JP3215502U - Structure of the neck of the electric fan - Google Patents

Abstract

To provide a structure of a neck portion of a fan that improves durability and freedom of design. A neck portion 4 of an electric fan is attached to an attachment 6 attached to a column, an angle holding member 7 attached to the attachment 6 and provided with a plurality of angle holding holes 72, and an attachment to a motor portion. The neck holder 5 and the angle holding pin 44 movably provided on the neck holder 5 and biased toward the angle holding member 7, and the fixture 6 and the neck holder 5 are relatively The angle holder pin 44 is configured so that the angle between the neck holder 5 and the fixture 6 is held when the angle holding pin 44 enters any one of the plurality of angle holding holes 72. The tool 6 is made of resin, and the angle holding member 7 is made of metal. [Selection] Figure 2

Description

  The present invention relates to the structure of the neck of a fan. In particular, the present invention relates to a structure of a neck portion that connects a main shaft (support) of a fan and a motor portion so as to be rotatable in the vertical direction.

  Some electric fans have a configuration in which a motor part and a support (main shaft) are connected by a neck part. In some cases, the motor unit and the main shaft are coupled so as to be rotatable in the vertical direction (tilt direction) by the neck so that the vertical direction (tilt angle) of the motor unit can be changed. Patent Document 1 discloses a configuration in which a neck piece is formed of a resin material. Such a neck portion has a movable portion so that the tilt angle of the motor portion can be changed. For this reason, durability is requested | required of a neck part. Further, the neck portion is required to have a strength capable of holding the tilt angle set by the user or the like so that the tilt angle does not change regardless of the user's operation. In particular, commercial fans (fans used in factories, offices, etc.) are more durable than fans used in ordinary households, so there is a high demand for higher neck strength. For this reason, the metal plate is used for the neck piece which comprises the neck part of a commercial fan. However, when the member constituting the neck portion of the electric fan is made of a metal plate, the degree of freedom in shape is low as compared to the structure made of a resin material.

JP 2003-106291 A

  In view of the above circumstances, the problem to be solved by the present invention is to provide a neck structure of a fan that can secure strength and durability while increasing the degree of freedom of shape.

  In order to solve the above-mentioned problems, the present invention is a structure of a neck portion of an electric fan that connects a support column and a motor unit, and the neck unit is attached to the support column, and the attachment unit is attached to the attachment tool. An angle holding member provided with a plurality of angle holding holes, a neck holder attached to the motor unit, a movably provided on the neck holder, and biased toward the angle holding member An angle holding pin, wherein the fixture and the neck holder are rotatably connected to each other, and the angle holding pin enters any one of the plurality of angle holding holes. Thus, the angle between the neck holder and the fixture is held, the fixture is made of resin, and the angle holding member is made of metal.

  According to the present invention, strength and durability can be secured while increasing the degree of freedom of the shape of the neck.

FIG. 1 is a perspective view schematically showing a configuration example of a fan to which a neck structure according to an embodiment of the present invention can be applied. FIG. 2 is an exploded perspective view schematically showing an example of the structure of the neck according to the embodiment of the present invention. FIG. 3 is a perspective view schematically showing a configuration example of the neck holder. FIG. 4 is a perspective view schematically showing a configuration example of the fixture. FIG. 5 is a perspective view schematically showing a configuration example of the structure of the neck according to the embodiment of the present invention. FIG. 6 is a cross-sectional view schematically showing a configuration example of the structure of the neck according to the embodiment of the present invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In each figure, the upper side of the electric fan is indicated by an arrow “Up”, and the lower side is indicated by an arrow “Dw”. As a fan to which the neck structure according to the embodiment of the present invention is applied, a stand-type commercial fan is shown. Commercial fans are sometimes called, for example, “factory fans” or “industrial fans”. Commercial electric fans are suitable for use in factories and offices, and produce a stronger wind than electric fans used in ordinary households. However, the structure of the neck to which the present invention is applied is not limited to a stand-type commercial fan. The present invention can be applied not only to a stand type, but also to a wall-mounted or floor-standing fan. In addition, the present invention can be applied not only to commercial fans but also to household fans.

  First, the example of the whole structure of the electric fan 1 which can apply the structure of the neck part 4 which concerns on embodiment of this invention is demonstrated with reference to FIG. FIG. 1 is a perspective view schematically showing a configuration example of a fan 1 to which the structure of the neck 4 according to the embodiment of the present invention can be applied. As shown in FIG. 1, the electric fan 1 includes a motor unit 14, a column 12 that supports the motor unit 14, a stand 11 that supports the column 12, a blade 17 provided on the front side of the motor unit 14, and a blade 17. It has a front guard 15 and a rear guard 16 for covering.

  The motor unit 14 includes a motor 141 that is a driving source for the rotation of the blades 17 and the swinging of the motor unit 14, a swing mechanism for swinging the motor unit 14 by the power of the motor 141, and the motor 141 and the swinging motion. And a cover member 142 that covers the mechanism. The blade 17 is attached to the rotating shaft of the motor 141, the rear guard 16 is attached to the front side of the motor 141, and the front guard 15 is attached to the front side of the rear guard 16. In addition, the structure of the motor part 14, the blade | wing 17, the front guard 15, and the rear guard 16 is not specifically limited, Conventionally well-known various structures are applicable.

  The motor unit 14 is coupled to the column 12 so as to be rotatable in the vertical direction (tilt direction) by the neck 4 according to the present embodiment. For this reason, the vertical direction (tilt angle) of the motor unit 14 can be changed by rotating the motor unit 14 in the vertical direction (centering on the axis extending in the horizontal direction). Moreover, the motor part 14 is supported by the neck part 4 so that a swing is possible.

  The support column 12 (main shaft) is a member that supports the motor unit 14 via a neck 4 described later. A cylindrical member made of metal, for example, can be applied to the column 12. The column 12 is supported by the stand 11. In FIG. 1, a configuration in which a tripod is applied as the stand 11 is shown as an example, but the configuration of the stand 11 is not particularly limited. The stand 11 may be configured to be able to support the support column 12 so that the extending direction (axial direction) of the support column 12 is parallel to the gravity direction (for example, at right angles to the installation surface of the electric fan 1).

  FIG. 2 is an exploded perspective view schematically showing an example of the structure of the neck 4 according to the present embodiment. FIG. 3 is an external perspective view schematically showing a configuration example of the neck holder 5 included in the structure of the neck 4 according to the present embodiment. FIG. 4 is a cross-sectional view schematically showing a configuration example of the fixture 6 included in the structure of the neck 4 according to the present embodiment. FIG. 5 is an external perspective view schematically showing a state in which the neck portion 4 is assembled.

  As shown in FIGS. 2 to 4, the neck portion 4 according to this embodiment includes a neck holder 5, a fixture 6, a first biasing member 43, an angle holding member 7, an angle holding pin 44, The second urging member 45, the connecting bolt 41, and the nut 42 are included. The first urging member 43, the angle holding pin 44, and the second urging member 45 are attached to the neck holder 5. The angle holding member 7 is attached to the fixture 6. The neck holder 5 and the fixture 6 are connected by a connecting bolt 41 and a nut 42 so as to be relatively rotatable about the axis (center line) of the connecting bolt 41. By rotating the neck holder 5 and the fixture 6 relatively, the vertical direction (tilt angle) of the motor unit 14 can be changed.

  The neck holder 5 has a motor support portion 51 and a connecting portion 52. The motor support portion 51 is a portion that supports the motor portion 14 so as to be rotatable in the swinging direction (pan direction). The connecting portion 52 is a portion that is connected to the fixture 6 so as to be relatively rotatable in the vertical direction (tilt direction). The neck holder 5 is made of a resin material, and the motor support portion 51 and the connecting portion 52 are integrally formed. For example, glass fiber reinforced PP (polypropylene) or the like can be applied to the neck holder 5. And the motor support part 51 and the connection part 52 of the neck holder 5 are integrally formed by the injection molding of the resin material.

  The motor support unit 51 supports the motor unit 14 so as to be rotatable in the swinging direction. In the present embodiment, a configuration in which the motor unit 14 is rotatably supported in the swinging direction via a support pin 143 provided in the motor unit 14 is shown as an example. Specifically, the motor portion 14 is provided with a cylindrical support pin 143 that protrudes downward, and the motor support portion 51 of the neck holder 5 has a round hole into which the support pin 143 can be inserted. A support pin insertion hole 511 is provided. In this case, a hollow cylindrical configuration in which a support pin insertion hole 511 is formed can be applied to the motor support portion 51. When the support pin 143 of the motor unit 14 is inserted into the support pin insertion hole 511 of the connection unit 52 of the neck holder 5, the motor unit 14 can be rotated in the swinging direction by the motor support unit 51 of the neck holder 5. Supported. Note that the swinging direction here refers to the circumferential direction of a circle centered on a substantially vertical axis. More specifically, it means the circumferential direction of a circle centered on the axis (on the surface) perpendicular to the axial direction of the connecting bolt 41 that rotatably connects the neck holder 5 and the fixture 6. . The motor support portion 51 may be configured to be able to support the motor portion 14 so as to be rotatable about an in-plane (on-plane) axis perpendicular to the axis of the connecting bolt 41, and the specific configuration is not limited.

  A flange portion 53 is integrally provided on the motor support portion 51 of the neck holder 5. For the flange portion 53, for example, a plate-like configuration extending in a direction perpendicular to the axial direction of the support pin insertion hole 511 is applied. A link member of the swing mechanism is connected to the flange portion 53. The motor unit 14 and the motor support unit 51 are relatively rotated (oscillated) around the axis of the support pin insertion hole 511 by a swing mechanism that is operated by the rotational power of the motor 141. Thereby, the motor unit 14 swings. The flange 53 is provided with an opening (through hole) for inserting the power cord 18 for supplying power to the motor 141 from the outside. In addition, the structure of the flange part 53 is not specifically limited.

  The connection portion 52 of the neck holder 5 includes a connection bolt insertion hole 521 for inserting the connection bolt 41, an angle holding pin housing portion 522 for housing the angle holding pin 44, and a first biasing member 43. An urging member accommodating portion 523 for accommodating is provided. For example, a cylindrical or disk-shaped (drum-shaped) configuration in which the axis (center line) is parallel to the horizontal direction (in other words, the direction perpendicular to the axis of the support column 12) can be applied to the connecting portion 52. In this case, the connecting bolt insertion hole 521 is a through hole that penetrates in the axial direction of the connecting portion 52 and is provided at the center of the end surface of the connecting portion 52 in the axial direction.

  The angle holding pin accommodating portion 522 is a portion that can accommodate the angle retaining pin 44 so as to be capable of reciprocating in a direction parallel to the axis of the connecting bolt insertion hole 521. For example, a bottomed concave portion can be applied to the angle holding pin accommodating portion 522. And as shown in FIG. 3, it provides in the outer periphery part vicinity of one end surface of the axial direction of the connection part 52. As shown in FIG. In addition, the specific structure of the angle holding pin accommodating part 522 is not specifically limited. The angle holding pin accommodating portion 522 may be configured to accommodate the angle holding pin 44 so as to be able to reciprocate in a direction parallel to the axis of the connecting bolt insertion hole 521.

  The urging member accommodating portion 523 is a portion that can accommodate the first urging member 43. As shown in FIG. 3, the urging member accommodating portion 523 is provided on the end surface opposite to the end surface on the side where the angle holding pin accommodating portion 522 of the connecting portion 52 is provided. For example, a bottomed concave portion can be applied to the biasing member accommodating portion 523. Further, the linking member 52 is provided with an urging member locking portion 524. The urging member locking portion 524 is a portion where one arm portion 431 (described later) of the first urging member 43 is locked. For example, the urging member locking portion 524 has a structure that protrudes from the inner peripheral surface of the urging member housing portion 523 toward the center side (the connection bolt insertion hole 521 side). Then, one arm portion 431 of the first urging member 43 accommodated in the urging member accommodating portion 523 is engaged with the urging member engaging portion 524, whereby the first urging member 43 is connected to the connecting bolt. The rotation with respect to the neck holder 5 around the axis of the insertion hole 521 is restricted. The urging member accommodating portion 523 may be any configuration that can accommodate the first urging member 43, and the specific configuration is not limited. Further, the biasing member locking portion 524 is configured such that the rotation of the first biasing member 43 with respect to the neck holder 5 is restricted when a part of the first biasing member 43 is locked. Any specific configuration (shape, etc.) is not limited.

  The fixture 6 has a column fixing part 61 and two support parts 62a and 62b. The column fixing part 61 is a part that is attached to and fixed to the upper end of the column 12. The two support portions 62a and 62b are portions that rotatably support the connecting portion 52 of the neck holder 5. The fixture 6 is made of a resin material, and the support fixing part 61 and the two support parts 62a and 62b are integrally formed. For example, the column fixing portion 61 and the two support portions 62a and 62b of the fixture 6 are integrally formed by injection molding of a resin material. As a resin material of the fixture 6, for example, ABS can be applied.

  The column fixing part 61 is a portion fixed to the column 12 and has a configuration corresponding to the configuration of the column 12. In the present embodiment, an example in which the support column 12 is a cylindrical member is shown. In this case, a cylindrical configuration in which the lower end side is opened and the upper end side is closed can be applied to the column fixing part 61 of the fixture 6 so that the column can be fixed to the columnar column 12. The support fixing portion 61 is provided with a fixing screw insertion hole 611 that is a through hole through which a fixing screw fastened to the support 12 can be inserted. When the column fixing part 61 is mounted so as to cover the upper end of the column 12 from above, and the fixing screw is fastened to the column 12 through the fixing screw insertion hole 611, the fixture 6 cannot be rotated or moved to the column 12. Fixed to. In addition, the structure of the support | pillar fixing | fixed part 61 is not specifically limited. The column fixing part 61 may be configured to be fixed to the column 12 and is appropriately set according to the configuration of the column 12.

  The two support parts 62a and 62b have a flat plate-like structure extending from the support post fixing part 61 toward the upper side (the motor part 14 side). The two support portions 62a and 62b are provided apart from each other at a predetermined distance in the horizontal direction (direction perpendicular to the axis of the support column 12). The inner side surfaces 601 of the two support portions 62a and 62b (refer to surfaces facing each other; the same applies hereinafter) are substantially parallel. Further, the distance between the inner side surfaces 601 is set to a distance at which the connecting portion 52 of the neck holder 5 can be inserted between them. Specifically, the distance between the inner surfaces 601 of the two support portions 62a and 62b is substantially the same as the axial dimension of the connecting portion 52 of the neck holder 5 (the axial dimension of the connecting bolt insertion hole 521), or the neck The distance is set by adding a margin or the like to the axial dimension of the connecting portion 52 of the holder 5. The two support portions 62a and 62b are provided with a connecting bolt insertion hole 626 that is a through hole through which the connecting bolt 41 can be inserted. Further, a concave portion (not shown) into which the head of the connecting bolt 41 and a washer can be fitted is provided coaxially on the outer peripheral side of the connecting bolt insertion hole 626 on the outer side surface 602 of one support portion 62a. A nut engaging recess 625, which is a recess that can be engaged with the nut 42, is provided on the outer surface 602 (referred to as a surface opposite to the inner surface 601) of the other support portion 62 b. It is provided coaxially on the outer peripheral side.

  An angle holding member engaging recess 621 is provided on the inner surface 601 of one of the two support portions 62a and 62b, and the angle is held near the inner surface 601 of the one support portion 62a. A member holding part 622 is provided. The angle holding member engaging recess 621 is a recess into which the angle holding member 7 can be fitted. The size and shape of the angle holding member engaging recess 621 may be substantially the same as the size and shape of the angle holding member 7. However, the shape and dimensions of the angle holding member engaging recess 621 are not particularly limited. In short, the angle holding member engaging recess 621 may be configured so that the angle holding member 7 can be fitted therein.

  The angle holding member holding portion 622 is a portion having a function of holding the angle holding member 7 in a state of being fitted in the angle holding member engaging recess 621 provided in one support portion 62a. In addition, the angle holding member holding portion 622 also has a function of holding the angle holding member 7 so as not to move (particularly not rotate) with respect to the one support portion 62a. In the present embodiment, it has a plate-like (tongue piece-like) configuration that extends upward from the base portion of the support portion 62a (the upper surface of the support post fixing portion 61) where the angle holding member engaging recess 621 is provided. When the held portion 74 that is a part of the angle holding member 7 is inserted between the inner surface 601 of the angle holding member engaging recess 621 and the angle holding member holding portion 622, the angle holding member 7 is supported on one side. It is held by the part 62a. Note that the configuration of the angle holding member holding portion 622 is not particularly limited. In short, any configuration may be used as long as the angle holding member 7 can be held by the one support portion 62a.

  A biasing member locking portion 623 that locks the first biasing member 43 is provided in the vicinity of the base portion of the inner surface of the other support portion 62b. In the present embodiment, the urging member locking portion 623 is a cylinder provided along the inner peripheral surface of the other support portion 62b so that the one arm portion 431 of the first urging member 43 can be inserted. The example which has a shape-like structure is shown. The urging member locking portion 623 engages the first urging member 43 in the relative rotation direction of the neck holder 5 and the fixture 6 (circumferential direction of a circle coaxial with the connecting bolt insertion hole 626). Any configuration that can be stopped may be used, and a specific configuration is not limited.

  The angle holding member 7 is a member made of a metal material that is harder than the fixture 6 and has high wear resistance. If the fixture 6 is formed of a resin material such as ABS, a metal plate material such as a stainless steel plate can be applied to the angle holding member 7. In this case, the angle holding member 7 can be manufactured by press working. The angle holding member 7 is not limited to stainless steel as long as it is made of a metal material that is harder than the fixture 6 and has high wear resistance. However, from the viewpoint of strength and durability, a material that is as hard as possible and has high wear resistance is preferable.

  The angle holding member 7 is provided with a connecting bolt insertion hole 71, a plurality of angle holding holes 72, and two rotation restricting portions 73. The connection bolt insertion hole 71 is a through hole through which the connection bolt 41 can be inserted, and penetrates in the thickness direction of the angle holding member 7. The plurality of angle holding holes 72 are through holes into which the distal ends of angle holding pins 44 described later can enter. The plurality of angle holding holes 72 are provided so as to be arranged at predetermined intervals in the circumferential direction of a circle concentric with the connecting bolt insertion hole 71. Specifically, in a state where the neck holder 5 and the fixture 6 are connected, the distal end portion of the angle holding pin 44 received in the angle holding pin receiving portion 522 of the connecting portion 52 of the neck holder 5 can enter. Provided in position. The two rotation restricting portions 73 are portions that restrict the relative rotation range of the neck holder 5 and the fixture 6 (that is, the movable range of the tilt angle of the motor portion 14). In the present embodiment, protrusions provided integrally with the angle holding member 7 are applied as the two rotation restricting portions 73. That is, the two rotation restricting portions 73 are provided as a part of the angle holding member 7 instead of a configuration in which a member separate from the angle holding member 7 is attached. The rotation restricting portion 73 is formed by, for example, pressing. The two rotation restricting portions 73 are provided on the outer side in the circumferential direction of the plurality of angle holding holes 72 arranged side by side on a circle concentric with the connecting bolt insertion hole 71. In other words, two rotation restricting portions 73 are provided on a circle concentric with the connecting bolt insertion hole 71, and a plurality of angle holding holes 72 are provided on the circle between the two rotation restricting portions 73 in the circumferential direction. It is provided side by side. Therefore, the positions of the angle holding hole 72 and the rotation restricting portion 73 are set according to the position of the angle holding pin accommodating portion 522 provided in the connecting portion 52 of the neck holder 5. The number and interval of the angle holding pins 44 are not particularly limited.

  The first urging member 43 is a member that urges the neck holder 5 and the fixture 6 in the circumferential direction of a circle around the axis of the connecting bolt 41. In the present embodiment, an example in which a torsion spring having two arm portions 431 is applied as the first biasing member 43 is shown. One of the two arm portions 431 is locked to the biasing member locking portion 524 of the neck holder 5, and the other is locked (inserted) to the biasing member locking portion 623 of the fixture 6. Thus, the neck holder 5 and the fixture 6 are relatively biased in the circumferential direction of a circle concentric with the axis of the connecting bolt 41.

  The angle holding pin 44 holds the relative angle between the neck holder 5 and the fixture 6 by fitting into the angle holding hole 72 of the angle holding member 7. Thus, the tilt angle of the motor unit 14 is maintained. The angle holding pin 44 has a rod-like configuration that can be accommodated in the pin accommodation hole so as to be reciprocally movable, and a tip portion thereof has a tapered shape such as a hemisphere or a cone. The second urging member 45 is a member that urges the angle holding pin 44 toward the angle holding member 7 (in a direction of coming out of the angle holding pin housing portion 522). As the second urging member 45, for example, a compression coil spring capable of elastic compression deformation can be applied.

  Next, the assembly structure of the neck 4 will be described.

  A second urging member 45 and an angle holding pin 44 are accommodated in the angle holding pin accommodating portion 522 provided in the connecting portion 52 of the neck holder 5. The angle holding pin 44 accommodated in the angle holding pin accommodation part 522 is urged in the direction of coming out of the angle holding pin accommodation part 522 by the urging force of the second urging member 45. The first urging member 43 is accommodated in the urging member accommodating portion 523 provided in the connecting portion 52 of the neck holder 5. As described above, if the torsion coil spring is applied to the first biasing member 43, one arm portion 431 is locked to the biasing member locking portion 524 provided in the connecting portion 52 (the contact Contact). The other arm portion 431 protrudes radially outward from the connecting portion 52. In the present embodiment, a recess 525 (notch) for avoiding interference with the arm portion 431 of the first biasing member 43 is provided on the end surface of the connecting portion 52 in the axial direction, and the other arm portion is provided. 431 protrudes to the outside of the connecting portion 52 through the recess 525.

  The angle holding member 7 is fitted into the angle holding member engaging recess 621 of the fixture 6. The held portion 74 that is a part of the angle holding member 7 is sandwiched between the wall surface of the angle holding member engaging recess 621 and the angle holding member holding portion 622. Thereby, the angle holding member 7 is held in a state of entering the angle holding member engaging recess 621 and is held in a state of not rotating with respect to the fixture 6. Further, the connection bolt insertion hole 71 provided in the angle holding member 7 and the connection bolt insertion hole 626 provided in the support portions 62a and 62b of the fixture 6 are positioned coaxially.

  The connecting portion 52 of the neck holder 5 is disposed between the two support portions 62 a and 62 b of the fixture 6. That is, the connecting portion 52 of the neck holder 5 is sandwiched between the two support portions 62 a and 62 b of the fixture 6. The neck holder 5 and the fixture 6 are connected to each other so as to be relatively rotatable by the connecting bolt 41 and the nut 42. The connection bolt 41 is provided in the connection bolt insertion hole 626 provided in the two support portions 62 a and 62 b of the fixture 6, the connection bolt insertion hole 71 provided in the angle holding member 7, and the connection portion 52 of the neck holder 5. The connecting bolt insertion hole 521 is inserted. Therefore, in this state, the neck holder 5 and the fixture 6 can be relatively rotated around the axis of the connecting bolt 41.

  One arm portion 431 of the first biasing member 43 is locked to a biasing member locking portion 623 provided on the fixture 6. For this reason, the neck holder 5 and the fixture 6 are urged to the opposite sides in the circumferential direction coaxial with the connecting bolt 41 by the first urging member 43. Due to the urging force of the first urging member 43, the moment about the axis of the connecting bolt 41 due to the weight of the motor unit 14 is reduced. As a result, the force required for changing or holding the vertical direction (tilt angle) of the motor unit 14 is reduced.

  FIG. 6 is a view showing an assembly structure of the neck portion 4, and is a view in which a part of the members constituting the neck portion 4 is cut away. As shown in FIG. 6, the angle holding pin 44 is urged toward the angle holding member 7 by the second urging member 45. The relative angle between the neck holder 5 and the fixture 6 is maintained when the tip of the angle retaining pin 44 enters any one of the plurality of angle retaining holes 72, and the tilt angle of the motor unit 14 is maintained. Is retained. When the tilt angle of the motor unit 14 is changed, an external force in the tilt direction may be applied to the motor unit 14. When an external force in the vertical direction is applied to the motor unit 14, a force (moment) is applied to the neck holder 5 and the fixture 6 to relatively rotate about the axis of the connecting bolt 41. When this force increases, the angle holding pin 44 moves in a direction to enter the angle holding pin housing portion 522 against the urging force of the second urging member 45, and comes out of the angle holding hole 72. The angle holding pin 44 enters the other angle holding hole 72 by rotating the motor unit 14 in the vertical direction. As a result, the tilt angle of the motor unit 14 is changed and the changed tilt angle is maintained. As described above, the plurality of angle holding holes 72 are provided side by side on the circumference of a circle coaxial with the connecting bolt insertion hole 71 of the angle holding member 7. Therefore, when the neck holder 5 and the fixture 6 are rotated relative to each other about the axis of the connecting bolt 41, the angle holding pin 44 can selectively enter any one of the plurality of angle holding holes 72. it can. The angle holding member 7 is provided with two rotation restricting portions 73, and the angle holding pin 44 is located between the two rotation restricting portions 73. For this reason, the neck holder 5 and the fixture 6 are relatively rotatable within a range from the position at which the angle holding pin 44 contacts the one rotation restricting portion 73 to the contact with the other rotation restricting portion 73. . Thus, the two rotation restricting portions 73 restrict the range in which the neck holder 5 and the fixture 6 can rotate relative to each other, that is, the range of the rotation angle in the vertical direction of the motor portion 14.

  Thus, when changing the vertical direction (tilt angle), the force in the rotational direction about the axis of the connecting bolt 41 is applied to the inner peripheral surface of the angle holding hole 72 by the tip of the angle holding pin 44. It moves and moves in contact with each other. Further, even while the angle is held at a predetermined tilt angle, the angle holding pin 44 is formed on the inner peripheral surface of the angle holding hole 72 due to the weight of the motor unit 14 or the urging force of the first urging member 43. Thus, a force in the rotation direction about the axis of the connecting bolt 41 is applied. For this reason, in order to improve the durability of the neck 4, the member provided with the angle holding hole 72 is preferably made of a material that is hard and has high wear resistance. In the present embodiment, the angle holding hole 72 is not provided in the fixture 6 but is provided in the angle holding member 7 made of metal. With such a configuration, the durability of the neck 4 can be improved. Further, when the two rotation restricting portions 73 are provided on the angle holding member 7 made of metal, the strength and durability can be improved as compared with the structure provided on the fixture 6 made of resin. it can. Moreover, since the fixture 6 is formed of a resin material, the degree of freedom in shape can be increased as compared with a configuration formed of a metal plate. Thus, according to the present embodiment, it is possible to improve the strength and durability while increasing the degree of freedom of the design of the neck 4.

  As mentioned above, although embodiment of this invention was described in detail with reference to drawings, the said embodiment only showed the specific example in implementation of this invention. The technical scope of the present invention is not limited to the above embodiment. The present invention can be variously modified without departing from the spirit thereof, and these are also included in the technical scope of the present invention.

  The present invention is a technology effective for electric fans. And according to this invention, the improvement of durability of the neck part of a fan and the improvement of the freedom degree of design can be aimed at.

1: Fan 11: Stand 12: Post (spindle)
14: Motor part 141: Motor 142: Cover member 143: Support pin 15: Front guard 16: Rear guard 17: Blade 18: Power cord 4: Neck part 41: Connecting bolt 42: Nut 43: First biasing member 431 Arm part 44: Angle holding pin 45: Second biasing member 5: Neck holder 51: Motor support part 511: Support pin insertion hole 52: Connection part 521: Connection bolt insertion hole 522: Angle maintenance pin accommodating part 523: Attachment Urging member accommodating portion 524: urging member locking portion 525: (urging member escaping) recess 53: flange portion 6: fixture 601: inner surface 602: outer surface 61: support fixing portion 611: fixing screw insertion hole 62a: Support part 62b: Support part 621: Angle holding member engaging recess 622: Angle holding member holding part 623: Biasing member locking part 625: Nut engaging recess 62 : Connecting bolt insertion hole 7: angular retaining member 71: connecting bolt insertion hole 72: an angle holding hole 73: the rotation regulating portion 74: the held portion

Claims (6)

The structure of the neck of the electric fan that connects the support and the motor part,
The neck is
A fixture attached to the column;
An angle holding member attached to the fixture and provided with a plurality of angle holding holes;
A neck holder attached to the motor part;
An angle holding pin that is movably provided on the neck holder and is biased toward the angle holding member;
Have
The fixture and the neck holder are relatively rotatably coupled, and the angle holding pin enters any one of the plurality of angle holding holes, whereby the neck holder and the fixture And the angle is maintained,
The structure of the neck of the electric fan, wherein the fixture is made of resin, and the angle holding member is made of metal. The fixture has two support portions sandwiching the neck holder,
The said angle holding member is attached to one of the said two support parts, The structure of the neck part of the electric fan of Claim 1 characterized by the above-mentioned. The one of the two support portions is provided with a recess on the surface facing the other of the two support portions,
The structure of the neck portion of the electric fan according to claim 2, wherein the angle holding member is fitted into the concave portion.   The structure of the neck portion of the electric fan according to any one of claims 1 to 3, wherein the fixture is provided with a holding portion that holds the angle holding member.   The structure of the neck part of the electric fan according to claim 4, wherein a part of the angle holding member is held between the one of the two support parts and the holding part.   The said angle holding member is a plate-shaped member, The structure of the neck part of the electric fan of any one of Claim 1 to 5 characterized by the above-mentioned.

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