An electric circular saw

Abstract

The utility model discloses a kind of electric circular saws, it is related to electric tool field, including saw blade;Shell, the saw blade rotation is arranged on the shell;Base plate, it is hinged with shell and is used to contact with workpiece, at least part of the saw blade extends from the base plate to cut the workpiece;Movable protective cover, it is rotatably arranged on the shell;Angle adjusting part, it is connected with the shell and can make the shell relatively the base plate rotate to adjust the included angle between the saw blade and the base plate;The angle adjusting part includes angle disc, the angle disc is equipped with first angle scale, the movable protective cover is equipped with second angle scale, the first angle scale and the second angle scale are used to show the included angle value between the saw blade and the base plate, the orientation of the first angle scale and the second angle scale is different.The utility model has the advantages of convenient to check saw blade angle and accurate cutting.

Description

Technical Field

[0001] This utility model relates to the field of power tools, specifically to an electric circular saw. Background Technology

[0002] An electric circular saw is a tool that uses an electric motor to drive a circular saw blade through a transmission mechanism to perform sawing operations. It is characterized by safety, reliability, and high work efficiency.

[0003] In actual operation, circular saws need to frequently adjust the cutting angle according to the workpiece design requirements, and the accuracy of angle judgment directly affects processing precision, construction efficiency, and operational safety. In existing technology, a scale is usually set on the angle dial to display the cutting angle of the circular saw blade, but the scale is generally located at the front or side front of the machine housing, which is not easy for users to see when operating the circular saw, resulting in certain visual limitations and affecting cutting precision. Utility Model Content

[0004] This utility model aims to solve one of the technical problems in related technologies to a certain extent. Therefore, this utility model provides an electric circular saw that has the advantages of easy viewing of the saw blade angle and precise cutting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An electric circular saw includes: a saw blade; a housing, the saw blade being rotatably disposed within the housing; a base plate hinged to the housing and used for contacting a workpiece, at least a portion of the saw blade extending from the base plate to cut the workpiece; a movable protective cover rotatably disposed on the housing; and an angle adjustment member connected to the housing and capable of rotating the housing relative to the base plate to adjust the angle between the saw blade and the base plate. The angle adjustment member includes an angle disc with a first angle scale and the movable protective cover with a second angle scale. Both the first and second angle scales are used to display the angle value between the saw blade and the base plate, and the first and second angle scales have different orientations.

[0006] In this application, the angle disc and the movable protective cover are respectively provided with a first angle scale and a second angle scale. Both the first angle scale and the second angle scale are used to indicate the included angle between the saw blade and the substrate. The first angle scale and the second angle scale are oriented in different directions, providing users with multi-view angle reference. Compared with the structure of the prior art where the scale is concentrated in front of or to the side of the circular saw, the circular saw in this application improves the limitation of the viewing angle for angle reading.

[0007] Optionally, the second angle scale includes a plurality of paired second scale lines and second angle values, wherein the second angle value is located on one side of the second scale line.

[0008] By placing the second angle value on one side of the second scale line, the ease of observation when standing is significantly improved. Users can read the angle value within their natural line of sight without having to bend over excessively or adjust their posture.

[0009] Optionally, the second scale line is constructed as an elongated blind hole or an elongated through hole.

[0010] The elongated blind holes create a shadow area through the recessed structure, forming a contrast between light and dark on the surface of the movable protective cover; the through holes utilize light transmission to distinguish the scale lines from the surface of the movable protective cover, thus serving as an indicator and facilitating the observation of angle values.

[0011] Optionally, a sticker is attached to the outer surface of the active protective cover, the second scale line is formed on the sticker, and the color of the sticker is different from the color of the active protective cover.

[0012] Compared to blind holes or through holes, using stickers has lower manufacturing costs, shorter production cycles, and makes it easier to replace scale lines.

[0013] Optionally, the second angle scale is formed on the outer surface of the movable protective cover, and when the movable protective cover covers the lower part of the saw blade, the second angle scale is located on the side of the movable protective cover away from the first angle scale.

[0014] The first and second angle scales are set separately and far apart, which makes it easy for users to observe the angle values ​​from multiple angles when operating the electric circular saw, and adapt to different operating postures.

[0015] Optionally, the first angle scale includes a plurality of paired first scale lines and first angle values, wherein the first angle value is located diagonally below the first scale line, or the first angle value is flush with the first scale line.

[0016] By placing the first angle value diagonally below or at the same level as the first scale line, the ease of observation when standing is improved, and users can read the angle value within their natural line of sight without bending over or adjusting their posture.

[0017] Optionally, the angle plate has an arc-shaped groove, and a pointer passes through the arc-shaped groove and is fixedly connected to the housing.

[0018] The center of the arc groove coincides with the tilting axis of the electric circular saw. When the pointer slides in the arc groove, its displacement directly corresponds to the angle change, which significantly improves the accuracy of the angle indication.

[0019] Optionally, the angle disk is located at the front end of the substrate.

[0020] The angle dial is located at the end of the base plate, with the first angle scale positioned at the end for optimal viewing from the front of the workpiece. The second angle scale is positioned near the rear side of the base plate, allowing users to view the workpiece from behind or above while operating the circular saw (where the user is typically positioned behind the saw), accommodating different operating postures (such as standing or squatting). This dual-scale structure, through spatial functional partitioning and adaptive viewing angle matching, significantly enhances the ease of operation and accuracy of the circular saw. The angle dial transforms abstract angle values ​​into intuitive physical markings via scale lines, allowing users to quickly read the current cutting angle and supporting various cutting needs (such as straight cuts, bevel cuts, and compound angle cuts), thus improving the versatility of the circular saw.

[0021] Optionally, the substrate is provided with a clearance opening, and the saw blade passes through the clearance opening.

[0022] The substrate is provided with a clearance opening through which the saw blade passes, so that the saw blade can extend out of the substrate and cut the workpiece below the substrate, allowing the saw blade to move without interference when cutting at an angle.

[0023] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the electric circular saw of this utility model; Figure 2 This is a schematic diagram of the structure of the movable protective cover of this utility model; Figure 3 This is a structural schematic diagram of the electric circular saw of this utility model from another perspective; Figure 4 for Figure 3 A partial structural diagram viewed from direction A; Figure 5 This is a schematic diagram of another structure of the angle disc of this utility model; Figure 6 for Figure 5 A partial structural diagram viewed from direction B.

[0025] Among them, 1. saw blade; 2. housing; 3. base plate; 31. angle plate; 311. arc groove; 312. pointer; 32. first angle scale; 321. first scale line; 322. first angle value; 33. clearance opening; 4. movable protective cover; 41. second angle scale; 411. second scale line; 412. second angle value; 5. angle adjustment component. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0027] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0028] Example: like Figure 1 As shown in Figure 4, this embodiment provides an electric circular saw, including: a saw blade 1; a housing 2, on which the saw blade 1 is rotatably mounted; a base plate 3, which is hinged to the housing 2 and used to contact a workpiece, and at least part of the saw blade 1 extends out of the base plate 3 to cut the workpiece; a movable protective cover 4, which is rotatably mounted on the housing 2; and an angle adjustment member 5, which is connected to the housing 2 and can cause the housing 2 to rotate relative to the base plate 3 to adjust the angle between the saw blade 1 and the base plate 3. The angle adjustment member 5 includes an angle disc 31, which has a first angle scale 32, and the movable protective cover 4 has a second angle scale 41. Both the first angle scale 32 and the second angle scale 41 are used to display the angle value between the saw blade 1 and the base plate 3, and the first angle scale 32 and the second angle scale 41 have different orientations.

[0029] In this embodiment, the saw blade 1 is used to cut the workpiece. The housing 2 provides structural support for the saw blade 1 and other components such as the motor. The base plate 3 is the plane that contacts the workpiece, and part of the saw blade 1 extends out of the base plate 3 to achieve cutting. The movable protective cover 4 is rotatably disposed on the housing 2 and is used to enclose the saw blade 1 to prevent the saw blade 1 from injuring the user and to prevent debris from flying during cutting. It should be noted that in this embodiment of the circular saw, when the movable protective cover 4 is covering the upper part of the saw blade 1, the lower part of the saw blade 1 is completely exposed for cutting the workpiece. When the movable protective cover 4 is covering the lower part of the saw blade 1, a portion of the lower part of the saw blade 1 is still exposed for cutting the workpiece, but at this time most of the lower part of the saw blade 1 is covered, thus protecting the user to a certain extent. The angle adjustment component 5 connects the housing 2 and the base plate 3 and allows the housing 2 to rotate relative to the base plate 3 to adjust the angle between the saw blade 1 and the base plate 3. The structure of the angle adjustment component 5 in this embodiment can be referenced from the utility model patent with patent number CN215746776U. The angle adjustment component in that patent is basically similar in structure and principle to the angle adjustment component 5 in this application. Since the angle adjustment component 5 is prior art, it will not be described in detail here. The first angle scale 32 is set along the surface of the angle disk 31 for indication. The second angle scale 41 is set on the surface of the movable protective cover 4. The second angle scale 41 and the first angle scale 32 face different directions. That is, if the substrate 3 is used as a reference, the second angle scale 41 and the first angle scale 32 are located on different sides of the substrate 3. This structure can provide users with multi-view angle reference, improving the accuracy of angle reading while improving the limitation of viewing angle.

[0030] The user rotates the housing 2 using the angle adjustment component 5 to form the desired angle (e.g., 0°-45°) between the saw blade 1 and the base plate 3. During adjustment, the first angle scale 32 displays the current angle value in real time (e.g., scale line alignment marks). The movable protective cover 4 rotates synchronously with the saw blade 1, and its second angle scale 41 provides an angle value from a different perspective than the first angle scale 32. For example, when the first angle scale 32 displays "30°", the second angle scale 41 displays the same angle from another perspective, allowing the user to confirm the angle accuracy by comparing the two scales. In other embodiments, the second angle scale 41 can also display a complementary angle from another perspective (e.g., a "60°" residual angle).

[0031] The second angle scale 41 includes a plurality of paired second scale lines 411 and second angle values ​​412. The second angle value 412 is located on one side of the second scale line 411. For example, the second angle value 412 is located diagonally below the second scale line 411, or the second angle value 412 is flush with the second scale line 411.

[0032] In this embodiment, the second angle scale 41 is composed of multiple pairs of second scale lines 411 and second angle values ​​412, used to indicate the angle between the saw blade 1 and the substrate 3. The second scale lines 411 can be made using processes such as laser etching, engraving, or fluorescent coating. In this embodiment, the second angle value 412 is located diagonally below the second scale line 411 (e.g., at a 45° angle). In other embodiments, the second angle value 412 can also be flush with the second scale line 411 (on the same horizontal line). That is, the second angle value 412 is directly marked at the end of the second scale line 411, and the second angle value 412 and the second scale line 411 share the same horizontal reference line, reducing visual interference.

[0033] The second graduation line 411 is constructed as a long strip blind hole or a long strip through hole.

[0034] In this embodiment, the elongated blind hole forms a shadow area through the recessed structure, creating a light-dark contrast with the surface of the movable protective cover 4; the through hole utilizes light transmission to distinguish the scale lines from the surface of the movable protective cover 4, achieving an identification function and facilitating the observation of angle values.

[0035] A sticker is attached to the outer surface of the active protective cover 4, and the second scale line 411 is formed on the sticker. The color of the sticker is different from the color of the active protective cover 4.

[0036] In this embodiment, the sticker is constructed to include a scale layer with elongated scale lines and an adhesive layer for pasting. The adhesive layer ensures that the sticker is firmly attached to the surface of the active protective cover 4, while also supporting residue-free removal and replacement.

[0037] The second angle scale 41 is formed on the outer surface of the movable protective cover 4. When the movable protective cover 4 surrounds the lower part of the saw blade 1, the second angle scale 41 is located on the side of the movable protective cover 4 away from the first angle scale 32.

[0038] In this embodiment, the second angle scale 41 is located on the side of the active protective cover 4 away from the first angle scale 32, that is, the two are far apart, which improves the viewing angle limitation of angle reading, eliminates the problem of numerical obstruction caused by the tilt of the viewing angle of a single scale, and makes it convenient for users to read angle values ​​from multiple angles.

[0039] The first angle scale 32 includes a plurality of paired first scale lines 321 and first angle values ​​322. The first angle value 322 is located diagonally below the first scale line 321, or the first angle value 322 is flush with the first scale line 321.

[0040] In this embodiment, similarly, the first angle scale 32 is composed of multiple pairs of first scale lines 321 and first angle values ​​322, used to indicate the angle between the saw blade 1 and the substrate 3. The first scale lines 321 can be made using processes such as laser etching, engraving, or fluorescent coating. In this embodiment, the first angle value 322 is located diagonally below the first scale line 321. In other embodiments, the first angle value 322 can also be flush with the first scale line 321 (on the same horizontal line). That is, the first angle value 322 is directly marked at the end of the first scale line 321, and the first angle value 322 and the first scale line 321 share the same horizontal reference line, reducing visual interference.

[0041] like Figure 5 and Figure 6 As shown, in other embodiments, an arc-shaped groove 311 can also be provided on the angle plate 31, and a pointer 312 can be inserted into the arc-shaped groove 311. The pointer 312 is fixedly connected to the housing 2. The center of the arc-shaped groove 311 coincides with the tilt axis of the electric circular saw (which rotates around the tilt axis when the electric circular saw is adjusted). When the pointer 312 slides in the arc-shaped groove 311, its displacement directly corresponds to the angle change, which significantly improves the accuracy of the angle indication.

[0042] Angle disk 31 is fixed to the front end of substrate 3.

[0043] In this embodiment, the angle disc 31 is located at the front end of the substrate 3, meaning the first angle scale 32 is located at the front end of the substrate 3, suitable for the user to observe from the front of the workpiece. The second angle scale 41 is located near the rear side of the substrate 3, facilitating observation from the rear or top of the workpiece when operating the circular saw (the user is generally positioned behind the circular saw), adapting to different operating postures (such as standing or squatting). In this embodiment, the angle disc 31 is fixed to the upper surface of the substrate 3 by welding or other methods. It transforms abstract angle values ​​into intuitive physical markings through scale lines, allowing the user to quickly read the current cutting angle and supporting different cutting needs (such as straight cuts, bevel cuts, and compound angle cuts), improving the versatility of the circular saw. In other embodiments, the angle disc 31 can also be integrally formed on the upper surface of the substrate 3 to avoid scale deviations caused by loosening.

[0044] The substrate 3 is provided with a clearance opening 33, and the saw blade 1 is inserted into the clearance opening 33.

[0045] In this embodiment, the substrate 3 is provided with an avoidance opening 33 through which the saw blade 1 passes, so that the saw blade 1 can extend out of the substrate 3 and cut the workpiece below the substrate 3. The width of the avoidance opening 33 is much larger than the thickness of the saw blade 1, which enables the saw blade 1 to move without interference during inclined cutting. In addition, a double layer of protection of hard alloy inserts and elastic protective rings can be used at the edge of the avoidance opening 33 to reduce cutting wear and significantly enhance safety and durability.

[0046] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. An electric circular saw, comprising: Saw blade; The housing, on which the saw blade is rotatably mounted; A base plate, which is hinged to a housing and used to contact a workpiece, wherein at least a portion of the saw blade extends from the base plate to cut the workpiece; A movable protective cover, which is rotatably mounted on the housing; An angle adjustment component is connected to the housing and enables the housing to rotate relative to the substrate to adjust the angle between the saw blade and the substrate; The feature is that the angle adjustment component includes an angle disk, the angle disk is provided with a first angle scale, the movable protective cover is provided with a second angle scale, the first angle scale and the second angle scale are both used to display the included angle value between the saw blade and the substrate, and the first angle scale and the second angle scale have different orientations; The second angle scale is formed on the outer surface of the movable protective cover. When the movable protective cover covers the lower part of the saw blade, the second angle scale is located on the side of the movable protective cover away from the first angle scale.

2. The electric circular saw according to claim 1, characterized in that, The second angle scale includes a plurality of paired second scale lines and second angle values, wherein the second angle value is located on one side of the second scale line.

3. An electric circular saw according to claim 2, characterized in that, The second scale line is constructed as a long strip blind hole or a long strip through hole.

4. The electric circular saw according to claim 2, characterized in that, A sticker is affixed to the outer surface of the movable protective cover, the second scale line is formed on the sticker, and the color of the sticker is different from the color of the movable protective cover.

5. The electric circular saw according to any one of claims 1-4, characterized in that, The first angle scale includes a plurality of paired first scale lines and first angle values, wherein the first angle value is located diagonally below the first scale line, or the first angle value is flush with the first scale line.

6. The electric circular saw according to claim 5, characterized in that, The angle plate has an arc-shaped groove, and a pointer is inserted through the arc-shaped groove. The pointer is fixedly connected to the housing.

7. An electric circular saw according to claim 5, characterized in that, The angle disk is fixed to the front end of the substrate.

8. An electric circular saw according to any one of claims 1-4, characterized in that, The substrate is provided with a clearance opening, and the saw blade passes through the clearance opening.

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