CN2528590Y - Utility knife with self-replaceable blades - Google Patents

Abstract

The utility model relates to an art designing sword that can change blade by oneself, it is equipped with a gliding control panel of operatable in a casing, the control panel slides in the casing by the button control that pushes away that sets up on the reason on the casing, it wears out by casing front end open end to drive the blade most advanced, or receive the blade and get into the casing, be equipped with one in front end one side of control panel and supply a blade card to establish to hold the groove, but in addition be equipped with the blade room of a superpose multi-disc blade in one side that the casing leaned on the control panel to hold the groove, and be equipped with an enclosing cover in the outdoor side of blade, the enclosing cover inboard is equipped with one and pushes away the elastomer that supports the blade. Therefore, when the blade is dull and is to be replaced, the blade in the containing groove can be taken down only by pushing the control piece to the foremost end of the opening end of the shell, and when the control piece retracts into the shell for positioning, the innermost blade of the blade pushed by the elastic body on the inner side of the outer cover automatically falls into the containing groove to complete the action of replacing the blade, so that a user can replace the blade more quickly and conveniently.

Description

Utility knife with self-replaceable blades

technical field

The utility model relates to a utility knife in the field of manual cutting tools with adjustable blades, in particular to a utility knife with self-changing blades. It is provided with an operable and slidable control piece in a housing, and on one side of the control piece is provided with a slot for a blade to be clamped, and in the housing is provided a blade chamber where multiple blades can be stacked , the blade in the blade chamber is pushed to the control piece by an elastic body, when the blade is blunt and needs to be replaced, only need to push the control piece to the front end of the opening end of the housing, the blade in the tank can be removed, and When the control piece retracts into the housing for positioning, the elastic body automatically pushes a piece of blade in the blade chamber into the holding groove to complete the action of changing the blade.

Background technique

Utility knives have always been a sharp tool for people to cut objects. In order to meet the needs of various jobs, there are many different types of utility knives on the market. Among them, there is a product called "woodworking utility knife". A trapezoidal blade is assembled in the housing, the blade of which is formed on the long base of the trapezoid, when the user uses it, the blade is pushed out from the opening of the housing by the control mechanism arranged in the housing, and the blade An acute-angled tip protrudes from the outside of the casing, allowing users to perform cutting operations conveniently.

The existing woodworking utility knife blades are different from the utility knife blades used by ordinary craftsmen. Because they must bear greater force during use, the thickness of the blade is thicker and the structural strength is stronger. When the sharp-angled tip is blunted , it is impossible to break off the blade in pieces like a utility knife used by an artist to reproduce the sharp tip. It must open the case and turn the blade over for use, or remove the blade after the two sharp tips are blunted. renew.

As can be seen from the above description, it is inconvenient to replace the blade of this type of woodworking utility knife, especially when the user finds that the sharp-edged tip of the blade is blunt, the blade must be in use, and the user wants to turn the blade over or replace the blade. It is necessary to suspend the work in progress, which will cause inconvenience in operation and use; especially when using this kind of woodworking utility knife, most users will wear work gloves, and it will cause more trouble when changing the blade at this time. Inconvenient, the user often has to take off the gloves to replace the blades. If the work must be interrupted frequently in order to replace the blades during continuous work, or the gloves are taken off and put on again, the progress of the work will inevitably be affected. For professional workers, it will seriously affect the efficiency of work.

If viewed from another angle, the new blades of this type of woodworking utility knife are stored in a storage box. When the user wants to replace it, he must open the shell of the utility knife, remove the old blade, and then open it for storage. Take out a new blade from the box and put it in, then close the shell of the utility knife, and at the same time close the storage box and put it in place. This cumbersome procedure will inevitably cause considerable inconvenience to the user; When not using the storage box for the blades, the dilemma of having no blades to replace will occur. This shows that above-mentioned existing utility knife still has many defectives, and Cheng waits to be further improved.

In view of the above-mentioned defects that the existing woodworking utility knives cannot provide an effective replacement blade structure, the designer actively researched and innovated based on rich practical experience and professional knowledge. After continuous research, design, and repeated trials After sample and improvement, finally create the utility model that really has progress and practicability.

Contents of the invention

The main technical problem to be solved by the utility model is to overcome the defects of existing utility knives and provide a utility knife with self-replacable blades, so that an operable sliding control piece is arranged in a housing, and On the side of the control piece, there is a slot for a blade to be stuck, and on the side of the casing, there is a blade chamber where multiple blades can be stacked. When the user wants to change the blade, he only needs to push the control piece to the casing. The front end of the opening end of the body and the blade in the container are removed, and when the control piece is retracted into the housing for positioning, the elastic body automatically pushes a blade in the blade chamber into the container to complete the action of changing the blade , allowing users to replace blades more quickly and conveniently.

Another technical problem to be solved by the utility model is to provide a utility knife with self-replaceable blades, so that a blade chamber is provided in a housing where multiple blades can be stacked, that is, the user can insert Multiple blades are stored in the chamber, so that new blades can be carried with the utility knife, and it is more convenient for users to change blades.

The utility model solves its main technical problems by adopting the following technical solutions. According to the utility model, a utility knife with self-replaceable blades is provided, which is provided with an operable sliding control sheet in a casing, and the control sheet can be controlled by a push button arranged on the upper edge of the casing. Slide in the center to drive the tip of the blade to pass through the open end of the front end of the housing, or put the blade into the housing. A slot for a blade is provided on the front side of the control piece, and the other A blade chamber that can stack multiple blades is provided on the side of the housing close to the control piece slot, and an outer cover is provided on the outside of the blade chamber, and an elastic body that pushes against the blade is provided on the inside of the outer cover; Therefore, when the blade is blunt and wants to be replaced, the control piece can be pushed to the front end of the open end of the housing, the blade in the container can be removed, and when the control piece is retracted into the housing for positioning, the inner side of the outer cover The innermost blade of the blade pushed by the elastic body will automatically fall into the groove to complete the action of changing the blade.

The utility model solves its technical problem and can also adopt the following technical measures to further realize.

The aforementioned utility knife with self-replaceable blades, wherein the housing is composed of a first housing and a second housing located on both sides, and one end of the first housing and the second housing is respectively set as The open end where the blade protrudes, while the other end is the handle end.

In the aforementioned utility knife with self-replaceable blades, the first housing is provided with a penetrating blade chamber in its middle section.

In the aforementioned utility knife with self-replaceable blades, the first casing is provided with an outer cover at the outer opening of the blade chamber.

In the aforementioned utility knife with self-replaceable blades, a positioning block matching with the blade positioning notch is formed on the top surface of the blade chamber.

The aforementioned utility knife with self-replaceable blades, wherein the first housing is provided with a plug hole under the blade chamber, a buckle edge is provided on the upper edge of the outer cover, and a plug that can be plugged into the first housing is provided on the lower edge. plug in the hole.

In the aforementioned utility knife with self-replaceable blades, the outer cover is provided with an accommodating groove on the inner side for assembly of the elastic body that pushes against the blade.

The aforementioned utility knife with self-replaceable blades, wherein the first housing is provided with a joint hole on the upper edge near the opening end, and the joint hole is provided with a notch near the inner surface of the first housing; The body is provided with a joint screw hole at a position corresponding to the joint hole of the first shell, and the joint screw hole is formed with a notch corresponding to the notch of the first shell near the inner surface of the second shell; a stop block is pivotally assembled Between the combination hole and the combination screw hole of the aforementioned casing, a pivot hole that can be accommodated in the notch of the casing is provided at one end of the stop block, and a combination screw passes through the combination hole and the pivot hole and is screwed into the combination In the screw hole, the stop block is pivotally arranged at the notch of the casing, and the other end of the stop block provided with the pivot hole is a stop end.

The aforementioned self-replacable utility knife with blades, wherein the upper edge of the first housing is provided with a button hole near the joint hole; Button hole: a button column matching with the button hole of the shell is protruded on the bottom surface of the stop block.

In the aforementioned utility knife with self-replaceable blades, the two sides of the stop block are protrudingly provided with toggle wings for the user to toggle.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. It can be seen from the above technical solutions that the utility model is provided with an operable sliding control piece in a housing, and a storage slot for a piece of blade is provided on one side of the control piece, and on the other hand, the control piece is provided in the housing by the control piece. One side of the blade is provided with a blade chamber that can stack multiple blades, and an outer cover is provided on the outside of the blade chamber, and an elastic body that pushes against the blade is provided on the inner side of the outer cover. Push the blade to the front end of the opening end of the housing to remove the blade in the container, and when the control blade is retracted into the housing for positioning, the innermost blade pushed by the elastic body inside the outer cover will automatically Falling into the container completes the action of replacing the blade, allowing the user to replace the blade more quickly and more conveniently.

To sum up, the utility model is mainly provided with an operable sliding control piece in a casing, and on one side of the control piece is provided a holding slot for a piece of blade clamping, and on the side of the casing is provided a movable The blade chamber with multiple blades stacked, when the user wants to change the blade, only need to push the control piece to the front of the opening end of the housing and remove the blade in the slot, then the control piece can be retracted into the housing When positioned in the center, the elastic body automatically pushes a blade in the blade chamber into the slot to complete the action of changing the blade, allowing the user to change the blade more quickly and conveniently. In addition, a housing is provided with a blade chamber that can stack multiple blades, that is, the user can store multiple blades in the blade chamber, so that a new blade can be carried with the utility knife, and when the user wants to replace the blade more convenient. It provides this kind of woodworking utility knife with the effect of self-replacing blades with its excellent structural configuration. It is indeed a very outstanding structural design, and no similar structural design has been published or used in similar products. Both in terms of structure and function, there is a big improvement, and there is a big progress in technology, and it produces a useful and practical effect, and it does have enhanced efficacy, so it is more suitable for practical use. It is truly a novelty. , Progressive and practical new design.

Description of drawings

Fig. 1 is a schematic perspective view of the appearance of a preferred embodiment of the present invention.

Fig. 2 is a three-dimensional schematic view of a preferred embodiment of the utility model in which an acute-angled tip of the blade is pushed out of the opening of the housing.

Fig. 3 is a perspective schematic diagram of a state in which the control piece in the casing is pushed to the frontmost position of the opening end of the casing in a preferred embodiment of the present invention, and the old blade can be removed.

Fig. 4 is an exploded perspective view of components in a preferred embodiment of the present invention.

Fig. 5 is a three-dimensional structural schematic view of the side of the control piece holding tank of the present invention.

Fig. 6 is a schematic diagram of the disassembled second housing of the preferred embodiment of the present invention, in which the state shown is the state in which the blade is condensed in the housing in Fig. 1 .

Fig. 7 is a schematic diagram of the disassembled second housing of the preferred embodiment of the present invention, which shows a state where the control piece is located at a position between the retracted position of the blade and the use state.

Fig. 8 is a schematic diagram of the disassembled second housing of the preferred embodiment of the utility model, in which the state shown is the use state in which the acute-angled tip of the blade in Fig. 2 is pushed out of the opening end of the housing.

Fig. 9 is a schematic diagram of the disassembled structure of the second housing in a preferred embodiment of the present invention, in which the state shown is that the control piece in Fig. 3 is pushed to the frontmost position of the opening end of the housing, and the old blade can be removed state.

FIG. 10 is a partial structural cross-sectional view of the position of the blade chamber of the first casing of the present invention.

Fig. 11 is a schematic cross-sectional view of part of the structure of the runner chamber of the second casing of the present invention.

(10) First shell (100) Open end

(102) Grip end (104) Slideway

(12) Blade chamber (120) Plug hole

(122) Positioning block (14) Guide groove

(16) Convex ribs (18) Fixing holes

(19) Combination hole (190) Recess

(192) Buttonhole (20) Second housing

(200) Open end (202) Handle end

(204) Slideway (22) Control slot

(220) Leading edge (222) Inner engagement groove

(224) Middle engaging groove (226) Outer engaging groove

(24) Runner chamber (240) Screw hole

(242) Toggle hole (26) Recess

(28) Fixed screw hole (29) Combined screw hole

(290) Notch (292) Buttonhole

(30) Control piece (32) Container

(320) Locating block (322) Rib groove

(34) Guide edge (340) Guide piece

(36) Sleeve (360) Hook

(38) Push button mouth (40) Handle shell

(42) Insert (44) Hanging hole

(50) Cover (52) Buckle

(54) Plunger (56) Receptacle

(58) Elastomer (60) Stop block

(62) Pivot hole (64) Stop end

(66) Buckle Post (68) Toggle Wing

(70) Push Button (72) Extension

(720) Snap block (722) Spring snap slot

(74) Torsion Spring (740) Fixed End

(742) snap end (80) runner

(800) Screw hole (802) Compression post

(82) Assembly screws (90) Set screws

(92) Combination screw (99) Blade

(990) positioning gap

Detailed ways

The specific implementation, structure, features and functions of the utility knife with self-replaceable blades according to the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Please refer to Fig. 1, which is a schematic view of the appearance of a preferred embodiment of the present invention, wherein the blade is shown in a state where the blade is condensed in the housing. The utility model can replace the utility knife with blades by itself, and its housing outline is similar to that of the existing woodworking knife. Similar to a utility knife, it can be conveniently held and applied by the user, and the housing of the utility model is composed of the first housing (10) located on both sides, the second housing (20) and the end housing. The handle shell (40) is assembled, and a push button (70) is protruded on the upper edge of the shell, and the push button (70) can be moved along the slideways of the first shell (10) and the second shell (20). (104), (204) slide in the slit formed by merging, and a stop block (60) is provided at the slit front end formed by merging of the slideways (104), (204), A runner (80) is then provided on the side near the open end.

Please refer to shown in Fig. 2, it shows the preferred embodiment of the utility model Fig. 1 to push the blade (99) an acute-angled tip out of the perspective schematic diagram of the use state of the housing opening, wherein it can be seen that the push button positioned on the upper edge of the housing (70) is pushed to the front end of the slit formed by the combination of slideways (104) and (204), and is blocked by the stop block (60) for positioning, so that the sharp-angled tip of the blade (99) is pushed out to an appropriate length from the opening end of the housing .

Please refer to Fig. 3 again, which shows that the preferred embodiment of Fig. 1 of the utility model lifts the stop block (60), and pushes the push button (70) to slideways (104), (204) to form As can be seen from the figure, the front end of the control piece (30) assembled in the housing of the utility model is pushed out from the opening end of the housing, and the blade (99) assembled at the front end of the control piece (30) can be remove.

Please refer to Fig. 4, which is an exploded three-dimensional schematic diagram of the assembly structure of a preferred embodiment of the present invention, wherein the detailed structure of each component of the present invention can be seen, wherein:

The first housing (10), its front end is an open end (100), and its rear end is then a handle end (102), and the inner side of the upper edge is provided with a slightly concave slideway (104). The middle section of a housing (10) is formed with a penetrating blade chamber (12), a plug hole (120) is arranged below the blade chamber (12), and a downward protruding hole is formed on the upper edge of the blade chamber (12). The positioning block (122) is formed between the blade chamber (12) and the plug hole (120) inside the first housing (10) to form a guide groove (14) that traverses the first housing (10). Two transverse ribs (16) are provided on the inner side of the first housing (10) between the chamber (12) and the opening end (100), and two horizontal ribs (16) are provided on the first housing (10) near the handle end (102). There is a fixing hole (18), and a combination hole (19) is provided on the upper edge close to the opening end (100). The combination hole (19) is formed with a notch (190) close to the inner surface of the first housing (10). ), in addition, a button hole (192) is provided at the upper edge of the first housing (10) near the combination hole (19);

The second housing (20), the front end is an open end (200), the rear end is a handle end (202), and the inner side of its upper edge is provided with a slideway (104) relative to the first housing (10). For the recessed slideway (204), please refer to the plan view shown in Figure 6 to know that a control groove (22) extending from the open end (200) to the handle end (202) is formed on the inner side of the second housing (20) , the edge of the control groove (22) near the slideway (204) is a guide edge (220), and an inner engaging groove (222) and a middle engaging groove (224) are arranged on the guiding edge (220). And an outer engagement groove (226), a slightly circular runner chamber (24) is provided at the control groove (22) near the open end (200), and a screw hole is provided in the center of the runner chamber (24) (240), and form an arc-shaped toggle hole (242) connected inside and outside by the side of the slideway (204) in the runner chamber (24), as can be seen in Fig. 4 in the second housing (20 ) is formed with a slot (26) on the outer surface, and a fixing screw hole (28) is provided at the position corresponding to the fixing hole (18) of the first housing (10) in the second housing (20), corresponding to the first housing (10). The position of the combination hole (19) of a housing (10) is provided with a combination screw hole (29), and the combination screw hole (29) is formed on the inner surface of the second housing (20). The notch (290) corresponding to the notch (190), and a buttonhole (292) is formed on the upper edge of the second casing (20) corresponding to the buttonhole (192) of the first casing (10);

The control piece (30) is assembled in the control groove (22) of the second housing (20), and is sandwiched between the inner surface of the first housing (10) and the second housing (20). Please refer to As shown in Fig. 5, at the front end of the side of the control piece (30) facing the first housing (10) and close to the opening end of the housing, a groove (32) capable of accommodating the thickness of a blade is formed, and in the groove (32) The upper edge is formed with a protruding positioning block (320), and the thicker part of the control piece (30) on the rear side of the tank (32) is formed with two concave rib grooves (322). A guide edge (34) that can be accommodated in the guide groove (14) of the first housing (10) is provided on the lower edge of the side of the control piece (30) that is provided with the groove (32). (30) The side near the upper edge of the tank (32) is not provided with two protruding and straight-line guide pieces (340) along the direction of the upper edge, and the control piece (30) is not provided A set of columns (36) and a hook (360) are provided on one side of the container (32) near the rear end, and a push button opening (38) is formed on the upper edge of the control piece (30);

A handle shell (40), which is slightly in the form of a set, can be sleeved on the handle ends (102), (202) after the first shell (10) and the second shell (20) are assembled. The outer side, which can be beneficial to the user's grip, extends an insert (42) that can be embedded in the outer slot (26) of the second housing (20) on one side of the handle shell (40), and A hanging hole (44) is formed at the end of the handle shell (40);

An outer cover (50) can be covered at the outer opening of the blade chamber (12) of the first housing (10). As shown in Figure 4, the outer cover (50) has a The profile is provided with buckle edge (52) on its upper edge, and the lower edge is provided with plug post (54) that can be plugged into the plug hole (120) of the first housing (10). ) is provided with an accommodating groove (56) inside, and an elastic body (58) can be assembled in the accommodating groove (56). A pushing spring, which can also be elastic rubber or similar elastic components;

A stop block (60), pivotally installed between the joint hole (19) and the joint screw hole (29) near the front end of the upper edge of the housing, is provided at one end of the stop block (60). The pivot hole (62) in the shell notch (190), (290) can be combined with the screw (92) to pass through the combination hole (19), pivot hole (62) and be screwed into the combination screw hole (29) during assembly Among them, the stop block (60) is pivotally arranged at the housing notch (190), (290), and the other end of the stop block (60) provided with the pivot hole (62) is a stop end (64), On the bottom surface of the stop block (60), there is a button column (66) that is matched with the shell button holes (192), (292). The stirring wing (68);

A push button (70) is assembled on the upper edge of the housing, and the bottom surface of the push button (70) extends an extension sheet (72) that can penetrate the gap formed by the combination of slideways (104) and (204). A protruding engaging block (720) is formed on one side of the extension piece (72) close to the second housing (20), and a spring bayonet (722) is formed on one side edge of the extension piece (72);

A torsion spring (74), assembled on the side of the control piece (30) close to the second housing (20), and can be sleeved on the sleeve (36) of the control piece (30), the torsion spring (74 ) is a fixed end (740), the fixed end (740) is engaged in the hook (360) of the control piece (30), and the other end of the torsion spring (74) is an engaging end (742) , which can be clamped in the spring clamping slot (722) of the push button (70);

A runner (80), as shown in Figure 4 and Figure 6, is assembled and arranged in the second housing (20) runner chamber (24), and the center of the runner (80) is provided with a screw hole (800), Please refer to Fig. 11, a tightening column (802) is formed on the side of the runner (80) facing the control piece (30), and an assembly screw (82) is screwed and assembled in the runner chamber (24) The screw hole (240) place, and the running wheel (80) can be screwed and assembled on the assembly screw (82) according to the screw hole (800);

A fixing screw (90), screwed to the fixing hole (18) and fixing screw hole (28) near the handle end (102), (202) of the first housing (10) and the second housing (20) place, which can be combined and fixed;

The blades (99) can be stacked and accommodated in the blade chamber (12) of the first housing (10), and a positioning gap (990) is formed on the edge of the blade back of each blade (99), and assembled on the blade (99) When entering the blade chamber (12), the positioning notch (990) is just aligned with the positioning block (122) in the blade chamber (12).

Please refer to Fig. 6, which is a schematic diagram of the disassembled structure of the second housing (20) in a preferred embodiment of the present invention, wherein the state shown is the state in which the blade (99) is condensed in the housing in Fig. 1, It can be seen from the figure that the structure configuration state between the various components of the utility model, the control piece (30) is sandwiched between the first and second housings (10), (20), and the push button (70) is assembled in the housing The upper edge of the body, its extension piece (72) passes through the gap formed by the combination of slideways (104) and (204) and penetrates into the housing, and the lower end of the extension piece is inserted into the push button opening of the control piece (30) ( 38), the torsion spring (74) is sheathed on the sleeve (36) of the control piece (30), its fixed end (740) is set at the hook (360), and the engaging end (742) passes through The spring bayonet (722) of push button (70) is combined with push button (70), and provides push button (70) a power that pushes upwards, because this push button (70) is subjected to torsion spring (74) Therefore, at this position, the engaging block (720) is aligned with the inner engaging groove (222) on the leading edge (220) of the control groove (22) of the second housing (20), so the push button (70) will produce an upward displacement, so that the engaging block (720) is snapped into the inner engaging groove (222), so that the control piece (30) is stuck at this position and cannot move, so that the utility model can Safer; In the figure, it can be seen that a blade (99) is accommodated in the container groove (32) of the control sheet (30), and the position of the blade (99) can be in the first housing (10) blade chamber (12) slightly close to the position of the opening end, or coincide with the position of the blade chamber (12) of the first housing (10).

When the user wants to use it, the push button (70) can be pressed into the housing, so that the extension piece (72) will be displaced in the push button opening (38), and the torsion spring (74) will be twisted and deformed, and the extension piece will be extended. The engaging block (720) on the side of the sheet (72) breaks away from the inner engaging groove (222), and the force applied by the push button (70) drives the control sheet (30) to slide towards the front end in the housing, as shown in Figure 7 In the aspect shown in , in the process of its sliding, the engaging block (720) abuts against the bottom edge of the leading edge (220) of the control groove (22) of the second housing (20), when the push button (70) When the gap formed by merging along the slideways (104) and (204) moves to the stop end (64) of the stop block (60), the push button (70) can no longer move forward, and the engaging block (720) is just in the center of the engagement groove (224), that is, at this time, the push button (70) will be pushed up by the torsion spring (74) so that the engagement block (720) is snapped into the middle engagement groove (224) 2 and 8, where an acute-angled tip of the blade (99) is pushed out from the open end of the casing, and can be used by the user. In this state, the engaging block (720) engages In the middle engaging groove (224), therefore, when using the blade (99), the control piece (30) will not be retracted in the casing due to force, and stability during use can be provided.

Please refer to Fig. 3, Fig. 4 and Fig. 9, when the acute angle tip of the blade (99) in use of the utility model is blunted and needs to be updated, the stop block (60) at the front end of the upper edge of the housing can be pivoted and raised , so that the push button (70) can be pushed down again and then pushed to the opening end closest to the shell along the gap formed by the combination of slideways (104) and (204), when the push button (70) is pushed down again , its engaging block (720) will disengage from the middle engaging groove (224), and when the push button (70) is pushed to the front end of the gap formed by the combination of slideways (104), (204), the engaging block (720 ) is just aligned with the positive outer engaging groove (226), at this time the user releases the push button (70), and the push button (70) will be pushed up by the torsion spring (74) so that the engaging block (720) snaps in In the outer engaging groove (226) (as shown in Fig. 3 and Fig. 9), the front section of the control piece (30) has stretched out from the opening end of the housing at this time, so that most of the containing groove (32) is exposed on the housing At this time, the user only needs to dial the blade (99) in the container (32) slightly outward, and the positioning notch (990) of the blade (99) can be separated from the positioning block (320) of the container (32). ), and this blade (99) can be taken off from the holding tank (32).

After the blade (99) in the holding slot (32) of the control piece (30) is removed, the user can press down the push button (70) from the position shown in Fig. 3 and Fig. 9 and pull it back to the housing When the handle end is pulled back to the position shown in Fig. 1 and Fig. 6, or move to the position closest to the handle end of the housing along the gap formed by the combination of slideways (104) and (204), the control piece (30 ) container (32) coincides with the blade chamber (12), and the positioning block (320) in the control piece (30) container (32) is opposite to the positioning block (122) in the blade chamber (12), and a New blade (99) promptly can be sent in the control piece (30) containing groove (32) for the user to continue to use automatically, certainly, after the user pulls back this push button (70) back to Fig. 1, Fig. 6 After the position shown, then the stopper (60) must be turned back to the original position, so that the button post (66) of the stopper (60) is buckled in the button holes (192), (292) of the housing.

Please refer to Fig. 10 again, the upper edge of the outer cover (50) of the present utility model is provided with a buckle edge (52) which is fastened on the opening edge of the blade chamber (12) of the first housing (10), while the lower edge is The plug post (54) is plugged in the plug hole (120) in a tight fit structure to achieve the covering effect. It can be seen in the figure that a plurality of stacked blades (99) are accommodated in the blade chamber (12). ), and the elastic body (58) accommodated in the accommodating groove (56) pushes the stacked blades (99) towards the second housing (20), so that the stacked blades (99) can lean against the The control piece (30) sandwiched between the first housing (10) and the second housing (20) is provided with one side of the tank (32) (not shown in this figure), so as shown in Figure 3,, As shown in Figure 9, the blunt blade (99) in the control piece (30) container (32) is taken off, and when the control piece (30) is pulled back to the position among Fig. 1 and Fig. 6, the control piece ( 30) the holding groove is just facing the blade chamber (12), and a blade that allows stacked blades (99) to lean against the side of the control sheet (30) is pushed into the holding groove (32), and the control sheet can (30) drive and re-use; please refer to shown in Fig. 4 and know, be provided with two convex ribs (16) between the blade chamber (12) of the first housing (10) and the open end (100), The width of the control groove (22) between the edge of the protruding rib (16) and the second housing (20) only allows the control piece (30) to pass through the accommodating blade (99) in the groove (32), so they are stacked. Many new blades (99) in the blade chamber (12) will be blocked by the convex ribs (16) when the control sheet (30) shifts, and will not be driven by the control sheet (30). Guarantee that the control piece (30) holding tank (32) only drives the single blade (99) at a time, so the thicker part of the control piece (30) thickness at the back side of the holding tank (32) is formed with two concave The rib groove (322) (as shown in Figure 5), when the control piece (30) moved to the housing front end, the rib groove (322) would cross the protruding rib (16), and let the control piece (30) The single blade (99) is smoothly displaced, while the remaining blades stacked in the blade chamber (12) will be blocked by the convex ribs (16) and left in the blade chamber (12) for standby use.

Please refer to shown in Fig. 11 again, it is the partial structure sectional view of the position of the second casing (20) runner chamber (24) of the present utility model, wherein it can be seen that the runner (80) is housed in the runner chamber (24), its side edge is exposed at the toggle hole (242) (as shown in Figure 4), and the assembly screw (82) is fixedly combined in the screw hole (240) of the second housing (20). , the runner (80) is assembled on the assembly screw (82) with the screw hole (800), when the user turns the rotation (80) from the toggle hole (242), the runner (80) can be Move axially on the assembly screw (82), that is, the user can turn the wheel (80) so that the pressing column (802) is attached to the first housing (10), when the control piece (30) of the present utility model ) to the state of use shown in Figure 2 and Figure 8, turning the wheel (80) can make the end face of the pressing column (802) close to the side of the control piece (30), and the control piece (30) is clamped on the Between the pressing column (802) and the first housing (10), that is, the blade (99) is sandwiched between the control piece (30) groove (32) and the convex rib (16) (not shown in Fig. 11 ). As shown), the utility knife of the present utility model can have a more stable blade (99) when in use, and it can solve the problem that the common utility knife of this type leaves a gap between the components in order to provide the sliding operation of the blade, causing the blade to slip during use. The lack of shaking.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model, All should still belong to the scope of the technical solution of the utility model.

Claims (10)

1. A utility knife capable of self-replacing blades, which is provided with an operable sliding control piece in a housing, and the control piece is controlled to slide in the housing by a push button arranged on the upper edge of the housing, Drive the tip of the blade through the open end of the front end of the housing, or put the blade into the housing. It is characterized in that: a slot for a blade is provided on the front side of the control piece. The housing is provided with a blade chamber that can stack multiple blades on the side of the control piece slot, and an outer cover is provided outside the blade chamber, and an elastic body that pushes against the blade is provided inside the outer cover; In this way, when the blade is blunt and needs to be replaced, the control piece can be pushed to the front end of the opening end of the housing, the blade in the container can be removed, and when the control piece is retracted into the housing for positioning, the outer cover can The innermost blade of the blade pushed by the inner elastic body will automatically fall into the holding groove to complete the action of changing the blade. 2. The utility knife with self-replaceable blades according to claim 1, wherein the housing is composed of a first housing and a second housing located on both sides, and the first housing One end of the second casing is respectively set as an open end where the blade protrudes, and the other end is a handle end. 3. The utility knife with self-replaceable blades according to claim 1, wherein said first housing is provided with a penetrating blade chamber in its middle section. 4. The utility knife with self-replaceable blades according to claim 3, wherein said first casing is provided with an outer cover at the outer opening of the blade chamber. 5. The utility knife with self-replaceable blades according to claim 3, wherein the top surface of the blade chamber is provided with a positioning block matching with the positioning notch of the blade. 6. The utility knife with self-replaceable blades according to claim 4, wherein said first casing is provided with a plug hole below the blade chamber, a buckle edge is provided on the upper edge of the outer cover, and a lower edge is A plunger that can be plugged into the plug hole of the first casing is provided. 7. The utility knife with self-replaceable blades according to claim 4, wherein said outer cover is provided with an accommodating groove on the inner side for the assembly of the elastic body that pushes against the blade. 8. The utility knife with self-replaceable blades according to claim 2, wherein the upper edge of the first shell is provided with a joint hole near the opening end, and the joint hole is close to the inner surface of the first shell. formed with a notch; A coupling screw hole is provided at a position corresponding to the coupling hole of the first housing on the second housing, and a notch corresponding to the notch of the first housing is formed in the coupling screw hole on the inner surface of the second housing; A stop block is pivotally assembled between the combination hole and the combination screw hole of the aforementioned casing, and a pivot hole that can be accommodated in the notch of the casing is provided at one end of the stop block, and a combination screw passes through the combination hole, The pivot hole is screwed into the combined screw hole, and the stop block is pivotally arranged at the notch of the shell. The other end of the stop block provided with the pivot hole is a stop end. 9. The utility knife with self-replaceable blades according to claim 8, wherein the upper edge of the first shell is provided with a button hole close to the joint hole; A button hole is formed at the button hole of the first shell; a button post matching with the button hole of the shell is protruded from the bottom surface of the stop block. 10. The utility knife with self-replaceable blades according to claim 8 or 9, wherein two sides of the stop block are protrudingly provided with toggle wings for the user to toggle.

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