Connection structure between power tools and accessories

Abstract

This invention relates to a connection structure between a power tool and an accessory. The connection structure between an air dust collector (1) and a nozzle (8) includes a locking mechanism (5). The locking mechanism (5) is configured to operate in response to a user's installation operation of the nozzle (8) as the nozzle (8) moves rearward relative to the air dust collector (1), and to lock the nozzle (8) in the installation position in a manner that prevents it from moving forward in response to the nozzle (8) being positioned relative to the air dust collector (1). Accordingly, this invention provides an improvement in the operability of a connection structure between a power tool and an accessory.

Description

Technical Field

[0001] This invention relates to a connection structure between a power tool and an attachment. Background Technology

[0002] A power tool capable of selectively mounting attachments is known. For example, on a blower (air dust collector) capable of ejecting compressed air from a nozzle, a nozzle of appropriate diameter can be changed according to the task. Patent Document 1 discloses a connection structure between an air dust collector and a nozzle. This connection structure has a mounting groove and a protrusion, wherein the mounting groove is provided on the peripheral wall near the nozzle outlet of the air dust collector; the protrusion is provided on the peripheral wall of the nozzle and can engage with the mounting groove. The mounting groove is an L-shaped groove having a portion extending in an axial direction and a portion extending in a circumferential direction. The user can mount the nozzle on the air dust collector by fitting the nozzle into the air dust collector in the axial direction and rotating the nozzle relative to it in the circumferential direction.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 2012-77817 Summary of the Invention

[0006] [The technical problem that the invention aims to solve]

[0007] The aforementioned connection structure allows for relatively simple installation of the nozzle onto the air dust collector. However, from an operability standpoint, there is room for further improvement in this connection structure.

[0008] In view of the above, the object of the present invention is to provide an improved solution for the operability of the connection structure between power tools and accessories.

[0009] [Technical solutions used to solve technical problems]

[0010] According to one aspect of the present invention, a connection structure between a power tool and an accessory is provided. The connection structure includes a locking mechanism. The locking mechanism is configured to operate in response to a user's installation operation of the accessory, as the accessory moves relative to the power tool in a first direction. The locking mechanism is further configured to lock the accessory in the installation position in a manner that prevents it from moving in a second direction opposite to the first direction, in response to the accessory being positioned relative to the power tool in the installation position.

[0011] According to the connection structure of the present technical solution, when the user only moves the attachment relative to the power tool in the first direction to the installation position, the locking mechanism can be operated to lock the attachment so that it cannot move in the second direction. Therefore, compared with the case where the attachment needs to be operated in two directions, the operability can be improved.

[0012] In one technical solution of the present invention, the installation operation may be an operation of linearly moving the attachment toward the power tool in the first direction. In this case, the user can install the attachment on the power tool through the simplest and most easily understandable operation envisioned in the installation of the attachment.

[0013] In one technical solution of the present invention, the locking mechanism may include a fixed member, a movable member, and a biasing member. The fixed member may be fixed to the power tool. The movable member may be configured to be able to move only in the first direction and the second direction along a predetermined axis relative to the fixed member. Relative to the fixed member, the biasing member may bias the movable member in the second direction. The attachment may have a first engaging portion. The fixed member may have a second engaging portion. The second engaging portion may be configured to engage with the first engaging portion in response to the attachment being disposed at the installation position, thereby prohibiting the attachment from moving in the second direction.

[0014] The movable member may be configured to: in response to the installation operation, move in the first direction by the attachment overcoming the biasing force of the biasing member. Further, the movable member may be configured to move in the second direction by the biasing force of the biasing member in response to the engagement of the first engaging portion and the second engaging portion, so as to maintain the engagement of the first engaging portion and the second engaging portion. In this case, by using the movable member that moves in response to the movement of the attachment, a reasonable structure capable of automatically locking the attachment is realized.

[0015] In one technical solution of the present invention, the first engaging portion may be an elastically deformable locking piece. The second engaging portion may be a locking recess into which the locking piece can be locked. The movable member may have a restricting portion. The restricting portion may be configured to restrict the elastic deformation of the locking piece when the attachment is disposed at the installation position. In this case, the restricting portion can reliably prevent the locking of the locking piece to the locking recess from being released.

[0016] In one technical solution of the present invention, the locking mechanism may be configured to restrict the attachment disposed at the installation position from rotating about the axis. In this case, in addition to prohibiting the attachment disposed at the installation position from moving in the second direction, the locking mechanism also restricts the attachment from rotating about the axis, so that the attachment can be locked more reliably.

[0017] In one technical solution of the present invention, the attachment may have a protrusion. The movable member may have a recess configured to restrict the attachment from rotating about the axis by engaging with the protrusion. In this case, the rotation of the attachment can be restricted with a simple structure.

[0018] In one embodiment of the present invention, the locking mechanism can be configured to release the lock on the accessory in response to a user's unlocking operation. In this case, since the accessory can be removed without operating the air purifier, operability is improved.

[0019] In one embodiment of the present invention, the locking release operation can be an operation that rotates the accessory about a predetermined axis. In this case, locking release can be reasonably achieved by operating in a direction different from the installation operation.

[0020] In one embodiment of the present invention, the locking mechanism may have a fixed component, a movable component, and a force-applying component. The fixed component may be fixed to a power tool. The movable component may be configured to move relative to the fixed component along a predetermined axis only in a first direction and a second direction. Relative to the fixed component, the force-applying component may apply force to the movable component in the second direction. The attachment may have a first engaging portion. The fixed component may have a second engaging portion and an opening portion. The second engaging portion may be configured to engage with the first engaging portion in response to the attachment being positioned in the mounting position, thereby preventing movement of the attachment in the second direction. The opening portion may be configured to allow movement of the first engaging portion in the second direction.

[0021] The movable part can be configured such that, in response to an installation operation, it moves in a first direction by means of the attachment overcoming the force applied by the force-applying member, and in response to the engagement of the second engaging part with the first engaging part, it moves in a second direction by means of the applied force, thereby maintaining the engagement of the first engaging part with the second engaging part. The movable part can also be configured such that, in response to a locking release operation, it moves in the first direction by means of the attachment overcoming the force applied by the force-applying member, and allows the first engaging part to move circumferentially from a position engaged with the second engaging part to a position corresponding to the open part. In this case, the user can remove the attachment from the power tool through a series of operations, such as rotating the attachment to the position corresponding to the first engaging part and the open part, and then moving it in the second direction, thus facilitating operation.

[0022] In one embodiment of the present invention, the first engaging portion may be a locking piece capable of elastic deformation. The fixing member may be configured to cause the locking piece to elastically deform during movement of the locking piece in response to an installation operation. Alternatively, the fixing member may be configured to prevent elastic deformation of the locking piece during movement of the locking piece in response to a locking release operation, and further during movement in the second direction within the opening. In this case, the frequency of elastic deformation of the locking piece can be reduced, thereby extending the lifespan of the locking piece.

[0023] In one embodiment of the present invention, the power tool can be a blower configured to eject compressed air from a nozzle. Furthermore, the accessory can be a nozzle with a channel that communicates with the nozzle when the accessory is connected to the power tool. In this case, the user can easily change the nozzle to one of appropriate length and / or diameter according to the work being performed. Additionally, the nozzle can be reliably locked onto a blower with strong compressed air flow. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of an air dust collector.

[0025] Figure 2 This is a 3D view of the nozzle.

[0026] Figure 3 This is a side view of the nozzle.

[0027] Figure 4 yes Figure 3 Sectional view IV-IV.

[0028] Figure 5 It is a 3D diagram of a lock sleeve.

[0029] Figure 6 This is another 3D view of the lock.

[0030] Figure 7 This is a side view of the lock sleeve.

[0031] Figure 8 This is another side view of the lock.

[0032] Figure 9 yes Figure 7 IX-IX sectional view.

[0033] Figure 10 This is a 3D diagram of a slide sleeve.

[0034] Figure 11 This is the front view of the sliding sleeve.

[0035] Figure 12 yes Figure 11 Sectional view XII-XII.

[0036] Figure 13 This is a cross-sectional view of the locking mechanism.

[0037] Figure 14 This is an explanatory diagram illustrating the configuration relationship between the locking sleeve and the sliding sleeve.

[0038] Figure 15 This is a 3D view of the front cover and locking mechanism.

[0039] Figure 16 This is an illustration of the operation of the locking mechanism during the process of installing the nozzle into the air dust collector.

[0040] Figure 17 yes Figure 16 A magnified view of a portion of the image.

[0041] Figure 18 This is an illustration of the locking mechanism when the nozzle is configured in the installation position.

[0042] Figure 19 yes Figure 18 A magnified view of a portion of the image.

[0043] Figure 20 This is a three-dimensional view of the locking mechanism when the nozzle is positioned in the installation position.

[0044] Figure 21 This is an illustration of the locking mechanism's operation during the process of removing the nozzle from the air dust collector.

[0045] Figure 22 This is a 3D view of the locking mechanism during the process of removing the nozzle from the air dust collector.

[0046] Figure 23 This is an illustration of the locking mechanism when the nozzle is in the removed position.

[0047] Figure 24 It is a three-dimensional view of the nozzle and locking mechanism, which are separate from the air dust collector.

[0048] [Explanation of reference numerals in the attached figures]

[0049] 1: Air dust collector; 4: Front cover; 5: Locking mechanism; 8: Nozzle; 11: Main body housing; 110: Inlet; 12: Cylindrical part; 13: Handle; 131: Trigger; 132: Switch; 19: Battery; 31: Motor; 32: Output shaft; 33: Compression mechanism; 34: Fan; 40: Spray outlet; 41: Front end; 42: Base; 51: Locking sleeve; 511: Guide groove; 513: Locking groove; 514: Locking surface; 515: Guide part; 516: Inclined surface; 51 7: Open slot; 519: Protrusion; 53: Sliding sleeve; 531: Spring bearing part; 533: Guide protrusion; 535: Bearing recess; 536: Abutting surface; 538: Restricting part; 539: Recess; 55: Force-applying spring; 59: Nut; 80: Spray outlet; 81: Mounting part; 82: Locking piece; 83: Claw; 831: Front end face; 833: Rear end face; 835: Inclined surface; 84: Working protrusion; 841: Rear end face; 87: Channel part; 870: Channel; A1: Rotation axis. Detailed Implementation

[0050] Next, the air dust collector 1 according to the embodiment will be described with reference to the drawings. The air dust collector 1 is an example of a power tool and is a type of blower that can blow away dust and the like by ejecting compressed air.

[0051] First, the structure of the air dust collector 1 will be briefly described.

[0052] As Figure 1 shown, the air dust collector 1 has a main body housing 11 and a handle 13. The air dust collector 1 is configured as an electric multi-stage blower, and a motor 31 and a compression mechanism 33 including a plurality of fans 34 are housed in the main body housing 11. The output shaft 32 of the motor 31 and the fans 34 are driven to rotate about the rotation axis A1. The main body housing 11 extends along the rotation axis A1, has a suction port 110 at one end in its axial direction, and has a discharge port 40 at the other end in its axial direction. The handle 13 is a part held by the user and protrudes from the main body housing 11.

[0053] In addition, in the following description, for convenience, the extending direction of the rotation axis A1 is defined as the front-rear direction of the air dust collector 1. In the front-rear direction, the discharge port 40 side is defined as the front side, and the opposite side (the suction port 110 side) is defined as the rear side. The direction orthogonal to the rotation axis A1 and corresponding to the extending direction of the handle 13 is defined as the up-down direction. In the up-down direction, the protruding end side of the handle 13 is defined as the lower side, and the opposite side (the main body housing 11 side) is defined as the upper side. The direction orthogonal to the front-rear direction and the up-down direction is defined as the left-right direction.

[0054] A trigger 131 is provided at the upper end of the handle 13. A switch 132 is housed inside the handle 13. A battery 19 for supplying power to the motor 31 is detachably attached to the lower end of the handle 13. When the user presses the trigger 131, the switch​​​​​​​

[0057] First, the structure of nozzle 8 will be explained. For example... Figures 2-4 As shown, nozzle 8 is a cylindrical component with a through hole extending along the axial direction. In this embodiment, nozzle 8 is a single component formed entirely of synthetic resin.

[0058] The nozzle 8 includes a mounting portion 81 and a channel portion 87 coaxially connected. The mounting portion 81 is connected to the air dust collector 1 (more specifically, the locking mechanism 5 (see reference)). Figure 1 The channel portion 87 extends axially from one end of the mounting portion 81. Furthermore, in the following description, the orientation of the nozzle 8 when it is connected to the air dust collector 1 is taken as a reference, and for convenience, the axial direction of the nozzle 8 is defined as the front-rear direction. Therefore, in the front-rear direction, the mounting portion 81 side (the side connected to the air dust collector 1) is the rear side of the nozzle 8, and the channel portion 87 side is the front side of the nozzle 8.

[0059] The mounting portion 81 is generally cylindrical. The mounting portion 81 has a pair of locking tabs 82 capable of engaging with the locking mechanism 5. The pair of locking tabs 82 are symmetrically arranged across the axis of the nozzle 8 and extend axially. The locking tab 82 is the portion between two slits extending forward from the rear end of the mounting portion 81. Therefore, the rear end of the locking tab 82 (hereinafter also referred to as the locking end) is a free end. With this structure, the locking tab 82 can elastically deform radially around its front end as a fulcrum in the nozzle 8.

[0060] The locking end of the locking piece 82 has a claw 83. The claw 83 protrudes radially inward from the rear end of the locking piece 82. The claw 83 has a front end face 831, a rear end face 833, and an inclined face 835. The front end face 831 and the rear end face 833 are respectively surfaces that are approximately orthogonal to the axis of the nozzle 8. The inclined face 835 is a surface that connects one radially inward end of the front end face 831 and one radially inward end of the rear end face 833, and is inclined radially outward in the rearward direction.

[0061] Additionally, the locking end has a working protrusion 84. The working protrusion 84 protrudes radially outward from the outer surface of the locking end. The circumferential center of the working protrusion 84 is located at the same position as the circumferential center of the claw 83. Furthermore, the working protrusion 84 is positioned slightly forward of the claw 83, and its rear end is positioned slightly forward of the rear end of the locking end (the rear end face 833 of the claw 83). When viewed from the radial outward, the rear end face 841 of the working protrusion 84 is formed into a U-shape with the central portion protruding rearward. That is, the rear end face 841 of the working protrusion 84 is configured as a curved surface.

[0062] The channel portion 87 is formed as a cylindrical shape with its outer diameter decreasing towards the front (i.e., tapering at the front end). The channel portion 87 defines a channel 870. When the nozzle 8 is installed in the air dust collector 1, the channel 870 communicates with the nozzle outlet 40 (see reference). Figure 1 When the nozzle 8 is installed in the air dust collector 1, compressed air flows into the channel 870 from the nozzle outlet 40 and is ejected from the nozzle outlet 80 at the top of the channel portion 87. In addition, the inner diameter of the channel portion 87, that is, the diameter of the channel 870, is approximately uniform.

[0063] The structure around the nozzle 40 of the air dust collector 1 will be described below.

[0064] like Figure 1 As shown, the main housing 11 of the air dust collector 1 includes a cylindrical portion 12 and a front cover 4 connected to the front end of the cylindrical portion 12. In this embodiment, the front cover 4 is a component formed separately from the cylindrical portion 12. The front cover 4 is threaded onto the front end of the cylindrical portion 12 to cover the opening at the front end of the cylindrical portion 12. The front cover 4 is integrally formed into a funnel shape (conical shape) that tapers at the front end, and has a cylindrical front end 41. A base portion 42 with a generally annular front end face is provided on the rear side of the front end 41. A locking mechanism 5 is mounted on the front end 41. The nozzle 8 is attached to and detached from the front end 41 via the locking mechanism 5.

[0065] The locking mechanism 5 will now be described. The locking mechanism 5 is configured to lock the nozzle 8 relative to the air dust collector 1 in a predetermined installation position. The locking mechanism 5 includes a locking sleeve 51, a sliding sleeve 53, and a force-applying spring 55, wherein the locking sleeve 51 is fixed to the air dust collector 1; the sliding sleeve 53 is configured to move only in the back-and-forth direction relative to the locking sleeve 51; and the force-applying spring 55 applies a force to the sliding sleeve 53 in the forward direction relative to the locking sleeve 51.

[0066] like Figures 5-9 As shown, the locking sleeve 51 is a cylindrical component. In this embodiment, the locking sleeve 51 is formed of synthetic resin. The locking sleeve 51 has a front end portion 41 (see reference 41) connected to the front cover 4. Figure 1 The outer diameter is approximately equal to the inner diameter. The locking sleeve 51 is coaxially embedded in the front end 41 of the front cover 4 and is fixed to the front cover 4, as will be described in detail later.

[0067] Locking sleeve 51 is configured to hold sliding sleeve 53 (see reference) Figure 1The lock sleeve 51 is designed to move only in the front-to-back direction (i.e., only along its axial direction). More specifically, a pair of guide grooves 511 are formed on the outer peripheral surface of the lock sleeve 51. The pair of guide grooves 511 are symmetrically arranged across the axis of the lock sleeve 51. Each guide groove 511 is a recessed portion that extends radially inward from the outer peripheral surface of the lock sleeve 51 and extends forward (parallel to the axis) in a straight line from the rear end of the lock sleeve 51. The front end of the guide groove 511 is located between the front end and the central portion of the lock sleeve 51. The front end of the guide groove 511 is designed to abut against the sliding sleeve 53, thus functioning as a stop surface to prevent the sliding sleeve 53 from moving further forward.

[0068] Furthermore, the locking sleeve 51 is configured to engage with the nozzle 8. More specifically, the locking sleeve 51 has a mounting portion 81 for the nozzle 8 (see reference). Figure 4 The outer diameter of the locking sleeve 51 is approximately equal to the inner diameter of the locking piece 82 (excluding the inner diameter of the claw 83). A pair of locking grooves 513 are formed on the outer peripheral surface of the locking sleeve 51. The pair of locking grooves 513 are symmetrically arranged across the axis of the locking sleeve 51. The locking groove 513 is a recess that is radially inward from the outer peripheral surface of the locking sleeve 51 and extends circumferentially around the axis. The locking groove 513 is located between the front end and the central portion of the locking sleeve 51. The locking groove 513 is configured to engage with the claw 83 of the locking piece 82 of the nozzle 8 (see reference). Figure 4 ) Engagement. The front end face of the locking groove 513 abuts against the front end face 831 of the claw 83, and functions as a locking surface 514 to prevent the nozzle 8 from moving further forward.

[0069] A guide portion 515 is provided on the front side of each locking groove 513 to smoothly guide the claw 83 of the locking piece 82 into the locking groove 513. The guide portion 515 is a recess that is radially inward from the outer peripheral surface of the locking sleeve 51, and extends from the front end of the locking sleeve 51 to near the front end of the locking groove 513. The depth of the guide portion 515 gradually decreases from the front end of the locking sleeve 51 to the rear. That is, the guide portion 515 has an inclined surface 516 that slopes gently radially outward in the rearward direction. The rear end of the inclined surface 516 is connected to the outer peripheral surface of the locking sleeve 51.

[0070] Furthermore, an open groove 517 is connected to one end of each locking groove 513 in the circumferential direction. More specifically, the open groove 517 is connected to one of the two ends of the locking groove 513 in the circumferential direction, the end located on the clockwise side when the locking sleeve 51 is viewed from the front. The open groove 517 is a recess having approximately the same depth as the locking groove 513 and extends forward in a straight line to the front end of the locking sleeve 51. That is, the front end of the open groove 517 is open. The open groove 517 is provided to allow the claw 83 of the locking piece 82 to disengage from the locking groove 513 (i.e., to allow the nozzle 8 to move forward), and the width of the open groove 517 in the circumferential direction is slightly larger than the width of the claw 83 of the locking piece 82.

[0071] like Figures 10-13 As shown, the sliding sleeve 53 is a cylindrical component. In this embodiment, the sliding sleeve 53 is formed of synthetic resin. The sliding sleeve 53 is disposed radially outside the locking sleeve 51. Furthermore, a force-applying spring 55 (see reference) is disposed radially between the locking sleeve 51 and the sliding sleeve 53. Figure 13 Furthermore, the force-applying spring 55 in this embodiment is a compression coil spring. Therefore, the sliding sleeve 53 has an inner diameter larger than the outer diameter of the locking sleeve 51 and the diameter of the force-applying spring 55. Additionally, a spring-supporting portion 531 is provided inside the sliding sleeve 53. The spring-supporting portion 531 is an annular portion protruding radially inward from the inner circumference of the sliding sleeve 53. The inner diameter of the spring-supporting portion 531 is approximately equal to the outer diameter of the locking sleeve 51.

[0072] As described above, the sliding sleeve 53 is held in place by the locking sleeve 51 so that it can only move in the back-and-forth direction. Therefore, the sliding sleeve 53 has a pair of guide protrusions 533 that can engage with a pair of guide grooves 511 of the locking sleeve 51, respectively. The guide protrusions 533 are protrusions that extend further radially inward from the spring receiving portion 531 and have a shape that matches the guide grooves 511. By engaging the guide protrusions 533 with the guide grooves 511, rotation of the sliding sleeve 53 relative to the locking sleeve 51 is prohibited (i.e., the sliding sleeve 53 is positioned circumferentially relative to the locking sleeve 51). Within the range where the guide protrusions 533 can slide within the guide grooves 511, the sliding sleeve 53 can move relative to the locking sleeve 51 only in the back-and-forth direction.

[0073] Additionally, the sleeve 53 has a pair of receiving recesses 535, which can engage with the working protrusion 84 (see reference) provided on the mounting portion 81 of the nozzle 8. Figure 2 (Interlocking) A pair of receiving recesses 535 are symmetrically arranged across the axis of the sleeve 53. The receiving recess 535 is a recess that extends rearward from the front end of the sleeve 53, and when viewed from the radial outside, it is formed in a U-shape that approximately matches the working protrusion 84 of the nozzle 8. The surface of the receiving recess 535 is defined as an abutment surface 536 that can abut against the rear end surface 841 of the working protrusion 84, and is configured as a curved surface. In the abutment surface 536, when the sleeve 53 is viewed from the front, the end located on the clockwise side is connected to the front end surface of the sleeve 53 in a manner that is more gently inclined than the end on the opposite side. Furthermore, the rear end of the receiving recess 535 is located in front of the spring receiving portion 531.

[0074] The locking sleeve 51, sliding sleeve 53 and force spring 55 having the above structure are assembled on the front end 41 of the front cover 4 in the following order.

[0075] like Figure 14As shown, firstly, the operator aligns the guide groove 511 with the guide protrusion 533 in the circumferential direction, and then inserts the sliding sleeve 53 into the radially outer side of the locking sleeve 51 from the rear end side. Accordingly, the receiving recess 535 of the sliding sleeve 53 is positioned in the circumferential direction at approximately the same position as the guide portion 515 and the locking groove 513 of the locking sleeve 51 (i.e., positioned in a straight line extending in the front-rear direction when viewed from the side).

[0076] like Figure 13 As shown, the operator inserts the force-applying spring 55 between the locking sleeve 51 and the sliding sleeve 53 from the rear end. Furthermore, as... Figure 7 and Figure 8 As shown, four protrusions 519 are evenly spaced circumferentially on the outer peripheral surface of the rear end of the locking sleeve 51. The protrusions 519 protrude radially outward from the outer peripheral surface of the locking sleeve 51 and extend forward (parallel to the axis) in a straight line from the rear end of the locking sleeve 51. The distance between the protruding ends of two axially opposed protrusions 519 is slightly larger than the inner diameter of the force spring 55. Therefore, when the rear end of the force spring 55 is inserted into the rear end of the locking sleeve 51 (refer to...),... Figure 16 The force spring 55 is stably held in place by the protrusion 519, thereby preventing the force spring 55 from tilting or bending. Furthermore, as... Figure 10 and Figure 11 As shown, four recesses 539 corresponding to the protrusions 519 of the locking sleeve 51 are provided on the spring receiving portion 531 of the sliding sleeve 53. As described above, when the sliding sleeve 53 is inserted into the locking sleeve 51, the recesses 539 allow the protrusions 519 to pass through.

[0077] Furthermore, the operator inserts the locking sleeve 51, sliding sleeve 53, and force-applying spring 55 into the front end portion 41 of the front cover 4 from the front side. The operator presses these components rearward until the rear end of the locking sleeve 51 abuts against the front end face of the base portion 42, and tightens the nut 59 into the external thread portion provided at the front end portion 41. Additionally, the nut 59 has an outer diameter smaller than the outer diameter of the locking sleeve 51. Through the axial force of the nut 59, the locking sleeve 51 is fixed in a manner that makes it substantially immobile relative to the front cover 4.

[0078] The force-applying spring 55 is compressed while its front and rear ends abut against the rear end face of the spring-bearing portion 531 of the sliding sleeve 53 and the front end face of the base portion 42, respectively, thus applying force forward to the sliding sleeve 53. Accordingly, the sliding sleeve 53 is held in the position where the front end face of the guide protrusion 533 abuts against the front end face of the predetermined guide groove 511 (i.e., the foremost position) when the nozzle 8 is not installed in the locking mechanism 5. Furthermore, as... Figure 15 As shown, the receiving recess 535 of the sliding sleeve 53 is disposed radially outside the guide portion 515 of the locking sleeve 51.

[0079] The operation of locking mechanism 5 will now be explained.

[0080] First, the operation of the locking mechanism 5 when the nozzle 8 is installed in the air dust collector 1 will be explained.

[0081] When installing the nozzle 8 onto the air dust collector 1, the user performs an operation to move the nozzle 8 in a straight line backward toward the air dust collector 1 (hereinafter also referred to as the installation operation). More specifically, with the circumferential position of the nozzle 8 adjusted to the appropriate position relative to the locking mechanism 5, the user performs an operation to press the nozzle 8 into the locking mechanism 5 from the front along the rotation axis A1. Furthermore, the markings for position adjustment can be made using the working protrusion 84 provided on the outer surface of the locking piece 82 of the nozzle 8 (see reference). Figure 2 ) and the bearing recess 535 of the sliding sleeve 53 (refer to Figure 15 As described above, a claw 83 is provided radially inside the working protrusion 84, and a guide portion 515 of the locking sleeve 51 is disposed radially inside the receiving recess 535. Therefore, aligning the positions of the working protrusion 84 and the receiving recess 535 in the circumferential direction is equivalent to aligning the positions of the claw 83 and the guide portion 515, and further equivalent to aligning the positions of the claw 83 and the locking groove 513.

[0082] When the user presses the nozzle 8 into the locking mechanism 5, the claws 83 of a pair of locking tabs 82 abut against a pair of guides 515 of the locking sleeve 51. More specifically, the inclined surface 835 of the claws 83 abuts against the inclined surface 516 of the guides 515. In this state, as the nozzle 8 moves rearward, the locking tabs 82 elastically deform by moving their locking ends radially outward. When the user further presses the nozzle 8 rearward (causing the nozzle 8 to move), as... Figure 16 and Figure 17 As shown, the rear end face 833 of the claw 83 abuts against the contact surface 536 of the bearing recess 535 of the sliding sleeve 53, overcoming the applied force of the force-applying spring 55, causing the sliding sleeve 53 to move rearward relative to the locking sleeve 51. The portion of the mounting portion 81 of the nozzle 8, except for the locking piece 82, enters the gap between the locking sleeve 51 and the sliding sleeve 53.

[0083] When the claw 83 crosses the inclined surface 516 of the guide portion 515 over the outer peripheral surface of the locking sleeve 51 and reaches the locking groove 513, as Figures 18-20 As shown, due to the restoring force of the locking piece 82, the claw 83 moves radially inward and returns to its initial position, engaging with the locking groove 513. At this time, the rear end face 833 of the claw 83 disengages from the abutment face 536 of the receiving recess 535, and the rearward pushing pressure on the sliding sleeve 53 is released. Therefore, the sliding sleeve 53 moves forward by the applied force of the force spring 55, thereby holding the abutment face 536 of the receiving recess 535 in abutment against the rear end face 841 of the working protrusion 84 of the nozzle 8 (hereinafter also referred to as the locked position). That is, as Figure 20As shown, the working protrusion 84 is held in a state of being fitted into the receiving recess 535.

[0084] like Figure 19 As shown, when the sliding sleeve 53 is positioned in the locked position, the portion (wall portion) of the sliding sleeve 53 located between the rear end (deepest part of the recess) of the receiving recess 535 and the front end of the spring receiving portion 531 is positioned radially outward from the rear end (pawl 83) of the locking piece 82. This wall portion functions as a limiting portion 538, which maintains the engagement of the pawl 83 with the locking groove 513 by limiting the elastic deformation of the locking piece 82 in the direction in which the pawl 83 disengages from the locking groove 513. Furthermore, as described above, when the sliding sleeve 53 is subjected to a forward force, the nozzle 8 is restricted from rotating about the rotation axis A1 by engaging the receiving recess 535 with the working protrusion 84.

[0085] In this way, the locking mechanism 5 locks the nozzle 8 in a position where the claw 83 engages with the locking groove 513 (more specifically, the position where the front end face 831 abuts against the locking surface 514 of the locking groove 513; the position of the nozzle 8 at this time will also be referred to as the mounting position below), preventing the nozzle 8 from moving forward. In addition, the locking mechanism 5 restricts the rotation of the nozzle 8 configured in the mounting position.

[0086] The following describes the operation of the locking mechanism 5 when the nozzle 8 is removed from the air dust collector 1.

[0087] Users will Figures 18-20 When the nozzle 8, locked in the installation position as shown, is removed from the air dust collector 1, firstly, in order to release the lock of the locking mechanism 5, an operation is performed to rotate the nozzle 8 about the axis relative to the air dust collector 1 (hereinafter also referred to as the lock release operation). More specifically, the user grasps the nozzle 8 and rotates it clockwise about the rotation axis A1 when viewed from the front. As described above, the sleeve 53 is forced forward in a non-rotatable state, and the working protrusion 84 is engaged in the receiving recess 535. When the user overcomes the applied force of the force spring 55 and rotates the nozzle 8, the end of the working protrusion 84 on the rotation direction side (clockwise side when viewed from the front) of the rear end face 841 (bent surface) and the end of the receiving recess 535 on the rotation direction side work together to convert the circumferential force into an axial force and act on the sleeve 53, thereby moving the sleeve 53 rearward. Furthermore, since the end of the contact surface 536 of the recess 535 on the rotation direction side is gently inclined, the user can overcome the applied force of the force spring 55 and make the nozzle 8 rotate more easily.

[0088] like Figure 21 and Figure 22As shown, after the working protrusion 84 disengages from the receiving recess 535, the pawl 83 moves circumferentially within the locking groove 513, while the nozzle 8 rotates with the rear end face 841 of the working protrusion 84 abutting against the front end face of the sliding sleeve 53. When the user continues to rotate the nozzle 8, the pawl 83 enters the open groove 517 (see reference). Figure 6 (within) For example Figure 23 As shown, when the claw 83 is fully positioned within the open slot 517 (the position of the nozzle 8 at this time is also referred to as the removed position), the locking of the claw 83 relative to the locking slot 513 is released, allowing the claw 83 to move forward along the open slot 517. That is, the locking mechanism 5 is released.

[0089] After rotating the nozzle 8 to the detached position, the user moves the nozzle 8 forward in a straight line relative to the air dust collector 1 to perform a separation operation (hereinafter also referred to as the separation operation). More specifically, the user pulls the nozzle 8 forward from the locking mechanism 5 along the rotation axis A1. As described above, the open groove 517 has approximately the same depth as the locking groove 513. Therefore, when the nozzle 8 moves forward in response to the separation operation, the locking piece 82 does not elastically deform, and the claw 83 can move forward within the open groove 517. In addition, as the nozzle 8 moves forward and separates from the air dust collector, the sliding sleeve 53 is moved to its foremost position by the force spring 55 (see reference). Figure 13 ).like Figure 24 As shown, the disassembly of nozzle 8 is completed when nozzle 8 is separated from air dust collector 1 (locking mechanism 5).

[0090] As explained above, the connection structure between the air dust collector 1 and the nozzle 8 in this embodiment includes a locking mechanism 5. The locking mechanism 5 is configured to operate in response to a user's installation operation, even if the nozzle 8 moves rearward relative to the air dust collector 1. Therefore, when installing the nozzle 8 onto the air dust collector 1, the user only needs to move the nozzle 8 in one direction (rearward). Therefore, compared to cases where the nozzle 8 needs to be operated in two directions (e.g., the axial direction and the circumferential direction around the axis), the connection structure of this embodiment offers superior operability. In particular, in this embodiment, the installation operation of the nozzle 8 is an operation that moves the nozzle 8 rearward in a straight line towards the air dust collector 1 (the operation of pressing the nozzle 8 into the locking mechanism 5). Therefore, as envisioned in the installation of the nozzle 8, the user can install the nozzle 8 onto the air dust collector 1 through the simplest and most easily understood operation.

[0091] Furthermore, the locking mechanism 5 is configured to lock the nozzle 8 in the mounting position so that it cannot move forward, in response to the nozzle 8 being positioned relative to the air purifier 1 in the mounting position. Since the locking mechanism 5 operates automatically only during the installation operation of the nozzle 8, the user does not need to operate the air purifier 1 or the locking mechanism 5 itself. Therefore, an operable connection structure is achieved in this respect. Moreover, since the locking mechanism 5 prevents the nozzle 8 from moving forward, even if the user pulls the nozzle 8 forward in the direction opposite to the installation operation, the locking mechanism 5 will not detach from the air purifier 1. Therefore, the nozzle 8 can be reliably locked. In particular, the ability to reliably lock the nozzle 8 is useful in blowers that utilize compressed air to generate relatively strong airflow, such as the air purifier 1.

[0092] The locking mechanism 5 of this embodiment includes a locking sleeve 51, a sliding sleeve 53, and a force-applying spring 55. The locking sleeve 51 is fixed to the air dust collector 1. The sliding sleeve 53 is configured to move only in the forward-backward direction relative to the locking sleeve 51. The force-applying spring 55 applies a force to the sliding sleeve 53 relative to the locking sleeve 51. In response to the installation operation of the nozzle 8, the sliding sleeve 53 moves backward against the force applied by the force-applying spring 55 via the nozzle 8. Then, in response to the nozzle 8 being positioned in the installation position and the locking piece 82 (specifically, the claw 83) of the nozzle 8 engaging with the locking groove 513, the sliding sleeve 53 is moved forward by the force applied by the force-applying spring 55, thereby maintaining the engagement of the locking piece 82 with the locking groove 513. Thus, in this embodiment, by using a sliding sleeve 53 that can move in response to the movement of the nozzle 8, a reasonable structure that can automatically lock the nozzle 8 is achieved.

[0093] In particular, in this embodiment, the forward movement of the nozzle 8 is prevented by locking the elastically deformable locking piece 82 into the locking groove 513. When the nozzle 8 is positioned in the mounting position and the locking piece 82 engages with the locking groove 513, the limiting portion 538 of the sliding sleeve 53 is positioned radially outward of the locking piece 82, thereby limiting the elastic deformation of the locking piece 82. With this structure, the locking of the locking piece 82 relative to the locking groove 513 can be reliably prevented from being released.

[0094] Furthermore, the locking mechanism 5 in this embodiment is configured to not only prevent the nozzle 8, which is positioned in the mounting position, from moving forward, but also restrict the nozzle 8 from rotating about its axis. Therefore, the locking mechanism 5 can lock the nozzle 8 more reliably. In particular, in this embodiment, this function is achieved through a simple structure such as a receiving recess 535 provided in the sliding sleeve 53 and capable of restricting the rotation of the nozzle 8 about its axis by engaging with the working protrusion 84 of the nozzle 8.

[0095] Furthermore, the locking mechanism 5 is configured to release the lock on the nozzle 8 (i.e., prevent the nozzle 8 from moving forward) in response to a user's lock release operation on the nozzle 8, even if the nozzle 8 is rotated around its axis. Therefore, similar to the installation operation of the nozzle 8, the user can release the lock simply by rotating the nozzle 8 without operating the air dust collector 1 or the locking mechanism 5 itself, making operation easy. Moreover, the lock release operation of rotating the nozzle 8 and the installation operation of moving the nozzle 8 backward are operations in completely different directions, making the operation easy to understand.

[0096] Furthermore, the sliding sleeve 53 is configured such that, in response to a locking release operation, the nozzle 8 moves rearward against the applied force of the force spring 55, thereby allowing the locking piece 82 (specifically, the claw 83) to move circumferentially from a position engaged with the locking groove 513 to a position corresponding to the open groove 517. Therefore, by rotating the nozzle 8 to the position where the claw 83 corresponds to the open groove 517 and then moving it forward, the user can easily remove the nozzle 8 from the air dust collector 1. In addition, in this embodiment, the working protrusion 84 of the nozzle 8 and the receiving recess 535 of the sliding sleeve 53 (specifically, the curved surface on the rotation direction side of the rear end face 841 and the abutment surface 536) cooperate to cause the sliding sleeve 53 to move rearward in response to the rotation of the nozzle 8. That is, the working protrusion 84 and the receiving recess 535 have the functions of limiting the rotation of the nozzle 8 about the axial direction when the nozzle 8 is positioned in the installation position and converting the rotation of the nozzle 8 into a linear movement of the sliding sleeve 53. In this way, two functions are reasonably achieved through a simple structure such as the working protrusion 84 and the bearing recess 535.

[0097] Furthermore, in this embodiment, during the movement of the locking piece 82 relative to the locking sleeve 51 in response to the installation operation, the locking sleeve 51 causes the locking piece 82 to elastically deform. On the other hand, during the movement of the locking piece 82 in response to the locking release operation, and further forward within the open groove 517, the locking sleeve 51 does not cause the locking piece 82 to elastically deform. Specifically, a portion (inclined surface 516 and outer peripheral surface) is provided on the front side of the locking groove 513 in the locking sleeve 51, which abuts against the claw 83 and causes the locking piece 82 to move radially outward. On the other hand, the locking groove 513 and the open groove 517 are continuously formed in the circumferential direction and have a depth that allows the claw 83 to be received without causing the locking piece 82 to elastically deform. With such a structure, the frequency of elastic deformation of the locking piece 82 can be reduced, thereby achieving a long service life for the locking piece 82.

[0098] The following illustrates the correspondence between the structural elements of the above embodiments and the structural elements of the present invention. However, the structural elements of the embodiments are merely examples and do not limit the structural elements of the present invention.

[0099] Air dust collector 1 is an example of "power tool" and "blower". Nozzle 8 is an example of "accessory" and "nozzle". Locking mechanism 5 is an example of "locking mechanism". Lock sleeve 51, sliding sleeve 53, and force-applying spring 55 are examples of "fixed part", "movable part", and "force-applying part", respectively. Locking piece 82 is an example of "first engaging part" and "locking piece". Locking groove 513 is an example of "second engaging part" and "locking recess". Restricting part 538 is an example of "restricting part". Working protrusion 84 is an example of "protrusion". Bearing recess 535 is an example of "recess". Opening groove 517 is an example of "opening".

[0100] Furthermore, the above embodiments are merely illustrative, and the connection structure between the power tool and the accessory involved in this invention is not limited to the illustrated connection structure between the air dust collector 1 and the nozzle 8. For example, the following illustrated modifications can be added. In addition, at least one of these modifications can be used in combination with any of the connection structures illustrated in the embodiments and the technical solutions described in the claims.

[0101] For example, the power tool is not limited to the air dust collector 1, which is a multi-stage blower, but can also be other types of power tools that can be equipped with attachments. Furthermore, the attachment is not limited to the nozzle 8, and its type can be appropriately varied depending on the power tool to which the attachment is connected. For example, the connection structure involved in this invention is preferably applicable to the connection structure between power tools configured to blow or suck air, such as blowers and dust collectors, and various nozzles, as well as the connection structure between rotary tools (e.g., electric drills, hammer drills) capable of performing dust-generating operations and dust collection hoods covering the top of the tool. The power tool can also be configured to operate by power supplied by an external AC power source, rather than by the battery 19.

[0102] In the above embodiment, as an example of an accessory, a nozzle 8 is shown that is entirely formed of synthetic resin. However, the structure of the nozzle, which can be installed in an air dust collector 1, a blower, a dust collector, etc., can be appropriately modified. For example, only the mounting portion 81 of the nozzle 8 can be formed of synthetic resin, while the channel portion 87 can be formed of an elastomer. In this case, the mounting portion 81 and the channel portion 87 can be integrally molded or formed as separate parts and integrated with each other by means of welding or the like. According to such a modified nozzle, since the channel portion 87 constituting the front part of the nozzle can be elastically deformed, the possibility of nozzle (e.g., locking piece 82) breaking when the nozzle collides with something can be reduced. In addition, even when manufacturing various nozzles with different lengths or diameters of the channel portion 87, the same mold can be used to manufacture the mounting portion 81, thus offering an advantage in terms of cost.

[0103] The configuration and structure of the locking mechanism 5 can be changed independently of changes to the power tools and accessories, or suitably according to changes to the power tools and accessories. The following examples illustrate changes that can be added to the locking mechanism 5.

[0104] For example, at least a portion of the locking mechanism 5 may be located on an accessory rather than on the power tool.

[0105] The locking mechanism 5 only needs to be able to lock the accessory positioned in the installation position so that it cannot move in the opposite direction to the direction of movement when the power tool is installed. For example, the structure for locking the accessory is not limited to the locking piece 82 (pawl 83) and the locking groove 513. Instead, the accessory may have a recess, and the locking mechanism 5 (locking sleeve 51) may have a locking piece that can elastically deform.

[0106] The locking mechanism 5 does not necessarily restrict the rotation of the accessory. Alternatively, the rotation of the accessory can be restricted by a structure other than the locking mechanism 5. Or, the locking mechanism 5 can be configured to lock the accessory in its mounting position so that it cannot rotate.

[0107] For example, the working protrusion 84 and the receiving recess 535 in the above embodiment can also be configured to be rectangular when viewed from the radially outer side, to prevent rotation of the nozzle 8 disposed in the mounting position. In this case, for example, to perform a locking release operation, it is sufficient to provide an operating part (e.g., a knob) on the slide sleeve 53 for the user to move the slide sleeve 53 rearward. Alternatively, for example, the locking groove 513 can also be configured to hold the claw 83 in a position where it cannot move circumferentially. That is, the open groove 517 connected to the locking groove 513 can also be omitted. In this case, the locking sleeve 51 is configured to allow the locking piece 82 to elastically deform and disengage forward from the locking sleeve 51 after the limiting part 538 of the slide sleeve 53 moves to the rear of the claw 83.

[0108] Furthermore, if only the function of moving the sleeve 53 rearward in response to the locking release operation is considered, the circumferential ends of the rear end face 841 of the working protrusion 84 and the abutment surface 536 of the receiving recess 535 do not need to be curved surfaces. Specifically, at least one of the rear end face 841 and the abutment surface 536 may include an inclined surface that slopes forward in the direction of rotation of the nozzle 8 during the locking release operation. In addition, the inclined surface may be a curved surface as described in the above embodiment, or it may be a plane.

[0109] Furthermore, in the above embodiment, the working protrusion 84 and the receiving recess 535 of the nozzle 8 (accessory) are located approximately at the same position in the circumferential direction as the claw 83 and the locking groove 513, respectively, and are positioned in a location that the user can visually confirm. Therefore, they serve as markers indicating the circumferential alignment of the locking piece 82 (claw 83) and the locking groove 513. However, the working protrusion 84 and the receiving recess 535 may also be positioned in a different location in the circumferential direction than the locking piece 82 (claw 83) and the locking groove 513. Additionally, the circumferential alignment markers of the nozzle 8 and the locking mechanism 5 are not limited to the working protrusion 84 and the receiving recess 535. From the viewpoint of facilitating operation, it is preferable to provide some kind of marker.

[0110] Furthermore, the structure, material, engagement structure, and configuration of the locking sleeve 51, sliding sleeve 53, and force spring 55 can be appropriately modified. For example, the locking sleeve 51 can be incorporated into a power tool. That is, the part of the power tool that has an accessory installed (e.g., the front end 41 of the air dust collector 1) can have a guide groove 511, a locking groove 513, an open groove 517, etc. The locking sleeve 51 and the sliding sleeve 53 can only move relative to each other in the back-and-forth direction by engaging the protrusion provided on the locking sleeve 51 with the groove provided on the sliding sleeve 53. The force spring 55 can also be an elastic component other than a compression coil spring (e.g., other types of springs (e.g., torsion springs, leaf springs), rubber).

[0111] Furthermore, in view of the spirit of the present invention, the above-described embodiments and their variations, the following methods are constructed. At least one of the following methods can be used in combination with any one of the above-described embodiments and their variations, and the technical solutions described in each claim.

[0112] [Method 1]

[0113] The locking mechanism is provided on the power tool.

[0114] [Method 2]

[0115] The movable component is a cylindrical component that is at least partially disposed radially outside the fixed component.

[0116] When the accessory is configured in the mounting position, the accessory is at least partially configured radially between the fixed member and the movable member.

[0117] [Method 3]

[0118] The locking recess is formed on the outer periphery of the fixing component.

[0119] The movable component is a cylindrical component disposed radially outside the fixed component.

[0120] The limiting part is configured such that, when the accessory is positioned in the mounting position, the limiting part is located radially outward of the locking piece to limit the elastic deformation of the locking piece radially outward.

[0121] [Method 4]

[0122] The locking piece is configured to move along the fixing member while elastically deforming in response to the installation operation, and when it reaches a position facing the locking recess, it engages with the locking recess by a restoring force.

[0123] [Method 5]

[0124] The fixing component has a first inclined surface, which is disposed on the second direction side of the locking recess and is inclined radially outward toward the first direction side.

[0125] Inclined surface 516 is an example of the "first inclined surface" in this method.

[0126] [Method 6]

[0127] At least one of the protrusion of the accessory and the recess of the movable member has a second inclined surface, which is inclined in the second direction as the accessory rotates toward the direction of the lock release operation.

[0128] The rear end face 841 of the working protrusion 84 and the abutment face 536 of the bearing recess 535 are examples of the "second inclined surface" of this method.

[0129] [Method 7]

[0130] The second engaging portion is a groove extending in the circumferential direction, and the open portion is a groove that connects to the end of the second engaging portion and extends in a straight line in the second direction to one end of the fixing member in the second direction.

Claims

1. A connection structure between a power tool and an accessory, characterized in that, It has a locking mechanism. The locking mechanism is configured such that, in response to a user's installation operation of the accessory, it operates as the accessory moves relative to the power tool in a first direction, and, in response to the accessory being positioned relative to the power tool in the installation position, the locking mechanism locks the accessory in the installation position in a manner that prevents it from moving in a second direction opposite to the first direction. The installation operation involves moving the accessory in a straight line toward the power tool in the first direction. The locking mechanism has a fixed component, a movable component, and a force-applying component, wherein... The fixing component is fixed to the power tool; The movable component is configured such that it can move only in the first direction and the second direction along a predetermined axis relative to the fixed component; The force-applying component applies a force to the movable component in the second direction relative to the fixed component.

2. The connection structure between the power tool and the accessory according to claim 1, characterized in that, The accessory has a first engaging portion. The fixing component has a second engaging portion configured to engage with the first engaging portion in response to the accessory being positioned in the mounting position, thereby preventing the accessory from moving in the second direction. The movable member is configured such that, in response to the installation operation, it moves in the first direction by means of the attachment overcoming the applied force of the force-applying member, and in response to the engagement of the first engaging portion with the second engaging portion, the movable member moves in the second direction by means of the applied force, and maintains the engagement of the first engaging portion with the second engaging portion.

3. The connection structure between the power tool and the accessory according to claim 2, characterized in that, The first engaging part is a locking piece that can elastically deform. The second engaging portion is a locking recess into which the locking piece can engage. The movable part has a limiting portion configured to restrict the elastic deformation of the locking piece when the accessory is positioned in the mounting position.

4. The connection structure between the power tool and the accessory according to claim 2, characterized in that, The locking mechanism is configured to restrict the accessory, which is positioned at the mounting location, from rotating about the axis.

5. The connection structure between the power tool and the accessory according to claim 4, characterized in that, The accessory has a protrusion. The movable part has a recess configured to restrict the attachment from rotating about the axis by engaging with the protrusion.

6. The connection structure between the power tool and the accessory according to claim 1, characterized in that, The locking mechanism is configured to unlock the accessory in response to the user's unlocking operation on the accessory.

7. The connection structure between the power tool and the accessory according to claim 6, characterized in that, The locking release operation is an operation that causes the accessory to rotate around a specified axis.

8. The connection structure between the power tool and the accessory according to claim 7, characterized in that, The accessory has a first engaging portion. The fixing component has a second engaging portion and an opening portion, wherein... The second engaging portion is configured to engage with the first engaging portion in response to the accessory being positioned in the mounting position, thereby preventing the accessory from moving in the second direction; The opening is configured to allow the first engaging portion to move in the second direction. The movable member is configured such that, in response to the installation operation, it moves in the first direction by means of the attachment overcoming the applied force of the force-applying member, and, in response to the second engaging portion engaging with the first engaging portion, the movable member moves in the second direction by means of the applied force, and maintains the engagement of the first engaging portion with the second engaging portion. Furthermore, the movable member is configured such that, in response to the locking release operation, it moves in the first direction by means of the attachment, overcoming the applied force of the force-applying member, and allows the first engaging portion to move circumferentially from a position engaged with the second engaging portion to a position corresponding to the open portion.

9. The connection structure between the power tool and the accessory according to claim 8, characterized in that, The first engaging part is a locking piece that can elastically deform. The fixing component is configured such that the locking piece elastically deforms during the movement of the locking piece in response to the installation operation, and is configured such that the locking piece does not elastically deform during the movement of the locking piece in response to the locking release operation and further during the movement of the locking piece in the second direction within the opening.

10. The connection structure between the power tool and the accessory according to any one of claims 1 to 9, characterized in that, The power tool is configured as a blower that ejects compressed air from a nozzle. The accessory is a nozzle and has a channel that communicates with the nozzle outlet when the nozzle is connected to the blower.

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