Telescopic cutter

Abstract

The telescopic cutter comprises a cutter holder, a cutter body and a connecting rod assembly, a containing cavity with one end open is formed in the cutter holder, a sliding rail is arranged in the containing cavity, the sliding rail is provided with a stroke center position, the cutter body is movably arranged on the sliding rail, the connecting rod assembly comprises a connecting rod and a first elastic piece, and the connecting rod is movably arranged in the containing cavity and rotationally connected with the cutter body. The connecting rod is elastically connected with the first elastic piece, the cutter body slides along the sliding rail under the action of external force, the first elastic piece is compressed to accumulate elastic force before the cutter body crosses the stroke center position, and after the cutter body crosses the stroke center position, the first elastic piece releases the elastic force to push the cutter body to slide to a cutter outlet state or a cutter collecting state. According to the telescopic cutter, the opening and closing operation of the cutter is simplified, rapid stretching and retracting of the cutter body are achieved through simple pushing and pressing, and the operation efficiency of the cutter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tools, in particular to a telescopic tool. Background Art

[0002] Existing hand-held tools are mainly divided into structures such as sheath type, rotary folding type and track push-pull type. Although these designs meet the daily cutting needs to a certain extent, they have significant common defects in the opening and closing operations. Sheath type tools usually require manual drawing out of the tool from the sheath and inserting it into the sheath, which not only increases the operation time, but also may affect the work efficiency when the opening and closing state needs to be quickly switched, and it is difficult to adapt to various usage scenarios and requirements. Rotary folding type tools provide a way to open and close by rotation, but require the operator to have certain operation skills and need the components to rotate in place to complete the opening and closing, with a slow speed, and are not suitable for situations that require quick response. Track push-pull type tools provide a way to open and close by manual pushing and pulling, but the process of manually pushing and pulling the tool body to extend or retract requires a long time, and the requirement of quickly opening and closing the tool cannot be achieved.

[0003] The opening and closing operation efficiency of the above three types of tools is low, which not only increases the time cost of using the tool, but also in the usage scenarios that require frequent and quick switching of the tool opening and closing state, the existing tools cannot meet the high-efficiency usage requirements. Summary of the Utility Model

[0004] An object of the utility model is to provide a telescopic tool to solve the problem of low opening and closing operation efficiency of existing tools.

[0005] A telescopic tool includes:

[0006] A tool holder, which forms a receiving cavity with an open end. A slide rail is arranged in the receiving cavity. The slide rail has a travel center position, and the travel center position divides the slide rail into a connected first slide rail and a second slide rail;

[0007] A tool body, which is movably arranged on the slide rail. The tool body has a knife-out state of extending out of the opening and a knife-in state of retracting into the receiving cavity;

[0008] A connecting rod assembly, including a connecting rod and a first elastic member. The connecting rod is movably arranged in the receiving cavity and is rotatably connected to the tool body. The connecting rod is elastically connected to the first elastic member;

[0009] Under the action of an external force, the tool body slides along the slide rail. Before the tool body crosses the travel center position, the first elastic member is compressed to accumulate elastic force. When the tool body crosses the travel center position, the first elastic member releases the elastic force to push the tool body to slide to the knife-out state or the knife-in state.

[0010] In one embodiment, the shapes of the tool body and the slide rail are both arc-shaped; a guide groove is formed on one side of the tool holder, the guide groove communicates with the opening, a convex block is formed on one side of the tool body, and the convex block passes through the guide groove and is exposed outside the tool holder.

[0011] In one embodiment, a plurality of connecting rods are provided, at least two of the connecting rods are connected to the first elastic member, and the plurality of connecting rods are sequentially rotatably connected through a connecting rod shaft to form a multi-link structure, and two ends of the multi-link structure are respectively rotatably connected to the tool body and the tool holder.

[0012] In one embodiment, the first elastic member is a torsion spring, the torsion spring includes a plurality of spiral portions, and each spiral portion is sleeved on a connecting rod shaft so that the torsion spring is elastically connected to the plurality of connecting rods.

[0013] In one embodiment, a rotation-stopping tooth protrudes from one side of the connecting rod, the rotation-stopping tooth is in a sleeve shape, and the spiral portion of the torsion spring is sleeved on the outer periphery of the rotation-stopping tooth.

[0014] In one embodiment, the telescopic tool further includes:

[0015] A limiting component, which is arranged in the accommodating cavity;

[0016] A control component, which includes a key and a second elastic member, one end of the key is rotatably connected to the tool holder, the other end is drivingly connected to the limiting component, and two ends of the second elastic member are elastically abutted against the key and the tool holder.

[0017] In one embodiment, the limiting component includes a limiting block and a guiding column, the limiting block is provided with a limiting hole, the guiding column passes through the limiting hole, and two ends of the guiding column are connected to the tool holder.

[0018] In one embodiment, the surfaces of the limiting block and the key in contact with each other are both inclined surfaces; and / or,

[0019] A relief groove is formed on the inner wall of the accommodating cavity, and the limiting block is in clearance fit with the groove wall of the relief groove; press the key to push the limiting block to move axially along the guiding column into the relief groove.

[0020] In one embodiment, the inner wall of the slide rail has a lubricating glue layer, and the lubricating glue layer is a Teflon glue.

[0021] In one embodiment, the telescopic tool further includes a bearing, the bearing is installed at one end of the tool body away from the opening and is movably arranged in the slide rail so that the tool body is movably connected to the slide rail.

[0022] As can be seen from the above technical solutions, the embodiments of the present utility model have at least the following advantages and positive effects:

[0023] The retractable tool of the embodiment of the present utility model includes a tool holder, a tool body and a connecting rod assembly. The tool holder forms a receiving cavity with an open end. A slide rail is provided in the receiving cavity. The slide rail has a stroke center position. The tool body is movably arranged on the slide rail. The connecting rod assembly includes a connecting rod and a first elastic member. The connecting rod is movably arranged in the receiving cavity and is rotatably connected to the tool body. The connecting rod is elastically connected to the first elastic member. Under the action of an external force, the tool body slides along the slide rail. Before the tool body crosses the stroke center position, the first elastic member is compressed to store elastic force. When the tool body crosses the stroke center position, the first elastic member releases the elastic force to push the tool body to slide to the tool-out state or the tool-in state. The retractable tool proposed in this application simplifies the opening and closing operation of the tool, realizes the rapid retraction and extension of the tool body through simple pushing, and improves the operation efficiency of the tool. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is a schematic structural diagram of the retractable tool of the present utility model;

[0026] Figure 2 is Figure 1 an exploded structural diagram of the retractable tool shown;

[0027] Figure 3 It is a schematic internal structural diagram of the retractable tool of the present utility model with the tool body fully retracted;

[0028] Figure 4 It is a schematic internal structural diagram of the retractable tool of the present utility model with the tool body partially extended;

[0029] Figure 5 It is a schematic internal structural diagram of the retractable tool of the present utility model with the tool body fully extended;

[0030] Figure 6 is Figure 5 a second perspective state diagram of the retractable tool shown;

[0031] Figure 7 is Figure 6 an enlarged structural diagram of area A in the retractable tool shown;

[0032] Figure 8This is a schematic structural diagram of the connecting rod in the telescopic tool of the present utility model.

[0033] The description of the reference numerals in the drawings is as follows:

[0034] 10. Telescopic tool; 100. Tool holder; 200. Tool body; 300. Connecting rod assembly; 400. Limiting assembly; 500. Control assembly; 600. Bearing; 700. Inclined plane;

[0035] 110. Accommodation cavity; 111. Opening; 112. Avoidance groove; 120. Slide rail; 121. Stroke center position; 130. Guide groove; 140. Portable hole; 210. Protrusion; 310. Connecting rod; 311. Limiting portion; 320. First elastic member; 321. Spiral portion; 330. Connecting rod shaft; 410. Limiting block; 411. Limiting hole; 420. Guide post; 510. Button; 520. Second elastic member. Detailed implementation manners

[0036] Typical implementation manners reflecting the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various changes in different implementation manners, all of which do not depart from the scope of the present utility model, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present utility model.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0038] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "arranged", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] First, please refer to Figures 1 to 7 , wherein, Figure 3 shows the knife-out state where the tool body 200 of the telescopic tool 10 is fully extended, Figure 5 shows the knife-retracting state where the tool body 200 of the telescopic tool 200 is fully retracted.

[0040] The present utility model provides a telescopic tool 10, which is convenient to carry and can be used for outdoor activity cutting tasks or for playing and relieving stress in leisure time. The telescopic tool 10 includes: a tool holder 100, a tool body 200, a connecting rod assembly 300, a limiting assembly 400 and a control assembly 500. The tool holder 100 forms a receiving cavity 110 with an opening 111 at one end, and a slide rail 120 is provided in the receiving cavity 110; the tool body 200 is movably arranged on the slide rail 120, and the tool body 200 has a knife-out state where it extends out of the opening 111 and a knife-in state where it retracts into the receiving cavity 110; the connecting rod assembly 300 includes a connecting rod 310 and a first elastic member 320. The connecting rod 310 is movably arranged in the receiving cavity 110 and is rotatably connected to the tool body 200. The connecting rod 310 is elastically connected to the first elastic member 320; the limiting assembly 400 is arranged in the receiving cavity 110; the control assembly 500 includes a key 510 and a second elastic member 520. One end of the key 510 is rotatably connected to the tool holder 100, and the other end is drivingly connected to the limiting assembly 400. The two ends of the second elastic member 520 are elastically abutted against the key 510 and the tool holder 100.

[0041] Specifically, referring to Figure 4 , the slide rail 120 has a stroke center position 121. Under an external force, the tool body slides along the slide rail 120. Before the tool body 200 crosses the stroke center position 121, the first elastic member 320 is compressed to accumulate elastic force. After the tool body 200 crosses the stroke center position 121, the first elastic member 320 releases the elastic force to push the tool body 200 to slide to the knife-out state or the received state.

[0042] The knife-out process of the tool body 200: The initial state is the Figure 3 shown knife-in state. Push the tool body 200 to slide along the slide rail 120 and move towards the opening 111. At this time, the first elastic member 320 is compressed to accumulate elastic force, as shown in Figure 4 . Continue to push the tool body 200 to move along the slide rail 120 and cross the stroke center position 121. At this time, the first elastic member 320 releases the elastic force to push the tool body 200 to continue sliding to the Figure 5 shown knife-out state. The state change process of the telescopic tool 10 is from Figures 3 to 4 to Figure 5 .

[0043] The knife-in process of the tool body 200: The initial state is the Figure 5 shown knife-in state. Push the tool body 200 to slide along the slide rail and move in a direction away from the opening 111. At this time, the first elastic member 320 is compressed to accumulate elastic force, as shown in Figure 4 . Continue to push the tool body 200 to move along the slide rail 120 and reversely cross the stroke center position 121. At this time, the first elastic member 320 releases the elastic force to push the tool body 200 to continue sliding to the Figure 3 shown knife-in state. The state change process of the telescopic tool 10 isFigures 5 to 4 to Figure 3 。

[0044] It can be understood that in this embodiment, when the telescopic tool 10 is in the tool retracted state and the tool extended state, the first elastic member 320 is in an elastically abutted state, that is, the link assembly 300 has a limiting effect on the tool body 200 in the tool retracted state and the tool extended state to prevent the tool body 200 from moving. At this time, the limiting assembly 400 and the control assembly 500 may not be provided, and the first elastic member 320 is used to show the limitation of the tool body 200. Of course, the manufacturer can also freely adjust the state of the first elastic member 320 in the tool extended state and the tool retracted state according to needs.

[0045] It should be noted that the over-travel center position 121 in this application refers to the connection between the link assembly 300 and the tool body 200 crossing the over-travel center position 121. The over-travel center position 121 is not limited to the center position of the slide rail 120, and the position of the over-travel center position 121 is determined by the relative positions of the link assembly 300 and the tool body 200.

[0046] In this embodiment, the inner wall of the slide rail 120 has a lubricating glue layer, and the lubricating glue layer is a Teflon glue. The Teflon glue has the advantages of chemical corrosion resistance, fire and flame retardance, and long service life. It can be understood that in other embodiments, the Teflon glue can also be replaced with other glues or glue layers.

[0047] In this embodiment, the design of the tool holder 100 not only provides a space for accommodating the tool body 200 and installing various components, but also facilitates the user's holding and operation, ensuring the stability and safety of the operation. The tool holder 100 can be made of materials such as aluminum alloy or stainless steel, making it corrosion-resistant and lightweight. The tool holder 100 is composed of two shells with exactly the same shape and size, and the two shells can be connected in a detachable manner such as by screws, pins or snaps, so as to facilitate the disassembly, replacement and repair of various components of the telescopic tool 10. A portable hole 140 is provided at one end of the tool holder 100 far away from the opening 111. The portable hole 140 not only provides an additional holding point to make the holding more stable, but also provides the convenience of hanging or fixing the tool, facilitating the user to easily hang the tool on a hook or tie it to a belt.

[0048] The tool body 200 can be slidably connected to the slide rail 120 through a bearing 600, or sliders and chutes are respectively provided on the tool body 200 and the slide rail 120, and the sliders are matched with the chutes to realize the sliding connection between the tool body 200 and the slide rail 120. The slide rail 120 not only provides sliding guidance for the tool body 200, but also limits the sliding of the tool body 200 to ensure that the tool body 200 moves along a preset movement trajectory during the telescopic process, so as to improve the stability of tool extension.

[0049] The knife body 200 can be made of stainless steel, alloy steel or ceramic material, making it have good hardness and wear resistance. A pushing member is provided on the knife body 200. The user pushes the pushing member to drive the knife body 200 to move, making it more labor-saving and convenient to move the knife body 200. The size of the accommodating cavity 110 is larger than that of the knife body 200. When the knife body 200 is in the retracted state, the knife body 200 is completely inside the accommodating cavity 110, improving the safety of operation.

[0050] The design that the knife body 200 is rotatably connected to the knife holder 100 through the connecting rod 310 makes the knife body 200 move more stably relative to the knife holder 100 along the slide rail 120.

[0051] At the connection between the limiting component 400 and the knife body 200, clamping structures such as clamping grooves, clamping buckles or clamping blocks can be set, and the clamping connection between the knife body 200 and the limiting component 400 is realized through these clamping structures. The limiting component 400 is arranged on the moving path of the knife body 200 and is arranged at a position close to the opening 111 of the accommodating cavity 110, so that when the knife body 200 is clamped with the limiting component 400, the knife body 200 is at the maximum extended length, providing the maximum cutting length and improving the efficiency of the cutting work.

[0052] The key 510 is exposed outside the knife holder 100, making it easy for the user to touch and operate, so as to facilitate the user to quickly start the telescopic movement of the tool. The second elastic member 520 is a spring. The key 510 is provided with a spring groove (not marked). One end of the spring is embedded in the spring groove, and the other end abuts against the limiting block 410. The spring groove has the effect of limiting the spring, preventing the spring from having a lateral displacement during the compression process and improving the stability when the spring deforms. In addition to the pressing structure in which the key 510 in this application cooperates with the elastic member to realize the separation of the limiting component 400 and the knife body 200, structures such as sliding type, rolling type, rotating type, etc. can also be used to unlock the limiting component 400 and the knife body 200.

[0053] When the knife is extended, the knife body 200 is pushed to move along the slide rail 120 until the knife body 200 extends out of the opening 111 of the accommodating cavity 110. At this time, the knife body 200 is clamped with the limiting component 400, so that the knife body 200 is in the extended state. The first elastic member 320 accumulates elastic force first and then releases elastic force in this process. When retracting the knife, press the key 510 of the control component 500 to compress the second elastic member 520 to drive the limiting component 400 to separate from the knife body 200. As the limiting component 400 separates, the user can pull the knife body 200 in the reverse direction and drive the connecting rod 310 to drive the knife body 200 to retract into the accommodating cavity 110. The telescopic tool 10 proposed in this application simplifies the opening and closing operation of the tool, realizes the quick extension and retraction of the knife body 200 through a simple push and pull, and improves the operation efficiency of the tool.

[0054] Reference Figures 3 to 5, the shapes of the tool body 200 and the slide rail 120 are both arc-shaped; a guide groove 130 is provided on one side of the tool holder 100, the guide groove 130 communicates with the opening 111, a convex block 210 is provided on one side of the tool body 200, the convex block 210 passes through the guide groove 130 and is exposed outside the tool holder 100. Push the convex block 210 to make the tool body 200 move along the slide rail 120 and extend out of the opening 111.

[0055] In this embodiment, the tool body 200 and the slide rail 120 are designed with the same radian, ensuring that the tool body 200 maintains consistent contact and smooth movement with the slide rail 120 when moving along the slide rail 120, thereby improving the telescopic performance and service life of the tool.

[0056] The extending direction of the guide groove 130 is the same as the moving direction of the tool body 200, so as to facilitate pushing the convex block 210 extending out of the guide groove 130 to drive the tool body 200 to move along the slide rail 120. The size of the guide groove 130 should be slightly larger than the size of the convex block 210, leaving enough space to ensure that the convex block 210 can slide smoothly, while avoiding excessive gaps that cause the convex block 210 to shake. The convex block 210 is located on the side of the tool body 200 away from the opening 111 in the knife retracted state, so that it is more convenient and labor-saving for the user to push the tool body 200.

[0057] Reference Figures 1 to 5 , the shape of the telescopic tool 10 is in the shape of an eagle's claw. In this embodiment, the eagle's claw shape design provides a shape that is more in line with the natural grip of the human hand, increasing the comfort and stability during gripping and also being more labor-saving. Compared with the straight and cylindrical handle designs, the eagle's claw shape design increases the contact area between the tool and the hand, thus providing better stability during operation and reducing the possibility of the tool sliding or shifting.

[0058] Reference Figures 2 to 5 , there are multiple connecting rods 310, at least two connecting rods 310 are connected to the first elastic member 320, and the multiple connecting rods 310 are sequentially rotatably connected through a connecting rod shaft 330 to form a multi-link structure. The two ends of the multi-link structure are respectively rotatably connected to the tool body 200 and the tool holder 100. In the knife retracted state, the first elastic member 320 drives the multi-link structure to contract to drive the tool body 200 to retract into the accommodation cavity 110.

[0059] In this embodiment, the first elastic member 320 can be a torsion spring or a spring. There are four connecting rods 310, and the first elastic member 320 can be elastically connected to each connecting rod 310, so that the elastic force of the first elastic member 320 is more evenly distributed on each connecting rod 310 and acts on the tool body 200, thereby avoiding overload or damage that may be caused by the force being concentrated on a single connecting rod 310, and thus enhancing the stability and reliability of the entire connecting rod assembly 300. It is also possible to elastically connect some of the connecting rods 310 to the first elastic member 320. In other embodiments, the number of connecting rods 310 can also be three or five.

[0060] The multi-link structure provides an efficient and stable power transmission method for the retractable tool 10. When the user performs the tool retraction operation, the synchronous movement of the multi-link structure enables the tool body 200 to retract smoothly and evenly into the accommodation cavity 110. This design significantly reduces the uneven load or stress concentration that may be generated by a single connecting rod 310, thereby reducing the tool wear and failure rate.

[0061] Refer to Figures 2 to 5 , the first elastic member 320 is a torsion spring, and the torsion spring includes a plurality of spiral portions 321. Each spiral portion 321 is sleeved on a connecting rod shaft 330, so that the torsion spring is elastically connected to the plurality of connecting rods 310.

[0062] In this embodiment, the torsion spring can provide a high-elasticity output in a small space, which is very suitable for applications with limited space. When applied to the structure of the multi-link, it not only saves space but also provides the necessary power for the link 310. The torsion spring can be designed into different shapes, sizes, and wire diameters to adapt to various application requirements. For example, in this application, the torsion spring is designed to have multiple spiral portions 321, and each spiral portion 321 is formed by spirally winding an elastic metal. The spiral portion 321 is sleeved on the link shaft 330, and the link shaft 330 plays a limiting role on the torsion spring to improve the stability of the torsion spring during the deformation process. On one side of the link 310, a stop tooth 311 protrudes. The stop tooth 311 is in the shape of a sleeve and is sleeved on the outer periphery of the link shaft 330. At this time, the spiral portion 321 of the torsion spring is sleeved on the outer periphery of the stop tooth 311. When two rotatably connected links 310 rotate to a certain angle, the stop teeth 311 on the two links 310 abut against each other and restrict each other's rotation, so as to play a limiting role on the rotation of the link 310, preventing problems such as the tool body 200 being stuck or the tool body 200 being disengaged from the restriction of the tool holder 100 due to the excessive rotation angle of the link 310, thereby improving the reliability of the tool during use. The two spiral portions 321 are connected by a straight-line elastic metal. By providing multiple spiral portions 321, when each link 310 rotates, it will be subjected to the elastic force of the first elastic member 320, so that no matter whether the tool body 200 is in the retracted state or the deployed state, the multiple links 310 are all subjected to the elastic force of the first elastic member 320, so as to improve the stability of the multi-link structure during rotation.

[0063] Reference Figures 2 to 5 , the limiting component 400 includes a limiting block 410 and a guide post 420. The limiting block 410 is provided with a limiting hole 411. The guide post 420 passes through the limiting hole 411, and both ends of the guide post 420 are connected to the tool holder 100; in the deployed state, the limiting block 410 is clamped with the tool body 200; by pressing the button 510, the button 510 abuts against the limiting block 410 and pushes the limiting block 410 to move along the axial direction of the guide post 420, so that the limiting block 410 is separated from the tool body 200, and the tool body 200 retracts into the accommodation cavity 110.

[0064] In this embodiment, the limiting block 410 and the guiding column 420 can be made of high-strength metal or engineering plastics to provide the required strength and durability. The shape of the limiting block 410 can be designed to match the contact surface of the tool body 200 to ensure that when the tool body 200 extends, the limiting block 410 and the tool body 200 have the largest contact area, so as to improve the stability of the clamping connection between the limiting block 410 and the tool body 200. The limiting block 410 can adopt an internal rib design to increase its structural stiffness and durability, and prevent deformation or damage during repeated use. The connection between the guiding column 420 and the tool holder 100 can adopt a threaded connection or a snap connection to ensure the stability and reliability during the use of the tool. The threaded connection allows for quick disassembly and maintenance, while the snap connection provides the convenience of quick connection without tools.

[0065] By providing a limiting hole 411 on the limiting block 410, the guiding column 420 can be accurately positioned on the limiting block 410, ensuring that the tool body 200 moves along a predetermined trajectory when extending and retracting. The edge of the limiting hole 411 can be designed with a chamfer or a fillet to reduce the wear of the guiding column 420. At the same time, the cooperation of the limiting hole 411 and the guiding column 420 provides a stable guiding mechanism, reducing the wobbling or deviation of the tool during use and improving the accuracy of use.

[0066] Reference Figures 6 to 7 , the surfaces of the limiting block 410 and the key 510 that are in contact with each other are both inclined surfaces 700. In this embodiment, when retracting the tool, the key 510 is pressed. The design of the inclined surface 700 makes the moving direction of the key 510 and the separating direction of the limiting block 410 form an angle, so that a part of the force of the key 510 is converted into the force to push the limiting block 410. Therefore, by setting the surfaces of the limiting block 410 and the key 510 that are in contact with each other as inclined surfaces 700, the user only needs a very small force to easily start the tool retraction, making the tool retraction more labor-saving and efficient. At the same time, the inclined surface 700 also helps to smooth the movement of the key 510 and reduce the friction between the limiting block 410 and the inclined surface 700, making the tool retraction process more smooth.

[0067] Reference Figure 3 , an avoidance groove 112 is provided on the wall of the accommodation cavity 110, and the limiting block 410 is in clearance fit with the wall of the avoidance groove 112; the key 510 is pressed to push the limiting block 410 to move axially along the guiding column 420 into the avoidance groove 112.

[0068] In this embodiment, there is a certain gap between the avoidance groove 112 and the limiting block 410, enabling the limiting block 410 to slide smoothly within the avoidance groove 112. Meanwhile, the friction and wear between the limiting block 410 and the avoidance groove 112 are avoided, thereby prolonging the service life of the tool. When the key 510 is pressed to push the limiting block 410 to move axially along the guiding column 420, the avoidance groove 112 plays a role in guiding the movement of the limiting block 410, ensuring that the limiting block 410 can move smoothly to the desired position and also preventing the limiting block 410 from colliding with or interfering with other components during movement. In addition, the introduction of the avoidance groove 112 simplifies the maintenance and assembly process of the tool. Since the avoidance groove 112 provides a moving avoidance space for the limiting block 410, it is easier to disassemble and reinstall when performing maintenance or replacing the limiting block 410, reducing the maintenance time and cost.

[0069] Reference Figures 2 to 5 , the telescopic tool 10 further includes a bearing 600. The bearing 600 is installed at one end of the tool body 200 away from the opening 111 and is movably disposed within the slide rail 120, so that the tool body 200 is movably connected to the slide rail 120.

[0070] In this embodiment, the bearing 600 is a ball bearing 600. The ball bearing 600 is composed of an inner ring, an outer ring, and spherical balls disposed between the inner ring and the outer ring. The low-friction characteristic of the ball bearing 600 enables the tool body 200 to be telescoped quickly and easily, reducing the friction and noise during the telescoping of the tool body 200, thereby improving the response speed of the tool and the smoothness of operation. In other embodiments, the bearing 600 can also be replaced with components such as balls and rollers, and the effect of quickly and easily telescoping the tool body 200 can also be achieved.

[0071] Reference Figures 2 to 5 , four bearings 600 are provided. The four bearings 600 are all movably disposed within the slide rail 120, and one bearing 600 is rotatably connected to the connecting rod 310.

[0072] In this embodiment, by providing four bearings 600 and symmetrically arranging the four bearings 600 on both sides of the tool body 200 respectively, not only the stability and support of the tool body 200 within the slide rail 120 are enhanced, but also a more uniform load distribution is achieved. This structural design helps to reduce the inclination or offset of the tool body 200 that may be caused by uneven load, ensures the stable movement of the tool body 200 during telescoping, and improves the cutting accuracy and the overall performance of the tool.

[0073] One of the bearings 600 is rotatably connected to the connecting rod 310, providing higher flexibility for the connecting rod assembly 300. This connection method allows the connecting rod 310 to rotate freely during the telescopic process, reducing the friction and wear generated by the contact between the connecting rod 310 and the tool body 200 or the slide rail 120. This not only extends the service life of the tool, but also makes the operation smoother and reduces the required maintenance work. Combining the above-described embodiments of the connecting rod assembly 300, when the bearing 600 is provided on the tool body 200, one helical portion 321 of the torsion spring can be sleeved on the bearing 600 to achieve the rotational connection between the tool body 200 and the connecting rod 310.

[0074] Although the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A telescopic tool, characterized in that, Comprising: A tool holder, which forms a receiving cavity with an opening at one end. A slide rail is provided in the receiving cavity, and the slide rail has a stroke center position. A tool body, which is movably arranged on the slide rail. The tool body has a tool - out state where it extends out of the opening and a tool - retracted state where it retracts into the receiving cavity. A connecting rod assembly, including a connecting rod and a first elastic member. The connecting rod is movably arranged in the receiving cavity and is rotatably connected to the tool body. The connecting rod is elastically connected to the first elastic member. Under the action of an external force, the tool body slides along the slide rail. Before the tool body crosses the stroke center position, the first elastic member is compressed to store elastic force. When the tool body crosses the stroke center position, the first elastic member releases the elastic force to push the tool body to slide to the tool - out state or the tool - retracted state.

2. The telescopic tool according to claim 1, wherein The shapes of the tool body and the slide rail are both arc - shaped. A guide groove is provided on one side of the tool holder, and the guide groove communicates with the opening. A convex block is provided on one side of the tool body, and the convex block passes through the guide groove and is exposed outside the tool holder.

3. The telescopic cutter according to claim 1, characterized in that, There are multiple connecting rods. At least two of the connecting rods are connected to the first elastic member. The multiple connecting rods are sequentially rotatably connected through a connecting rod shaft to form a multi - connecting - rod structure. The two ends of the multi - connecting - rod structure are respectively rotatably connected to the tool body and the tool holder.

4. The telescopic tool according to claim 3, characterized in that, The first elastic member is a torsion spring. The torsion spring includes multiple spiral parts, and each spiral part is sleeved on a connecting rod shaft so that the torsion spring is elastically connected to the multiple connecting rods.

5. The telescopic tool according to claim 4, characterized in that, A rotation - stopping tooth protrudes from one side of the connecting rod. The rotation - stopping tooth is in a sleeve shape, and the spiral part of the torsion spring is sleeved on the outer periphery of the rotation - stopping tooth.

6. The telescopic tool according to claim 1, characterized in that The telescopic tool further includes: A limiting component, which is arranged in the receiving cavity. A control component, including a button and a second elastic member. One end of the button is rotatably connected to the tool holder, and the other end is drivingly connected to the limiting component. The two ends of the second elastic member are elastically abutted against the button and the tool holder.

7. The telescopic tool according to claim 6, characterized in that, The limiting component includes a limiting block and a guide post. The limiting block is provided with a limiting hole, and the guide post passes through the limiting hole, and both ends of the guide post are connected to the tool holder.

8. The telescopic tool according to claim 7, characterized in that, The surfaces of the limiting block and the button that are in contact are both inclined planes; and / or An avoidance groove is provided on the cavity wall of the receiving cavity. The limiting block is in clearance fit with the groove wall of the avoidance groove. Press the button to push the limiting block to move axially along the guide post into the avoidance groove.

9. The telescopic tool according to any one of claims 1-8, characterized in that The inner wall of the slide rail has a lubricating glue layer, and the lubricating glue layer is Teflon glue.

10. The telescopic tool according to any one of claims 1-8, characterized in that, The telescopic tool further includes a bearing. The bearing is installed at one end of the tool body away from the opening and is movably arranged in the slide rail so that the tool body is movably connected to the slide rail.

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