Air 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 equipped with a terminal cover that covers a power connection portion. [Background technology]

[0002] Conventionally, there is known a blower that is installed on the ceiling, wall or floor of a building and generates an airflow by rotating a fan driven by 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 is provided with a power supply connection part that connects the motor to the external power source.

[0003] The blower also includes a terminal cover that can be opened and closed and covers the power connection part when closed to protect the power connection part from moisture, dust, etc. For example, Patent Document 1 discloses a blower in which a power connection part is installed inside a cylindrical protective frame and a terminal cover is provided to cover the opening of the protective frame and the power connection part.

[0004] Due to recent amendments to the "Interpretation of the Ministerial Ordinance Prescribing Technical Standards for Electrical Appliances" related to the Electrical Appliance and Material Safety Act, fans that supply power to the motor from an external power source must be designed so that the power connection cannot be accessed without the user using a tool such as a screwdriver, to prevent the user from accidentally touching the power connection. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4566665 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology disclosed in Patent Document 1 is structured so that the user can open the terminal cover and access the power connection without using tools. In other words, the technology disclosed in Patent Document 1 is not structured in accordance with the revised "Interpretation of the Ministerial Ordinance Prescribing Technical Standards for Electrical Appliances" related to the Electrical Appliance and Material Safety Act.

[0007] One possible method for achieving such a structure is to fix the terminal cover to the housing of the blower with screws. However, with this method, when opening the terminal cover for installation or maintenance work, it is necessary to remove the screws from the terminal cover and the housing, open the terminal cover, perform the work, and then close the terminal cover after the work is completed and fix it to the housing again with the screws. Since it is necessary to remove and install the screws every time the terminal cover is opened and closed, the workability during installation and maintenance work is poor and there is a possibility that the removed screws will be lost during the work.

[0008] The present disclosure has been made in consideration of the above, and aims to obtain a blower that has a structure in which the terminal cover cannot be opened without the use of tools, while improving workability during installation and maintenance work and preventing loss of parts. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems and achieve the object, the blower according to the present disclosure includes a blower body, a blowing unit, a power supply connection unit, a terminal cover, and a locking member. The blower body has a fan casing that forms an air passage. The blower body is formed with an intake port for drawing in indoor air and an exhaust port for exhausting the drawn air. The blowing unit has a fan that is installed inside the fan casing and rotates by driving a motor. The blowing unit generates an airflow that flows from the intake port into the inside of the blower body and flows out from the exhaust port. The power supply connection unit 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 supply connection unit in a closed state. The locking member is provided movably on the blower body, and is capable of locking the opening operation of the terminal cover and allowing the opening operation of the terminal cover. The blower body is formed with a hole that opens to the outside of the blower body. The locking member has a head, legs, and arms. The head is formed with a connecting portion to which a tool can be connected. The head is exposed to the outside of the blower body. The legs are connected to the head and inserted into the holes. The arms are connected to the head and exposed to the outside of the blower body. The position of the locking member is changeable between a locked position where the arms come into contact with the terminal cover in a closed state to lock the opening operation of the terminal cover, and an unlocked position where the arms separate from the terminal cover in a closed state to allow the opening operation of the terminal cover. Effect of the Invention

[0010] According to the present disclosure, it is possible to achieve an advantageous effect of improving workability during installation and maintenance work and preventing loss of parts while providing a structure in which the terminal cover cannot be opened without the use of tools. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional view showing an installation state of a ventilation fan including a blower according to a first embodiment; [Diagram 2] FIG. 1 is a bottom view of a ventilation fan including a blower according to a first embodiment, showing a state in which a decorative grill is not attached and a terminal cover is closed. [Diagram 3] FIG. 1 is a bottom view of a ventilation fan including a blower according to a first embodiment, showing a state in which a decorative grill is not attached and a terminal cover is open. [Figure 4] FIG. 1 is an exploded perspective view showing a ventilation fan including a blower according to a first embodiment, in a state where a decorative grill is not attached and a terminal cover is closed. [Diagram 5] FIG. 1 is a partially enlarged bottom view showing the locking member and the holding portion according to the first embodiment, in which the locking member is in an unlocked position; [Figure 6] 6 is a cross-sectional view taken along line VI-VI shown in FIG. [Figure 7] FIG. 1 is a partially enlarged bottom view showing the locking member and the holding portion according to the first embodiment, illustrating a state in which the locking member is in a locked position. [Figure 8] 8 is a cross-sectional view taken along line VIII-VIII shown in FIG. 7. [Figure 9] FIG. 1 is a perspective view showing a locking member according to a first embodiment; [Figure 10] 10 is a cross-sectional view taken along line XX shown in FIG. [Figure 11] FIG. 1 is a cross-sectional perspective view showing a locking member and a holding portion according to the first embodiment, in which the locking member is in a locked position; [Figure 12] FIG. 1 is a bottom view showing a terminal cover according to a first embodiment; [Figure 13] FIG. 1 is a side view showing a terminal cover according to a first embodiment; [Figure 14] FIG. 1 is a schematic diagram of an arm portion and a holding portion of a locking member according to a first embodiment, showing a state in which the locking member is in a locked position; [Figure 15] FIG. 1 is a schematic diagram showing a holding unit according to a first embodiment; [Figure 16] FIG. 1 is a schematic diagram showing an arm portion of a locking member according to a first embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a blower according to an embodiment will be described in detail with reference to the drawings.

[0013] Embodiment 1 FIG. 1 is a cross-sectional view showing an installation state of a ventilation fan 100 including a blower 200 according to the first embodiment. FIG. 2 is a bottom view showing the ventilation fan 100 including the blower 200 according to the first embodiment, showing a state in which 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 the first embodiment, showing a state in which the decorative grill 4 is not attached and the terminal cover 6 is open. FIG. 4 is an exploded perspective view showing the ventilation fan 100 including the blower 200 according to the first embodiment, showing a state in which the decorative grill 4 is not attached and the terminal cover 6 is closed. As shown in FIG. 1, the ventilation fan 100 includes the blower 200 and a duct 300. The ventilation fan 100 draws in indoor air by the operation of the blower 200 and exhausts the air to the outside through the duct 300. The blower 200 includes a blower body 1, a blowing section 2, a duct connection port 3, and a decorative grill 4. The blower 200 also includes a power connection section 5, a terminal cover 6, and a locking member 7, as shown in Figs. 2 and 3 .

[0014] As shown in FIG. 1, ceiling 12 has an installation hole 12a formed therein, which connects the room with attic 13. In FIG. 1, the upper side of ceiling 12 on the page is attic 13, and the lower side of ceiling 12 on the page is the room. Ventilation fan 100 is installed in ceiling 12 using installation hole 12a formed in ceiling 12. Attic 13 is formed above ceiling 12. Ventilation fan 100 is installed from installation hole 12a to attic 13. Attic 13 is a space formed between ceiling 12 and an upper structure (not shown). The upper structure 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 that is disposed inside the housing 1a and forms an air passage for a fan 2b.

[0016] The housing 1a is formed with an intake port 1f for drawing in indoor air and an exhaust port 1g for exhausting the drawn-in air. The intake port 1f is formed on the bottom surface 1c of the housing 1a. The bottom surface 1c of the housing 1a faces the room. The intake port 1f draws in indoor air located directly below the ventilation fan 100. A flange portion 1h is formed on the periphery of the intake port 1f on the bottom surface 1c, extending horizontally in a direction away from the center of the intake port 1f. The flange portion 1h is formed with a screw hole 1i shown in FIG. 2. 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 side surfaces 1e of the housing 1a.

[0017] A suction port 1k is formed on the bottom surface 1j of the fan casing 1b, which draws in air that has flowed into the inside of the housing 1a from the intake port 1f. The bottom surface 1j of the fan casing 1b faces the room. One side surface of the fan casing 1b is formed with an outlet port 1m, which allows air inside the fan casing 1b to flow out toward the exhaust port 1g. The fan casing 1b is fixed to the housing 1a with 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 disposed inside the blower body 1 and generates an airflow that flows into the inside of the blower body 1 from the intake port 1f and flows out from the exhaust port 1g. The blower unit 2 has a motor 2a and a fan 2b.

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

[0020] The decorative grill 4 is disposed on the surface of the ceiling 12 facing the room so as to cover the installation hole 12a from the inside of the room. The decorative grill 4 covers the bottom surface 1c of the housing 1a. The decorative grill 4 is a design component for hiding internal components such as the fan casing 1b from view from the inside of the room. This ensures that the appearance of the ventilator fan 100 is not marred when viewed from the inside of the room. The decorative grill 4 has a spring 4a. The spring 4a is attached to the decorative grill 4 by a spring fixing component 4b. The decorative grill 4 is fixed to the fan casing 1b by hooking the spring 4a onto a spring fixing part 1n attached to the fan casing 1b.

[0021] The duct connection port 3 is a member that is detachably attached to the side surface 1e of the housing 1a so as to communicate with the exhaust port 1g, and to which the duct 300 is connected. 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 serves to extend the position at which air is exhausted from the housing 1a to a position at which the duct 300 communicates. The outer shape of the duct connection port 3 is stepped, having portions with different diameters. Since the outer shape of the duct connection port 3 is stepped, having portions with different diameters, it is possible to connect one duct 300 selected from a plurality of ducts 300 with different inner diameters to the duct connection port 3, and the work of winding tape to fix the duct 300 to the duct connection port 3 is facilitated.

[0022] A shutter 8 that opens and closes due to wind pressure is installed inside the duct connection port 3. The shutter 8 opens due to wind pressure when the ventilation fan 100 is operating, and closes the inside of the duct connection port 3 due to 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] The duct 300 is connected to the outside of the room. The duct 300 extends to the outside of the room and is connected to a hood (not shown) attached to the outer wall of the building to form a ventilation air passage for ventilating the air inside the building. When the ventilation fan 100 is in operation, the air inside the room is sucked into the housing 1a through the air intake 1f of the housing 1a by driving the blower unit 2, and the sucked air is exhausted to the outside through the air intake 1k, the air outlet 1m, the air exhaust 1g, the duct connection port 3, and the duct 300 of the fan casing 1b.

[0024] The power supply connection part 5 shown in Fig. 3 is provided on the blower body 1 and connects the motor 2a shown in Fig. 1 to an external power supply (not shown). The power supply connection part 5 is disposed inside the blower body 1. The power supply connection part 5 is disposed outside the air passage of the fan casing 1b at a corner part of the blower body 1. The power supply connection part 5 and the motor 2a are electrically connected by a motor electric wire (not shown). The power supply connection part 5 and the external power supply (not shown) are electrically connected by an external power supply electric wire 9.

[0025] The external power supply wire 9 is pulled from the top surface 1d or the side surface 1e of the housing 1a through a bush 10 into a storage section that stores the power supply connection section 5. The external power supply wire 9 is inserted into the connection section 5a of the power supply connection section 5. The connection section 5a of the power supply connection section 5 is a quick-connect terminal. By inserting the external power supply wire 9 into the connection section 5a, the external power supply wire 9 is connected to the power supply connection section 5.

[0026] Electric power supplied from an external power source (not shown) is transmitted to the motor 2a shown in Fig. 1 via the external power cable 9, the power connection unit 5, and a motor cable (not shown). Electric energy is converted into the rotational motion of the shaft 2c of the motor 2a, and the 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, flowing from the intake port 1f toward the exhaust port 1g.

[0027] As shown in Figs. 2 and 3, the terminal cover 6 is provided on the blower body 1 so as to be openable and closable, and covers the power connection portion 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 between a closed state in which the power connection portion 5 is covered as shown in Fig. 2 and an open state in which the power connection portion 5 is exposed as shown in Fig. 3. When the terminal cover 6 is closed as shown in Fig. 2, the power connection portion 5 is covered by the terminal cover 6 and isolated from the air passage, so that it is possible to prevent moisture, dust, and the like from entering the power connection portion 5 from the air passage. On the other hand, when the terminal cover 6 is open as shown in Fig. 3, the power connection portion 5 is exposed from the air intake 1f on the bottom surface 1c of the housing 1a, so that the power connection portion 5 can be accessed from the indoor side, and the work of connecting the external power supply wire 9 to the power connection portion 5 can be easily performed from the indoor side.

[0028] As shown in FIG. 2, the terminal cover 6 has a rotating shaft 6a. The fan casing 1b is provided with a support portion 1o that rotatably supports the rotating shaft 6a. The support portion 1o is formed with a rotation 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 on which a user can hook their finger. This makes it easy to open and close the terminal cover 6. The bottom surface 6b of the terminal cover 6 faces the inside of 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 section that stores the power connection section 5 when the terminal cover 6 is closed. The protective wall 1p is provided with a locking protrusion 1q that locks the terminal cover 6 in the closed state. This allows the terminal cover 6 to be maintained in the closed state. The terminal cover 6 has a holding portion 6d that holds the locking member 7 in a lock position, which will be described later. The holding portion 6d will be described in detail later.

[0030] The locking member 7 shown in Fig. 4 is movably provided on the blower body 1, and is capable of locking the opening operation of the terminal cover 6 and allowing the opening operation of the terminal cover 6. The locking member 7 is rotatably provided on the blower body 1. The material of the locking member 7 is, for example, a resin or a metal. The material of the locking member 7 is preferably a resin having both slidability and elasticity. An example of such a resin is polyacetal resin.

[0031] FIG. 5 is a partially enlarged bottom view showing the locking member 7 and the holding portion 6d according to the first embodiment, and shows a state in which the locking member 7 is in the unlocked position. FIG. 6 is a cross-sectional view taken along the line VI-VI shown in FIG. 5. FIG. 7 is a partially enlarged bottom view showing the locking member 7 and the holding portion 6d according to the first embodiment, and shows a state in which the locking member 7 is in the locked position. FIG. 8 is a cross-sectional view taken along the line VIII-VIII shown in FIG. 7. As shown in FIGS. 5 to 8, the blower body 1 is formed with 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] The symbol C shown in Figs. 6 and 8 indicates the central axis C of the hole 1r. The locking member 7 rotates around the central axis C of the hole 1r. Hereinafter, the direction parallel to the central axis C of the hole 1r is referred to as the axial direction, the direction perpendicular to the central axis C of the hole 1r is referred to as the orthogonal direction, and the direction of rotation of the locking member 7 around the central axis C of the hole 1r is referred to as the rotation direction. In the orthogonal direction, the direction toward the central axis C of the hole 1r is referred to as the inward direction, and the direction away from the central axis C of the hole 1r is referred to as the outward direction. In this embodiment, the axial direction is parallel to the vertical direction, but changes depending on the posture when the ventilation fan 100 is installed.

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

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

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

[0036] The leg 7b can be inserted into the hole 1r by elastically deforming inward in the perpendicular direction. When the locking member 7 is assembled to the fan casing 1b, the leg 7b is inserted into the hole 1r from the outside to the inside of the fan casing 1b, and the leg 7b is inserted into the hole 1r with the claw 7f at the front. At this time, when the claw 7f contacts the inner peripheral surface 1s of the hole 1r, the base 7e elastically deforms inward from the boundary with the head 7a as a base point. Then, when the leg 7b continues to be inserted into the hole 1r and the claw 7f overcomes the deep part of the hole 1r, the claw 7f is caught on the back side of the bottom surface 1j of the fan casing 1b. Also, the base 7e elastically deforms outward from the boundary with the head 7a as a base point, and the base 7e is pressed against the inner peripheral surface 1s of the hole 1r by the elastic restoring force. As a result, the locking member 7 is fixed in a state in which movement in the axial direction and the perpendicular direction relative to the fan casing 1b is restricted, while the locking member 7 is fixed in a state in which rotation in the rotational direction relative to the fan casing 1b is permitted. This point will be described later.

[0037] When the angle 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 θ, it is preferable that the relationship of 0°<θ<90° is satisfied. As shown in FIG. 9, the base portion 7e is formed with an anti-rattle rib 7h that protrudes outward. The contact portion 7g is a part of the anti-rattle rib 7h. The anti-rattle rib 7h contacts the inner circumferential surface 1s of the hole 1r and plays a role in preventing the locking member 7 from rattling. This structure makes it difficult for the leg portion 7b to come out of the hole 1r. The claw portion 7f protrudes outward from the anti-rattle rib 7h.

[0038] As shown in FIG. 8, the arm 7c is connected to the head 7a and is exposed to the outside of the blower body 1. As shown in FIG. 9, the arm 7c extends from the head 7a in a direction perpendicular to the direction in which the leg 7b extends. The position of the locking member 7 can be changed between a locked position in which the arm 7c contacts the terminal cover 6 in a closed state to lock the opening operation of the terminal cover 6 as shown in FIG. 7, and an unlocked position in which the arm 7c separates from the terminal cover 6 in a closed state to allow the opening operation of the terminal cover 6 as shown in FIG. 5. That is, the position of the locking member 7 can be changed between a locked position and an unlocked position by rotating the locking member 7. More specifically, the position of the locking member 7 can be changed to a locked position as shown in FIG. 7 by rotating the locking member 7 in the unlocked position shown in FIG. 5 from one side to the other in the rotation direction (counterclockwise on the paper) by 90 degrees. On the other hand, by rotating the locking member 7 in the locked position shown in FIG. 7 by 90 degrees from one side of the rotational direction to the other (clockwise on the page), the position of the locking member 7 can be changed to the unlocked position as shown in FIG. 5.

[0039] Next, the details of the holding portion 6d will be described with reference to Figs. 11 to 16, and the relationship between the locking member 7 and the holding portion 6d will be described. Fig. 11 is a cross-sectional perspective view showing the locking member 7 and the holding portion 6d according to the first embodiment, and shows a state in which the locking member 7 is in the locked position. Fig. 12 is a bottom view showing the terminal cover 6 according to the first embodiment. Fig. 13 is a side view showing the terminal cover 6 according to the first embodiment. Fig. 14 is a diagram showing the arm portion 7c and the holding portion 6d of the locking member 7 according to the first embodiment, and shows a state in which the locking member 7 is in the locked position. Fig. 15 is a diagram showing the holding portion 6d according to the first embodiment. Fig. 16 is a diagram showing the arm portion 7c of the locking member 7 according to the first embodiment. In Figs. 14 to 16, the up-down direction on the paper surface is the axial direction, and the left-right direction on the paper surface is the rotation direction. 14 to 16, the direction from the right to the left on the paper surface is the direction from one side of the rotation direction to the other side, and the direction from the left to the right on the paper surface is the direction from the other side of the rotation direction to one side. In this embodiment, the rotation direction is the first direction.

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

[0041] 14, the contact surface 6e is a portion that is formed on the bottom surface 6b of the terminal cover 6 and that comes into contact with the arm portion 7c in the locked position. The contact surface 6e is a flat surface that is perpendicular to the axial direction.

[0042] The first rib 6f is formed at one end of the contact surface 6e in the rotation direction and is a portion that protrudes at a first height H2 from the bottom surface 6b of the terminal cover 6. The cross-sectional shape of the first rib 6f in the axial direction is generally trapezoidal in this embodiment, 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 inclined so as to be located away from the contact surface 6e in the axial direction as it moves from one side to the other in the rotation direction. This makes it easier for the arm 7c to climb over the first rib 6f when it rotates from one side to the other in the rotation direction. In other words, the inclined surface 6h serves to guide the arm 7c into the accommodation space 6p described later.

[0044] The tip surface 6i extends from the other end of the inclined surface 6h in the rotation direction toward the other side in the rotation direction. 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 holding surface 6j is a surface that contacts the arm portion 7c in the locked position to hold the arm portion 7c. The first holding surface 6j extends in the axial direction from the other end of the tip surface 6i in the rotation direction toward the contact surface 6e. The first holding surface 6j is a surface perpendicular to the contact surface 6e. The first holding surface 6j is continuous with one end of the contact surface 6e in the rotation direction.

[0046] The second rib 6g is formed on the other end of the contact surface 6e in the rotation direction and protrudes from the bottom surface 6b of the terminal cover 6 at a second height H3. The cross-sectional shape of the second rib 6g in the axial direction is L-shaped in this embodiment, but may be changed as appropriate. The first rib 6f and the second rib 6g are disposed apart from each other in the rotation 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 in the axial direction 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 rotation direction. The vertical wall portion 6k and the first rib 6f are arranged apart from each other in the rotation direction. The vertical wall portion 6k has a second holding surface 6n. The second holding surface 6n is a surface that contacts the arm portion 7c in the locked position and holds the arm portion 7c. The second holding surface 6n extends in the axial direction from the other end of the contact surface 6e in the rotation direction toward the direction away from the contact surface 6e. The second holding surface 6n is a surface that faces the first rib 6f. The second holding surface 6n is a surface perpendicular to the contact surface 6e. The first holding surface 6j and the second holding surface 6n are arranged apart from each other in the rotation direction. The arm portion 7c in the locked position is sandwiched between the first holding surface 6j and the second holding surface 6n.

[0048] The horizontal wall portion 6m is a wall-like portion that protrudes from the tip of the vertical wall portion 6k toward the first rib 6f in one direction of rotation. The horizontal wall portion 6m does not reach the first rib 6f. The horizontal wall portion 6m and the contact surface 6e are arranged apart from each other in the axial direction. The horizontal wall portion 6m has a third holding surface 6o. The third holding surface 6o is a surface that contacts the arm portion 7c in the locked position to hold the arm portion 7c. The third holding surface 6o extends from an end portion of the second holding surface 6n in the axial direction that is located on the opposite side to the contact surface 6e toward the first rib 6f. The third holding surface 6o is a first surface that faces the contact surface 6e. The third holding surface 6o is a surface that is parallel to the contact surface 6e. The third holding surface 6o and the contact surface 6e are arranged apart from each other in the axial direction. The arm portion 7c in the locked position is sandwiched between the third holding surface 6o and the contact surface 6e.

[0049] The holding portion 6d has an accommodation space 6p surrounded by the contact surface 6e, the first holding surface 6j, the second holding surface 6n, and the third holding surface 6o. The accommodation space 6p accommodates the arm portion 7c in the locked position. The arm portion 7c in the locked position is surrounded and held 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 7c is rectangular. The arm 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 rotation direction. The second surface 7j extends in the rotation direction. The first surface 7i and the second surface 7j are arranged 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 rotation direction. The fourth surface 7m connects the other end of the first surface 7i and the second surface 7j in the rotation direction. The contact surface 6e contacts the first surface 7i. The first holding surface 6j contacts a portion of the third surface 7k close to the first surface 7i. The second holding surface 6n contacts the fourth surface 7m. The third holding surface 6o comes into contact with a portion of the second surface 7j closer to the fourth surface 7m.

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

[0052] The height in the axial direction from the third holding surface 6o to the tip surface 6i shown in FIG. 15 is defined as the height H4 of the opening 6s. 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 is defined as the shortest distance D of the opening 6s. As shown in FIG. 16, the height in the axial direction of the arm 7c is defined as the height H1 of the arm 7c. The height H4 of the opening 6s is preferably equal to or less than the height H1 of the arm 7c. The shortest distance D is preferably 1.0 times or more and 1.5 times or less than the height H1 of the arm 7c. That is, it is preferable that the relationship H4≦H1≦D is satisfied.

[0053] As shown in Fig. 15, the accommodation space 6p has a width W2 in the rotational direction and a height H5 along the axial direction. As shown in Fig. 16, the arm portion 7c has 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 accommodation space 6p. In other words, it is preferable that the relationships W1 = W2 and H1 = H5 hold.

[0054] As shown in FIG. 15 and FIG. 16, the height H1 of the arm portion 7c, the first height H2, and the second height H3 are H2

[0055] Here, the functions of the locking member 7, the first rib 6f, and the second rib 6g will be described in detail. As shown in Figs. 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 side of the rotation direction to the other side (from the right side to the left side of the paper). At this time, the arm 7c climbs over the first rib 6f from one side of the rotation direction (the right side of the paper) and is disposed in the accommodation space 6p. 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 the other side of the rotation direction to one side (from the left side to the right side of the paper). At this time, the arm 7c climbs over the first rib 6f from the other side of the rotation direction (the left side of the paper) and comes out of the accommodation space 6p.

[0056] ​The first rib 6f restricts the rotation of the locking member 7 from the locked position to the unlocked position without using 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 holding surface 6j contacts the arm 7c from one side in the rotation direction. When the locking member 7 is changed from the locked position to the unlocked position, the first holding surface 6j perpendicular to the contact surface 6e contacts the arm 7c before other parts, making it more difficult for the arm 7c to get over the first rib 6f compared to when the locking member 7 is changed from the unlocked position to the locked position. As a result, the arm 7c cannot get over the first rib 6f without using a tool, and the rotation of the locking member 7 to the unlocked position is restricted, but by rotating the locking member 7 using a tool, the arm 7c can get over 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, the locking member 7 cannot be rotated 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 by using a tool or a finger. 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 7c from the other side of the rotation direction. 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 so as to be located away from the contact surface 6e in the axial direction as it moves from one side of the rotation direction to the other side, contacts the arm 7c before other parts, making it easier for the arm 7c to get over the first rib 6f. This allows the locking member 7 to be rotated by a finger without using a tool, and the arm 7c gets over the first rib 6f, allowing the locking member 7 to rotate to the locked position.

[0058] As shown in FIG. 14, the second rib 6g restricts the rotation of the locking member 7 from the locked position to the unlocked position without using 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 second holding surface 6n contacts the arm 7c from the other side of the rotation direction, making it difficult for fingers to get between the second holding surface 6n and the arm 7c. Also, when the locking member 7 is in the locked position, the third holding surface 6o covers the arm 7c from the side opposite to the contact surface 6e, making it difficult for fingers to get between the second holding surface 6n and the arm 7c. This makes it difficult to apply a load to the locking member 7 to rotate the locking member 7 from the other side of the rotation direction to one side without using a tool, and also makes it difficult to rotate the locking member 7 by pinching it with fingers. For this reason, unless a tool is used, rotation of the locking member 7 to the unlocked position is restricted, but by using a tool to rotate the locking member 7, the arm 7c overcomes the first rib 6f, allowing rotation of the locking member 7 to the unlocked position. In other words, when the locking member 7 is in the locked position, the locking member 7 cannot be rotated to the unlocked position without using a tool, and the terminal cover 6 cannot be opened. The second rib 6g allows rotation of the locking member 7 from the unlocked position to the locked position using a tool or with a finger.

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

[0060] As shown in FIG. 5 and FIG. 7, a third rib 1t is formed on the bottom surface 1j of the fan casing 1b. The third rib 1t is arranged around the hole 1r. The third rib 1t is arranged on the other side of the rotation direction (counterclockwise on the paper) of the second rib 6g. The third rib 1t is arranged 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 portion along the rotation direction. The stopper portion 1v is a portion that extends from an end of the arc-shaped portion 1u close to the second rib 6g toward one side of the rotation direction (clockwise on the paper). The stopper portion 1v is arranged 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 using a tool, but allows the rotation of the locking member 7 from the locked position to the unlocked position by using a tool. Specifically, when the locking member 7 is in the locked position, the third rib 1t contacts the head 7a from the other side of the rotation direction, or is disposed on the other side of the rotation direction with a gap between the third rib 1t and the head 7a that is large enough to prevent a finger from entering between them, making it difficult for a finger to enter 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 the locking member 7 from the other side of the rotation direction to one side without using a tool, and it is also difficult to rotate the locking member 7 by pinching it with fingers. For this reason, the rotation of the locking member 7 to the unlocked position is restricted without using a tool, but the arm 7c can overcome the first rib 6f by rotating the locking member 7 using a tool, allowing the locking member 7 to rotate to the unlocked position. That is, when the locking member 7 is in the locked position, the locking member 7 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 with a finger. Although it is preferable that the blower 200 includes all of the first rib 6f, the second rib 6g, and the third rib 1t, it is sufficient that the blower 200 includes at least the first rib 6f and the second rib 6g.

[0062] As shown in FIG. 7, a fourth rib 1w is formed on the bottom surface 1j of the fan casing 1b. The fourth rib 1w is arranged around the hole 1r. The fourth rib 1w is arranged on the opposite side of the third rib 1t across the hole 1r in the perpendicular direction. The fourth rib 1w plays a role in preventing damage, deformation, etc. of the locking member 7 caused by the tip of the spring 4a shown in FIG. 1 being caught by the locking member 7. That is, when the spring 4a of the decorative grill 4 shown in FIG. 1 is caught on the spring fixing part 1n attached to the fan casing 1b shown in FIG. 2, the fourth rib 1w shown in FIG. 2 prevents the tip of the spring 4a from being caught by the locking member 7, so that damage, deformation, etc. of the locking member 7 can be prevented.

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

[0064] In this embodiment, as shown in Fig. 2 and Fig. 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 portion 5 in a closed state, and a locking member 7 that is movably provided on the blower body 1 and is capable of locking the opening operation of the terminal cover 6 and allowing the opening operation of the terminal cover 6. As shown in Fig. 6 and Fig. 8, the locking member 7 has a head 7a that is exposed to the outside of the blower body 1 and has a connecting portion 7d that can connect a tool formed thereto, a leg portion 7b that is connected to the head 7a and is inserted into the hole 1r, and an arm portion 7c that is connected to the head 7a and is exposed to the outside of the blower body 1. As shown in Fig. 5 and Fig. 7, the position of the locking member 7 can be changed between a locking position where the arm portion 7c comes into contact with the terminal cover 6 in a closed state to lock the opening operation of the terminal cover 6, and an unlocking position where the arm portion 7c is separated from the terminal cover 6 in a closed state to allow the opening operation of the terminal cover 6. With these configurations, the position of the locking member 7 can be changed between a locked position and an unlocked position using a tool connected to the connecting portion 7d. When the position of the locking member 7 is changed to the locked position shown in Fig. 7, the opening operation of the terminal cover 6 is locked. In this state, the user cannot open the terminal cover 6 without using a tool, which prevents the user from accidentally touching the power connection portion 5.

[0065] In this embodiment, the position of the locking member 7 is set to the unlocked position shown in FIG. 5 before shipping, so that when the external power supply wire 9 shown in FIG. 3 is connected to the power supply connector 5, the terminal cover 6 can be easily opened without using tools. After the connection work is completed, the position of the locking member 7 can be changed from the unlocked position shown in FIG. 5 to the locked position shown in FIG. 7 by finger without using tools, so that the terminal cover 6 can be closed and the opening operation of the terminal cover 6 can be locked without using tools. This improves the workability during installation and maintenance work. In this embodiment, since it is not necessary to remove and attach the locking member 7 every time the terminal cover 6 is opened and closed, the workability during installation and maintenance work is improved and the loss of parts during installation and maintenance work can be prevented. Therefore, in this embodiment, a blower 200 can be obtained that can improve the workability during installation and maintenance work and prevent the loss of parts while having a structure in which the terminal cover 6 cannot be opened without using tools.

[0066] 5 and 7, in this embodiment, the locking member 7 is rotatably provided 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 the locked position and the unlocked position by simply rotating the locking member 7.

[0067] In this embodiment, as shown in Fig. 6, the leg portion 7b is branched into multiple parts from the head portion 7a and is elastically deformable. With this configuration, the leg portion 7b elastically deforms to fit the shape of the inner circumferential surface 1s of the hole 1r, and the elastic force of the leg portion 7b can be used to fix the locking member 7 to the hole 1r of the fan casing 1b.

[0068] 6, when the angle between the contact portion 7g of the leg 7b that comes into contact with 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 7b is small, the leg 7b is less likely to come out of the hole 1r.

[0069] In the present embodiment, the material of the locking member 7 shown in Fig. 6 is a resin that has both slidability and elasticity. This configuration makes it easier to rotate the locking member 7 with respect to the hole 1r and also makes it easier to fix the locking member 7 to the hole 1r.

[0070] In this embodiment, as shown in Fig. 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 that is formed on the bottom surface 6b of the terminal cover 6 and that contacts the arm portion 7c in the locked position, a first rib 6f that is formed on one end of the contact surface 6e in the rotation direction and that protrudes from the bottom surface 6b of the terminal cover 6 at a first height H2, and a second rib 6g that is formed on the other end of the contact surface 6e in the rotation direction and that protrudes 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, so that the locking member 7 can be maintained in the locked position.

[0071] In this embodiment, as shown in Fig. 14, when the position of the locking member 7 is changed from the unlocked position to the locked position, the arm 7c passes over the first rib 6f and rotates from one side to the other side in the rotation direction, and when the position of the locking member 7 is changed from the locked position to the unlocked position, the arm 7c passes over the first rib 6f and rotates from the other side to one side in the rotation direction.

[0072] ​In this embodiment, as shown in FIG. 14, the second rib 6g has a vertical wall portion 6k protruding from the bottom surface 6b of the terminal cover 6 at a second height H3, and a horizontal wall portion 6m protruding from the tip of the vertical wall portion 6k toward the first rib 6f in one direction in the rotation direction. The horizontal wall portion 6m has a third holding surface 6o facing 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 through which the arm portion 7c can pass is formed between one end 6q of the third holding surface 6o in the rotation direction and the other end 6r of the tip surface 6i in the rotation direction. The height H4 of the opening 6s is equal to or less than the height H1 of the arm portion 7c. The shortest distance D from one end 6q of the third holding surface 6o in the rotation direction to the other end 6r of the tip surface 6i in the rotation direction is 1.0 to 1.5 times the height H1 of the arm portion 7c. With these configurations, when the position of the locking member 7 is changed from the locked position to the unlocked position, the arm portion 7c climbs over the first rib 6f and passes through the opening 6s, allowing the arm portion 7c to be positioned in the retaining portion 6d.

[0073] Next, a modification of the first embodiment will be described.

[0074] In this embodiment, the power supply connection part 5 shown in Fig. 3 is disposed inside the blower body 1, but may be disposed outside the blower body 1. The power supply connection part 5 may be disposed, for example, above the top surface 1d of the housing 1a shown in Fig. 1. In this manner, the power supply connection part 5 can be protected from a rise in temperature inside the blower body 1 caused by the driving of the motor 2a. When the power supply connection part 5 is disposed 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 present disclosure is applied to the ventilation fan 100 installed on the ceiling 12 shown in Fig. 1, but the present disclosure is not limited thereto. The blower 200 according to the present disclosure may also be applied to a ventilation fan attached to a wall or floor. The blower 200 according to the present disclosure may also be applied to other devices such as a circulator or an air conditioner.

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

[0077] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention.

[0078] Various aspects of the present disclosure are summarized below as appendices.

[0079] (Appendix 1) a blower body having a fan casing that forms an air passage, the blower body being formed with an intake port for taking in indoor air and an exhaust port for exhausting the intake air; a blower unit having a fan installed inside the fan casing and rotated by driving a motor, the blower unit generating an airflow that flows from the intake port into the blower body and flows out from the exhaust port; a power supply connection portion provided in the blower body and configured to connect the motor to an external power supply; a terminal cover that is provided on the blower body in an openable and closable manner and covers the power connection portion when closed; a locking member movably provided on the blower body, capable of locking an opening operation of the terminal cover and 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 head portion formed with a connecting portion capable of connecting a tool and exposed to an outside of the blower body; a leg portion connected to the head portion and inserted into the hole; An arm portion connected to the head portion and exposed to the outside of the blower body; having A blower characterized in that the position of the locking member can be changed between a locked position in which the arm contacts the terminal cover in a closed state to lock the opening operation of the terminal cover, and an unlocked position in which the arm separates from the terminal cover in a closed state to allow the opening operation of the terminal cover. (Appendix 2) The locking member is rotatably provided on the blower body, 2. The blower according to claim 1, wherein the position of the locking member can be changed between the locked position and the unlocked position by rotating the locking member. (Appendix 3) 3. The blower according to claim 1, wherein the leg portion is branched into a plurality of parts from the head portion and is elastically deformable. (Appendix 4) The blower described in any one of Appendices 1 to 3, wherein when the angle between the contact portion of the leg portion that contacts the inner surface of the hole and the central axis of the hole is θ, the relationship 0°<θ<90° holds. (Appendix 5) 5. The blower according to claim 1, wherein the locking member is made of a resin having both slidability and elasticity. (Appendix 6) the terminal cover has a holding portion that holds the locking member in the locked position, The holding portion is a contact surface formed on an outer surface of the terminal cover and adapted to come into contact with the arm portion in the locked position; a first rib formed at one end of the contact surface in a first direction and protruding from an outer surface of the terminal cover at a first height; a second rib formed on the other end of the contact surface in the first direction and protruding from an outer surface of the terminal cover at a second height; having When the position of the locking member is changed from the unlocked position to the locked position, the arm portion moves from one side to the other side in the first direction, climbing over the first rib, When the position of the locking member is changed from the lock position to the unlock position, the arm portion moves from the other side to the one side in the first direction, climbing over the first rib, When the height of the arm is H1, the first height is H2, and the second height is H3, H2 (Appendix 7) The second rib includes: a vertical wall portion protruding from an outer surface of the terminal cover at the second height; a horizontal wall portion protruding in one of the first directions from a tip of the vertical wall portion toward the first rib; having The lateral wall portion has a first surface facing the contact surface, the first rib has a second surface located at a tip of the first rib; an opening through which the arm portion can pass 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; The height of the opening is equal to or less than the height of the arm portion, The blower described in 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 greater than or equal to 1.0 and less than or equal to 1.5 times the height of the arm portion. [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 portion, 1i screw hole, 1k suction port, 1m outlet port, 1n spring fixing portion, 1o support portion, 1p protective wall, 1q locking projection, 1r hole, 1s inner peripheral surface, 1t third rib, 1u arc-shaped portion, 1v stopper portion, 1w fourth rib, 2 blower portion, 2a motor, 2b fan, 2c shaft, 3 duct connection port, 4 decorative grill, 4a spring, 4b spring fixing part, 5 power connection portion, 5a wiring portion, 6 terminal cover, 6a rotating shaft, 6c finger hook portion, 6d holding portion, 6e contact surface, 6f first rib, 6g second rib, 6h inclined surface, 6i tip surface, 6j first retaining surface, 6k vertical wall portion, 6m horizontal wall portion, 6n second retaining surface, 6o third retaining surface, 6p storage space, 6q one end, 6r the other end, 6s opening, 7 locking member, 7a head, 7b leg portion, 7c arm portion, 7d connecting portion, 7e base portion, 7f claw portion, 7g contact portion, 7h anti-rattle rib, 7i first surface, 7j second surface, 7k third surface, 7m fourth surface, 8 shutter, 9 external power supply cable, 10 bushing, 11 screw, 12 ceiling, 12a installation hole, 13 attic, 100 ventilation fan, 200 blower, 300 duct.

Claims

1. a blower body having a fan casing that forms an air passage, the blower body being formed with an intake port for taking in indoor air and an exhaust port for exhausting the intake air; a blower unit having a fan installed inside the fan casing and rotated by driving a motor, the blower unit generating an airflow that flows from the intake port into the blower body and flows out from the exhaust port; a power supply connection portion provided in the blower body and configured to connect the motor to an external power supply; a terminal cover that is provided on the blower body in an openable and closable manner and covers the power connection portion when closed; a locking member movably provided on the blower body, capable of locking an opening operation of the terminal cover and allowing the opening operation of the terminal cover; Equipped with The blower body has a hole formed therein that opens to the outside of the blower body, The locking member is a head portion formed with a connecting portion capable of connecting a tool and exposed to an outside of the blower body; a leg portion connected to the head portion and inserted into the hole; An arm portion connected to the head portion and exposed to the outside of the blower body; having A blower characterized in that the position of the locking member can be changed between a locked position in which the arm contacts the terminal cover in a closed state to lock the opening operation of the terminal cover, and an unlocked position in which the arm separates from the terminal cover in a closed state to allow the opening operation of the terminal cover.

2. The locking member is rotatably provided on the blower body, 2. The blower according to claim 1, wherein the position of the locking member is changeable between the locked position and the unlocked position by rotating the locking member.

3. The blower according to claim 1 , wherein the leg portion is branched into a plurality of parts from the head portion and is elastically deformable.

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

5. 2. The blower according to claim 1, wherein the locking member is made of a resin having both slidability and elasticity.

6. the terminal cover has a holding portion that holds the locking member in the locked position, The holding portion is a contact surface formed on an outer surface of the terminal cover and adapted to come into contact with the arm portion in the locked position; a first rib formed at one end of the contact surface in a first direction and protruding from an outer surface of the terminal cover at a first height; a second rib formed on the other end of the contact surface in the first direction and protruding from an outer surface of the terminal cover at a second height; having When the position of the locking member is changed from the unlocked position to the locked position, the arm portion moves from one side to the other side in the first direction, climbing over the first rib, When the position of the locking member is changed from the lock position to the unlocked position, the arm portion moves from the other side to the one side in the first direction, climbing over the first rib, 2. The blower according to claim 1, wherein when the height of the arm portion is H1, the first height is H2, and the second height is H3, a relationship of H2<H1<H3 is satisfied.

7. The second rib includes: a vertical wall portion protruding from an outer surface of the terminal cover at the second height; a horizontal wall portion protruding in one of the first directions from a tip of the vertical wall portion toward the first rib; having The lateral wall portion has a first surface facing the contact surface, the first rib has a second surface located at a tip of the first rib; an opening through which the arm portion can pass 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; The height of the opening is equal to or less than the height of the arm portion, The blower according to claim 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 greater than or equal to 1.0 times and less than or equal to 1.5 times the height of the arm portion.

Images