Blower

Abstract

To obtain an air blower which can improve workability during construction and maintenance work while adopting a structure in which a terminal cover cannot be opened without use of a tool and prevent loss of components.SOLUTION: An air blower 200 includes: an air blower body 1; an air blowing part; a power supply connection part 5; a terminal cover 6; and a lock member 7. The air blower body 1 is provided with a hole 1r which is open at the outside of the air blower body 1. The lock member 7 is provided with a connection part 7d which may be connected to a tool and has: a head part 7a which is exposed to the outside of the air blower body 1; leg parts 7b which are connected to the head part 7a and inserted into the hole 1r; and an arm part 7c connected to the head part 7a and exposed to the outside of the air blower body 1. A position of the lock member 7 may be changed between a lock position in which the arm part 7c contacts with the closed terminal cover 6 to lock an opening operation of the terminal cover 6 and a lock release position in which the arm part 7c is away from the closed terminal cover 6 to allow the opening operation of the terminal cover 6.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a blower including a terminal cover that covers a power connection portion.

Background Art

[0002] Conventionally, there is known a blower that is installed on a ceiling, wall surface, or floor surface of a building and generates an air flow by rotating a fan by driving a motor. In order to drive the motor, it is necessary to supply power to the motor from an external power source. Therefore, the blower includes a power connection portion that connects the motor and the external power source.

[0003] In addition, the blower includes a terminal cover that is openable and closes to cover the power connection portion in order to protect the power connection portion from moisture, dust, etc. For example, Patent Document 1 discloses a blower in which a power connection portion is installed inside a cylindrical protective frame and a terminal cover that covers the opening of the protective frame and the power connection portion is provided.

[0004] Due to the amendment of the "Interpretation of the Cabinet Order Establishing Technical Standards for Electrical Appliances" regarding the current Electrical Appliance Safety Act, in a blower that supplies power from an external power source to a motor, it is necessary to have a structure in which a user cannot access the power connection portion without using a tool such as a driver so that the user does not accidentally touch the power connection portion.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the technology disclosed in Patent Document 1 has a structure that allows the user to open the terminal cover and access the power connection part without using tools. In other words, the technology disclosed in Patent Document 1 does not have a structure that complies with the revised "Interpretation of the Ministerial Ordinance Establishing Technical Standards for Electrical Appliances" related to the Electrical Appliances and Materials Safety Act.

[0007] One way to achieve such a structure is to fix the terminal cover to the blower housing with screws. However, with this method, when opening the terminal cover for installation and maintenance work, the screws must be removed from the terminal cover and housing, the work must be done after opening the terminal cover, and then the terminal cover must be closed and re-secured to the housing with screws after the work is completed. Because the screws must be removed and re-attached each time the terminal cover is opened and closed, the work efficiency during installation and maintenance is poor, and there is a possibility that the removed screws may be lost during the work.

[0008] This disclosure is made in view of the above, and aims to provide a blower that has a structure that prevents the terminal cover from being opened without using tools, while improving workability during installation and maintenance work and preventing the loss of parts. [Means for solving the problem]

[0009] To solve the above-mentioned problems and achieve the objective, the blower according to this disclosure comprises a blower body, a blower section, a power connection section, a terminal cover, and a locking member. The blower body has a fan casing that forms an air passage. The blower body has an intake port for drawing in indoor air and an exhaust port for exhausting the drawn-in air. The blower section has a fan installed inside the fan casing that rotates by the drive of a motor. The blower section generates an airflow that flows into the blower body from the intake port and out from the exhaust port. The power connection section is provided on the blower body and connects the motor to an external power supply. The terminal cover is provided on the blower body so as to be openable and closable, and covers the power connection section when closed. The locking member is provided on the blower body so as to be movable, and can lock the opening operation of the terminal cover while also allowing the opening operation of the terminal cover. The blower body has a hole that opens to the outside of the blower body. The hole is located outside the area covered by the terminal cover when it is closed. A locking member is attached to the hole. The locking member has a head, legs, and arms. The head has a connecting portion to which a tool can be attached. The head is exposed to the outside of the blower body. The legs are connected to the head and inserted into the hole. The arms are connected to the head and exposed to the outside of the blower body. The position of the locking member can be changed between a locked position in which the arms contact the closed terminal cover to lock the opening operation of the terminal cover, and an unlocked position in which the arms are separated from the closed terminal cover to allow the opening operation of the terminal cover. The terminal cover has a holding portion that holds the locking member in the locked position. The holding portion is formed on the outer surface of the terminal cover, and includes a contact surface that contacts the arm portion in the locked position, a first rib formed at one end in the first direction of the contact surface and protruding from the outer surface of the terminal cover at a first height, and a second rib formed at the other end in the first direction of the contact surface and protruding from the outer surface of the terminal cover at a second height. When the position of the locking member is changed from the unlocked position to the locked position, the arm portion moves over the first rib and moves from one side to the other side in the first direction. When the position of the locking member is changed from the locked position to the unlocked position, the arm portion moves over the first rib and moves from the other side to the one side in the first direction. When the height of the arm portion is H1, the first height is H2, and the second height is H3, the relationship of H2 < H1 < H3 holds. The second rib has a vertical wall portion protruding from the outer surface of the terminal cover at the second height, and a horizontal wall portion protruding from the tip of the vertical wall portion toward the first rib in one direction of the first direction. The horizontal wall portion has a first surface facing the contact surface. The first rib has a second surface located at the tip of the first rib. An opening through which the arm portion can pass is formed between one end in the first direction of the first surface and the other end in the first direction of the second surface. The height of the opening is not more than the height of the arm portion. The shortest distance from one end in the first direction of the first surface to the other end in the first direction of the second surface is not less than 1.0 times and not more than 1.5 times the height of the arm portion. [Effects of the Invention]

[0010] According to this disclosure, the terminal cover cannot be opened without using tools, while simultaneously improving work efficiency during installation and maintenance, and preventing the loss of parts. [Brief explanation of the drawing]

[0011]

Figure 1

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Figure 16

[0012] The blower according to the embodiment will be described in detail below with reference to the drawings.

[0013] Embodiment 1. FIG. 1 is a cross-sectional view showing the mounting state of the ventilation fan 100 including the blower 200 according to Embodiment 1. FIG. 2 is a bottom view showing the ventilation fan 100 including the blower 200 according to Embodiment 1, showing a state where the decorative grill 4 is not attached and the terminal cover 6 is closed. FIG. 3 is a bottom view showing the ventilation fan 100 including the blower 200 according to Embodiment 1, showing a state where the decorative grill 4 is not attached and the terminal cover 6 is opened. FIG. 4 is an exploded perspective view showing the ventilation fan 100 including the blower 200 according to Embodiment 1, showing a state where the decorative grill 4 is not attached and the terminal cover 6 is closed. As shown in FIG. 1, the ventilation fan 100 includes a blower 200 and a duct 300. The ventilation fan 100 sucks indoor air by the operation of the blower 200 and exhausts it to the outside through the duct 300. The blower 200 includes a blower main body 1, a blowing unit 2, a duct connection port 3, and a decorative grill 4. Further, as shown in FIGS. 2 and 3, the blower 200 includes a power connection unit 5, a terminal cover 6, and a locking member 7.

[0014] As shown in FIG. 1, an installation hole 12a for communicating the indoor space and the ceiling space 13 is formed in the ceiling 12. In FIG. 1, the upper side of the ceiling 12 in the plane of the drawing is the ceiling space 13, and the lower side of the ceiling 12 in the plane of the drawing is the indoor space. The ventilation fan 100 is installed on the ceiling 12 using the installation hole 形 成 さ れ た 12a formed in the ceiling 12. Above the ceiling 12, a ceiling space 13 is formed. The ventilation fan 100 is installed across the installation hole 12a into the ceiling space 13. The ceiling space 13 is a space formed between the ceiling 12 and an upper structural body (not shown). The upper structural body is, for example, a beam or an upper floor slab.

[0015] The blower main body 1 has a box-shaped housing 1a and a fan casing 1b disposed inside the housing 1a to form the air passage of the fan 2b.

[0016] The housing 1a has an air intake port 1f for drawing in indoor air and an exhaust port 1g for exhausting the drawn-in air. The air intake port 1f is formed on the bottom surface 1c of the housing 1a. The bottom surface 1c of the housing 1a is the part that faces the room. The air intake port 1f draws in indoor air located directly below the ventilation fan 100. On the periphery of the air intake port 1f on the bottom surface 1c, a flange portion 1h is formed that protrudes horizontally away from the center of the air intake port 1f. A screw hole 1i, as shown in Figure 2, is formed in the flange portion 1h. The blower body 1 is fixed to the ceiling 12 by screwing a screw (not shown) into the ceiling 12 through the screw hole 1i. The exhaust port 1g is formed on one of the four sides 1e of the housing 1a.

[0017] An intake port 1k is formed on the bottom surface 1j of the fan casing 1b to draw in air that has flowed into the interior of the housing 1a from the intake port 1f. The bottom surface 1j of the fan casing 1b is the part that faces the room. An outlet port 1m is formed on one side of the fan casing 1b to allow air from inside the fan casing 1b to flow out toward the exhaust port 1g. The fan casing 1b is fixed to the housing 1a by screws (not shown). A spring fixing part 1n is attached to the bottom surface 1j of the fan casing 1b.

[0018] The blower unit 2 is located inside the blower body 1 and generates an airflow that flows into the blower body 1 from the intake port 1f and out from the exhaust port 1g. The blower unit 2 has a motor 2a and a fan 2b.

[0019] Motor 2a rotates fan 2b. Motor 2a is fixed to the top surface 1d of housing 1a by screws 11. Fan 2b is installed inside fan casing 1b and rotates when driven by motor 2a. Fan 2b is attached to the shaft 2c of motor 2a.

[0020] The decorative grille 4 is positioned on the interior-facing surface of the ceiling 12 so as to cover the installation hole 12a from the interior side. The decorative grille 4 covers the bottom surface 1c of the housing 1a. The decorative grille 4 is a decorative component that hides internal components such as the fan casing 1b from being visible from the interior side. This ensures that the appearance of the ventilation fan 100 when viewed from the interior side is not compromised. The decorative grille 4 has a spring 4a. The spring 4a is attached to the decorative grille 4 by a spring fixing component 4b. The decorative grille 4 is fixed to the fan casing 1b by hooking the spring 4a onto the spring fixing part 1n attached to the fan casing 1b.

[0021] The duct connection port 3 is a component to which the duct 300 is connected, detachably attached to the side surface 1e of the housing 1a so as to communicate with the exhaust port 1g. The duct connection port 3 extends from the side surface 1e of the housing 1a in a direction perpendicular to the side surface 1e. The duct connection port 3 plays the role of extending the air discharge position from the housing 1a to a position that communicates with the duct 300. The outer shape of the duct connection port 3 is stepped, with sections of different diameters. The stepped shape of the outer shape of the duct connection port 3, with sections of different diameters, allows one duct 300 selected from multiple ducts 300 with different inner diameters to be connected to the duct connection port 3, and also facilitates the wrapping of tape to secure the duct 300 to the duct connection port 3.

[0022] A shutter 8 that opens and closes due to air pressure is installed inside the duct connection port 3. The shutter 8 opens due to air pressure when the ventilation fan 100 is operating, and closes the inside of the duct connection port 3 by its own weight when the ventilation fan 100 is stopped. By installing the shutter 8 inside the duct connection port 3, it is possible to prevent outside air from entering the room through the duct 300 when the ventilation fan 100 is stopped.

[0023] Duct 300 is connected to the outside. Duct 300 extends to the outside and connects to a hood (not shown) attached to the exterior wall of the building, forming a ventilation airway for ventilating the air inside the building. When the ventilation fan 100 is in operation, the blower unit 2 drives indoor air into the housing 1a from the intake port 1f of the housing 1a, and the drawn-in air is exhausted to the outside through the intake port 1k, outlet port 1m, exhaust port 1g, duct connection port 3 and duct 300 of the fan casing 1b.

[0024] The power connection unit 5 shown in Figure 3 is provided on the blower body 1 and connects the motor 2a shown in Figure 1 to an external power supply (not shown). The power connection unit 5 is located inside the blower body 1. The power connection unit 5 is located outside the airflow path of the fan casing 1b at a corner portion of the blower body 1. The power connection unit 5 and the motor 2a are electrically connected by motor wires (not shown). The power connection unit 5 and the external power supply (not shown) are electrically connected by external power wires 9.

[0025] The external power cable 9 is routed through a bushing 10 from the top surface 1d or side surface 1e of the housing 1a into the housing that houses the power connection unit 5. The external power cable 9 is inserted into the connection part 5a of the power connection unit 5. The connection part 5a of the power connection unit 5 is a quick-connect terminal. By inserting the external power cable 9 into the connection part 5a, the external power cable 9 is connected to the power connection unit 5.

[0026] Power supplied from an external power source (not shown) is transmitted to the motor 2a shown in Figure 1 via the external power supply wire 9, the power connection part 5, and the motor wire (not shown). The electrical energy is converted into rotational motion of the motor 2a's shaft 2c, and this rotational motion of the motor 2a is transmitted to the fan 2b, causing the fan 2b to rotate. As the fan 2b rotates, an airflow is generated in the air passage formed by the fan casing 1b, moving from the intake port 1f to the exhaust port 1g.

[0027] As shown in Figures 2 and 3, the terminal cover 6 is provided on the fan body 1 so as to be openable and closable, and covers the power connection part 5 when closed. The terminal cover 6 is provided on the bottom surface 1j of the fan casing 1b. The terminal cover 6 can be opened and closed to a closed state that covers the power connection part 5 shown in Figure 2 and an open state that exposes the power connection part 5 shown in Figure 3. When the terminal cover 6 is closed as shown in Figure 2, the power connection part 5 is covered by the terminal cover 6 and isolated from the air passage, so that moisture, dust, etc. can be prevented from entering the power connection part 5 from the air passage. On the other hand, when the terminal cover 6 is open as shown in Figure 3, the power connection part 5 is exposed from the air intake port 1f on the bottom surface 1c of the housing 1a, so that the power connection part 5 can be accessed from the inside of the room, and the work of connecting the external power wire 9 to the power connection part 5 can be easily performed from the inside of the room.

[0028] As shown in Figure 2, the terminal cover 6 has a rotating shaft 6a. The fan casing 1b is provided with a support portion 10 that rotatably supports the rotating shaft 6a. The support portion 10 has a rotating hole (not shown) into which the rotating shaft 6a is inserted. The terminal cover 6 rotates around the rotating shaft 6a. The bottom surface 6b of the terminal cover 6 is provided with a finger hook portion 6c for the user to place their finger on. This makes it easy to open and close the terminal cover 6. The bottom surface 6b of the terminal cover 6 faces towards the room.

[0029] A protective wall 1p is provided on the bottom surface 1j of the fan casing 1b, surrounding the terminal cover 6. This improves the airtightness of the storage compartment that houses the power connection unit 5 when the terminal cover 6 is closed. The protective wall 1p is provided with a locking projection 1q that locks the terminal cover 6 in the closed position. This allows the terminal cover 6 to remain closed. The terminal cover 6 has a holding part 6d that holds the locking member 7 in a locked position as described later. Details of the holding part 6d will be described later.

[0030] The locking member 7 shown in Figure 4 is movably mounted on the blower body 1 and can both lock and allow the opening of the terminal cover 6. The locking member 7 is rotatably mounted on the blower body 1. The material of the locking member 7 is, for example, resin or metal. Preferably, the material of the locking member 7 is a resin that has both sliding properties and elasticity. An example of such a resin is polyacetal resin.

[0031] Figure 5 is a partially enlarged bottom view showing the locking member 7 and holding part 6d according to Embodiment 1, showing the locking member 7 in the unlocked position. Figure 6 is a cross-sectional view along the line VI-VI shown in Figure 5. Figure 7 is a partially enlarged bottom view showing the locking member 7 and holding part 6d according to Embodiment 1, showing the locking member 7 in the locked position. Figure 8 is a cross-sectional view along the line VIII-VIII shown in Figure 7. As shown in Figures 5 to 8, the blower body 1 has a hole 1r that opens to the outside of the blower body 1. The hole 1r is formed in the fan casing 1b. The hole 1r opens to the bottom surface 1j of the fan casing 1b. The locking member 7 is attached to the hole 1r. The shape of the hole 1r is, for example, circular. The shape of the hole 1r is not particularly limited as long as it is a shape that allows the locking member 7 to be attached to the hole 1r.

[0032] In Figures 6 and 8, the symbol C represents the central axis C of hole 1r. The locking member 7 rotates around the central axis C of hole 1r. Hereinafter, the direction parallel to the central axis C of hole 1r will be referred to as the axial direction, the direction perpendicular to the central axis C of hole 1r will be referred to as the orthogonal direction, and the direction of rotation of the locking member 7 around the central axis C of hole 1r will be referred to as the rotational direction. In the orthogonal direction, the direction toward the central axis C of hole 1r is referred to as inward, and the direction away from the central axis C of hole 1r is referred to as outward. In this embodiment, the axial direction is parallel to the vertical direction, but it changes depending on the orientation in which the ventilation fan 100 is installed.

[0033] Figure 9 is a perspective view showing the locking member 7 according to Embodiment 1. Figure 10 is a cross-sectional view along line XX shown in Figure 9. As shown in Figure 9, the locking member 7 has a head portion 7a, a leg portion 7b, and an arm portion 7c.

[0034] As shown in Figures 6 and 8, the head portion 7a is the part exposed to the outside of the blower body 1. As shown in Figures 9 and 10, the head portion 7a has a connecting portion 7d to which a tool (not shown) for rotating (moving) the locking member 7 can be connected. The connecting portion 7d is a hole into which a tool such as a screwdriver can be inserted. The configuration of the connecting portion 7d is changed as appropriate according to the tool used. By rotating the tool connected to the connecting portion 7d, the entire locking member 7, including the head portion 7a, can be rotated.

[0035] As shown in Figure 6, the leg portion 7b is the part connected to the head portion 7a and inserted into the hole 1r. The leg portion 7b extends axially from the head portion 7a toward the hole 1r. The leg portion 7b branches into multiple parts from the head portion 7a and is elastically deformable. In this embodiment, the leg portion 7b is branched into two, but it may branch into three or more parts, or it may be a single leg without branching. Each of the two leg portions 7b has a base portion 7e and a claw portion 7f. The base portion 7e extends axially from the head portion 7a toward the hole 1r. The claw portion 7f protrudes outward from the tip of the base portion 7e. The width along the orthogonal direction from the outer circumference of the base portion 7e of one leg portion 7b to the outer circumference of the base portion 7e of the other leg portion 7b is smaller than the diameter of the hole 1r. The width along the perpendicular direction from the outer circumference of the claw portion 7f of one leg portion 7b to the outer circumference of the claw portion 7f of the other leg portion 7b is smaller than the diameter of the hole 1r.

[0036] The leg portion 7b can be inserted into the hole 1r by elastically deforming inward in a perpendicular direction. When assembling the locking member 7 to the fan casing 1b, the leg portion 7b is inserted into the hole 1r from the outside to the inside of the fan casing 1b, with the claw portion 7f leading the way. At this time, when the claw portion 7f contacts the inner circumferential surface 1s of the hole 1r, the base portion 7e elastically deforms inward with respect to the boundary with the head portion 7a. Then, as the leg portion 7b is continued to be inserted into the hole 1r, the claw portion 7f moves past the back of the hole 1r, and the claw portion 7f catches on the back side of the bottom surface 1j of the fan casing 1b. At the same time, the base portion 7e elastically deforms outward with respect to the boundary with the head portion 7a, and the base portion 7e is pressed against the inner circumferential surface 1s of the hole 1r by the elastic restoring force. As a result, the locking member 7 is fixed to the fan casing 1b in a state where its movement in the axial and perpendicular directions is restricted. On the other hand, the locking member 7 is fixed to the fan casing 1b in a state where it is allowed to rotate in the rotational direction. This point will be described later.

[0037] It is preferable that the relationship 0° < θ < 90° holds when the angle θ between the inner circumferential surface 1s of the hole 1r and the contact portion 7g of the leg portion 7b that contacts the inner circumferential surface 1s of the hole 1r, and the central axis C of the hole 1r, is denoted as θ. As shown in Figure 9, the base portion 7e has an outwardly protruding rattle prevention rib 7h formed thereon. The contact portion 7g is part of the rattle prevention rib 7h. The rattle prevention rib 7h contacts the inner circumferential surface 1s of the hole 1r and plays a role in preventing rattle of the locking member 7. This makes it difficult for the leg portion 7b to come out of the hole 1r. The claw portion 7f protrudes outward more than the rattle prevention rib 7h.

[0038] As shown in Figure 8, the arm portion 7c is connected to the head portion 7a and is the part exposed to the outside of the blower body 1. As shown in Figure 9, the arm portion 7c extends perpendicularly from the head portion 7a. The arm portion 7c extends in a direction perpendicular to the extension direction of the leg portion 7b. The position of the locking member 7 can be changed between a locked position, where the arm portion 7c contacts the terminal cover 6 in its closed state to lock the opening operation of the terminal cover 6, as shown in Figure 7, and an unlocked position, where the arm portion 7c separates from the terminal cover 6 in its closed state to allow the terminal cover 6 to open, as shown in Figure 5. In other words, the position of the locking member 7 can be changed between the locked position and the unlocked position by rotating the locking member 7. Specifically, by rotating the locking member 7 in the unlocked position shown in Figure 5 by 90 degrees from one direction of rotation to the other (counterclockwise on the plane of the paper), the position of the locking member 7 can be changed to the locked position, as shown in Figure 7. On the other hand, by rotating the locking member 7, which is in the locked position shown in Figure 7, 90 degrees from one direction to the other (clockwise on the paper), the position of the locking member 7 can be changed to the unlocked position as shown in Figure 5.

[0039] Next, with reference to Figures 11 to 16, the details of the holding portion 6d will be described, as well as the relationship between the locking member 7 and the holding portion 6d. Figure 11 is a cross-sectional perspective view showing the locking member 7 and the holding portion 6d according to Embodiment 1, and shows the state in which the locking member 7 is in the locked position. Figure 12 is a bottom view showing the terminal cover 6 according to Embodiment 1. Figure 13 is a side view showing the terminal cover 6 according to Embodiment 1. Figure 14 is a schematic diagram showing the arm portion 7c and the holding portion 6d of the locking member 7 according to Embodiment 1, and shows the state in which the locking member 7 is in the locked position. Figure 15 is a schematic diagram showing the holding portion 6d according to Embodiment 1. Figure 16 is a schematic diagram showing the arm portion 7c of the locking member 7 according to Embodiment 1. In Figures 14 to 16, the vertical direction of the paper is the axial direction, and the horizontal direction of the paper is the rotational direction. Furthermore, in Figures 14 to 16, the direction from the right side of the paper to the left side is the direction from one rotational direction to the other, and the direction from the left side of the paper to the right side is the direction from the other rotational direction to the one rotational direction. In this embodiment, the rotational direction is the first direction.

[0040] As shown in Figures 11 to 13, the retaining portion 6d is formed on the bottom surface 6b, which is the outer surface of the terminal cover 6. The retaining portion 6d has a contact surface 6e, a first rib 6f, and a second rib 6g.

[0041] As shown in Figure 14, the contact surface 6e is formed on the bottom surface 6b of the terminal cover 6 and is the part that contacts the arm portion 7c in the locked position. The contact surface 6e is a plane perpendicular to the axial direction.

[0042] The first rib 6f is formed on one end of the contact surface 6e in the rotational direction and protrudes from the bottom surface 6b of the terminal cover 6 at a first height H2. In this embodiment, the cross-sectional shape of the first rib 6f along the axial direction is generally trapezoidal, but may be changed as appropriate. The first rib 6f has an inclined surface 6h, a tip surface 6i, and a first holding surface 6j.

[0043] The inclined surface 6h is tilted such that it moves away from the contact surface 6e in the axial direction as the arm rotates from one direction to the other. This makes it easier for the arm 7c to overcome the first rib 6f when it rotates from one direction to the other. In other words, the inclined surface 6h plays a role in guiding the arm 7c into the accommodating space 6p, which will be described later.

[0044] The tip surface 6i extends from the other end of the inclined surface 6h in the direction of rotation toward the other end in the direction of rotation. The tip surface 6i is a surface parallel to the contact surface 6e. The tip surface 6i is a second surface located at the tip of the first rib 6f.

[0045] The first retaining surface 6j is the surface that contacts the arm portion 7c in the locked position and holds the arm portion 7c. The first retaining surface 6j extends axially from the other end of the tip surface 6i in the direction of rotation toward the contact surface 6e. The first retaining surface 6j is a surface perpendicular to the contact surface 6e. The first retaining surface 6j is continuous with one end of the contact surface 6e in the direction of rotation.

[0046] The second rib 6g is formed at the other end of the contact surface 6e in the rotational direction and protrudes from the bottom surface 6b of the terminal cover 6 at a second height H3. In this embodiment, the cross-sectional shape of the second rib 6g along the axial direction is L-shaped, but may be changed as appropriate. The first rib 6f and the second rib 6g are arranged apart from each other in the rotational direction. The second rib 6g has a vertical wall portion 6k and a horizontal wall portion 6m.

[0047] The vertical wall portion 6k is a wall-like portion that protrudes axially from the bottom surface 6b of the terminal cover 6 toward the direction away from the contact surface 6e. The vertical wall portion 6k is formed continuously with the other end of the contact surface 6e in the direction of rotation. The vertical wall portion 6k and the first rib 6f are arranged apart from each other in the direction of rotation. The vertical wall portion 6k has a second retaining surface 6n. The second retaining surface 6n is a surface that contacts the arm portion 7c in the locked position and holds the arm portion 7c. The second retaining surface 6n extends axially from the other end of the contact surface 6e in the direction of rotation toward the direction away from the contact surface 6e. The second retaining surface 6n is a surface facing the first rib 6f. The second retaining surface 6n is a surface perpendicular to the contact surface 6e. The first retaining surface 6j and the second retaining surface 6n are arranged apart from each other in the direction of rotation. The arm portion 7c in the locked position is sandwiched between the first retaining surface 6j and the second retaining surface 6n.

[0048] The lateral wall portion 6m is a wall-like portion that protrudes in one direction in the rotational direction from the tip of the vertical wall portion 6k toward the first rib 6f. The lateral wall portion 6m does not reach the first rib 6f. The lateral wall portion 6m and the contact surface 6e are spaced apart from each other in the axial direction. The lateral wall portion 6m has a third retaining surface 6o. The third retaining surface 6o is the surface that contacts the arm portion 7c in the locked position and holds the arm portion 7c. The third retaining surface 6o extends toward the first rib 6f from the axial end of the second retaining surface 6n that is opposite to the contact surface 6e. The third retaining surface 6o is the first surface facing toward the contact surface 6e. The third retaining surface 6o is a surface parallel to the contact surface 6e. The third retaining surface 6o and the contact surface 6e are spaced apart from each other in the axial direction. The arm portion 7c in the locked position is sandwiched between the third retaining surface 6o and the contact surface 6e.

[0049] The retaining portion 6d has a housing space 6p formed by the contact surface 6e, the first retaining surface 6j, the second retaining surface 6n, and the third retaining surface 6o. The arm portion 7c in the locked position is housed in the housing space 6p. In the locked position, the arm portion 7c is held by being surrounded by the contact surface 6e, the first rib 6f, and the second rib 6g.

[0050] In this embodiment, the cross-sectional shape of the arm portion 7c is rectangular. The arm portion 7c has a first surface 7i, a second surface 7j, a third surface 7k, and a fourth surface 7m. The first surface 7i extends in the rotational direction. The second surface 7j extends in the rotational direction. The first surface 7i and the second surface 7j are spaced apart from each other in the axial direction. The third surface 7k connects one end of the first surface 7i and the second surface 7j in the rotational direction. The fourth surface 7m connects the other end of the first surface 7i and the second surface 7j in the rotational direction. The contact surface 6e contacts the first surface 7i. The first holding surface 6j contacts the portion of the third surface 7k that is close to the first surface 7i. The second holding surface 6n contacts the fourth surface 7m. The third retaining surface 6o contacts the portion of the second surface 7j that is closer to the fourth surface 7m.

[0051] As shown in Figure 15, an opening 6s is formed between one end 6q of the third holding surface 6o in the direction of rotation and the other end 6r of the tip surface 6i in the direction of rotation, through which the arm portion 7c can pass. The opening 6s is part of the accommodating space 6p. The one end 6q of the third holding surface 6o in the direction of rotation and the other end 6r of the tip surface 6i in the direction of rotation are offset from each other in the axial and rotational directions. Therefore, the imaginary straight line L connecting the one end 6q of the third holding surface 6o in the direction of rotation and the other end 6r of the tip surface 6i in the direction of rotation is oblique to the axial direction.

[0052] The height H4 of the opening 6s is defined as the height along the axial direction from the third holding surface 6o to the tip surface 6i shown in Figure 15. The shortest distance D of the opening 6s is defined as the shortest distance from one end 6q of the third holding surface 6o in the rotational direction to the other end 6r of the tip surface 6i of the first rib 6f in the rotational direction. Also, as shown in Figure 16, the height H1 of the arm portion 7c is defined as the height along the axial direction of the arm portion 7c. It is preferable that the height H4 of the opening 6s is less than or equal to the height H1 of the arm portion 7c. It is preferable that the shortest distance D is between 1.0 and 1.5 times the height H1 of the arm portion 7c. That is, it is preferable that the relationship H4 ≤ H1 ≤ D holds.

[0053] As shown in Figure 15, the storage space 6p has dimensions with a width W2 in the rotational direction and a height H5 along the axial direction. As shown in Figure 16, the arm portion 7c has dimensions with a width W1 in the rotational direction and a height H1 along the axial direction. It is preferable that the size of the arm portion 7c is the same as the size of the storage space 6p. That is, it is preferable that the relationships W1=W2 and H1=H5 hold true.

[0054] As shown in Figures 15 and 16, the heights H1, H2, and H3 of the arm portion 7c are as follows:

[0055] Here, the actions of the locking member 7, the first rib 6f, and the second rib 6g will be explained in detail. As shown in Figures 15 and 16, when the position of the locking member 7 is changed from the unlocked position to the locked position, the arm 7c rotates from one direction of rotation to the other (from the right side of the paper to the left side). At this time, the arm 7c moves into the storage space 6p, overcoming the first rib 6f from one side of the rotation (the right side of the paper). On the other hand, when the position of the arm 7c is changed from the locked position to the unlocked position, the arm 7c moves from one direction of rotation to the other (from the left side of the paper to the right side). At this time, the arm 7c moves out of the storage space 6p, overcoming the first rib 6f from the other side of the rotation (the left side of the paper).

[0056] ​The first rib 6f restricts the rotation of the locking member 7 from the locked position to the unlocked position without the use of a tool, but allows the rotation of the locking member 7 from the locked position to the unlocked position with the use of a tool. Specifically, when the locking member 7 is in the locked position, the first retaining surface 6j contacts the arm portion 7c from one direction in the rotational direction. When the position of the locking member 7 is changed from the locked position to the unlocked position, the first retaining surface 6j, which is perpendicular to the contact surface 6e, contacts the arm portion 7c before the other parts, making it more difficult for the arm portion 7c to overcome the first rib 6f compared to when the position of the locking member 7 is changed from the unlocked position to the locked position. As a result, without the use of a tool, the arm portion 7c cannot overcome the first rib 6f, restricting the rotation of the locking member 7 to the unlocked position, but by rotating the locking member 7 with a tool, the arm portion 7c can overcome the first rib 6f, allowing the rotation of the locking member 7 to the unlocked position. In other words, when the locking member 7 is in the locked position, it is not possible to rotate the locking member 7 to the unlocked position without using a tool, and the terminal cover 6 cannot be opened.

[0057] On the other hand, the first rib 6f allows the locking member 7 to be rotated from the unlocked position to the locked position using a tool or by fingers. Specifically, when the position of the locking member 7 is changed from the unlocked position to the locked position, the inclined surface 6h and the tip surface 6i contact the arm portion 7c from the other direction of rotation. When the position of the locking member 7 is changed from the unlocked position to the locked position, the inclined surface 6h, which is inclined to be located away from the contact surface 6e in the axial direction as one direction of rotation moves from one to the other, contacts the arm portion 7c before the other parts, making it easier for the arm portion 7c to overcome the first rib 6f. As a result, the locking member 7 can be rotated by fingers without the use of a tool, and the arm portion 7c can overcome the first rib 6f, allowing the locking member 7 to rotate to the locked position.

[0058] As shown in Figure 14, the second rib 6g restricts the rotation of the locking member 7 from the locked position to the unlocked position without the use of tools, but allows the rotation of the locking member 7 from the locked position to the unlocked position with the use of tools. Specifically, when the locking member 7 is in the locked position, the second retaining surface 6n contacts the arm portion 7c from the other side of the rotational direction, making it difficult for fingers to get between the second retaining surface 6n and the arm portion 7c. Also, when the locking member 7 is in the locked position, the third retaining surface 6o covers the arm portion 7c from the opposite side of the contact surface 6e, making it difficult for fingers to get between the second retaining surface 6n and the arm portion 7c. As a result, it is difficult to apply a load to the locking member 7 to rotate it from one side of the rotational direction to the other without the use of tools, and it is also difficult to pinch and rotate the locking member 7 with your fingers. Therefore, without the use of a tool, the rotation of the locking member 7 to the unlocked position is restricted. However, by using a tool to rotate the locking member 7, the arm portion 7c can overcome the first rib 6f, allowing the locking member 7 to rotate to the unlocked position. In other words, when the locking member 7 is in the locked position, it cannot be rotated to the unlocked position without the use of a tool, and the terminal cover 6 cannot be opened. The second rib 6g allows the locking member 7 to rotate from the unlocked position to the locked position using a tool or by finger.

[0059] Next, the configuration of the bottom surface 1j of the fan casing 1b will be described in detail with reference to Figures 1, 2, 5, and 7.

[0060] As shown in Figures 5 and 7, a third rib 1t is formed on the bottom surface 1j of the fan casing 1b. The third rib 1t is positioned around the hole 1r. The third rib 1t is positioned on the other side of the rotational direction (counterclockwise in the plane of the paper) than the second rib 6g. The third rib 1t is positioned adjacent to the second rib 6g. The shape of the third rib 1t when viewed along the axial direction is generally L-shaped. The third rib 1t has an arc-shaped portion 1u and a stopper portion 1v. The arc-shaped portion 1u is an arc-shaped part that follows the direction of rotation. The stopper portion 1v is the part of the arc-shaped portion 1u that extends from the end closer to the second rib 6g toward one side of the rotational direction (clockwise in the plane of the paper). The stopper portion 1v is positioned adjacent to the second rib 6g.

[0061] The third rib 1t restricts the rotation of the locking member 7 from the locked position to the unlocked position without the use of tools, but allows the rotation of the locking member 7 from the locked position to the unlocked position with the use of tools. Specifically, when the locking member 7 is in the locked position, the third rib 1t either contacts the head 7a from the other direction of rotation, or is positioned on the other side of the rotation with a gap between the third rib 1t and the head 7a that is too small for a finger to fit between them, making it difficult for a finger to fit between the third rib 1t and the head 7a. As a result, it is difficult to apply a load to the locking member 7 to rotate it from one direction to the other without the use of tools, and it is also difficult to pinch and rotate the locking member 7 with fingers. Therefore, the rotation of the locking member 7 to the unlocked position is restricted without the use of tools, but by rotating the locking member 7 with tools, the arm portion 7c can overcome the first rib 6f, allowing the locking member 7 to rotate to the unlocked position. In other words, when the locking member 7 is in the locked position, it cannot be rotated to the unlocked position without using a tool, and the terminal cover 6 cannot be opened. The third rib 1t allows the locking member 7 to be rotated from the unlocked position to the locked position using a tool or by finger. The blower 200 preferably has all of the first rib 6f, the second rib 6g and the third rib 1t, but it is sufficient if it has at least the first rib 6f and the second rib 6g.

[0062] As shown in Figure 7, a fourth rib 1w is formed on the bottom surface 1j of the fan casing 1b. The fourth rib 1w is positioned around the hole 1r. The fourth rib 1w is positioned on the opposite side of the hole 1r from the third rib 1t in the orthogonal direction. The fourth rib 1w plays a role in preventing damage or deformation of the locking member 7 caused by the tip of the spring 4a shown in Figure 1 catching on the locking member 7. In other words, when the spring 4a of the decorative grille 4 shown in Figure 1 is hooked onto the spring fixing part 1n attached to the fan casing 1b shown in Figure 2, the fourth rib 1w shown in Figure 2 prevents the tip of the spring 4a from catching on the locking member 7, thereby preventing damage or deformation of the locking member 7.

[0063] Next, the effects of the blower 200 according to this embodiment will be described.

[0064] In this embodiment, as shown in Figures 2 and 3, the blower 200 includes a terminal cover 6 that is openably and closably provided on the blower body 1 and covers the power connection part 5 when closed, and a locking member 7 that is movably provided on the blower body 1 and can lock the opening operation of the terminal cover 6 while also allowing the opening operation of the terminal cover 6. Furthermore, as shown in Figures 6 and 8, the locking member 7 has a head portion 7a that is exposed to the outside of the blower body 1 and has a connecting portion 7d to which a tool can be connected, a leg portion 7b that is connected to the head portion 7a and inserted into a hole 1r, and an arm portion 7c that is connected to the head portion 7a and exposed to the outside of the blower body 1. Furthermore, as shown in Figures 5 and 7, the position of the locking member 7 can be changed between a locked position in which the arm portion 7c contacts the terminal cover 6 in the closed state and locks the opening operation of the terminal cover 6, and an unlocked position in which the arm portion 7c moves away from the terminal cover 6 in the closed state and allows the opening operation of the terminal cover 6. With this configuration, the position of the locking member 7 can be changed between the locked position and the unlocked position using a tool connected to the connecting part 7d. When the position of the locking member 7 is changed to the locked position shown in Figure 7, the opening operation of the terminal cover 6 is locked. In this state, the terminal cover 6 cannot be opened without the use of a tool, thus preventing the user from accidentally touching the power connection part 5.

[0065] In this embodiment, by shipping the locking member 7 in the unlocked position shown in Figure 5, the terminal cover 6 can be easily opened without using tools when connecting the external power supply wire 9 shown in Figure 3 to the power connection part 5. Furthermore, after the connection work is completed, the position of the locking member 7 can be changed from the unlocked position shown in Figure 5 to the locked position shown in Figure 7 by hand without using tools, so the terminal cover 6 can be closed and the opening operation of the terminal cover 6 can be locked without using tools. This improves work efficiency during installation and maintenance. In this embodiment, since it is not necessary to remove and install the locking member 7 each time the terminal cover 6 is opened and closed, work efficiency during installation and maintenance is improved, and the loss of parts during installation and maintenance is prevented. Therefore, in this embodiment, a blower 200 is obtained that has a structure in which the terminal cover 6 cannot be opened without using tools, while improving work efficiency during installation and maintenance and preventing the loss of parts.

[0066] In this embodiment, as shown in Figures 5 and 7, the locking member 7 is rotatably mounted on the blower body 1, and the position of the locking member 7 can be changed between a locked position and an unlocked position by rotating the locking member 7. With this configuration, the position of the locking member 7 can be easily changed between a locked position and an unlocked position simply by rotating the locking member 7.

[0067] In this embodiment, as shown in Figure 6, the leg portion 7b branches out from the head portion 7a and is elastically deformable. With this configuration, the leg portion 7b elastically deforms to match the shape of the inner circumferential surface 1s of the hole 1r, and the locking member 7 can be fixed to the hole 1r of the fan casing 1b using the elastic force of the leg portion 7b.

[0068] In this embodiment, as shown in Figure 6, when the angle between the contact portion 7g of the leg portion 7b that contacts the inner circumferential surface 1s of the hole 1r and the central axis C of the hole 1r is θ, the relationship 0° < θ < 90° holds. With this configuration, even if the contact area between the inner circumferential surface 1s of the hole 1r and the contact portion 7g of the leg portion 7b is small, the leg portion 7b is less likely to come out of the hole 1r.

[0069] In this embodiment, the material of the locking member 7 shown in Figure 6 is a resin that possesses both sliding properties and elasticity. This configuration makes it easier to rotate the locking member 7 relative to the hole 1r and also makes it easier to fix the locking member 7 in the hole 1r.

[0070] In this embodiment, as shown in Figure 14, the terminal cover 6 has a holding portion 6d that holds the locking member 7 in the locked position. The holding portion 6d has a contact surface 6e formed on the bottom surface 6b of the terminal cover 6 that contacts the arm portion 7c in the locked position, a first rib 6f formed on one end of the contact surface 6e in the rotational direction and protruding from the bottom surface 6b of the terminal cover 6 at a first height H2, and a second rib 6g formed on the other end of the contact surface 6e in the rotational direction and protruding from the bottom surface 6b of the terminal cover 6 at a second height H3. With these configurations, the arm portion 7c can be held by the holding portion 6d, and thus the locked position of the locking member 7 can be maintained.

[0071] In this embodiment, as shown in Figure 14, when the position of the locking member 7 is changed from the unlocked position to the locked position, the arm portion 7c rotates over the first rib 6f from one direction of rotation to the other, and when the position of the locking member 7 is changed from the locked position to the unlocked position, the arm portion 7c rotates over the first rib 6f from the other direction of rotation to the one. When the height of the arm portion 7c is H1, the first height is H2, and the second height is H3, H2

[0072] ​In this embodiment, as shown in Figure 14, the second rib 6g has a vertical wall portion 6k that protrudes from the bottom surface 6b of the terminal cover 6 at a second height H3, and a horizontal wall portion 6m that protrudes from the tip of the vertical wall portion 6k toward the first rib 6f in one direction in the rotational direction. The horizontal wall portion 6m has a third retaining surface 6o that faces toward the contact surface 6e. The first rib 6f has a tip surface 6i located at the tip of the first rib 6f. An opening 6s is formed between one end 6q of the third retaining surface 6o in the rotational direction and the other end 6r of the tip surface 6i in the rotational direction, through which the arm portion 7c can pass. The height H4 of the opening 6s is less than or equal to the height H1 of the arm portion 7c. The shortest distance D from one end 6q of the third retaining surface 6o in the rotational direction to the other end 6r of the tip surface 6i in the rotational direction is 1.0 times or more and 1.5 times or less the height H1 of the arm portion 7c. With these configurations, when changing the position of the locking member 7 from the locked position to the unlocked position, the arm portion 7c passes over the first rib 6f and through the opening 6s, and the arm portion 7c is held by the holding portion 6d Remove from It is possible.

[0073] Next, a modified example of Embodiment 1 will be described.

[0074] In this embodiment, the power connection unit 5 shown in Figure 3 is located inside the blower body 1, but it may also be located outside the blower body 1. The power connection unit 5 may be located, for example, above the top surface 1d of the housing 1a shown in Figure 1. This protects the power connection unit 5 from the temperature rise inside the blower body 1 caused by the motor 2a's operation. When the power connection unit 5 is located outside the blower body 1, the terminal cover 6 and the locking member 7 are fixed to the top surface 1d of the housing 1a, and the hole 1r is formed in the housing 1a.

[0075] In this embodiment, the blower 200 according to the Disclosure is applied to a ventilation fan 100 installed on the ceiling 12 shown in Figure 1, but the Disclosure is not limited thereto. The blower 200 according to the Disclosure may be applied to a ventilation fan mounted on a wall or floor. Furthermore, the blower 200 according to the Disclosure may be applied to other devices such as a circulator or an air conditioner.

[0076] In this embodiment, the cross-sectional shape of the second rib 6g along the axial direction was L-shaped, but it may be rectangular, for example. That is, the second rib 6g may have a configuration that consists only of a vertical wall portion 6k.

[0077] The configurations shown in the above embodiments are merely examples, and can be combined with other known technologies. It is also possible to omit or modify parts of the configuration without departing from the gist of the invention.

[0078] The various aspects of this disclosure are summarized below as an appendix.

[0079] (Note 1) A blower body having a fan casing that forms an air passage, and having an intake port for drawing in indoor air and an exhaust port for exhausting the drawn-in air, The fan casing has a fan that is installed inside the fan casing and rotates by the drive of a motor, and the blowing unit generates an airflow that flows into the blower body from the intake port and out from the exhaust port, The blower body is provided with a power connection section that connects the motor and an external power supply, A terminal cover is provided on the blower body so as to be openable and closable, and when closed, it covers the power connection part. A locking member is provided movably on the blower body and is capable of locking the opening operation of the terminal cover and also allowing the opening operation of the terminal cover, Equipped with, The blower body has a hole that opens to the outside of the blower body. The locking member is A connecting portion is formed to which a tool can be attached, and a head is exposed to the outside of the blower body, A leg portion connected to the head and inserted into the hole, An arm portion connected to the head and exposed to the outside of the blower body, It has, The blower is characterized in that the position of the locking member can be changed between a locking position in which the arm contacts the closed terminal cover to lock the opening operation of the terminal cover, and an unlocking position in which the arm separates from the closed terminal cover to allow the opening operation of the terminal cover. (Note 2) The locking member is rotatably mounted on the blower body, The blower according to Appendix 1, characterized in that the position of the locking member can be changed between the locked position and the unlocked position by rotating the locking member. (Note 3) The blower according to Appendix 1 or 2, characterized in that the legs branch out from the head and are elastically deformable. (Note 4) A blower according to any one of the appendices 1 to 3, characterized in that when the angle between the contact portion of the leg that contacts the inner circumferential surface of the hole and the central axis of the hole is θ, the relationship 0° < θ < 90° holds. (Note 5) The blower according to any one of the appendices 1 to 4, characterized in that the material of the locking member is a resin having both sliding properties and elasticity. (Note 6) The terminal cover has a holding portion that holds the locking member in the locked position, The aforementioned retaining part is A contact surface formed on the outer surface of the terminal cover that contacts the arm in the locked position, A first rib is formed on one end of the contact surface in the first direction and protrudes from the outer surface of the terminal cover at a first height, A second rib is formed on the other end of the contact surface in the first direction and protrudes from the outer surface of the terminal cover at a second height, It has, When the position of the locking member is changed from the unlocked position to the locked position, the arm moves over the first rib and moves from one direction to the other in the first direction. When the position of the locking member is changed from the locked position to the unlocked position, the arm moves over the first rib and moves from one direction to the other in the first direction. When the height of the arm is H1, the first height is H2, and the second height is H3, H2 (Note 7) The second rib described above is A vertical wall portion that protrudes from the outer surface of the terminal cover at the second height, A horizontal wall portion projecting from the tip of the vertical wall portion toward the first rib in one of the first directions, It has, The aforementioned side wall portion has a first surface facing the contact surface, The first rib has a second surface located at the tip of the first rib, An opening is formed between one end of the first surface in the first direction and the other end of the second surface in the first direction, through which the arm can pass. The height of the opening is less than or equal to the height of the arm. The blower according to Appendix 6, characterized in that the shortest distance from one end of the first surface in the first direction to the other end of the second surface in the first direction is 1.0 times or more and 1.5 times or less the height of the arm. [Explanation of symbols]

[0080] ​1 Blower body, 1a Housing, 1b Fan casing, 1c, 1j, 6b Bottom surface, 1d Top surface, 1e Side surface, 1f Intake port, 1g Exhaust port, 1h Flange part, 1i Screw hole, 1k Intake port, 1m Outlet port, 1n Spring fixing part, 1o Support part, 1p Protective wall, 1q Locking projection, 1r Hole, 1s Inner circumferential surface, 1t Third rib, 1u Arc-shaped part, 1v Stopper part, 1w Fourth rib, 2 Blower section, 2a Motor, 2b Fan, 2c Shaft, 3 Duct connection port, 4 Decorative grille, 4a Spring, 4b Spring fixing part, 5 Power connection section, 5a Wiring section, 6 Terminal cover, 6a Rotating shaft, 6c Finger hook part, 6d Holding part, 6e Contact surface, 6f First rib, 6g 6h Second rib, 6h Inclined surface, 6i Tip surface, 6j First retaining surface, 6k Vertical wall section, 6m Horizontal wall section, 6n Second retaining surface, 6o Third retaining surface, 6p Accommodation space, 6q One ​​end, 6r Other end, 6s Opening, 7 Locking member, 7a Head, 7b Leg section, 7c Arm section, 7d Connecting section, 7e Base, 7f Claw section, 7g Contact section, 7h Anti-rattle rib, 7i First surface, 7j Second surface, 7k Third surface, 7m Fourth surface, 8 Shutter, 9 External power wire, 10 Bushing, 11 Screw, 12 Ceiling, 12a Installation hole, 13 Ceiling space, 100 Ventilation fan, 200 Blower, 300 Duct.

Claims

1. A blower body having a fan casing that forms an air passage, and having an intake port for drawing in indoor air and an exhaust port for exhausting the drawn-in air, The fan casing has a fan that is installed inside the fan casing and rotates by the drive of a motor, and the blowing unit generates an airflow that flows into the blower body from the intake port and out from the exhaust port, The blower body is provided with a power connection section that connects the motor and an external power supply, A terminal cover is provided on the blower body so as to be openable and closable, and when closed, it covers the power connection part. A locking member is provided movably on the blower body and is capable of locking the opening operation of the terminal cover and also allowing the opening operation of the terminal cover, Equipped with, The blower body has a hole that opens to the outside of the blower body. The aforementioned hole is provided on the outside of the area covered by the terminal cover when the terminal cover is closed. The locking member is attached to the aforementioned hole. The locking member is A connecting portion is formed to which a tool can be attached, and a head is exposed to the outside of the blower body, A leg portion connected to the head and inserted into the hole, An arm portion connected to the head and exposed to the outside of the blower body, It has, The position of the locking member can be changed between a locking position in which the arm contacts the closed terminal cover to lock the opening operation of the terminal cover, and an unlocking position in which the arm separates from the closed terminal cover to allow the opening operation of the terminal cover. The terminal cover has a holding portion that holds the locking member in the locked position, The aforementioned retaining part is A contact surface formed on the outer surface of the terminal cover that contacts the arm in the locked position, A first rib is formed on one end of the contact surface in the first direction and protrudes from the outer surface of the terminal cover at a first height, A second rib is formed on the other end of the contact surface in the first direction and protrudes from the outer surface of the terminal cover at a second height, It has, When the position of the locking member is changed from the unlocked position to the locked position, the arm moves over the first rib from one direction to the other in the first direction. When the position of the locking member is changed from the locked position to the unlocked position, the arm moves over the first rib and moves from the other direction toward the first direction. When the height of the arm is H1, the first height is H2, and the second height is H3, the relationship H2 < H1 < H3 holds true. The second rib described above is A vertical wall portion that protrudes from the outer surface of the terminal cover at the second height, A horizontal wall portion projecting from the tip of the vertical wall portion toward the first rib in one of the first directions, It has, The aforementioned side wall portion has a first surface facing the contact surface, The first rib has a second surface located at the tip of the first rib, An opening is formed between one end of the first surface in the first direction and the other end of the second surface in the first direction, through which the arm can pass. The height of the opening is less than or equal to the height of the arm. A blower characterized in that the shortest distance from one end of the first surface in the first direction to the other end of the second surface in the first direction is 1.0 times or more and 1.5 times or less the height of the arm.

2. The locking member is rotatably mounted on the blower body, The blower according to claim 1, characterized in that the position of the locking member can be changed between the locked position and the unlocked position by rotating the locking member.

3. The blower according to claim 1, characterized in that the leg portion branches out from the head portion in multiple ways and is elastically deformable.

4. The blower according to claim 1, characterized in that when the angle between the contact portion of the leg that contacts the inner circumferential surface of the hole and the central axis of the hole is θ, the relationship 0° < θ < 90° holds.

5. The blower according to claim 1, characterized in that the material of the locking member is a resin having both sliding properties and elasticity.

6. A blower body having a fan casing that forms an air passage, and having an intake port for drawing in indoor air and an exhaust port for exhausting the drawn-in air, The fan casing has a fan that is installed inside the fan casing and rotates by the drive of a motor, and the blowing unit generates an airflow that flows into the blower body from the intake port and out from the exhaust port, The blower body is provided with a power connection section that connects the motor and an external power supply, A terminal cover is provided on the blower body so as to be openable and closable, and when closed, it covers the power connection part. A locking member is provided movably on the blower body and is capable of locking the opening operation of the terminal cover and also allowing the opening operation of the terminal cover, Equipped with, The blower body has a hole that opens to the outside of the blower body. The locking member is A connecting portion is formed to which a tool can be attached, and a head is exposed to the outside of the blower body, A leg portion connected to the head and inserted into the hole, An arm portion connected to the head and exposed to the outside of the blower body, It has, The position of the locking member can be changed between a locking position in which the arm contacts the closed terminal cover to lock the opening operation of the terminal cover, and an unlocking position in which the arm separates from the closed terminal cover to allow the opening operation of the terminal cover. The terminal cover has a holding portion that holds the locking member in the locked position, The aforementioned retaining part is A contact surface formed on the outer surface of the terminal cover that contacts the arm in the locked position, A first rib is formed on one end of the contact surface in the first direction and protrudes from the outer surface of the terminal cover at a first height, A second rib is formed on the other end of the contact surface in the first direction and protrudes from the outer surface of the terminal cover at a second height, It has, When the position of the locking member is changed from the unlocked position to the locked position, the arm moves over the first rib from one direction to the other in the first direction. When the position of the locking member is changed from the locked position to the unlocked position, the arm moves over the first rib and moves from the other direction toward the first direction. When the height of the arm is H1, the first height is H2, and the second height is H3, the relationship H2 < H1 < H3 holds true. The second rib described above is A vertical wall portion that protrudes from the outer surface of the terminal cover at the second height, A horizontal wall portion projecting from the tip of the vertical wall portion toward the first rib in one of the first directions, It has, The aforementioned side wall portion has a first surface facing the contact surface, The first rib has a second surface located at the tip of the first rib, An opening is formed between one end of the first surface in the first direction and the other end of the second surface in the first direction, through which the arm can pass. The height of the opening is less than or equal to the height of the arm. A blower characterized in that the shortest distance from one end of the first surface in the first direction to the other end of the second surface in the first direction is 1.0 times or more and 1.5 times or less the height of the arm.

Images