Multifunctional practical knife

Abstract

The utility model discloses a multifunctional practical knife, belongs to a manual knife, and aims to solve the problems that the conventional practical knife is single in function, particularly can scratch the surface when being used for scraping sundries attached to the surface, and is inconvenient to use. When the tool rest is located at the posture changing position, the second frame body is allowed to be switched between the first posture and the second posture. The second frame body can be switched to the first posture and the knife rest can be moved back and forth, and the knife rest can be moved to the posture changing position and the second frame body can be switched to the second posture, so that the length of the blade extending out of the handle and the orientation of the blade are changed, and different functions of the practical knife are achieved. If the second frame body is switched to the first posture, the cutting edge of the blade faces downwards for cutting, and when the second frame body is switched to the second posture, the cutting edge of the blade faces forwards for shoveling and scraping.

Description

Technical Field

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

[0002] Common utility knives only have the function of cutting objects. During use, when you need to scrape off paint or glue attached to a surface (such as a tile surface, glass surface, or wooden mold surface), it is difficult to maintain a better posture and the tip of the blade often stabs the surface. A utility knife cannot achieve the same effect as a scraper, will scratch the surface, and is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by the utility model are to overcome the defects of the existing utility knife that the function is single, especially the surface will be scratched when used to scrape off the sundries attached to the surface, and the use is inconvenient, and provide a multifunctional utility knife.

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

[0005] A handle for holding,

[0006] A tool holder, which is arranged on the handle to move forward and backward and has a posture change position in the movement stroke, the tool holder includes a first frame body and a second frame body constrained together, the second frame body is allowed to switch between a first posture and a second posture when the tool holder is located at the posture change position, the second frame body is configured to move forward and backward relative to the handle together with the first frame body when the second frame body switches to the first posture, and the second frame body is prevented from switching to the second posture when it deviates from the posture change position, and the tool holder is prevented from moving forward and backward when the second frame body switches to the second posture;

[0007] The blade is mounted on the second frame to change its direction as the posture of the second frame is switched. When the blade holder is located at the posture change position, the blade exposes the handle.

[0008] Accordingly, the second frame can be switched to the first posture and the knife holder can be moved forward and backward as needed, and the knife holder can also be moved to the posture change position and the second frame can be switched to the second posture, thereby changing the length of the blade extending out of the handle and the direction of the blade, and realizing different functions of the utility knife. For example, when the second frame is switched to the first posture, the blade edge is directed downward for cutting, and when the second frame is switched to the second posture, the blade edge is directed forward for scraping. Accordingly, by configuring the first frame and the second frame constrained together with the knife holder, the direction of the blade and the way of using the utility knife can be changed as needed, thereby expanding the functions of the utility knife.

[0009] Preferably, the posture change position is located at the limit position of the tool holder moving forward relative to the handle. When the posture of the second frame needs to be changed, the user pushes the tool holder forward to the limit position. Obviously, the limit position is easy to determine. When the tool holder can be positioned at different gears of the handle, the limit position is the frontmost gear position.

[0010] Preferably, the second frame is connected to the first frame by a shaft and the shaft is used to switch the second frame between the first posture and the second posture. Accordingly, the second frame can be placed side by side with the first frame, so as not to increase the size of the knife holder and cause the volume of the entire utility knife to be too large. Moreover, the shaft serves as a support for the second bracket, which enables the shaft to rotate flexibly to change the posture and constrain the second frame and the first frame to move forward and backward together.

[0011] Preferably, a posture switching member is disposed on the handle, and when the tool holder is located at the posture changing position, the posture switching member is connected with the second frame to switch the second frame between the first posture and the second posture. Accordingly, the posture of the second frame is switched by operating the posture switching member, which is convenient for operation and control.

[0012] Preferably, a second slide is provided in the handle, and the second slide includes a first slide provided on the handle and a second slide provided on the attitude switching member. When the tool holder is located at the attitude changing position, the second frame body slides with the second slide and disengages from the first slide. Therefore, the attitude switching member can rotate the second frame body to switch the attitude. When the tool holder deviates from the attitude changing position, the second frame body slides with the first slide, thereby limiting the rotation of the second frame body and only allowing it to move forward and backward. In this way, the second tool holder can be prevented from being misoperated.

[0013] Preferably, a first slideway is provided in the handle, and the first frame body is slidably matched with the first slideway during the entire travel of the tool holder moving forward and backward, thereby guiding the first frame body and the entire tool holder to move smoothly.

[0014] Preferably, the posture switching member is rotatably arranged on the handle. This facilitates the posture switching of the second tool holder by the rotation of the posture switching member. Moreover, the handle is provided with an arc hole, and the posture switching member is exposed from the arc hole to the handle for operation.

[0015] Preferably, when the tool holder is in the posture change position, the posture switching member is positioned on the handle to keep the second holder in the first posture or the second posture. Accordingly, the second tool holder can be positioned in the first posture or the second posture by the posture switching member to ensure safe use and avoid accidental rotation of the second tool holder.

[0016] Preferably, for the convenience of operation, a positioning protrusion and a positioning groove are separately provided on the handle and the posture switching member, and the positioning protrusion is located in the positioning groove by the elastic force of the first elastic element to position the posture switching member on the handle. Accordingly, the posture switching member can be pressed to overcome the elastic force of the first elastic element to release the positioning and the posture switching member can be rotated accordingly to change the posture of the second frame, which is convenient to operate and simple in structure.

[0017] Preferably, the handle includes a fixing member, and the posture switching member is constrained between the handle and the fixing member. This structure not only realizes the assembly of the posture switching member to the handle, but also guides the movement of the posture switching member, so that the posture of the second frame can be changed by operating the posture switching member.

[0018] Preferably, a swingable support is arranged on the handle, and when the second frame is switched to the second posture, the support supports the second frame thereon to prevent the second frame from rotating, thereby enhancing the stability of the second frame and preventing the second frame from accidentally rotating or deviating from the second posture due to excessive force when the second frame is switched to the second posture.

[0019] Preferably, a pin is provided on the support member, and when the support member supports the second frame body in the second posture, the pin locks the support member relative to the handle, thereby increasing the reliability of the support member supporting the second frame body.

[0020] Preferably, the second frame is equipped with a blade changing structure, and when the second frame is switched to the first posture and the handle is extended, the blade changing structure is exposed, so as to replace the blade.

[0021] Preferably, the blade changing structure includes a swinging member, the middle part of which is swingably arranged on the second frame, the upper end of which is exposed outside the second frame, and the lower end of which locks the blade by the elastic force of the second elastic element. Accordingly, by lever action, the elastic force of the second elastic element is overcome by pressing the upper end of the swinging member to release the locking installation of the blade.

[0022] Preferably, a push button is arranged on the first frame, a slit extending in the front-to-back direction is arranged on the handle, and a stop structure is arranged along the slit, the push button extends out of the handle through the slit and cooperates with the stop structure to position the knife holder on the handle during the forward and backward movement. Accordingly, the knife holder can be positioned at different positions of the handle, the blade can be retracted into the handle, or the length of the blade extending out of the handle can be adjusted.

[0023] The utility model forms a knife holder by constraining a first frame and a second frame together. When the knife holder is in a posture change position, the second frame is allowed to switch between the first posture and the second posture. When the second frame switches to the first posture, it is configured to move forward and backward with the first frame relative to the handle and prevent the second frame from switching to the second posture when it deviates from the posture change position. When the second frame switches to the second posture, it prevents the knife holder from moving forward and backward. Accordingly, the second frame can be switched to the first posture and the knife holder can be moved forward and backward as needed. The knife holder can also be moved to the posture change position and the second frame can be switched to the second posture, thereby changing the length of the blade extending out of the handle and the direction of the blade, so as to realize different functions of the utility knife. For example, when the second frame is switched to the first posture, the blade is directed downward for cutting, and when the second frame is switched to the second posture, the blade is directed forward for scraping. Accordingly, by configuring the first frame and the second frame constrained together, the direction of the blade and the use of the utility knife can be changed as needed, thereby expanding the functions of the utility knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the blade of the multifunctional utility knife of the utility model extending out of the handle;

[0025] Figure 2 for Figure 1 A schematic diagram of the multifunctional utility knife with the second handle disassembled;

[0026] Figure 3 for Figure 1 A schematic diagram of another perspective of the multi-functional utility knife shown;

[0027] Figure 4 for Figure 2 a schematic diagram of another view of the structure shown;

[0028] Figure 5 for Figure 1 An exploded schematic diagram of the structure of the multi-purpose utility knife shown;

[0029] Figure 6 for Figure 5 a schematic diagram of another view of the structure shown;

[0030] Figure 7 for Figure 5 A schematic diagram of the structural decomposition of the second tool holder shown in FIG.

[0031] Figure 8 for Figure 7 a schematic diagram of another view of the structure shown;

[0032] Fig. 9 for Figure 5 A schematic diagram of the structural decomposition of the support member shown in FIG.

[0033] Fig.10 for Fig. 9 a schematic diagram of another view of the structure shown;

[0034] Fig.11 for Figure 1 A schematic side orthographic projection diagram of the multifunctional utility knife when the knife holder is in a posture change position;

[0035] Fig.12 For Fig.11 A schematic diagram of the state in which the support member is flipped away from the support position;

[0036] Fig.13 For Fig.12 A schematic diagram showing the state in which the second frame is flipped to a second posture;

[0037] Fig.14 For Fig.13 A schematic diagram of the state in which the support member is flipped to the supporting position;

[0038] Fig.15 For Fig.14 A schematic diagram of a rear view perspective with the first handle body removed;

[0039] Fig.16 for Fig.11 A schematic diagram of the tool holder and the support member in the state shown;

[0040] Fig.17 for Fig.16 Rear view of

[0041] Fig.18 for Fig.12 A schematic diagram of the tool holder and the support member in the state shown;

[0042] Fig.19 for Fig.18 Rear view of

[0043] Fig. 20 for Fig.13 A schematic diagram of the tool holder and the support member in the state shown;

[0044] Fig.21 for Fig. 20 Rear view of

[0045] Fig. 22 for Fig.14 A schematic diagram of the tool holder and the support member in the state shown;

[0046] Fig.23 for Fig. 22 Rear view of

[0047] Description of the numbers in the figure:

[0048] 100 handle, 101 first handle body, 102 second handle body, 103 first slideway, 104 second slideway, 105 first section slideway, 106 second section slideway, 107 arc hole, 108 positioning groove, 109 fixing member, 110 supporting member, 111 pin, 112 slit, 113 shifting groove, 114 shaft segment, 115 fourth elastic element, 116 pushing member;

[0049] 200 tool holder, 201 first frame, 202 second frame, 203 shaft, 204 swing member, 205 second elastic element, 206 push button, 207 third elastic element, 208 shoulder, 209 hole, 210 protrusion, 211 hook, 212 plate-shaped member;

[0050] 300 blade, 301 mounting hole;

[0051] 400 is a posture switching member, 401 is a positioning protrusion, 402 is a first elastic element, 403 is an axis hole, and 404 is a shifting member. DETAILED DESCRIPTION

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0057] like Figure 1-6 The multifunctional utility knife shown in the figure comprises a handle 100, a knife holder 200 and a blade 300. The handle 100 is used for holding, and is assembled from a first handle body 101 and a second handle body 102, and an installation space is formed between the first handle body and the second handle body. In the assembled state, the back (upper edge) of the handle 100 is provided with a slit 112 extending in the front-to-back direction, and a stop structure is provided along the slit, and the stop structure shown in the figure is three stop grooves 113 provided on the upper edge of the first handle body 101. The inner wall of the first handle body 101 is provided with a first slideway extending in the front-to-back direction, and the first slideway is in the shape of a groove.

[0058] The tool holder 200 is located in the installation space between the first handle body 101 and the second handle body 102 and is configured to move forward and backward. In addition, a push button 206 is configured on the tool holder 200. The lower end of the push button 206 is inserted into the tool holder 200 and is exerted with an upward elastic force by the third elastic element 207. The push button 206 uses the elastic force of the third elastic element 207 to make its shoulder 208 embed into the corresponding gear slot to position the tool holder in the handle during the forward and backward movement. The push button 206 extends out of the handle through the slit 112 for operation. Therefore, by pressing the push button 206 downward to overcome the elastic force of the third elastic element 207, the shoulder 208 of the push button is withdrawn from the gear slot 113, and the push button 206 can be pushed to move the tool holder 200 forward and backward to the corresponding gear slot. The push button is released, and the push button 206 is positioned in the corresponding gear slot again under the elastic force of the third elastic element 207. The three gear slots in the figure are generally configured as follows: when the push button is positioned at the last gear slot, the blade 300 is retracted into the handle for storing the utility knife; when the push button is positioned at the first gear slot, the blade extends out of the handle for a longer length. Figure 1-6 That is, when the push button is located in the middle gear slot, the blade extends out of the handle by a shorter length. Moreover, the spacing between adjacent gear slots can be equal or unequal. The three gear slots limit the travel of the knife holder moving forward and backward.

[0059] like Figure 5-6 as well as Figure 16-23As shown, in the present invention, the tool holder 200 includes a first frame 201 and a second frame 202 that are constrained together, that is, the tool holder is a split structure. Specifically, the second frame 202 and the first frame 201 are provided with a shaft 203 and a hole 209, and the shaft 203 extends into the hole 209 to enable the second frame to rotate relative to the first frame when it is not constrained. The second frame is switched between the first posture and the second posture by rotating the second frame relative to the first frame. Figure 1-6 , Figure 11-12 as well as Figure 16-19 The second frame is shown in a first posture. Figure 13-15 as well as Figure 20-23 The second frame is shown in a second posture.

[0060] The blade 300 is mounted on the second frame 202 to change its direction as the second frame switches its posture. When the blade holder is located at the posture change position, the handle of the blade is exposed for use.

[0061] In view of the split structure of the tool holder, the movement and positioning of the tool holder are configured as follows: the first frame 201 cooperates with the first slide 103 of the first handle body 101, and the second tool holder 202 cooperates with the second slide 104 of the second handle body 102. The push button 206 is configured on the first frame 201. Accordingly, the tool holder 200 is configured to be movable forward and backward on the handle 100 and can be positioned on the handle. Moreover, in order to guide the tool holder to move forward and backward, the first frame 201 is slidably matched with the first slide 103 during the entire stroke of the tool holder moving forward and backward.

[0062] There is a posture change position in the forward and backward movement of the tool holder, which is located at the extreme position of the tool holder 200 moving forward relative to the handle 100, that is, the push button 206 is located at the position of the frontmost gear slot 113. When the tool holder is at the posture change position, the second frame 202 is allowed to switch between the first posture and the second posture. This is achieved by dividing the second slide 104 into two sections: the second slide 104 includes a first slide 105 provided on the second handle body 102 and a second slide 106 provided on the posture switching member 400. When the tool holder is located at the posture changing position, the second frame 202 slides in cooperation with the second slide 106 and disengages from the sliding cooperation with the first slide 105. Therefore, the posture switching member 400 can change the posture of the second frame 202 without being constrained by the first slide 105. When the tool holder 200 deviates from the posture changing position, the second frame 202 slides in cooperation with the first slide 105. Then, the second frame 202 is guided and constrained by the first slide 205 and can only slide along the first slide 205 but cannot be changed by the posture switching member 400. In other words, when the second frame 202 is switched to the first posture, the first section of the slideway 105 and the second section of the slideway 106 are in the same direction and extend in the same direction to form a complete second slideway 104, and the second frame 202 can move forward and backward relative to the handle together with the first frame 201. When the second frame 202 is switched to the first posture and deviates from the posture change position, the second frame 202 is matched with the first section of the slideway 105, and when the posture switching member 400 wants to rotate the second frame 202 to the switching position, it is blocked by the first section of the slideway 105 and prevents the second frame from switching to the second posture, or the second section of the slideway 106 on the posture switching member 400 is disengaged from the second frame 202 and does not transmit its movement to the second frame. When the second frame 202 is switched to the second posture, the second section of the slideway 106 is misaligned with the first section of the slideway 105, and when the second frame 202 wants to move forward and backward, it is blocked by the second section of the slideway 106, thereby preventing the entire tool holder from moving forward and backward.

[0063] like Figure 6 As shown, the first slideway 105 and the second slideway 106 are both groove-shaped, and the second slideway 106 changes direction as the attitude switching member 400 rotates. A protrusion 210 is provided on the left side of the second frame 202, and the protrusion 210 is located in the corresponding slideway to realize the action requirements of the second frame sliding forward and backward or switching attitudes.

[0064] The posture switching member 400 is rotatably arranged on the handle 100. In the illustrated structure, the shaft hole 403 of the posture switching member 400 is sleeved on the shaft section 114 on the second handle body 102. The handle 100 is provided with an arc hole 107, and the posture switching member 400 is exposed from the arc hole 107. According to this, the posture switching member can be manipulated by fingers when holding the handle. As shown in the figure, the posture switching member 400 is a component, and the part exposed from the handle is a dial 404, which is regarded as a component of the posture switching member. The dial 404 is inserted into the posture switching member 400, and the second handle body 102 and the dial 404 are separately provided with a positioning protrusion 401 and a positioning groove 108. The positioning protrusion 401 is located in the positioning groove 108 by the elastic force of the first elastic element 402 to position the posture switching member on the handle. Accordingly, when the tool holder is in the posture changing position, the posture switching member 400 and the second frame 202 are connected through the cooperation of the second section of the slide 106 and the protrusion 210 to switch the second frame between the first posture and the second posture, and the second frame 202 is maintained in the first posture or the second posture by positioning the posture switching member 400 on the handle.

[0065] For ease of assembly, the handle 100 includes a fixing member 109 , the posture switching member 400 is constrained between the second handle body 102 and the fixing member 109 , and the first section of the slideway 105 is disposed on the fixing member 109 .

[0066] A swingable support member 110 is mounted on the handle 100 through the shaft, and the support member 110 is in the shape of a rod. When the second frame 202 switches to the second posture, the support member 110 supports the second frame here to prevent the second frame from rotating. A pin 111 is provided on the support member 110, and when the support member supports the second frame in the second posture, the pin 111 locks the support member relative to the handle. The pin 111 moves forward and backward and is assembled on the support member 110, and an elastic force is applied forward by the fourth elastic element 115 to resist the handle and lock the support member in the supporting position. A push member 116 is connected to the pin, and pushing the push member backward can overcome the elastic force of the fourth elastic element 115 to unlock the lock on the support member.

[0067] The blade 300 can be replaced and assembled on the second frame 202 for replacement. Specifically, the second frame 202 is equipped with a blade changing structure. When the second frame is switched to the first posture and the handle is extended, the blade changing structure is exposed. The blade changing structure includes a swinging member 204. The middle part of the swinging member 204 is swingably arranged on the second frame 202, and the upper end of the swinging member 204 is exposed outside the second frame. A hook 211 is provided at the lower end of the swinging member 204 and is hooked in the blade mounting hole 301 by the elastic force of the second elastic element 205 to lock the blade. When the blade is to be replaced, the upper end of the swinging member 204 is pushed to the right to make the swinging member 204 swing and the hook 211 at the lower end of the swinging member escape from the blade mounting hole 301 to unlock the blade, so that the blade can be pulled out from the second frame and a new blade can be inserted. In order to facilitate assembly, the second frame is composed of two plate-like components 212 that are placed side by side and fastened together, and the swinging member and the second elastic element are placed between the two plate-like components.

[0068] As mentioned before, a versatile utility knife such as Figure 1-2 and Fig.11 In the state shown, the blade 300 is extended out of the handle 100 for cutting, and in this state, the second frame is in the first posture. The push button 206 can be operated to move the blade holder 200 backward, and the blade 300 can be retracted into the handle 100 for storage. Figure 14-15 , Figure 22-23 In the state shown, the second frame is in the second posture and can be used as a scraper or a shovel. When you want to scrape off debris attached to the surface, the entire blade edge can be made to fit the surface to prevent the tip of the blade from piercing the surface, thereby maintaining a better posture, effectively avoiding scratching the surface, and being easy to use.

[0069] Want to Figure 1-2 and Fig.11 The blade in the shown state can be switched to another use state by the following operations:

[0070] (1) From Fig.11 , Figure 16-17 In the state shown, the support member 110 is flipped to move it away from the support position to Fig.12 , Figure 18-19 The state shown gives way to the rotation of the second frame;

[0071] (2) From Fig.12 , Figure 18-19 In the state shown, the second frame 202 is rotated by operating the posture switching member 400, so that the second frame 202 is rotated to Fig.13 , Figure 20-21 The second posture shown;

[0072] (3) From Fig.13 , Figure 20-21 In the state shown, the support member 110 is flipped over to make it reach the supporting position. Figure 14-15 , Figure 22-23 At this point, the utility knife can be used as a spatula or scraper.

[0073] Desire Figure 14-15 , Figure 22-23 When the blade is put into the handle in the state shown in FIG. 1 , the second frame 202 with the blade 300 is restored to the position in the reverse operation sequence described above. Fig.11 , Figure 16-17 In the state shown, the entire tool holder can be moved backward by operating the push button 206.

[0074] The illustrated structure shows a preferred embodiment, in which the posture of the second frame is switched by operating the posture switching member, but the utility model is not limited to the illustrated embodiment. In other embodiments, the posture switching member is eliminated, one end of the blade is pressed against an object and force is applied to the handle to make the handle and the second frame rotate relative to each other, and the second frame can also be switched between the first posture and the second posture.

Claims

1. A multifunctional utility knife, characterized by include: A handle for holding (100), A tool holder (200) is arranged on the handle (100) so as to move forward and backward and has a posture change position in the movement stroke, the tool holder comprises a first frame body (201) and a second frame body (202) constrained together, the second frame body is allowed to switch between a first posture and a second posture when the tool holder is located at the posture change position, the second frame body is arranged to move forward and backward relative to the handle together with the first frame body when the second frame body switches to the first posture, and the second frame body is prevented from switching to the second posture when the second frame body deviates from the posture change position, and the tool holder is prevented from moving forward and backward when the second frame body switches to the second posture; The blade (300) is mounted on the second frame (202) to change its direction as the posture of the second frame is switched, and the blade exposes the handle when the blade holder is located at the posture change position.

2. The multifunctional utility knife according to claim 1, characterized in that: The posture change position is located at the extreme position of the tool holder moving forward relative to the handle.

3. The multifunctional utility knife according to claim 1, characterized in that: The second frame (202) is connected to the first frame (201) via a shaft (203), and the shaft is used to switch the second frame between a first posture and a second posture.

4. The multifunctional utility knife according to claim 1, characterized in that: A posture switching member (400) is disposed on the handle (100); when the tool holder (200) is located at the posture changing position, the posture switching member (400) is connected to the second frame (202) to switch the second frame between the first posture and the second posture.

5. The multifunctional utility knife according to claim 4, characterized in that: A second slideway (104) is provided in the handle (100), the second slideway comprising a first slideway (105) provided on the handle (100) and a second slideway (106) provided on the posture switching member (400); when the tool holder (200) is located at the posture changing position, the second frame (202) slidably cooperates with the second slideway (106) and disengages from the slidable cooperation with the first slideway (105); when the tool holder (200) deviates from the posture changing position, the second frame (202) slidably cooperates with the first slideway (105).

6. The multifunctional utility knife according to any one of claims 1 to 5, characterized in that: A first slideway (103) is provided in the handle (100), and the first frame body (201) is slidably matched with the first slideway (103) during the entire travel of the tool holder moving forward and backward.

7. The multifunctional utility knife according to claim 4 or 5, characterized in that: The posture switching member (400) is rotatably disposed on the handle (100).

8. The multifunctional utility knife according to claim 7, characterized in that: The handle (100) is provided with an arc hole (107), and the posture switching member (400) is exposed from the handle (100) through the arc hole (107).

9. The multifunctional utility knife according to claim 4 or 5, characterized in that: When the tool holder (200) is located at the posture change position, the posture switching member (400) is positioned on the handle to keep the second holder (202) in the first posture or the second posture.

10. The multifunctional utility knife according to claim 9, characterized in that: A positioning protrusion (401) and a positioning groove (108) are separately provided on the handle (100) and the posture switching member (400); the positioning protrusion is located in the positioning groove by the elastic force of the first elastic element (402) to position the posture switching member on the handle.

11. The multifunctional utility knife according to claim 4 or 5, characterized in that: The handle (100) comprises a fixing member (109), and the posture switching member (400) is constrained between the handle (100) and the fixing member (109).

12. The multifunctional utility knife according to any one of claims 1 to 5, characterized in that: A swingable support member (110) is disposed on the handle (100); when the second frame (202) is switched to a second posture, the support member (110) supports the second frame (202) thereon to prevent the second frame from rotating.

13. The multifunctional utility knife according to claim 12, characterized in that: A pin (111) is provided on the support member (110), and when the support member (110) supports the second frame (202) in a second posture, the pin (111) locks the support member (110) relative to the handle.

14. The multifunctional utility knife according to any one of claims 1 to 5, characterized in that: The second frame (202) is provided with a tool changing structure, and when the second frame is switched to the first posture and the handle is extended, the tool changing structure is exposed.

15. The multifunctional utility knife according to claim 14, characterized in that: The blade changing structure comprises a swinging member (204), the middle part of which is swingably arranged on the second frame (202), the upper end of which is exposed outside the second frame (202), and the lower end of which is locked with the blade (300) by the elastic force of the second elastic element (205).

16. The multifunctional utility knife according to any one of claims 1 to 5, characterized in that: A push button (206) is arranged on the first frame (201); a slit (112) extending in the front-rear direction is arranged on the handle (100); and a stop structure is arranged along the slit; the push button (206) extends out of the handle through the slit (112) and cooperates with the stop structure to position the tool holder on the handle during the forward and backward movement.

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