Work Machine

Abstract

To provide a work machine having improved waterproofness and dust resistance.SOLUTION: A work machine includes a substrate, at least one electronic component, at least one slit, and a resin member. The substrate has a first region, a second region, and a third region positioned on a boundary between the first region and the second region. Each of the first region, the second region and the third region has a first surface and a second surface. At least one electronic component is mounted on the first region. At least the one slit is provided in the third region, and has a predetermined shape. The resin member penetrates at least the one slit, and is molded integrally with at least a part of the one electronic component so as to cover the first surface and the second surface of the first region.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a work machine. [Background technology]

[0002] The work machine described in Patent Document 1 includes a display unit having a substrate, an LED, a lens covering the LED, and a lead wire for energizing the LED. The LED and lens are disposed on the front surface of the substrate, and the lead wire is disposed on the back surface of the substrate. The periphery of the lens and the lead wire are covered with an integrally molded resin member. This prevents liquid from entering the lens of the display unit, improving its waterproofing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-93343 A Summary of the Invention [Problem to be solved by the invention]

[0004] The integrally molded resin member is formed by injecting resin into a mold that holds a substrate inside and then curing the injected resin. The portion of the substrate that is used to hold the substrate inside the mold is not covered by the resin member. As a result, a portion of the substrate protrudes from the resin member. At the boundary between the protruding portion of the substrate and the portion covered by the resin member, a gap may occur between the substrate and the resin member due to thermal contraction of the resin member. If many such gaps occur, liquid or dust may enter the covered portion.

[0005] One aspect of the present disclosure provides a work machine with improved waterproof and dustproof properties. [Means for solving the problem]

[0006] One aspect of the present disclosure is a work machine including a substrate, at least one electronic component, at least one slit, and a resin member. The substrate has a first region, a second region, and a third region located at a boundary between the first region and the second region. Each of the first region, the second region, and the third region has a first surface and a second surface. The at least one electronic component is mounted in the first region. The at least one slit is provided in the third region and has a predetermined shape. The resin member is integrally molded so as to pass through the at least one slit and cover a portion of the at least one electronic component and the first surface and the second surface of the first region.

[0007] In one aspect of the present disclosure, a work machine has a substrate, and a slit is provided at the boundary between a first region having at least one electronic component mounted thereon and a second region having no electronic component mounted thereon. A resin member passes through the slit to cover the first surface and the second surface of the first region together with a part of the at least one electronic component. Since the resin member passes through the slit, the boundary between the portion covered by the resin member and the substrate is reduced. Therefore, a work machine with improved waterproofing and dustproofing can be realized.

[0008] The predetermined shape may also be a semicircular arc shape. By forming the slit in a semicircular arc shape, the second region can be effectively used to provide a screw hole or the like.

[0009] The second region may also include at least one screw hole formed in the second region. The predetermined shape may be a semicircular arc shape having a center at one of the at least one screw hole. Since the slit is formed in a semicircular arc shape centered on the screw hole, when a substrate having a first region covered with a resin member is screwed to another member, the resin member does not get in the way and the screwing operation can be performed smoothly.

[0010] In addition, the substrate may include at least one adhesive portion provided in the third region. The resin member may be adhered to the at least one adhesive portion without a resist therebetween. The resin member is bonded to the adhesive part provided at the boundary between the first region and the second region without the resist interposed therebetween, thereby improving the adhesion between the resin member and the adhesive part and further suppressing the intrusion of liquid and dust into the first region.

[0011] The first region may further include a lead wire. The lead wire is electrically connected to the electronic component and is partially covered by the resin member. The first region may include an end portion that is not in contact with the third region. The lead wire may protrude from the resin member on the side of the end portion.

[0012] The lead wire is partially covered with the resin member together with the first region, and protrudes from the resin member at an end of the first region that is not in contact with the third region, so that the lead wire can be drawn out from the first region while preventing liquid and dust from entering the first region.

[0013] [Item 1] A substrate having a first region, a second region, and a third region located at a boundary between the first region and the second region, each of the first region, the second region, and the third region having a first surface and a second surface, and a resist is removed from the first surface of at least the third region; at least one electronic component mounted on the first surface of the first region; a resin member including a resin adhesive portion adhered to the third region, the resin member being integrally molded so as to cover a part of the at least one electronic component and the first surface and the second surface of the first region; Work machine.

[0014] A substrate provided in a work machine according to another aspect of the present disclosure has a third region on a first surface at a boundary between a first region and a second region, where the resist has been removed. The resin member covers the first surface and the second surface of the first region together with a part of at least one electronic component, and is bonded to the third region on the first surface between the first region and the second region. This improves the adhesion between the resin member and the substrate at the end of the resin member adjacent to the second region on the first surface, thereby preventing liquid or dust from entering the at least one electronic component. This results in a work machine with improved waterproofing and dustproofing.

[0015] [Item 2] The third region includes an arc portion having a semicircular arc shape. Item 1. A work implement as described in item 1. By including the arc portion in the third region, the second region can be effectively utilized to provide a screw hole or the like.

[0016] [Item 3] At least one screw hole is formed in the second region; The center of the semicircular arc corresponds to one of the at least one screw holes. Item 2. A work implement as described in item 2.

[0017] Since the center of the semicircular arc corresponds to one of the screw holes, when a substrate having a first region covered with a resin material is screwed to another material, the resin material does not get in the way and the screwing operation can be performed smoothly.

[0018] [Item 4] The arc portion includes a first end and a second end. the third region further includes two rectangular portions each having a rectangular shape extending from the first end and the second end to an end of the substrate; Item 2 or 3. A work machine according to item 2 or 3.

[0019] By providing the third region with two square portions, it is possible to further prevent liquid and dust from entering the inside of the resin member from the edge of the substrate.

[0020] [Item 5] The longitudinal direction of the two rectangular portions coincides with the longitudinal direction of the substrate. The work machine according to item 4. The design of the circuit board becomes easier.

[0021] [Item 6] the resin bonding portion includes a first resin bonding portion bonded to the arc portion and a second resin bonding portion bonded to each of the two rectangular portions, Each of the first resin adhesive portion and the second resin adhesive portion is formed along an edge of the resin member. Item 4 or 5. A work machine according to item 4 or 5.

[0022] Since the first resin bonded portion and the second resin bonded portion are each formed along the edge of the resin member, it is possible to effectively prevent liquid and dust from entering the inside of the resin member from the second region.

[0023] [Item 7] a lead wire electrically connected to the electronic component and a part of which is covered with the resin member; the first region has an end that is not adjacent to the third region; The lead wire protrudes from the resin member at the end portion. The working machine according to any one of items 1 to 6.

[0024] The lead wire is partially covered with the resin member together with the first region, and protrudes from the resin member at the end of the first region that is not in contact with the third region. Therefore, the lead wire can be drawn out from the first region while preventing liquid and dust from entering the resin member. [Brief description of the drawings]

[0025] [Figure 1]FIG. 1 is a perspective view showing the appearance of a backpack-type blower according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing an operating section of the backpack type blower according to the first embodiment. [Diagram 3] 3 is a plan view showing a first area, a second area, and a third area on a first surface of a substrate in an operation unit according to the first embodiment. FIG. [Figure 4] 4 is a plan view showing a first area, a second area, and a third area on a second surface of a substrate in the operation unit according to the first embodiment. FIG. [Diagram 5] 2 is a plan view showing a first surface of a substrate on which a main power switch and a display unit are mounted in a first region according to the first embodiment. FIG. [Figure 6] 4 is a plan view showing a second surface of a substrate having lead wires connected to a first region according to the first embodiment. FIG. [Figure 7] 1 is a perspective view showing a substrate having a main power switch, a display unit, and lead wires connected to a first region according to a first embodiment. FIG. [Figure 8] 2 is a plan view showing a first surface of a substrate in which a first region is covered with a resin member according to the first embodiment. FIG. [Figure 9] 4 is a plan view showing a second surface of the substrate in which a first region is covered with a resin member according to the first embodiment. FIG. [Figure 10] 1 is a perspective view showing a substrate in which a first region is covered with a resin member according to a first embodiment. FIG. [Figure 11] 1 is a perspective view showing a substrate in which a first region is covered with a resin member and a screw inserted into a screw hole of the substrate according to a first embodiment. FIG. [Figure 12] 13 is a plan view showing a first surface of a substrate on which a main power switch and a display unit are mounted in a first region according to a second embodiment. FIG. [Figure 13] FIG. 11 is a plan view showing a first surface of a substrate in which a first region is covered with a resin member and a resin member is bonded to a third region according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] (First embodiment) Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. <1-1. Overall composition> First, the overall configuration of a work machine according to this embodiment will be described with reference to Fig. 1. In this embodiment, a backpack type blower (hereinafter, referred to as a blower) 2 will be described as an example of the work machine.

[0027] The blower 2 includes a blower body 6, a backpack 4, a pipe 8, and a battery pack 90. A shoulder pad 4a and a belt 4b are attached to the carrier 4. The shoulder pad 4a is placed on the shoulder of the user. The belt 4b is attached to the shoulder pad 4a and configured so that the length can be adjusted to suit the user.

[0028] The blower body 6 is fixed to the backpack 4 via a spring for absorbing vibration. The blower body 6 contains two fans (not shown) and two motors for driving the two fans. The two fans blow air in the same direction.

[0029] The battery pack 90 is fixed to the backpack 4 below the blower body 6. A controller (not shown) is also fixed to the backpack 4. The battery pack 90 supplies power to the controller, two motors, an operation unit 30 (described later), and the like. The controller controls the driving of the two motors housed in the blower body 6 based on signals from the operation unit 30 and various switches.

[0030] In addition, the blower body 6 is provided with a pipe attachment part 7. The pipe attachment part 7 is provided so as to be located on the right side of the user when the user carries the carrier 4 on his / her back. A pipe 8 is attached to the pipe attachment part 7. The two fans housed in the blower body 6 take in outside air and expel the taken-in outside air from the pipe attachment part 7 in the same direction.

[0031] The pipe 8 includes a first pipe 8a, a second pipe 8b, a third pipe 8c, a fourth pipe 8d, and a fifth pipe 8e. The first pipe 8a is formed in an L-shape and is detachably attached to the pipe attachment portion 7. The second pipe 8b is formed in a bellows shape and is connected to the first pipe 8a. The third pipe 8c is formed in a straight line and is connected to the second pipe 8b. Either the fourth pipe 8d or the fifth pipe 8e is connected to the third pipe 8c. The fourth pipe 8d is formed in a straight line. The fifth pipe 8e is formed in a straight line and has a discharge port 9 formed with a small diameter at its tip. The fifth pipe 8e can also be connected to the tip of the fourth pipe 8d.

[0032] A handle 20 to be held by a user is attached to the third pipe 8c. The handle 20 is provided with various switches to be operated by a user holding the handle 20, a lock button 26, and an operation unit 30.

[0033] The various switches include a trigger switch 22 and a dial switch 24. The trigger switch 22 is a switch for adjusting the amount of air discharged from the blower 2. The dial switch 24 is a switch for setting the maximum amount of air discharged that can be adjusted by operating the trigger switch 22. The lock button 26 is a button for holding the trigger switch 22 in a position where the amount of pulling of the trigger switch 22 is maximum. By pressing the lock button 26, the trigger switch 22 is fixed in the position where the amount of pulling is maximum. The operation unit 30 is provided with a main power switch 41 and a display unit 42, which will be described later. The main power switch 41 is a switch for starting the blower 2. The display unit 42 notifies the starting state of the blower 2 by the light emission state of an LED 42a, which will be described later. The trigger switch 22, the dial switch 24, the lock button 26, the main power switch 41, and the display unit 42 are connected to the controller via a cable 32.

[0034] <1-2. Operation section configuration> Next, the details of the configuration of the operation unit 30 will be described with reference to Fig. 2 to Fig. 11. As shown in Fig. 2, the operation unit 30 has a substantially rectangular parallelepiped shape. In this embodiment, the longitudinal direction of the operation unit 30 is referred to as the front-rear direction, the lateral direction is referred to as the left-right direction, and the height direction is referred to as the up-down direction.

[0035] The operation unit 30 includes a cover 35 and a main body unit 40 . The cover 35 is made of resin and includes an upper surface portion 38, a wall portion 37, a flange portion 33, and two holding portions 36. The upper surface portion 38 is configured to be substantially rectangular. The upper surface portion 38 includes an operation piece 31 and a window 34. The operation piece 31 is provided on the front side of the upper surface portion 38. The operation piece 31 includes a circular member and a rectangular member. A first end of the rectangular member is connected to the upper surface portion 38, and a second end opposite to the first end is connected to the circular member. A gap is formed between the upper surface portion 38 and a portion of the outer periphery of the operation piece 31 excluding the first end. That is, the operation piece 31 is configured to be displaceable in the up-down direction on the upper surface portion 38 with the first end as a center. The window 34 is a square hole provided on the rear side of the upper surface portion 38.

[0036] The wall portion 37 surrounds the periphery of the upper surface portion 38 and protrudes upward beyond the upper surface portion 38. The flange portion 33 protrudes in the front-rear and left-right directions from the lower end of the wall portion 37. The two holding portions 36 protrude downward from the lower surface of the flange portion 33. The two holding portions 36 include a right holding portion and a left holding portion. The right holding portion extends in the front-rear direction along the right end portion of the flange portion 33. The front and rear ends of the right holding portion are curved toward the left side. The left holding portion extends in the front-rear direction along the left end portion of the flange portion 33. The front and rear ends of the left holding portion are curved toward the right side.

[0037] 10, the main body 40 has a generally rectangular parallelepiped shape, is disposed below the flange 33, and is held by two holding parts 36. That is, the right end of the main body 40 is held by the right holding part, and the left end of the main body 40 is held by the left holding part.

[0038] The main body 40 includes a substrate 70 , a main power switch 41 , a display unit 42 , and a resin member 60 . The substrate 70 is a printed wiring board. As shown in Figures 3 and 4, the substrate 70 has a cross shape including a rectangular portion, a right square portion, and a left square portion. The rectangular portion, the right square portion, and the left square portion have a rectangular shape that is long in the front-to-rear direction. The right square portion is connected to the right end of the rectangular portion, and the left square portion is connected to the left end of the rectangular portion. The substrate 70 also has a first surface 71 and a second surface 72.

[0039] The first surface 71 and the second surface 72 have a first region A1, a second region A2, and a third region A3. The first region A1 corresponds to the region surrounded by the dashed line in Figs. 3 and 4, and corresponds to the rectangular portion of the substrate 70. The second region A2 corresponds to the region surrounded by the chain line in Figs. 3 and 4, and corresponds to the right and left square portions of the substrate 70. That is, the second region A2 includes two regions on the right and left sides of the first region A1. The third region A3 is located at the boundary between the first region A1 and the second region A2. That is, the third region A3 includes two regions on the right and left sides of the first region A1.

[0040] The first area A1 corresponds to an area where the main power switch 41 and the display unit 42 are mounted and covered by the resin member 60. The main power switch 41 and the display unit 42 correspond to the electronic components of the present disclosure. As shown in FIG. 4, a first adhesive portion 76 is provided on the rear side of the second surface 72 of the first area A1. The first adhesive portion 76 has an annular shape. The resist has been peeled off from the first adhesive portion 76, and the first adhesive portion 76 is not covered with the resist.

[0041] The second area A2 corresponds to an area on which no components are mounted on the substrate 70 and which is not covered by the resin member 60. Each of the left and right areas included in the second area A2 is provided with a screw hole 73. The screw hole 73 is a circular hole that penetrates the substrate 70. The two screw holes 73 are disposed at the same position in the front-to-rear direction.

[0042] A slit 74 penetrating the substrate 70 is provided in each of the left and right regions included in the third region A3. Each of the slits 74 has a semicircular arc shape centered on the screw hole 73. The semicircular arc is an arc whose arc length corresponds to half the circumference. That is, the slit 74 provided in the right region of the third region A3 is formed so that the arc is on the left side and the string is on the right side. The slit 74 provided in the left region of the third region A3 is formed so that the arc is on the right side and the string is on the left side. The two slits 74 are arranged at the same position in the front-to-rear direction.

[0043] 3, two second adhesive portions 75 are provided on the first surface 71 of each of the left and right regions included in the third region A3. Each of the second adhesive portions 75 has a rectangular shape with approximately the same width as the slit 74. On the first surface 71 of the third region A3, for each slit 74, a second adhesive portion 75 extending rearward from the rear end of the slit 74 and a second adhesive portion 75 extending forward from the front end of the slit 74 are provided.

[0044] 4, the second surface 72 of each of the left and right regions included in the third region A3 is provided with, for each slit 74, a second adhesive portion 75 extending rearward from the rear end of the slit 74 and a second adhesive portion 75 extending forward from the front end of the slit 74. The positions of the four second adhesive portions 75 provided on the first surface 71 correspond to the positions of the four second adhesive portions 75 provided on the second surface 72.

[0045] The second adhesive portion 75, like the first adhesive portion 76, has had the resist removed and is not covered with resist. Note that the portion of the first surface 71 other than the second adhesive portion 75 is covered with resist. Also, the portion of the second surface 72 other than the first adhesive portion 76 and the second adhesive portion 75 is covered with resist.

[0046] 5 and 7, a main power switch 41 and a display unit 42 are mounted on a first surface 71 of the first area A1. The main power switch 41 is disposed approximately in the center of the first area A1. More specifically, it is disposed between two slits 74. The display unit 42 is disposed on the rear side of the first area A1.

[0047] The main power switch 41 is a tactile switch, and includes a cylindrical push button 41a and a rectangular parallelepiped base 41b. The push button 41a and the base 41b are made of a resin material such as a liquid crystal polymer. The main power switch 41 is not limited to a tactile switch, and may be any switch that can be mounted on the board 70, such as a membrane switch, a rotary switch, or a DIP switch.

[0048] The push button 41a is attached to the upper surface of the base portion 41b so as to be displaceable in the up and down direction. When the main body portion 40 is attached to the cover 35, the push button 41a is disposed directly below the circular member of the operation piece 31. When the user presses the circular member, the circular member and the push button 41a are displaced downward, and when the user releases the circular member, the circular member and the push button 41a are displaced upward and return to their original positions.

[0049] The display unit 42 includes an LED 42a and a lens 42b. The lens 42b is configured in a rectangular shape with an opening on the bottom. The lens 42b is a transparent lens that transmits light emitted from the LED 42a. The "transparent lens" here refers to a lens that has optical transparency that transmits light regardless of the presence or absence of a color of the lens, and includes not only a colorless transparent lens but also a lens that transmits colored light. The lens 42b houses the LED 42a in its internal space and surrounds the LED 42a.

[0050] As shown in FIG. 6, five lead wires 50 are connected to the second surface 72 of the first area A1. The five lead wires 50 include a lead wire for transmitting a signal from the main power switch 41 and a lead wire for supplying power to the LED 42a. Each of the lead wires 50 includes a coating portion 51 and a core wire portion 52. The core wire portion 52 is a metal core wire that is exposed after the coating of the lead wire is removed, and is soldered to the second surface 72. The core wire portion 52 is connected to the terminals of the main power switch 41 and the LED 42a via a through hole provided on the second surface 72 and is provided with copper foil, solder, and copper plating. In addition, on the second surface 72 of the first area A1, the first adhesive portion 76 is provided at a position corresponding to the display unit 42.

[0051] The substrate 70 to which the main power switch 41, the display unit 42, and the lead wires 50 are connected is placed in a mold and held therein. At this time, the second area A2 of the substrate 70 is sandwiched, and the inner circular portion of the first adhesive portion 76 is supported from below, thereby holding the substrate 70 in the mold. Then, resin is injected into the mold, and the injected resin is thermally cured to form the integrally molded resin member 60.

[0052] 8 and 9, the second area A2 and the inner circular portion of the first adhesive portion 76 are not covered with the resin member 60. The resin member 60 covers the first area A1, the main power switch 41, the display unit 42, and a part of the lead wires 50.

[0053] 8 and 9, the resin member 60 includes a first covering portion 61, a second covering portion 62, a third covering portion 63, a fourth covering portion 64, and a fifth covering portion 65. The resin member 60 is made of a resin material such as polyamide.

[0054] The first covering portion 61 covers the first surface 71, the portion of the first area A1 where the main power switch 41 and the display unit 42 are not mounted, and the four second adhesive portions 75. The second covering part 62 covers the periphery of the main power switch 41. The lower end of the second covering part 62 is connected to the first covering part 61. As shown in Fig. 10, the second covering part 62 covers the side surface and the edge of the upper surface of the base part 41b, but does not cover the push button 41a.

[0055] The third covering portion 63 covers the side surfaces and the edges of the upper surface of the lens 42b, but does not cover the central portion of the upper surface of the lens 42b. The lower end of the third covering portion 63 is connected to the first covering portion 61. When the main body portion 40 is attached to the cover 35, the central portion of the upper surface of the lens 42b is positioned directly below the window 34. Therefore, the light emitted from the LED 42a propagates from the central portion of the upper surface of the lens 42b.

[0056] The fifth covering portion 65 covers the first area A1 except for the inside of the first adhesive portion 76 and the four second adhesive portions 75 on the second surface 72. The first adhesive portion 76 is covered by the fifth covering portion 65. At the front end of the first area A1, the front end of the first covering portion 61 is connected to the front end of the fifth covering portion 65. The lead wire 50 protrudes forward from the front end of the fifth covering portion 65. At the rear end of the first area A1, the rear end of the first covering portion 61 is connected to the rear end of the fifth covering portion 65.

[0057] Furthermore, at the right end of the first region A1, the right end of the first covered portion 61 is connected to the right end of the fifth covered portion 65. Also, at the left end of the first region A1, the left end of the first covered portion 61 is connected to the left end of the fifth covered portion 65.

[0058] Moreover, the fourth covering portion 64 passes through the two slits 74 in the vertical direction, and connects between the first covering portion 61 and the second covering portion 62 and the fifth covering portion 65. Therefore, the end portion of the first region A1 is completely covered by the resin member 60 and is not exposed.

[0059] Except for the locations of the first adhesive portion 76 and the second adhesive portion 75, the resin member 60 is connected, and the boundary between the portion covered by the resin member 60 and the substrate 70 is not exposed. At the locations of the first adhesive portion 76 and the second adhesive portion 75, the resin member 60 is not connected to other locations of the resin member 60, and therefore the boundary between the portion covered by the resin member 60 and the substrate 70 is exposed.

[0060] When the resin member 60 shrinks due to thermal curing, a gap may occur between the resin member 60 and the substrate 70. When a gap occurs between the resin member 60 and the substrate 70 at the first adhesive portion 76 and the second adhesive portion 75, the gap is exposed and becomes an inlet for liquid or dust. Furthermore, the resin material constituting the main power switch 41 is different from the resin material of the resin member 60 and has a different thermal contraction rate. Therefore, when the resin member 60 is thermally cured, a gap may also occur between the resin member 60 and the main power switch 41, and liquid or dust that has entered through the inlet may enter the inside of the main power switch 41. If liquid or dust enters the inside of the main power switch 41, the main power switch 41 may malfunction, and the blower 2 may not be able to start.

[0061] In this embodiment, the resin member 60 is adhered to the first adhesive portion 76 and the second adhesive portion 75 without a resist. Therefore, the degree of adhesion between the resin member 60 and the first adhesive portion 76 and the second adhesive portion 75 is improved, and gaps are less likely to occur between the resin member 60 and the substrate 70.

[0062] In this embodiment, a slit 74 is provided at the boundary between the first area A1 and the second area A2, and the resin member 60 penetrates through the slit 74. That is, by providing the slit 74, the exposure of the boundary between the portion covered by the resin member 60 and the substrate 70 is reduced. If the slit 74 is not provided, the first covering portion 61 and the second covering portion 62 are not connected to the fifth covering portion 65 at the slit 74. Therefore, the boundary between the portion covered by the resin member 60 and the substrate 70 is exposed at the slit 74. In addition, the slit 74 may be an inlet for liquid or dust. In this embodiment, by providing the slit 74, the exposure of the boundary between the portion covered by the resin member 60 and the substrate 70 is reduced, and the waterproofness and dustproofness of the main body 40 are improved.

[0063] The operation unit 30 is configured by attaching a main body 40 to a cover 35. As shown in Fig. 11, the main body 40 is attached to the cover 35 by tapping screws 80 inserted into the two screw holes 73, respectively.

[0064] <1-3.Effects> According to the first embodiment described above, the following effects can be obtained. (1) In the substrate 70, a slit 74 is provided at the boundary between a first region A1 on which the main power switch 41 and the display unit 42 are mounted, and a second region A2 on which no electronic components are mounted. Then, the resin member 60 penetrates the slit 74 to cover the first surface 71 and the second surface 72 of the first region A1, as well as a part of the main power switch 41 and a part of the display unit 42. Because the resin member 60 penetrates the slit 74, exposure of the boundary between the portion covered by the resin member 60 and the substrate 70 is suppressed. Therefore, the waterproofness and dustproofness of the operation unit 30 can be improved.

[0065] (2) Since the slits 74 are formed in a semicircular arc shape, the second area A2 can be effectively used to provide the screw holes 73. (3) Since the slit 74 is formed in a semicircular arc shape centered on the screw hole 73, when screwing the main body 40 to the cover 35, the resin member 60 does not get in the way, and the screwing operation can be performed smoothly.

[0066] (4) The resin member 60 is adhered to the second adhesive portion 75 provided at the boundary between the first area A1 and the second area A2 without the interposition of a resist. This improves the adhesion between the resin member 60 and the second adhesive portion 75, and further prevents liquid and dust from entering the first area A1.

[0067] (5) A portion of the lead wire 50 is covered with the resin member 60 together with the first region A1, and the front end of the first region A1 that is not in contact with the third region A3 protrudes from the resin member 60. Therefore, the lead wire 50 can be drawn out from the first region A1 while preventing liquid and dust from entering the first region A1.

[0068] Second embodiment <2-1. Differences from the first embodiment> The second embodiment has the same basic configuration as the first embodiment, so the description of the common configuration will be omitted and the description will focus on the differences. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description will be referred to.

[0069] In the above-described first embodiment, the third region A3 of the substrate 70 is provided with the slit 74. In contrast, the second embodiment is different from the first embodiment in that the third region A3 of the substrate 70A is not provided with the slit 74.

[0070] <2-2. Main body configuration> Next, the third region A3 in the substrate 70A of the main body portion 40A according to the second embodiment will be described with reference to FIGS.

[0071] In this embodiment, the resist has been removed from the entire first surface 71 in the third region A3, and the first surface 71 is not covered with resist. As shown in FIG. 12, on the first surface 71, each of the left and right regions included in the third region A3 includes a circular arc portion 74A and two rectangular portions 75A.

[0072] Each of the arc portions 74A has a semicircular shape centered on the screw hole 73. That is, in the second embodiment, the arc portions 74A are provided on the first surface 71 at the positions of the slits 74 in the first embodiment. The arc portions 74A have two ends 74Aa.

[0073] The two rectangular portions 75A have a rectangular shape extending from the two ends 74Aa to the ends of the substrate 70A. The longitudinal direction of each of the rectangular portions 75A coincides with the longitudinal direction of the substrate 70A. That is, the longitudinal direction of each of the rectangular portions 75A coincides with the front-rear direction, and the short side direction coincides with the left-right direction.

[0074] 13, on the first surface 71, the resin member 60 includes a first covering portion 61A, a second covering portion 62, and a third covering portion 63. The first covering portion 61A includes a first resin bonding portion 64Aa and a second resin bonding portion 64Ab, and covers a portion of the first area A1 where the main power switch 41 and the display unit 42 are not mounted, and the third area A3.

[0075] On the first surface 71, the first resin bonding portion 64Aa is bonded to each of the arc portions 74A of the third region A3. Also, on the first surface 71, the second resin bonding portion 64Ab is bonded to each of the square portions 75A of the third region A3. That is, the first covering portion 61A is configured to have a shape in which the first resin bonding portion 64Aa is added to the first covering portion 61 of the first embodiment.

[0076] The first resin bonding portion 64Aa and the second resin bonding portion 64Ab are formed along the edge of the resin member 60. More specifically, the first resin bonding portion 64Aa and the second resin bonding portion 64Ab are formed along the boundary between the portion covered by the resin member 60A and the substrate 70A. Therefore, the resin member 60A has improved adhesion to the substrate 70 at the boundary with the substrate 70A.

[0077] On the other hand, in the first region A1, the second region A2, and the third region A3 on the second surface 72, the entire resist may be removed or the entire resist may be applied. Alternatively, in the first region A1, the second region A2, and the third region A3 on the second surface 72, a portion of the resist may be removed. For example, in the second surface 72, the resist in the third region A3 may be removed, similar to the first surface 71.

[0078] The resin member 60 includes a fifth covering portion 65A (not shown). The fifth covering portion 65A covers the first region A1 and the third region A3 on the second surface 72, and is connected to the first covering portion 61A. That is, the fifth covering portion 65A is configured in a shape obtained by adding a semicircular arc portion configured in the same shape as the first resin bonding portion 64Aa to the fifth covering portion 65 of the first embodiment.

[0079] <2-3.Effects> According to the second embodiment described above, in addition to the effects (2), (3), and (5) of the first embodiment, the following effect is achieved.

[0080] (6) The resist is removed from the entire first surface 71 of the third region A3. The resin member 60A includes a first resin bonding portion 64Aa and a second resin bonding portion 64Ab bonded to the third region A3. This improves the degree of adhesion between the resin member 60A and the substrate 70A at the end of the resin member 60A adjacent to the second region A2 of the first surface 71, thereby preventing liquid and dust from entering the main power switch 41 and the display unit 42. This improves the waterproof and dustproof properties of the main body 40A.

[0081] (Other embodiments) Although the embodiments for carrying out the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be carried out in various modified forms.

[0082] (a) In the above embodiment, the electronic components mounted on the substrate 70 are the main power switch 41 and the display unit 42, but the electronic components are not limited to this. For example, the electronic component mounted on the substrate 70 may be either the main power switch 41 or the display unit 42, or may be a switch other than the main power switch 41.

[0083] (b) In the above embodiment, the substrate 70 has a cross shape, but the shape of the substrate 70 is not particularly limited. (c) In the above embodiment, the shape of the slit 74 is a semicircular arc, but the shape of the slit 74 is not limited to this. For example, if the screw hole 73 is not provided in the second region A2, the shape of the slit 74 may be a straight line.

[0084] (d) The working machine is not limited to the blower 2, and may be any working machine that operates on DC power from a battery and includes a circuit board and electronic components. For example, the working machine may be an electric power tool, a gardening tool, a laser marking tool, a light, etc. The electric power tool and the gardening tool are tools that drive a tip tool by the driving force of a motor. The electric power tool is, for example, a chain saw, an impact driver, a circular saw, etc. The gardening tool is, for example, a grass cutter, a hedge trimmer, etc. The electric power tool and the gardening tool may also be tools that include an engine that generates a driving force for driving the tip tool, and a starter motor that generates a rotational force by DC power from a battery and imparts an initial rotation to the crankshaft of the engine. The present disclosure can be applied to working machines that are used particularly outdoors to obtain great benefits.

[0085] (e) Multiple functions possessed by one component in the above embodiments may be realized by multiple components, or one function possessed by one component may be realized by multiple components. Also, multiple functions possessed by multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. [Explanation of symbols]

[0086] 2...blower, 20...handle, 22...trigger switch, 30...operation section, 31...operation piece, 34...window, 35...cover, 36...holding section, 37...wall section, 38...upper surface section, 40...main body section, 41...main power switch, 41a...push button, 41b...base section, 42...display section, 42a...LED, 42b...lens, 50...lead wire, 51...coating section, 52...core wire section, 60 ...resin member, 61...first coated portion, 62...second coated portion, 63...third coated portion, 64...fourth coated portion, 65...fifth coated portion, 70...substrate, 71...first surface, 72...second surface, 73...screw hole, 74...slit, 75...second adhesive portion, 76...first adhesive portion, 80...tapping screw, 90...battery pack, A1...first region, A2...second region, A3...third region.

Claims

1. A substrate having a first region, a second region, and a third region located at a boundary between the first region and the second region, each of the first region, the second region, and the third region having a first surface and a second surface; At least one electronic component mounted in the first region; At least one slit having a semicircular arc shape provided in the third region and having a center located in the second region; a resin member that penetrates the at least one slit and is integrally molded so as to cover a part of the at least one electronic component and the first surface and the second surface of the first region, the second region extends entirely outside the resin member and is not covered by the resin member; Work machine.

2. at least one screw hole formed in the second region; the center is one of the at least one screw hole; The work machine according to claim 1.

3. At least one adhesive portion is provided in the third region; the resin member is adhered to the at least one adhesive portion without a resist therebetween; 3. A work machine according to claim 1 or 2.

4. a lead wire electrically connected to the electronic component and a part of which is covered with the resin member; the first region has an end that is not adjacent to the third region; The lead wire protrudes from the resin member at the end portion. A work machine according to any one of claims 1 to 3.

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