of the tool change control when the push blade assembly moves to the corresponding tool change control.

[0009] Accordingly, the push knife assembly moves the blade forward and backward to adjust the position of the blade, such as extending the blade from the handle to a suitable length and storing the blade in the handle, and the push knife assembly is positioned on the handle to fix the position of the blade to prevent the blade from moving uncontrollably. When the push knife assembly moves to the corresponding blade change control, the blade can be replaced by operating the second control part of the blade change control without removing the push knife assembly from the handle, thereby facilitating the replacement of the blade.

[0010] Preferably, the push knife assembly comprises a knife holder slidably arranged in the handle, and the blade is replaceably mounted on the knife holder. Accordingly, the position of the blade is changed by the movement of the knife holder.

[0011] Preferably, the handle is provided with a slit extending forward and backward and a plurality of shifting grooves distributed along the slit, the first operating part is inserted into the knife holder and exposed outside the handle through the slit, and the first operating part is positioned in the corresponding shifting groove by the elastic force of the first elastic element to position the push blade assembly and the blade on the handle. Accordingly, the blade can be extended to a suitable length and positioned as needed.

[0012] Preferably, a locking element is disposed on the knife holder, and the locking element locks the blade to the knife holder by means of the elastic force of the second elastic element, thereby facilitating the replacement of the blade.

[0013] Preferably, the lock is in the shape of a lever and extends in the front-to-back direction, with a hook at its front end, the middle part of which is configured as a fulcrum of the lever on the tool holder, and the rear end of which receives the elastic force of the second elastic element; the blade has a mounting hole, and the hook is hooked in the mounting hole of the blade by the elastic force of the second elastic element to assemble the blade on the tool holder. The lock is in the shape of a lever and extends in the front-to-back direction, which can withstand greater pulling, optimize the force of the lock, and reliably mount the blade on the tool holder.

[0014] Preferably, the second operating part of the tool change control is a button, and the button is configured to press the button when the push knife assembly moves to the corresponding tool change control to cause the lock to actuate and unlock the blade from the knife holder. Accordingly, the tool can be changed by pressing the second operating part, and the tool change process does not require changing the position of the grip handle, which is easy to operate.

[0015] Preferably, a through hole is provided on the handle, and the button is constrained in the through hole by a constraining member to prevent the button from losing its position.

[0016] In order to facilitate the operation of the first control part, the slit and the first control part are located on the back of the handle. Therefore, the first control part can be controlled by the thumb when holding the handle, which is convenient for operation.

[0017] Preferably, a third elastic element is disposed in the handle, and when the push blade assembly moves to the corresponding blade change control, the elastic force of the third elastic element is applied to the blade holder to prevent the blade holder from shaking. Accordingly, when replacing the blade, it is ensured that the blade holder is in the correct position and does not shake, which is convenient for removing the blade from the blade holder and installing the blade to the blade holder.

[0018] Preferably, the side of the blade is provided with notches for the blade to break off here. Accordingly, when the front end blade edge of the blade becomes not sharp enough in use, a section of the front end of the blade can be broken off and discarded, so that the sharp blade of the rear portion is in the working position.

[0019] The utility model configures a push knife assembly and a knife change control that move forward and backward and are positioned on the handle, so that the blade can be replaceably mounted on the push knife assembly and replaced by operating the second control part of the knife change control when the push knife assembly moves to the corresponding knife change control. Accordingly, the push knife assembly moves the blade forward and backward to adjust the position of the blade, such as extending the blade from the handle to a suitable length and storing the blade in the handle, and the push knife assembly is positioned on the handle to fix the position of the blade to prevent the blade from moving uncontrollably. When the push knife assembly moves to the corresponding knife change control, the blade can be replaced by operating the second control part of the knife change control without removing the push knife assembly from the handle, thereby facilitating the replacement of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an isometric view of the stationery knife of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram from another perspective;

[0022] Figure 3 for Figure 1 The orthographic projection diagram of the stationery knife shown;

[0023] Figure 4 for Figure 3 AA section view;

[0024] Figure 5 for Figure 3 BB section view;

[0025] Figure 6 for Figure 3 The enlarged CC section view;

[0026] Figure 7 for Figure 1-2 The schematic diagram of the structure of the stationery knife shown;

[0027] Figure 8 for Figure 7 a schematic diagram of another view of the structure shown;

[0028] Description of the numbers in the figure:

[0029] 100 handle, 101 slit, 102 shifting groove, 103 through hole, 104 third elastic element, 105 constraint member, 106 first handle body, 107 second handle body, 108 sheath;

[0030] 200 a knife pusher assembly, 201 a first operating part, 202 a knife holder, 203 a first elastic element, 204 a locking element, 205 a second elastic element, 206 a hook, 207 a shoulder;

[0031] 300 tool change control unit, 301 second control unit;

[0032] 400 blade, 401 mounting hole, 402 notch. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0034] The terms "including" and "having" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0035] In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Among them, "upper" and "lower", "left" and "right", "front" and "back" are opposite directions.

[0036] In the description of the present utility model, it is necessary to understand that the technical features defined by the terms "first", "second" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, but do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present utility model.

[0037] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0038] like Figure 1-8 The stationery knife shown includes a handle 100 , a knife pusher assembly 200 , a knife change control 300 and a blade 400 .

[0039] In order to facilitate assembly, the handle 100 is composed of a first handle body 106 and a second handle body 107, which are spliced ​​together on the left and right and fastened together by a fastener. In order to enhance the comfort of holding, a sheath 108 is attached to the spliced ​​body of the first handle body and the second handle body. The handle 100 is provided with a slit 101 extending forward and backward and a plurality of shifting grooves 102 distributed along the slit. A third elastic element 104 is fixed to the front end of the inner wall of the first handle body 106. The third elastic element 104 is in the shape of a plate and is bent to one side. One end of the third elastic element 104 is fixed to the first handle body, and the other end is free and located in the guide groove. When it is squeezed to the right, it will generate a leftward elastic force, and its free end will move forward and backward to adjust its own shape and elastic force. When the push knife assembly 200 moves to the corresponding tool change control, the elastic force of the third elastic element 104 is applied to the tool holder 202 to prevent the tool holder from shaking. A plurality of shifting grooves 102 are provided on the upper edge of the inner wall of the first handle body 106. A track is provided on the inner wall of the handle to guide the tool holder to move forward and backward to prevent the tool holder from shaking up and down or left and right.

[0040] The push knife assembly 200 includes a knife holder 202 , a first operating portion 201 , a first elastic element 203 , a locking element 204 and a second elastic element 205 .

[0041] The knife holder 202 is assembled on the track in the handle 100 and can move forward and backward. The first control part 201 is inserted into the knife holder 202 like a push button and exposed outside the handle 100 through the slit 101. A first elastic element 203 is placed between the first control part 201 and the knife holder 202. The first elastic element 203 is a spiral compression spring and exerts an upward elastic force on the first control part 201. The shoulder 207 of the first control part 201 is embedded in the corresponding gear slot 102 by the elastic force of the first elastic element 203, thereby positioning the push knife assembly 200 and the blade 400 on the handle 100. Press the first control part 201 downward to make its shoulder 207 escape from the gear slot 102, and then push the first control part 201 with your fingers to move the knife holder 202 forward and backward in the handle.

[0042] As described above, the handle 100 and the push blade assembly 200 , the slit 101 and the first manipulation portion 201 are located at the back of the handle 100 for easy manipulation.

[0043] The lock 204 is assembled on the knife holder 202. The lock 204 is in the shape of a lever and extends in the front-back direction. The front end of the lock 204 has a hook 206. The middle part of the lock 204 is arranged on the knife holder with the shaft as the fulcrum of the lever. The rear end of the lock 204 receives the elastic force of the second elastic element 205. The second elastic element 205 is a helical compression spring and is located between the rear end of the lock 204 and the knife holder 202, so as to apply a leftward elastic force to the lock 204, so as to cause the hook 206 at the front end of the lock 204 to lean against the mounting hole 401 of the knife holder 202 for clamping the blade 400 to install and lock the blade on the knife holder.

[0044] The tool change control 300 is arranged on the handle 100 and has a second control part 301 protruding from the handle, and the second control part 301 is a button. The button is arranged so that when the push knife assembly 200 moves to the corresponding tool change control 300, the button is pressed to cause the lock 204 to actuate and unlock the blade 400 from the knife holder 202. Specifically, a through hole 103 is arranged on the second handle body 106, and a plate-shaped constraint 105 is assembled on the inner wall of the second handle body. The tool change control 300 is located between the inner wall of the second handle body 106 and the constraint 105, and the left end of the tool change control 300 as the second control part 301 protrudes from the second handle body 106 through the through hole 103 from the inner side of the second handle body, and the right end of the tool change control 300 passes through the through hole of the constraint 105 and points to the right.

[0045] The blade 400 is replaceably mounted on the blade holder 202 of the push blade assembly 200, and can be replaced by operating the second control unit of the tool change control when the push blade assembly moves to the corresponding tool change control 300. Specifically, the rear end of the blade 400 is provided with a mounting hole 401, such as Figure 4 In the assembly state shown, the hook 206 at the front end of the lock member is close to the knife holder 202 and is inserted into the mounting hole 401 of the blade 400 to lock the blade 400 to the knife holder. Figure 4 When the rear end of the lock 204 corresponds to the blade change control 300, pressing the second control part 301 can cause the lock 204 to swing, so that the hook 206 at the front end of the lock 204 swings leftward to disengage the mounting hole 401 of the blade 400. The side of the blade 400 is distributed with notches 402 for the blade to break.

[0046] As shown in the figure, by pressing down the first control part 201 to make its shoulder 207 disengage from the gear slot 102, you can use your fingers to push the first control part 201 to move the knife holder 202 forward and backward in the handle. When it moves to the desired position, release the first control part 201 to restore the positioning of the push knife assembly. When you need to replace the blade, move the knife holder 202 forward to Figure 4 When the rear end of the locking element 204 corresponds to the tool change control 300, pressing the second operating part 301 can cause the locking element 204 to swing, causing the hook 206 at the front end of the locking element to swing to the left to disengage from the mounting hole 401 of the blade 400, pull out the blade, and then insert a new blade, release the second operating part 301, and the locking rod 204 locks the blade to the blade holder, and the first operating part can be controlled to move the blade forward and backward.

Claims

1. Stationery knife, its characteristics are include: A handle (100) for holding; A push knife assembly (200) is configured and positioned on the handle so as to be movable forward and backward, and comprises a first control portion (201) exposed outside the handle and used for moving the push knife assembly forward and backward; A tool change control (300) is arranged on the handle and has a second control portion (301) protruding from the handle; The blade (400) is replaceably mounted on the push blade assembly and can be replaced by operating the second control part of the tool change control when the push blade assembly moves to the corresponding tool change control.

2. The stationery knife according to claim 1, characterized in that: The push knife assembly (200) comprises a knife holder (202) slidably arranged in a handle, and a blade (400) is replaceably mounted on the knife holder (202).

3. The stationery knife according to claim 2, characterized in that: The handle (100) is provided with a slit (101) extending forward and backward and a plurality of shifting grooves (102) distributed along the slit; the first operating portion (201) is inserted into the knife holder (202) and exposed outside the handle through the slit; the first operating portion (201) is positioned in the corresponding shifting groove (102) by the elastic force of the first elastic element (203) to position the push knife assembly (200) and the blade (400) on the handle (100).

4. The stationery knife according to claim 2, characterized in that: A locking element (204) is disposed on the knife holder (202), and the locking element (204) locks the blade (400) on the knife holder (202) by means of the elastic force of the second elastic element (205).

5. The stationery knife according to claim 4, characterized in that: The locking member (204) is lever-shaped and extends in the front-to-back direction, with a hook (206) at its front end, the middle portion of which is configured on the tool holder as a fulcrum of the lever, and the rear end of which receives the elastic force of the second elastic element; the blade (400) has a mounting hole (401), and the hook (206) is hooked in the mounting hole (401) of the blade by the elastic force of the second elastic element (205) to assemble the blade on the tool holder.

6. The stationery knife according to claim 4 or 5, characterized in that: The second control part of the tool change control (300) is a button, and the button is configured to cause the lock to actuate and unlock the blade from the blade holder when the push blade assembly moves to the corresponding tool change control.

7. The stationery knife according to claim 6, characterized in that: The handle (100) is provided with a through hole (103), and the button is constrained in the through hole (103) by a constraining member (105).

8. The stationery knife according to claim 3, characterized in that: The slit (101) and the first control portion (201) are located at the back of the handle.

9. The stationery knife according to claim 2, characterized in that: A third elastic element (104) is disposed in the handle (100), and when the push-knife assembly (200) moves to a corresponding tool-changing control unit (300), the elastic force of the third elastic element (104) is applied to the knife holder (202) to prevent the knife holder from shaking.

10. The stationery knife according to claim 1, characterized in that: The side of the blade (400) is provided with notches (402) for the blade to be broken.

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