Work machine

Abstract

To improve convenience of a work machine.SOLUTION: A cleaner 1A includes: a case 2 constituted by a main body part 10 ad a lid part 50 to be detachable from the main body part 10 so as to store at least a motor and a fan; and holding mechanisms 60 for holding the lid part 50 with respect to the main body part 10. The lid part 50 has a mounting state where the lid part is assembled with the main body part 10 so as to define a storage space for storing a dust collection bag with the main body part 10, and a holding state where the part is not assembled with the main body part 10 so as to be held by the holding mechanisms 60.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] A cleaner (vacuum cleaner) is known as an example of a work machine. For example, Patent Document 1 discloses a cleaner equipped with a detachable front cover attached to a housing. The front cover equipped on the cleaner described in Patent Document 1 opens and closes a dust collection chamber in which a dust bag is stored. Specifically, by removing the front cover from the housing, the dust bag can be put in and taken out of the dust collection chamber inside the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-70853 Summary of the Invention [Problem to be solved by the invention]

[0004] In the cleaner disclosed in Patent Document 1, there is a risk that the front cover may be lost when removed from the housing, and there is room for improvement in terms of convenience. [Means for solving the problem]

[0005] A work machine according to one embodiment includes a motor, a fan that rotates by receiving driving force from the motor, a case that includes a main body and a detachable lid that houses at least the motor and the fan, and a holding mechanism that holds the lid to the main body. The lid has an attached state in which it is attached to the main body and defines a storage space between it and the main body for storing a dust bag, and a held state in which it is not attached to the main body and is held by the holding mechanism. [Effects of the Invention]

[0006] According to the present invention, the convenience of the work machine is further improved. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view showing the appearance of the cleaner. [Figure 2] FIG. 2 is a cross-sectional view showing the structure of the cleaner. [Figure 3] FIG. 2 is a side view showing the appearance of the cleaner when the cover is not attached to the main body. [Figure 4] FIG. 2 is a perspective view showing the appearance of the lid portion. [Figure 5] 10 is a side view showing the cover with the dust bag attached to the holder. FIG. [Figure 6] 10A and 10B are cross-sectional views showing a process of assembling the cover to the main body. [Figure 7] 10 is another cross-sectional view showing the step of assembling the cover to the main body. FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] 10A and 10B are explanatory views showing a process in which the ribs of the dust case are inserted into the grooves of the lid portion. [Figure 11] FIG. 10 is a partially enlarged view showing a modified example of the holding mechanism. [Figure 12A] 10A and 10B are explanatory views showing a process in which an engaging protrusion is fitted into an engaging recess. [Figure 12B] 10 is another explanatory view showing the step of fitting the engaging protrusion into the engaging recess. FIG. [Figure 13] FIG. 12C is an end view showing a cross section taken along line BB in FIG. 12B. [Figure 14] FIG. 10 is a perspective view showing another modified example of the holding mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0008] An example of an embodiment of the present invention will be described below with reference to the drawings. In all drawings used to describe the embodiment, the same reference numerals are used for identical or substantially identical configurations and elements. Furthermore, as a general rule, once a configuration or element has been described, it will not be described again.

[0009] The working machine according to the present embodiment is a cleaner that is suitable for use in dust collection work, and more particularly, the working machine according to the present embodiment is a portable cleaner.

[0010] <Cleaner Overview> Fig. 1 is a perspective view showing the appearance of a cleaner 1A according to this embodiment. Fig. 2 is a cross-sectional view showing the structure of the cleaner 1A according to this embodiment. The cleaner 1A has a case 2 that forms an outer shell, and the case 2 houses a motor 3, a fan 4, etc.

[0011] Fan 4 is a centrifugal fan that rotates by receiving the driving force of motor 3. When fan 4 rotates, air is drawn into case 2. If the air drawn into case 2 contains dust, the dust is separated from the air inside case 2. The dust separated from the air is stored inside case 2, and the air from which the dust has been separated is exhausted to the outside of case 2.

[0012] <Case> The case 2 is made up of a main body 10 and a lid 50. The main body 10 is further made up of a motor case 20 and a dust case 30. As will be described in detail later, the lid 50 is detachable from the main body 10. More specifically, the lid 50 is detachable from the dust case 30.

[0013] <Motor case> The motor case 20 is formed by two casing members that are fixed to each other in an abutting state.

[0014] The motor 3 and the fan 4 are housed in a motor case 20. An inlet 21 to which a filter member 5 is attached is provided on the front surface of the motor case 20, and the fan 4 is disposed inside (behind) the inlet 21.

[0015] A part of the motor case 20 forms a grip 23 that is held by an operator, and a controller 6 that controls the entire cleaner 1A including the motor 3 is housed inside the grip 23.

[0016] A battery mounting section 24 is provided at the rear lower portion of the motor case 20. A battery pack 7 is detachably attached to the battery mounting section 24. The battery pack 7 is a rechargeable secondary battery. More specifically, the battery pack 7 in this embodiment is a lithium ion battery.

[0017] When the battery pack 7 is attached to the battery attachment section 24, the connection terminals of each battery pack come into contact with each other, establishing electrical continuity. When a predetermined operation is performed with a charged battery pack 7 attached to the battery attachment section 24, power is supplied from the battery pack 7 to the motor 3, causing the motor 3 to operate. The fan 4 then receives the driving force of the motor 3 and rotates. As described above, when the fan 4 rotates, air is sucked into the case 2.

[0018] <Dust case> The dust case 30 has a substantially cylindrical shape and is detachable from the motor case 20. A cylindrical nozzle portion 31 is provided on one end of the dust case 30.

[0019] For ease of explanation, the axial direction of the cylindrical nozzle portion 31 is defined as the front-rear direction. Furthermore, the side on which the cylindrical nozzle portion 31 is provided is defined as the front side or tip side. According to this definition, the cylindrical nozzle portion 31 is provided on the tip side of the dust case 30.

[0020] Although not shown in the figure, a pair of engagement protrusions are provided on the rear end side of the dust case 30. Each engagement protrusion protrudes radially inward from the inner circumferential surface of the dust case 30 and extends in an arc along the inner circumferential surface of the dust case 30.

[0021] The engagement protrusions provided on the dust case 30 are fitted into the engagement grooves provided on the motor case 20 , and the dust case 30 is rotated relative to the motor case 20 , whereby the dust case 30 is attached to the motor case 20 .

[0022] The dust case 30 attached to the motor case 20 is located in front of the inlet 21 of the motor case 20 and houses the filter member 5. As a result, the motor case 20 and the dust case 30 are integrated to form the main body 10, and the motor case 20 and the dust case 30 are in communication with each other via the inlet 21.

[0023] In this embodiment, the floor nozzle 33 is connected to the cylindrical nozzle portion 31 via the extension pipe 32. Therefore, when the fan 4 rotates, air containing dust is sucked into the floor nozzle 33 through the suction port of the floor nozzle 33. The dust-containing air then passes through the extension pipe 32 and the cylindrical nozzle portion 31 and flows into the case 2.

[0024] However, a dust collection bag 8 that communicates with the cylindrical nozzle portion 31 is housed within the case 2. More specifically, the dust collection bag 8 that communicates with the cylindrical nozzle portion 31 is housed within an accommodation space 9 of the case 2. As will be described in detail later, the accommodation space 9 is defined between the dust case 30, which is part of the main body portion 10, and the lid portion 50 by the lid portion 50 that is attached to the dust case 30.

[0025] All of the air that flows into the case 2 as the fan 4 rotates is introduced into the dust collection bag 8. The dust collection bag 8 is formed into a bag shape from a breathable material such as nonwoven fabric or filter cloth, and captures dust contained in the introduced air.

[0026] From another perspective, dust is stored in dust collection bag 8, and the air from which the dust has been separated flows out from dust collection bag 8. The air that flows out from dust collection bag 8 passes through filter member 5, flows into motor case 20 from inlet 21, and is then exhausted to the outside of case 2 from exhaust port 25. Filter member 5 captures fine particles that have passed through dust collection bag 8, further purifying the air. For example, a HEPA filter is used as filter member 5.

[0027] It should be noted that various attachments such as a nozzle equipped with a brush and a flexible hose can also be connected to the cylindrical nozzle portion 31.

[0028] <Lid> Fig. 3 is a side view showing the appearance of the cleaner 1A when the lid part 50 is not attached to the main body part 10 (dust case 30). From another perspective, Fig. 3 is a side view showing the appearance of the cleaner 1A when the lid part 50 is detached from the main body part 10 (dust case 30).

[0029] 1 and 2, when the lid portion 50 is assembled to the dust case 30, a storage space 9 is defined in which the dust collection bag 8 is housed. More specifically, when the lid portion 50 is assembled to the dust case 30, the opening 34 (FIG. 3) of the dust case 30 is closed by the lid portion 50, and the storage space 9 (FIG. 2) is defined.

[0030] On the other hand, as shown in Fig. 3, when the lid part 50 is not attached to the dust case 30, the opening 34 of the dust case 30 is not closed, and therefore the storage space 9 is not defined. The lid part 50 shown in Fig. 3 is held to the main body part 10 by a holding mechanism 60, which will be described later.

[0031] <Lid body> Figure 4 is a perspective view showing the appearance of the lid part 50. The lid part 50 has a lid part main body 51. The lid part main body 51 has a shape and dimensions that allow it to be substantially flush with the dust case 30 and close the opening 34 (Figure 3) of the dust case 30 when the lid part 50 is assembled to the dust case 30.

[0032] A protrusion 51a is provided on one longitudinal end of the lid body 51, and a latch 51b is provided on the other longitudinal end. For ease of explanation, the side on which the protrusion 51a is provided is defined as the front side or tip side of the lid body 51, and the side on which the latch 51b is provided is defined as the rear side or rear end side of the lid body 51.

[0033] ≪Holding part≫ A holding portion 52 to which the dust collection bag 8 can be detachably attached is provided on the tip side of the lid main body 51. The holding portion 52 is shaped like a rectangular plate overall, and is screwed to the inside of the lid main body 51. Furthermore, a connecting portion 53 is provided approximately in the center of the holding portion 52, which is coaxial with the cylindrical nozzle portion 31 and communicates with the cylindrical nozzle portion 31 when the lid portion 50 is assembled to the dust case 30.

[0034] 5 is a side view showing the lid 50 with the dust bag 8 attached to the holder 52. The dust bag 8 is attached to the rear side of the holder 52 and is disposed below the lid main body 51. From another perspective, the dust bag 8 is held by the holder 52 and is integrated with the lid 50. At this time, the inlet of the dust bag 8 communicates with the connection part 53.

[0035] <Regulation Department> A restricting portion 54 is provided at the bottom of the holding portion 52. The restricting portion 54 has a rotatable abutting portion 55. When the dust bag 8 is attached to the lid portion 50, the abutting portion 55 is located in the position shown in Fig. 5 (non-restricting position). More specifically, when the dust bag 8 is held by the holding portion 52 and is disposed at a predetermined position relative to the holding portion 52, the abutting portion 55 is located in the position shown in Fig. 5 (non-restricting position).

[0036] For example, when the dust bag 8 is properly attached to the holding portion 52 shown in FIG. 4, the contact portion rotates in the R1 direction and moves from the restricted position shown in FIG. 4 to the non-restricted position shown in FIG. 5.

[0037] On the other hand, when the dust bag 8 is not attached to the lid portion 50, the contact portion 55 is located in the position (restricted position) shown in Fig. 4. More specifically, when the dust bag 8 is not held by the holder 52 or is not placed in a predetermined position with respect to the holder 52, the contact portion 55 is located in the position (restricted position) shown in Fig. 4.

[0038] For example, when the dust bag 8 shown in FIG. 5 is removed from the holding portion 52, the abutment portion 55 rotates in the R2 direction and moves from the non-restricted position shown in FIG. 5 to the restricted position shown in FIG. 4.

[0039] From another perspective, the restricting portion 54 switches between a restricting state in which the contacting portion 55 is located in the restricting position and a non-restricting state in which the contacting portion 55 is located in the non-restricting position. Furthermore, the state of the restricting portion 54 switches depending on whether the dust bag 8 is properly attached to the lid portion 50.

[0040] The restricting portion 54 in the non-restricted state (FIG. 5) allows the lid portion 50 to be assembled to the main body portion 10, while the restricting portion 54 in the non-restricted state (FIG. 4) does not allow the lid portion 50 to be assembled to the main body portion 10.

[0041] 6 and 7 are cross-sectional views showing the process of assembling the cover 50 to the main body 10. However, the restricting portion 54 shown in Fig. 6 is in a non-restricting state, and the restricting portion 54 shown in Fig. 7 is in a restricting state.

[0042] From another perspective, the dust bag 8 is normally attached to the lid portion 50 shown in FIG. 6, but the dust bag 8 is not attached to the lid portion 50 shown in FIG. 7.

[0043] When the lid portion 50 is attached to the main body portion 10, the lid portion 50 is rotated relative to the dust case 30 around the protrusion 51a inserted into the front recess 35 provided on the dust case 30 as a fulcrum.

[0044] At this time, when the restricting portion 54 is in the restricting state, the abutting portion 55 located in the restricting position abuts against the cylindrical nozzle portion 31, preventing the lid portion 50 from being rotated any further (FIG. 7). More specifically, the abutting portion 55 abuts against the lower rear end of the cylindrical nozzle portion 31 before the claw of the latch 51b of the lid portion 50 engages with the rear recess 36 provided in the dust case 30.

[0045] In other words, when the restricting portion 54 is in the restricting state, the lid portion 50 cannot be assembled to the main body portion 10. From another perspective, the lid portion 50 cannot be assembled to the main body portion 10 if the dust bag 8 is not attached or is not attached properly.

[0046] On the other hand, the abutment portion 55 located in the non-restricting position does not abut against the cylindrical nozzle portion 31 even when the lid portion 50 is rotated relative to the dust case 30. In other words, when the restricting portion 54 is in the non-restricting state, the abutment portion 55 is retracted to a position where it does not interfere with the cylindrical nozzle portion 31.

[0047] Therefore, when the restricting portion 54 is in the non-restricting state, the cover portion 50 can be rotated relative to the dust case 30 until the claw of the latch 51b engages with the rear recess 36 provided in the dust case 30.

[0048] That is, when the restricting portion 54 is in the non-restricting state, the protrusion 51a provided on the leading end side of the lid portion 50 can be engaged with the front recess 35 of the dust case 30, and the claw of the latch 51b provided on the rear end side of the lid portion 50 can be engaged with the rear recess 36 of the dust case 30. In other words, only the lid portion 50 to which the dust bag 8 is normally attached can be assembled to the main body portion 10.

[0049] As described above, the protrusion 51a and the latch 51b are engaging portions that engage with the main body portion 10 when the cover portion 50 is assembled to the main body portion 10 to define the storage space 9. In other words, the protrusion 51a and the latch 51b are an example of a first engaging portion.

[0050] <Wearing state / holding state> 1 and 3 again, the lid part 50 has a state where it is assembled to the dust case 30 and defines the storage space 9 (FIG. 1), and a state where it is not assembled to the dust case 30 and is held by the holding mechanism 60 (FIG. 3).

[0051] From another perspective, the lid portion 50 in the state (attached state) shown in Fig. 1 closes the opening 34 of the dust case 30 and defines the storage space 9. On the other hand, the lid portion 50 in the state (held state) shown in Fig. 3 does not close the opening 34 of the dust case 30 and does not define the storage space 9.

[0052] In other words, when the lid portion 50 is in the attached state, the opening 34 provided in the dust case 30 is closed, and the storage space 9 is defined. On the other hand, when the lid portion 50 is in the held state, the opening 34 provided in the dust case 30 is open, and the storage space 9 is not defined. Furthermore, the inside of the dust case 30 can be seen from outside the dust case 30 through the open opening 34. The holding portion 52, which is stored inside the case 2 and cannot be seen in the attached state, can also be seen from outside the dust case 30 in the held state.

[0053] 1 and 3, the position of the lid portion 50 relative to the main body portion 10 in the held state is different from the position of the lid portion 50 relative to the main body portion 10 in the attached state. For example, as shown in FIG. 1, the lid portion 50 in the attached state is disposed so that the entire lid portion 50 overlaps the dust case 30 in the vertical direction. On the other hand, as shown in FIG. 3, the front portion of the lid portion 50 in the held state overlaps the dust case 30 in the vertical direction, but another portion protrudes forward beyond the front end of the dust case 30 and covers the cylindrical nozzle portion 31. The rear end portion of the lid portion 50 in the held state protrudes forward beyond the front end of the cylindrical nozzle portion 31.

[0054] Furthermore, the orientation of the lid portion 50 relative to the main body portion 10 in the attached state is different from the orientation of the lid portion 50 relative to the main body portion 10 in the held state. More specifically, the orientation of the lid portion 50 relative to the main body portion 10 in the attached state is 180 degrees different from the orientation of the lid portion 50 relative to the main body portion 10 in the held state. In other words, the front and back of the lid portion 50 are reversed between the attached state and the held state.

[0055] <Retention mechanism> Fig. 8 is a partially enlarged view showing the holding mechanism 60. Fig. 9 is an end view showing the holding mechanism 60. The end face shown in Fig. 9 is a cross section taken along line AA in Fig. 3.

[0056] The holding mechanism 60 of this embodiment is composed of a pair of ribs 61 provided on the dust case 30 and a pair of grooves 62 provided on the lid portion 50. Each rib 61 is provided inside the opening 34 of the dust case 30 and extends in the axial direction of the cylindrical nozzle portion 31. Each groove 62 is provided on both sides of the holding portion 52 of the lid portion 50 and has a width that allows the rib 61 to be inserted therein.

[0057] From another perspective, protrusions extending along the two opposing long sides of opening 34 are formed near those long sides. Meanwhile, recesses into which ribs 61 can be inserted are formed at the top of both side surfaces of holding portion 52 of lid portion 50.

[0058] When the rib 61 of the dust case 30 is inserted into the groove 62 of the lid portion 50, the two engage with each other. As a result, the lid portion 50 is held relative to the dust case 30. In other words, the lid portion 50 is caught on the dust case 30.

[0059] 10 is an explanatory diagram showing the process of inserting the rib 61 of the dust case 30 into the groove 62 of the lid portion 50. The width of the opening 34 gradually narrows toward the tip of the dust case 30. As a result, the distance between the pair of ribs 61 also narrows as they approach the tip of the dust case 30.

[0060] The retaining portion 52 is inserted into the opening 34 at a position where the distance between the pair of ribs 61 is wider than the width of the retaining portion 52, and the heights of the ribs 61 and the grooves 62 are aligned. Then, the lid portion 50 is moved toward the front end of the dust case 30. When the lid portion 50 is moved to a predetermined position, the ribs 61 on the dust case 30 are inserted into the grooves 62 on the retaining portion 52, and the two engage with each other. As a result, the lid portion 50 is held relative to the dust case 30. The engagement between the ribs 61 and the grooves 62 can be released by moving the lid portion 50 toward the rear end of the dust case 30.

[0061] As described above, the groove 62 provided in the cover portion 50 is an engagement portion that engages with the main body portion 10 when the cover portion 50 is not assembled to the main body portion 10, and is also an engagement portion that is engaged with the main body portion 10 or disengaged from the main body portion 10 as the cover portion 50 moves relative to the main body portion 10 in the axial direction (front-rear direction) of the cylindrical nozzle portion 31. In other words, the groove 62 is an example of a second engagement portion.

[0062] <Summary> As described above, the lid portion 50 shown in Fig. 3 is in a held state in which it is held by the holding mechanism 60. More specifically, the lid portion 50 shown in Fig. 3 is hooked onto the dust case 30. Therefore, when the cleaner 1A shown in Fig. 3 is stood up, the lid portion 50 hangs from the dust case 30. For example, when the cleaner 1A shown in Fig. 3 is leaned against a dedicated stand or against a wall, the lid portion 50 hangs from the dust case 30.

[0063] From another perspective, in this embodiment, the lid part 50 removed from the dust case 30 can be hooked onto the dust case 30. Therefore, there is no risk of losing the lid part 50 removed from the dust case 30, and there is no need to secure a place to store the lid part 50 removed from the dust case 30.

[0064] Furthermore, the position and orientation of the lid portion 50 relative to the main body portion 10 in the held state is significantly different from the position and orientation of the lid portion 50 relative to the main body portion 10 in the attached state. From another perspective, the position and orientation of the lid portion 50 relative to the main body portion 10 when held by the holding mechanism 60 is significantly different from the position and orientation of the lid portion 50 relative to the main body portion 10 when not held by the holding mechanism 60.

[0065] Therefore, in this embodiment, it is possible to know at a glance that the lid portion 50 is in the retained state. Here, when the lid portion 50 is in the retained state, the storage space 9 in which the dust bag 8 is stored is not defined. Furthermore, when the lid portion 50 is in the retained state, the inside of the dust case 30 can be seen. In other words, in this embodiment, it is possible to know at a glance that the dust bag 8 is not attached.

[0066] In addition, since the opening 34 of the dust case 30 is open in the held state, even if the motor 3 is driven and the fan 4 rotates in the held state, the airflow will enter the dust case 30 through the opening 34, which has a relatively large opening area, and will hardly enter through the cylindrical nozzle portion 31, which has an opening area smaller than that of the opening 34. Therefore, even if an operator accidentally drives the motor 3 while the dust case 30 is held, it is possible to prevent dust from entering the dust case 30 through the cylindrical nozzle portion 31.

[0067] Furthermore, the dust bag 8 is not attached to the lid portion 50 shown in Fig. 3. Therefore, the restricting portion 54 of the lid portion 50 shown in Fig. 3 is in the restricted state. That is, in this embodiment, the lid portion 50 can be held to the main body portion 10 by the holding mechanism 60 even when the restricting portion 54 is in the restricted state.

[0068] <First Modified Example of Holding Mechanism> Fig. 11 is a partially enlarged view showing a modified example of the holding mechanism 60. The holding mechanism 70 shown in Fig. 11 is composed of a pair of engaging recesses 71 provided in the dust case 30 and a pair of engaging protrusions 72 provided in the lid portion 50.

[0069] The engagement recesses 71 are provided on both sides in the width direction of the opening 34 of the dust case 30. Each engagement recess 71 is a groove including a vertical groove 71a extending downward from the edge of the opening 34 and a horizontal groove 71b extending from the lower end of the vertical groove 71a toward the tip side of the dust case 30. Each engagement recess 71 further includes a constricted portion 71c located between the vertical groove 71a and the horizontal groove 71b.

[0070] The engaging protrusions 72 are provided on both widthwise sides of the lid body 51 of the lid 50. Each engaging protrusion 72 is a substantially L-shaped projection including a vertical portion 72a extending downward from the edge of the lid body 51 and a horizontal portion 72b extending outward in the widthwise direction from the lower end of the vertical portion 72a.

[0071] When the engaging protrusions 72 are fitted into the engaging recesses 71, they engage with each other. As a result, the lid 50 is held relative to the dust case 30. In other words, the lid 50 is caught on the dust case 30.

[0072] 12A and 12B are explanatory views showing a process of fitting the engaging protrusion 72 into the engaging recess 71. Fig. 13 is an end view showing a cross section taken along line BB in Fig. 12B.

[0073] 11 and 12A, the horizontal portion 72b of the engaging protrusion 72 is inserted into the vertical groove 71a from the upper end thereof. As shown in Fig. 11, the width W1 of the upper end of the vertical groove 71a is greater than the diameter D of the horizontal portion 72b. Therefore, the horizontal portion 72b of the engaging protrusion 72 can be easily inserted into the vertical groove 71a.

[0074] 12B, the lid portion 50 is moved toward the tip of the dust case 30. Then, the horizontal portion 72b of the engaging protrusion 72 passes through the narrowed portion 71c and enters the horizontal groove portion 71b. In other words, the engaging protrusion 72 is fitted into the engaging recess 71.

[0075] 11, the width W2 of the constricted portion 71c is the same as or slightly smaller than the diameter D of the horizontal portion 72b. Therefore, the horizontal portion 72b of the engaging protrusion 72 temporarily widens the constricted portion 71c when passing over the constricted portion 71c. In other words, the horizontal portion 72b of the engaging protrusion 72 elastically deforms the constricted portion 71c when passing over the constricted portion 71c.

[0076] After the horizontal portion 72b of the engaging protrusion 72 has passed, the width W2 of the constricted portion 71c returns to its original width. This prevents the engaging protrusion 72 from coming off the engaging recess 71. From another perspective, the engaging recess 71 and the engaging protrusion 72 engage with each other, and the engaged state is maintained. However, the engagement between the engaging recess 71 and the engaging protrusion 72 can be released by moving the lid 50 toward the rear end of the dust case 30.

[0077] As described above, the engaging protrusion 72 provided on the cover 50 is an engaging portion that engages with the main body 10 when the cover 50 is not assembled to the main body 10, and is also an engaging portion that is engaged with the main body 10 or disengaged from the main body 10 as the cover 50 moves relative to the main body 10 in the axial direction (front-rear direction) of the cylindrical nozzle 31. In other words, the engaging protrusion 72 is another example of a second engaging portion.

[0078] <Second Modification of Retention Mechanism> Figure 14 is a perspective view showing another modified example of the holding mechanism 60. The holding mechanism 80 shown in Figure 14 is composed of a band 81 provided on the lid 50. One end of the band 81 is fixed to one side of the lid main body 51, and the other end of the band 81 is fixed to the other side of the lid main body 51. In other words, the band 81 is generally annular as a whole.

[0079] When the lid portion 50 arranged in front of the dust case 30 is moved rearward and the band 81 is placed over the dust case 30, the band 81 engages with the dust case 30 and the lid portion 50 is held relative to the dust case 30.

[0080] From another perspective, when the dust case 30 positioned behind the lid portion 50 is moved forward and inserted inside the band 81, the band 81 engages with the dust case 30, and the lid portion 50 is held relative to the dust case 30.

[0081] It is apparent that the engagement of the band 81 with the dust case 30 can be released by reversing the above procedure.

[0082] As described above, the band 81 is an engaging portion that engages with the main body portion 10 when the cover portion 50 is not assembled to the main body portion 10, and is also an engaging portion that is engaged with the main body portion 10 or disengaged from the main body portion 10 as the cover portion 50 moves relative to the main body portion 10 in the axial direction (front-rear direction) of the cylindrical nozzle portion 31. In other words, the band 81 is another example of a second engaging portion.

[0083] The present invention is not limited to the above-described embodiment and modifications, and various modifications are possible without departing from the spirit of the present invention. For example, instead of the dust collection bag 8, a filter made of nonwoven fabric or the like and having various shapes such as a cylindrical, bellows, or plate shape may be used to collect dust. [Explanation of symbols]

[0084] 1A...cleaner, 2...case, 3...motor, 4...fan, 5...filter member, 6...controller, 7...battery pack, 8...dust collection bag, 9...accommodation space, 10...main body, 20...motor case, 21...inlet, 23...grip, 24...battery mounting section, 25...exhaust port, 30...dust case, 31...cylindrical nozzle section, 32...extension pipe, 33...floor nozzle, 34...opening , 35...front recess, 36...rear recess, 50...lid portion, 51...lid portion main body, 51a...protrusion, 51b...latch, 52...retaining portion, 53...connecting portion, 54...regulating portion, 55...abutting portion, 60, 70, 80...retaining mechanism, 61...rib, 62...groove, 71...engaging recess, 71a...vertical groove portion, 71b...horizontal groove portion, 71c...constricted portion, 72...engaging protrusion portion, 72a...vertical portion, 72b...horizontal portion, 81...band

Claims

1. A motor; a fan that rotates by receiving the driving force of the motor; a case including a main body and a detachable cover for accommodating at least the motor and the fan; a holding mechanism capable of holding the lid portion relative to the main body portion, The work machine has an attached state in which the lid portion is assembled to the main body portion and defines a storage space between the lid portion and the main body portion to store a dust bag, and a held state in which the lid portion is not assembled to the main body portion and is held by the holding mechanism.

2. The work machine according to claim 1 , wherein a position of the lid portion relative to the main body portion in the held state is different from a position of the lid portion relative to the main body portion in the attached state.

3. When the lid portion is attached to the main body portion, an opening provided in the main body portion is closed by the lid portion to define the storage space, The work machine according to claim 1 , wherein when the cover portion is not attached to the main body portion, the opening is not closed and the storage space is not defined.

4. The work machine according to claim 1 , wherein the inside of the main body is visible when the lid is in the holding state.

5. The work machine according to claim 1 , wherein an orientation of the lid portion relative to the main body portion in the attached state is different from an orientation of the lid portion relative to the main body portion in the held state.

6. The work machine according to claim 5 , wherein an orientation of the lid portion relative to the main body portion in the attached state differs by 180 degrees from an orientation of the lid portion relative to the main body portion in the held state.

7. The work machine according to claim 1 , wherein the cover portion has a first engagement portion that engages with the main body portion in the attached state, and a second engagement portion that engages with the main body portion in the held state.

8. The main body has a cylindrical nozzle that communicates with the dust bag accommodated in the accommodation space, The work machine according to claim 7, wherein the second engagement portion is engaged with the main body portion or disengaged from the main body portion by the lid portion moving relative to the main body portion in the axial direction of the cylindrical nozzle portion.

9. the main body portion has a rib extending in the axial direction of the cylindrical nozzle portion, The work machine according to claim 8 , wherein the second engagement portion is a groove into which the rib can be inserted.

10. The lid portion has a holding portion that holds the dust bag, The work machine according to claim 7 , wherein the second engaging portions are provided on both sides of the holding portion.

11. a restricting portion that switches between a non-restricted state that allows the lid portion to be assembled to the main body portion and a restricted state that does not allow the lid portion to be assembled to the main body portion, The work machine according to claim 1 , wherein the lid portion can be held relative to the main body portion by the holding mechanism even when the restricting portion is in the restricting state.

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