Work machine

Abstract

To suppress a substrate case in which recessed parts are not formed at corner parts from being mounted on a case mounting part in a wrong attitude.SOLUTION: A work machine comprises a substrate case and a case mounting part on which the substrate case is mounted when sliding the substrate case in a first direction. The substrate case has a rectangular shape having a long side extending in a second direction that is orthogonal to the first direction, when viewed in the first direction in a state where the case is mounted on the case mounting part, which comprises a first corner part and a second corner part arranged adjacent to the first corner part in the second direction. The case mounting part comprises a first corresponding corner part that corresponds to the first corner part and a second corresponding corner part that corresponds to the second corner part when the substrate case is mounted on the case mounting part. At least either of the first corner part and the second corner part is chamfered or rounded. A shape of the first corner part is different from a shape of the second corner part.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a work machine. [Background technology]

[0002] Patent Document 1 discloses a working machine. The working machine includes a motor, a working unit operated by the motor, a control board that controls the motor, a board case that holds the control board therein, and a case attachment part to which the board case is attached when the board case is slid in a first direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-137542 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned working machine, the board case may be attached to the case attachment part in an incorrect position. In order to prevent the board case from being attached to the case attachment part in an incorrect position, for example, a recess may be formed in the corner of the board case. However, in this configuration, the contact area between the control board and the board case is larger than in a configuration in which the recess is not formed in the corner of the board case. This reduces the mounting area in which components can be mounted on the control board. The present specification aims to provide a technology that can prevent a board case that does not have a recess formed in the corner from being attached to the case attachment part in an incorrect position. [Means for solving the problem]

[0005] This specification discloses a working machine. The working machine includes a motor, a working unit operated by the motor, a control board that controls the motor, a board case that holds the control board inside, and a case mounting part to which the board case is attached when the board case is slid in a first direction. When the board case is attached to the case mounting part and viewed in the first direction, the board case has a rectangular shape with long sides extending in a second direction perpendicular to the first direction, and includes a first corner and a second corner adjacent to the first corner in the second direction. When the board case is attached to the case mounting part, the case mounting part includes a first corresponding corner that faces the first corner and a second corresponding corner that faces the second corner. The first corresponding corner has a shape that corresponds to the first corner. The second corresponding corner has a shape that corresponds to the second corner. At least one of the first corner and the second corner is chamfered or rounded. The shape of the first corner is different from the shape of the second corner.

[0006] In this specification, different shapes refer to corners that have been treated and corners that have not been treated, and / or corners that have been treated in different types, and / or corners that have been treated in the same type but have different dimensions. According to the above configuration, the substrate case is attached to the case attachment part in a state where the first corner faces the first corresponding corner and the second corner faces the second corresponding corner. On the other hand, in a state where the first corner faces the second corresponding corner and the second corner faces the first corresponding corner, the first corner interferes with the second corresponding corner or the second corner interferes with the first corresponding corner. This makes it impossible to attach the substrate case to the case attachment part. This makes it possible to prevent the substrate case from being attached to the case attachment part in an incorrect position. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a side view of the working machine 2 of the embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the control unit 10 and the case mounting portion 20 of the embodiment. [Diagram 3] 2 is a top cross-sectional view of the control unit 10 and the case mounting portion 20 of the embodiment. FIG. [Figure 4] FIG. 2 is a side view of the control unit 10 and case mounting portion 20 of the embodiment when the control unit 10 is mounted in the correct position on the case mounting portion 20. [Diagram 5] 1 is a cross-sectional view of a first corresponding corner portion 54 and a first corner portion 86 in the control unit 10 and the case mounting portion 20 of the embodiment. [Figure 6] 11 is a cross-sectional view of the control unit 10 and the case mounting portion 20 at the second corresponding corner portion 56 and the second corner portion 88 in the embodiment. FIG. [Figure 7] 11 is a cross-sectional view of the control unit 10 and the case mounting portion 20 at a third corresponding corner portion 58 and a third corner portion 90 in the embodiment. FIG. [Figure 8] 11 is a cross-sectional view of the control unit 10 and the case mounting portion 20 at a fourth corresponding corner portion 60 and a fourth corner portion 92 in the embodiment. FIG. [Figure 9] FIG. 2 is a rear cross-sectional view of the control unit 10 according to the embodiment. [Figure 10] 1 is a side view of the control unit 10 and case mounting portion 20 of the embodiment when the control unit 10 is mounted to the case mounting portion 20 in an incorrect position. [Figure 11] 1 is a side view of the control unit 10 and case mounting portion 20 of the embodiment when the control unit 10 is mounted to the case mounting portion 20 in an incorrect position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Representative and non-limiting examples of the present invention are described in detail below with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing the preferred examples of the present invention, and is not intended to limit the scope of the present invention. Additionally, the additional features and inventions disclosed can be used separately or together with other features and inventions to provide further improved work machines, methods of making and using the same.

[0009] In addition, the combinations of features and steps disclosed in the following detailed description are not essential for implementing the present invention in the broadest sense, but are specifically described only to illustrate representative embodiments of the present invention. Furthermore, the various features of the following representative embodiments and the various features described in the claims do not have to be combined in the exact manner of the embodiments described herein or in the order listed in order to provide additional and useful embodiments of the present invention.

[0010] All features described in the specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the specific features described in the original disclosure and claims, apart from the configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose intermediate configurations thereof as limitations to the specific features described in the original disclosure and claims.

[0011] In one or more embodiments, the substrate case may further include a third corner adjacent to the second corner in a third direction perpendicular to the first and second directions, and a fourth corner adjacent to the first corner in the third direction. The case attachment part may further include a third corresponding corner facing the third corner and a fourth corresponding corner facing the fourth corner when the substrate case is attached to the case attachment part. The third corresponding corner may have a shape corresponding to the third corner. The fourth corresponding corner has a shape corresponding to the fourth corner. The shape of the third corner may be different from the shape of the second corner, and / or the shape of the fourth corner may be different from the shape of the first corner.

[0012] According to the above configuration, the substrate case is attached to the case attachment part in a state where the first corner portion faces the first corresponding corner portion, the fourth corner portion faces the fourth corresponding corner portion, the second corner portion faces the second corresponding corner portion, and the third corner portion faces the third corresponding corner portion. On the other hand, in a state where the first corner portion faces the fourth corresponding corner portion and the fourth corner portion faces the first corresponding corner portion, the second corner portion faces the third corresponding corner portion, and the third corner portion faces the second corresponding corner portion, the first corner portion interferes with the fourth corresponding corner portion, the fourth corner portion interferes with the first corresponding corner portion, the second corner portion interferes with the third corresponding corner portion, or the third corner portion interferes with the second corresponding corner portion. This makes it impossible to attach the substrate case to the case attachment part. This makes it possible to prevent the substrate case from being attached to the case attachment part in an incorrect orientation.

[0013] In one or more embodiments, the shape of the first corner may be different from the shape of the third corner and / or the shape of the second corner may be different from the shape of the fourth corner.

[0014] According to the above configuration, it is possible to further prevent the board case from being attached to the case attachment portion in an incorrect orientation.

[0015] In one or more embodiments, the width of the case attachment portion may decrease in the first direction.

[0016] According to the above configuration, when the board case is slid in the first direction relative to the case mounting part in an incorrect orientation, the board case cannot slide in the first direction relative to the case mounting part during mounting, which makes it easy to recognize that the board case is mounted in an incorrect orientation on the case mounting part.

[0017] In one or more embodiments, the board case may include a seat on which the control board is seated. The seat may be disposed in a partial area of ​​the board case in the first direction.

[0018] According to the above configuration, it is possible to prevent the mounting area of ​​the control board from being reduced, compared to a configuration in which the seating portion is disposed over the entire board case in the first direction.

[0019] (Example) As shown in Fig. 1, the working machine 2 is, for example, a handheld chainsaw. The working machine 2 includes a housing 4, a guide bar 6, a motor 8, a control unit 10, and a working part 12. The housing 4 is made of a resin material. In the following, when the working machine 2 is placed on a surface P such as the ground, a direction perpendicular to the surface P is referred to as an up-down direction, a direction in which the longitudinal direction of the guide bar 6 is projected onto the surface P is referred to as a front-rear direction, and a direction perpendicular to the up-down direction and the front-rear direction is referred to as a left-right direction.

[0020] The guide bar 6 has a long and narrow plate shape and is fixed to the housing 4 so as to protrude forward from the housing 4.

[0021] The motor 8 is disposed inside the housing 4. The motor 8 is, for example, a brushless motor. The motor 8 is operated by power supplied from a battery pack BP. A motor shaft 8a of the motor 8 extends in the left-right direction.

[0022] The control unit 10 is disposed inside the housing 4. The control unit 10 is disposed along a plane including the front-rear and left-right directions. The control unit 10 controls the motor 8.

[0023] The working unit 12 includes a sprocket 14 and a saw chain 16. The sprocket 14 is disposed inside the housing 4. The sprocket 14 is fixed to the right end of the motor shaft 8a. The sprocket 14 rotates when the motor 8 rotates.

[0024] The saw chain 16 is stretched across the sprocket 14 and the guide bar 6. When the sprocket 14 rotates, the saw chain 16 is driven to rotate along the periphery of the sprocket 14 and the guide bar 6. In this way, an object to be cut, such as wood, is cut.

[0025] As shown in FIG. 2, the work machine 2 further includes a case mounting part 20. The case mounting part 20 is disposed inside the housing 4 (see FIG. 1). The case mounting part 20 protrudes in the left-right direction from the inner surface of the housing 4. Note that in FIG. 2, the inner surface of the housing 4 is indicated by dot hatching. The case mounting part 20 is made of a resin material. The case mounting part 20 is formed integrally with the housing 4.

[0026] The case mounting portion 20 includes a base portion 22, a first rail portion 24, and a second rail portion 26. The base portion 22 extends in the front-rear direction. The base portion 22 includes a central base portion 30 extending along a plane including the front-rear direction and the up-down direction, an upper base portion 32 extending leftward from an upper end of the central base portion 30, and a lower base portion 34 extending leftward from a lower end of the central base portion 30.

[0027] The first rail portion 24 includes a first central rail 38, a first upper rail 40, and a first lower rail 42. The first central rail 38 extends generally in the left direction from the front end of the central base 30. The first upper rail 40 extends generally in the left direction from the front end of the upper base 32. The first upper rail 40 protrudes rearward from the upper end of the first central rail 38. The first lower rail 42 extends generally leftward from the front end of the lower base 34. The first lower rail 42 protrudes rearward from the lower end of the first central rail 38.

[0028] The second rail portion 26 includes a second central rail 46, a second upper rail 48, and a second lower rail 50. The second central rail 46 extends substantially leftward from the rear end of the central base 30. As shown in Fig. 3, a front surface 46a of the second central rail 46 faces a rear surface 38a of the first central rail 38 in the front-rear direction. A width L1 between the rear surface 38a of the first central rail 38 and the front surface 46a of the second central rail 46 in the front-rear direction gradually increases as it moves away from the base 22 (toward the left).

[0029] 2, the second upper rail 48 extends generally leftward from the rear end of the upper base 32. The second upper rail 48 protrudes forward from the upper end of the second central rail 46. The second upper rail 48 and the first upper rail 40 protrude in directions approaching each other.

[0030] The second lower rail 50 extends generally leftward from the rear end of the lower base 34. The second lower rail 50 protrudes forward from the lower end of the second central rail 46. The second lower rail 50 and the first lower rail 42 protrude in directions approaching each other.

[0031] As shown in FIG. 4, a first corresponding corner 54 is formed at the connection between the rear surface 38a of the first central rail 38 and the first upper rail 40. A second corresponding corner 56 is formed by filleting at the connection between the front surface 46a of the second central rail 46 and the second upper rail 48. Filleting corresponds to corner processing. A third corresponding corner 58 is formed by filleting at the connection between the front surface 46a of the second central rail 46 and the second lower rail 50. A fourth corresponding corner 60 is formed by filleting at the connection between the rear surface 38a of the first central rail 38 and the first lower rail 42. The first corresponding corner 54, the second corresponding corner 56, the third corresponding corner 58, and the fourth corresponding corner 60 each extend in the left-right direction. The shapes of the first corresponding corner 54, the second corresponding corner 56, the third corresponding corner 58, and the fourth corresponding corner 60 are different from one another. Here, different shapes refer to corners that have been treated and corners that have not been treated, and / or corners that have been treated in different types, and / or corners that have been treated in the same type but have different dimensions. Similarly, similar shapes refer to corners that have been treated in the same type and have the same dimensions.

[0032] As shown in FIG. 5, the first corresponding corner 54 is not subjected to corner treatment. The corner treatment means, for example, rounding the corner and forming a surface. Here, rounding the corner means that the radius of curvature is 0.5 mm or more. Forming a surface means that the dimension of the surface is 0.5 mm or more. As shown in FIG. 6, the second corresponding corner 56 is formed with a surface. As shown in FIG. 7, the third corresponding corner 58 is rounded. As shown in FIG. 8, the fourth corresponding corner 60 is rounded. The radius of curvature of the fourth corresponding corner 60 is larger than the radius of curvature of the third corresponding corner 58.

[0033] As shown in Fig. 2, the control unit 10 includes a control board 64 and a board case 66. The control board 64 has a rectangular flat plate shape. Although not shown, the control board 64 includes a microcomputer and a plurality of switching elements. The switching elements are, for example, IGBTs or MOSFETs. The switching elements are switched between an on state and an off state under the control of the microcomputer. The motor 8 (see Fig. 1) is controlled by switching the switching elements between the on state and the off state.

[0034] The board case 66 holds the control board 64. The board case 66 has a case shape with an open upper end. The board case 66 is attached to the case attachment part 20 by sliding in an attachment direction D1 relative to the case attachment part 20. The board case 66 is removed from the case attachment part 20 by sliding in a removal direction D2 relative to the case attachment part 20. The attachment direction D1 corresponds to the first direction. The attachment direction D1 is the rightward direction. The removal direction D2 is the direction opposite to the attachment direction D1, that is, the leftward direction. The board case 66 is made of a resin material. In a modified example, the board case 66 may be made of a metal material. The board case 66 includes a lower wall 70, a front wall 72, a left wall 74, a rear wall 76, a right wall 78, and a plurality of seating parts 80 (see FIG. 3). The thickness of the lower wall 70, the thickness of the front wall 72, the thickness of the left wall 74, the thickness of the rear wall 76, and the thickness of the right wall 78 are each 5 mm or less, for example, 4 mm. The thickness of the lower wall 70, the thickness of the front wall 72, the thickness of the left wall 74, the thickness of the rear wall 76, and the thickness of the right wall 78 are the same as each other. Hereinafter, the thickness of the lower wall 70, the thickness of the front wall 72, the thickness of the left wall 74, the thickness of the rear wall 76, and the thickness of the right wall 78 may be referred to as the wall thickness of the board case 66.

[0035] The lower wall 70 is disposed along a plane including the front-rear direction and the left-right direction. The lower wall 70 has a rectangular plate shape. The front wall 72, the left wall 74, the rear wall 76, and the right wall 78 protrude upward from the lower wall 70. The front wall 72 extends in the left-right direction above the front end of the lower wall 70. The left wall 74 extends rearward from the left end of the front wall 72 above the left end of the lower wall 70. The rear wall 76 extends rightward from the rear end of the left wall 74 above the rear end of the lower wall 70. The right wall 78 extends forward above the right end of the lower wall 70 from the right end of the rear wall 76 to the right end of the front wall 72.

[0036] As shown in FIG. 3, the seats 80 are surrounded by the front wall 72, the left wall 74, the rear wall 76, and the right wall 78. The seats 80 protrude upward from the lower wall 70. The length of each of the seats 80 in the mounting direction D1 is 20% or less of the length of the board case 66 in the mounting direction D1. Each of the seats 80 is disposed in a partial area of ​​the board case 66 in the mounting direction D1. Each of the seats 80 is not disposed over the entire board case 66 in the mounting direction D1. Each of the seats 80 is disposed near the connection point between the front wall 72 and the left wall 74, near the connection point between the left wall 74 and the rear wall 76, near the connection point between the rear wall 76 and the right wall 78, and near the connection point between the right wall 78 and the front wall 72. 9, the control board 64 is seated on a plurality of seating portions 80. In this way, the control board 64 is held in the board case 66.

[0037] As shown in FIG. 4, when the board case 66 is attached to the case attachment portion 20 and viewed in the attachment direction D1 (see FIG. 2) toward the left wall 74, the board case 66 has a rectangular shape having a long side 66a extending in the second direction D3 and a short side 66b extending in the third direction D4. The second direction D3 is perpendicular to the attachment direction D1. The second direction D3 is the front-rear direction. The third direction D4 is perpendicular to the attachment direction D1 and the second direction D3. When the board case 66 is attached to the case attachment portion 20 and viewed in the attachment direction D1 toward the left wall 74, the board case 66 has four corners, that is, a first corner 86, a second corner 88, a third corner 90, and a fourth corner 92. When the board case 66 is attached to the case attachment portion 20 and viewed in the attachment direction D1 toward the left wall 74, the first corner 86 corresponds to a front upper corner of the board case 66, the second corner 88 corresponds to a rear upper corner of the board case 66, the third corner 90 corresponds to a rear lower corner of the board case 66, and the fourth corner 92 corresponds to a front lower corner of the board case 66. The first corner 86 is disposed at a diagonal position of the third corner 90. The second corner 88 is disposed at a diagonal position of the fourth corner 92. The first corner 86 is adjacent to the second corner 88 in the second direction D3. The third corner 90 is adjacent to the second corner 88 in the third direction D4. The fourth corner 92 is adjacent to the third corner 90 in the second direction D3, and adjacent to the first corner 86 in the third direction D4. The first corner 86, the second corner 88, the third corner 90, and the fourth corner 92 each extend in the mounting direction D1. No recesses are formed in the first corner 86, the second corner 88, the third corner 90, and the fourth corner 92.

[0038] As shown in FIG. 5, when the substrate case 66 is attached to the case attachment portion 20, the first corner portion 86 is disposed opposite the first corresponding corner portion 54. The first corner portion 86 is received by the first corresponding corner portion 54. The first corner portion 86 is not subjected to corner processing. The corner processing means, for example, rounding and chamfering the corner portion. Here, rounding the corner portion means that the radius of curvature is 0.5 mm or more. Also, chamfering means that the chamfer dimension is 0.5 mm or more. The corner processing does not include forming a recess in the corner portion. The first corresponding corner portion 54 has a shape corresponding to the shape of the first corner portion 86. The first corresponding corner portion 54 has a shape along the first corner portion 86. The first corresponding corner portion 54 covers the first corner portion 86.

[0039] As shown in FIG. 6, when the board case 66 is attached to the case attachment portion 20, the second corner portion 88 is disposed opposite the second corresponding corner portion 56. The second corner portion 88 is received in the second corresponding corner portion 56. The second corner portion 88 is subjected to corner processing. The second corner portion 88 is chamfered. The second corresponding corner portion 56 has a shape corresponding to the shape of the second corner portion 88. The second corresponding corner portion 56 has a shape along the second corner portion 88. The second corresponding corner portion 56 covers the second corner portion 88. The chamfer dimension of the second corner portion 88 is 2 mm. The chamfer dimension of the second corner portion 88 is equal to or smaller than the wall thickness of the board case 66. The chamfer dimension of the second corner portion 88 is slightly smaller than the chamfer dimension of the second corresponding corner portion 56. The shape of the second corner portion 88 is different from the shape of the first corner portion 86. Here, different shapes refer to corners that have been treated and corners that have not been treated, and / or corners that have been treated in different types, and / or corners that have the same type of treatment but have different dimensions.

[0040] As shown in FIG. 7, when the substrate case 66 is attached to the case attachment portion 20, the third corner portion 90 is disposed opposite the third corresponding corner portion 58. The third corner portion 90 is received in the third corresponding corner portion 58. The third corner portion 90 is subjected to corner processing. The third corner portion 90 is rounded. The third corresponding corner portion 58 has a shape corresponding to the shape of the third corner portion 90. The third corresponding corner portion 58 has a shape along the third corner portion 90. The third corresponding corner portion 58 covers the third corner portion 90. The radius of curvature of the third corner portion 90 is 1 mm. The radius of curvature of the third corner portion 90 is equal to or smaller than the wall thickness of the substrate case 66. The radius of curvature of the third corner portion 90 is slightly smaller than the radius of curvature of the third corresponding corner portion 58. The shape of the third corner portion 90 is different from the shape of the first corner portion 86 and the shape of the second corner portion 88.

[0041] As shown in FIG. 8, when the board case 66 is attached to the case attachment portion 20, the fourth corner portion 92 is disposed opposite to the fourth corresponding corner portion 60. The fourth corner portion 92 is received in the fourth corresponding corner portion 60. The fourth corner portion 92 is subjected to corner processing. The fourth corner portion 92 is rounded. The fourth corresponding corner portion 60 has a shape corresponding to the shape of the fourth corner portion 92. The fourth corresponding corner portion 60 has a shape along the fourth corner portion 92. The fourth corresponding corner portion 60 covers the fourth corner portion 92. The proposed radius of curvature of the fourth corner portion 92 is 4 mm. The radius of curvature of the fourth corner portion 92 is larger than the radius of curvature of the third corner portion 90. The radius of curvature of the fourth corner portion 92 is equal to or smaller than the wall thickness of the board case 66. The radius of curvature of the fourth corner portion 92 is slightly smaller than the radius of curvature of the fourth corresponding corner portion 60. The shape of the fourth corner portion 92 is different from the shape of the first corner portion 86 , the shape of the second corner portion 88 , and the shape of the third corner portion 90 .

[0042] 2, when mounting the board case 66 to the case mounting portion 20, the right wall 78 is opposed to the base 22 with the front wall 72 facing the front side, the rear wall 76 facing the rear side, and the bottom wall 70 facing downward, and then the board case 66 is slid in the mounting direction D1 relative to the case mounting portion 20. As a result, the first corner 86 faces the first corresponding corner 54, the second corner 88 faces the second corresponding corner 56, the third corner 90 faces the third corresponding corner 58, and the fourth corner 92 faces the fourth corresponding corner 60, so that the board case 66 is mounted to the case mounting portion 20 in the correct posture without getting caught on the case mounting portion 20.

[0043] In contrast, when the left wall 74 is opposed to the base 22 in a position in which the rear wall 76 faces the front, the front wall 72 faces the rear, and the bottom wall 70 faces downward, and then the board case 66 is slid in the mounting direction D1 relative to the case mounting part 20, the second corner 88 faces the first corresponding corner 54, the first corner 86 faces the second corresponding corner 56, the fourth corner 92 faces the third corresponding corner 58, and the third corner 90 faces the fourth corresponding corner 60, as shown in Fig. 10. Since the width L1 of the rear surface 38a of the first central rail 38 and the front surface 46a of the second central rail 46 gradually decreases toward the mounting direction D1, the first corner 86 interferes with the second corresponding corner 56 and the third corner 90 interferes with the fourth corresponding corner 60 while the board case 66 is slid in the mounting direction D1 relative to the case mounting part 20. When the first corner 86 interferes with the second corresponding corner 56 and the third corner 90 interferes with the fourth corresponding corner 60, the board case 66 cannot be slid further in the mounting direction D1 relative to the case mounting part 20. This prevents the board case 66 from being mounted to the case mounting part 20 in an incorrect position.

[0044] In addition, when the left wall 74 is opposed to the base 22 in a posture in which the front wall 72 faces the front side, the rear wall 76 faces the rear side, and the bottom wall 70 faces the upper side, and then the board case 66 is slid in the mounting direction D1 relative to the case mounting part 20, the fourth corner 92 faces the first corresponding corner 54, the third corner 90 faces the second corresponding corner 56, the second corner 88 faces the third corresponding corner 58, and the first corner 86 faces the fourth corresponding corner 60, as shown in Fig. 11. Since the width L1 of the rear surface 38a of the first central rail 38 and the front surface 46a of the second central rail 46 gradually decreases toward the mounting direction D1, the third corner 90 interferes with the second corresponding corner 56 and the first corner 86 interferes with the fourth corresponding corner 60 while the board case 66 is slid in the mounting direction D1 relative to the case mounting part 20. When the third corner 90 interferes with the second corresponding corner 56 and the first corner 86 interferes with the fourth corresponding corner 60, the board case 66 cannot be slid further in the mounting direction D1 relative to the case mounting part 20. This prevents the board case 66 from being mounted to the case mounting part 20 in an incorrect position.

[0045] (effect) The working machine 2 of this embodiment includes a motor 8, a working unit 12 operated by the motor 8, a control board 64 that controls the motor 8, a board case 66 that holds the control board 64 therein, and a case mounting part 20 to which the board case 66 is attached when the board case 66 is slid in a mounting direction D1 (an example of a first direction). When viewed in the mounting direction D1 in a state where the board case 66 is attached to the case mounting part 20, the board case 66 has a rectangular shape having a long side 66a extending in a second direction D3 perpendicular to the mounting direction D1, and includes a first corner 86 and a second corner 88 adjacent to the first corner 86 in the second direction D3. When the board case 66 is attached to the case mounting part 20, the case mounting part 20 includes a first corresponding corner 54 that faces the first corner 86 and a second corresponding corner 56 that faces the second corner 88. The first corresponding corner 54 has a shape that corresponds to the first corner 86. The second corresponding corner 56 has a shape corresponding to the second corner 88. At least one of the first corner 86 and the second corner 88 is chamfered or rounded. The shape of the first corner 86 is different from the shape of the second corner 88.

[0046] According to the above configuration, the board case 66 is attached to the case attachment portion 20 in a state where the first corner portion 86 faces the first corresponding corner portion 54 and the second corner portion 88 faces the second corresponding corner portion 56. On the other hand, in a state where the first corner portion 86 faces the second corresponding corner portion 56 and the second corner portion 88 faces the first corresponding corner portion 54, the first corner portion 86 interferes with the second corresponding corner portion 56 or the second corner portion 88 interferes with the first corresponding corner portion 54. This makes it impossible to attach the board case 66 to the case attachment portion 20. This makes it possible to prevent the board case 66 from being attached to the case attachment portion 20 in an incorrect orientation.

[0047] The substrate case 66 further includes a third corner 90 adjacent to the second corner 88 in a third direction D4 perpendicular to the mounting direction D1 and the second direction D3, and a fourth corner 92 adjacent to the first corner 86 in the third direction D4. The case mounting portion 20 further includes a third corresponding corner 58 facing the third corner 90 and a fourth corresponding corner 60 facing the fourth corner 92 when the substrate case 66 is mounted to the case mounting portion 20. The third corresponding corner 58 has a shape corresponding to the third corner 90. The fourth corresponding corner 60 has a shape corresponding to the fourth corner 92. The shape of the third corner 90 is different from the shape of the second corner 88, and / or the shape of the fourth corner 92 is different from the shape of the first corner 86.

[0048] According to the above configuration, the board case 66 is attached to the case attachment portion 20 in a state where the first corner portion 86 faces the first corresponding corner portion 54 and the fourth corner portion 92 faces the fourth corresponding corner portion 60, the second corner portion 88 faces the second corresponding corner portion 56, and the third corner portion 90 faces the third corresponding corner portion 58. On the other hand, in a state where the first corner portion 86 faces the fourth corresponding corner portion 60 and the fourth corner portion 92 faces the first corresponding corner portion 54, the second corner portion 88 faces the third corresponding corner portion 58, and the third corner portion 90 faces the second corresponding corner portion 56, the first corner portion 86 interferes with the fourth corresponding corner portion 60, the fourth corner portion 92 interferes with the first corresponding corner portion 54, the second corner portion 88 interferes with the third corresponding corner portion 58, or the third corner portion 90 interferes with the second corresponding corner portion 56. This makes it impossible for the substrate case 66 to be attached to the case attachment portion 20. This makes it possible to prevent the substrate case 66 from being attached to the case attachment portion 20 in an incorrect orientation.

[0049] Additionally, the shape of the first corner 86 is different from the shape of the third corner 90 and / or the shape of the second corner 88 is different from the shape of the fourth corner 92 .

[0050] According to the above-described configuration, it is possible to further prevent the board case 66 from being attached to the case attachment portion 20 in an incorrect orientation.

[0051] Moreover, the width L1 of the case mounting portion 20 decreases in the mounting direction D1.

[0052] According to the above configuration, when the board case 66 is slid in the mounting direction D1 relative to the case mounting portion 20 in an incorrect posture, the board case 66 cannot slide in the mounting direction D1 relative to the case mounting portion 20 during mounting. This makes it easy to recognize that the board case 66 is mounted to the case mounting portion 20 in an incorrect posture.

[0053] The board case 66 also includes a seating portion 80 on which the control board 64 is seated. The seating portion 80 is disposed in a partial area of ​​the board case 66 in the mounting direction D1.

[0054] According to the above configuration, it is possible to prevent the mounting area of ​​the control board 64 from being reduced, compared to a configuration in which the seating portion 80 is disposed over the entire board case 66 in the mounting direction D1.

[0055] (Modification) The work machine 2 according to one embodiment may be a work machine other than a chainsaw, for example, a grass cutter, a lawn mower, a hedge trimmer, a blower, a transport vehicle, a snow blower, or a tiller.

[0056] In the substrate case 66 according to one embodiment, the first corner portion 86 may be rounded or chamfered.

[0057] In the board case 66 according to one embodiment, the shape of the first corner portion 86 may be different from the shape of the third corner portion 90, and the shape of the second corner portion 88 may be similar to the shape of the fourth corner portion 92. Alternatively, the shape of the first corner portion 86 may be similar to the shape of the third corner portion 90, and the shape of the second corner portion 88 may be different from the shape of the fourth corner portion 92.

[0058] In the case attachment portion 20 according to one embodiment, the width L1 may be constant in the attachment direction D1.

[0059] In one embodiment, the mounting direction D1 of the substrate case 66 relative to the case mounting portion 20 is not limited to the rightward direction, but may be, for example, the leftward direction, the forward direction, the backward direction, or the downward direction. [Explanation of symbols]

[0060] 2: Work equipment 4: Housing 6: Guide bar 8: Motor 8a: Motor shaft 10: Control unit 12: Working section 14: Sprocket 16: Saw chain 20: Case mounting part 22: Base 24: First rail section 26: Second rail section 30: Central base 32: Upper base 34:Lower base 38: First center rail 38a: Rear 40: First upper rail 42: First lower rail 46: 2nd center rail 46a:Front 48: 2nd upper rail 50: Second lower rail 54: First corresponding corner 56: Second corresponding corner 58: Third corresponding corner 60: 4th corresponding corner 64: Control board 66: Circuit board case 66a: Long side 66b: Short side 70: Lower wall 72: Front wall 74: Left wall 76: Back wall 78: Right wall 80: Seating area 86:1st corner 88:Second corner 90: 3rd corner 92:4th corner BP: Battery pack D1: Installation direction D2: Removal direction D3: Second direction D4: 3rd direction L1: Width P: face

Claims

1. A motor; A working unit operated by the motor; A control board for controlling the motor; a board case that holds the control board therein; a case attachment portion to which the substrate case is attached when the substrate case is slid in a first direction, the substrate case has a rectangular shape having long sides extending in a second direction perpendicular to the first direction when viewed in the first direction while attached to the case attachment portion, and includes a first corner portion and a second corner portion adjacent to the first corner portion in the second direction, the case mounting portion includes a first corresponding corner portion facing the first corner portion and a second corresponding corner portion facing the second corner portion when the substrate case is mounted to the case mounting portion, The first corresponding corner portion has a shape corresponding to the first corner portion, The second corresponding corner portion has a shape corresponding to the second corner portion, At least one of the first corner and the second corner is chamfered or rounded; A work machine, wherein a shape of the first corner portion is different from a shape of the second corner portion.

2. the substrate case further includes a third corner portion adjacent to the second corner portion in a third direction perpendicular to the first direction and the second direction, and a fourth corner portion adjacent to the first corner portion in the third direction, the case mounting portion further includes a third corresponding corner portion facing the third corner portion and a fourth corresponding corner portion facing the fourth corner portion when the substrate case is mounted to the case mounting portion, The third corresponding corner portion has a shape corresponding to the third corner portion, The fourth corresponding corner portion has a shape corresponding to the fourth corner portion, The work machine according to claim 1 , wherein the third corner portion has a different shape than the second corner portion and / or the fourth corner portion has a different shape than the first corner portion.

3. The work machine according to claim 2 , wherein the first corner portion has a different shape than the third corner portion and / or the second corner portion has a different shape than the fourth corner portion.

4. The work machine according to claim 1 , wherein a width of the case attachment portion decreases in the first direction.

5. the board case includes a seating portion on which the control board is seated, The work machine according to claim 1 , wherein the seating portion is disposed in a partial area of ​​the board case in the first direction.

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