Anti-pinch structure of multifunctional saw

Abstract

An anti-pinch structure of a multifunctional saw relates to the field of safety of electric tools and comprises a functional saw body and a saw head, and the saw head is provided with a cam, an elastic body, an operating handle, a supporting rod, a supporting surface and a rotating rod. A first notch and a second notch which are used for limiting the supporting rod are formed in the operating handle; the supporting rod is in a first position when making contact with the supporting face in the second notch, the supporting rod is in a second position when making contact with the supporting face in the first notch, and the first position and the second position do not coincide. The locking process of the supporting rod is divided into a first position when the supporting rod makes contact with the supporting face in the second notch and a second position when the supporting rod makes contact with the supporting face in the first notch, so that the locking process is divided into two position processes, and the problem of clamping injury in the locking process is avoided.

Description

Technical Field

[0001] This application belongs to the field of power tool safety technology, specifically relating to a multi-functional saw anti-pinch hand structure. Background Technology

[0002] This technical solution is an improvement based on the utility model with patent number 201820389575.0 and patent name "Quick-change structure of a multi-functional saw".

[0003] The locking mechanism of the multi-functional saw is a cam-locking mechanism. When the locking mechanism switches from releasing to locking, the operating handle suddenly accelerates back to the locked position during the latter half of the locking process under the action of the spring, which can easily pinch fingers between the operating handle and the saw head. In view of this, this technical solution provides a method that divides the locking process of the operating handle into two processes, reducing the problem of fingers being pinched between the operating handle and the saw head due to the sudden acceleration of the operating handle back to the locked position during the latter half of the locking process. Summary of the Invention

[0004] The purpose of this application is to provide a multifunctional saw anti-pinch structure that can solve the safety problem during the locking process.

[0005] This application provides a multifunctional saw anti-pinch hand structure, characterized in that it includes:

[0006] The multi-functional saw body and saw head are equipped with a cam, an elastic body, an operating handle, a support rod, a support surface and a rotating rod on the saw head;

[0007] The operating handle is provided with a first slot and a second slot for limiting the position of the support rod; the support rod is in the first position when it contacts the support surface in the second slot, and the support rod is in the second position when it contacts the support surface in the first slot, and the first position and the second position do not coincide.

[0008] The first and second slots are connected and have the same width, allowing the support rod to slide smoothly between them. The width of the first and second slots is equal to the diameter of the support rod.

[0009] An elastic body is provided between the operating handle and the support rod. The elastic body is compressed when the support rod slides from the second slot to the first slot.

[0010] The support rod has an anti-slip coating at both ends to increase friction. The length of the first groove is greater than the length of the second groove. The length of the support rod is greater than the width of the operating handle. The support surface is coated with a wear-resistant coating to increase wear resistance.

[0011] This technical solution mainly divides the locking process of the support rod into two positions: the first position when the support rod contacts the support surface in the second slot, and the second position when the support rod contacts the support surface in the first slot. This separates the locking process into two positions, thus avoiding the problem of pinching during the locking process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a multi-functional saw disclosed in an embodiment of this application;

[0013] Figure 2 yes Figure 1 Enlarged view of part A;

[0014] Figure 3 This is a partial cross-sectional schematic diagram of the saw head disclosed in the embodiments of this application;

[0015] Figure 4 This is a 3D schematic diagram of the operating handle and support rod;

[0016] Figure 5 This is a schematic diagram of the first position;

[0017] Figure 6 This is a diagram of the second position;

[0018] Figure 7 This is a diagram comparing the width of the operating handle and the support rod;

[0019] Explanation of reference numerals in the attached figures:

[0020] Functional saw body 100; saw head 200; cam 210; elastic body 220; operating handle 230; first slot 231; second slot 232; support rod 240; support surface 250; rotating rod 260. Detailed Implementation

[0021] Example

[0022] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] The following description, in conjunction with the accompanying drawings, details a multifunctional saw anti-pinch structure provided in this application through specific embodiments and application scenarios.

[0024] refer to Figure 1-7 This application provides a multi-functional saw anti-pinch structure, characterized in that it includes: a multi-functional saw body 100 and a saw head 200, such as... Figure 2-6As shown, the saw head 200 includes a cam 210, an elastic body 220, an operating handle 230, a support rod 240, a support surface 250, and a rotating rod 260; the operating handle 230 drives the cam 210 to rotate around the rotating rod 260, thereby achieving the purpose of locking and unlocking.

[0025] like Figure 5-6 As shown, the operating handle 230 is provided with a first groove 231 and a second groove 232 for limiting the position of the support rod 240. When the support rod 240 contacts the support surface 250 in the second groove 232, it is in the first position. When the support rod 240 contacts the support surface 250 in the first groove 231, it is in the second position. The first position is the protective position, and the second position is the locking position. The first position and the second position do not coincide. From the first position to the second position, the operator needs to manually push both ends of the support rod 240 so that the operating handle 230 returns to the locking position of the second position. At this time, the operating handle 230 is almost parallel to the multi-functional saw body 100.

[0026] The first slot 231 is connected to the second slot 232, allowing the support rod 240 to slide smoothly between the first slot 231 and the second slot 232. Figure 2-3 As shown, there should be a "bend" between the first slot 231 and the second slot 232, so that under normal conditions, the support rod 240 is difficult to slide from the second slot 232 to the first slot 231 without external force.

[0027] An elastic body 220 is provided between the operating handle 230 and the support rod 240. The elastic body 220 is compressed when the support rod 240 slides from the second slot 232 to the first slot 231. The elastic body 220 has a buffering and restoring function, such as… Figure 3 As shown, at this time, the support rod 240 returns to the position of the second slot 232 under the action of the elastic body 220. The elastic body 220 can also compensate for manufacturing errors and assembly gaps between components to a certain extent, ensuring the operational stability of the entire structure. For example, during long-term use, due to wear and other reasons, the fit between the operating handle 230 and the support rod 240 may become somewhat loose. At this time, the elastic body 220 can adjust the relative position between the two through its own elastic deformation, so that the support rod 240 is always tightly attached to the slot on the operating handle 230, maintaining good working performance. The elastic body 220 is preferably a spring.

[0028] To further enhance the reliability of the support rod 240, both ends of the support rod 240 are coated with an anti-slip coating. This anti-slip coating is made of rubber or polymer materials and features a high coefficient of friction, wear resistance, and corrosion resistance. In practical applications, the anti-slip coating effectively increases the friction between the support rod 240 and the fingers, preventing positional shifts caused by slippage during operation. By prying the two ends of the support rod 240 with the fingers, the support rod 240 slides from the second slot 232 to the first slot 231, allowing the operating handle 230 to return to the second position, which is the locked position. Simultaneously, the anti-slip coating also reduces wear between the support rod 240 and the support surface 250, extending its service life.

[0029] The length of the first slot 231 is greater than the length of the second slot 232. This determines the travel distance and function of the support rod 240 within the different slots. Within the first slot 231, due to its longer length, the support rod 240 has greater movement space, enabling more flexible adjustment and locking operations.

[0030] The length A of the support rod 240 is greater than the width a of the operating handle 230. This allows the support rod 240 to slide and be positioned stably on the operating handle 230. When the support rod 240 slides on the operating handle 230, its longer length provides better stability and balance, preventing tilting or jamming due to uneven force. Simultaneously, this dimensional relationship ensures that when the support rod 240 enters the first slot 231 or the second slot 232, the operator's fingers have sufficient space to drag the support rod 240 from the second slot 232 to the first slot 231. This ensures accurate contact with the inner wall of the slot and the support surface 250, achieving reliable limiting and locking functions.

[0031] The support surface 250 is coated with a wear-resistant coating. The support surface 250 needs to withstand the pressure of the support rod 240 and frequent friction. The wear-resistant coating can greatly improve the durability of the support surface 250 and effectively reduce wear caused by long-term friction. The wear-resistant coating is preferably a ceramic coating.

[0032] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multi-purpose saw anti-pinch structure, characterized by, The utility model relates to a multifunctional saw body, a saw head, a first slot and a second slot, a support rod, a support surface and a rotating rod. The first slot and the second slot are in communication, so that the support rod slides between the first slot and the second slot. The support rod is coated with a non-slip coating on both ends. The length of the first slot is greater than the length of the second slot.

2. The multi-functional saw anti-pinch structure of claim 1, wherein, The length of the support rod is greater than the width of the handle.

3. The multi-functional saw anti-pinch structure of claim 2, wherein, The support surface is coated with a wear-resistant coating.

4. The multi-functional saw anti-pinch structure of claim 3, wherein, ​ 5. The multi-functional saw anti-pinch structure of claim 1, wherein, ​ 6. The multi-functional saw anti-pinch structure of claim 5, wherein, ​ 7. The multi-functional saw anti-pinch structure of claim 1, wherein, ​

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