JPH0629193U - Fan unit - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a fan unit capable of performing fan installation work and replacement work in a short time. A fan unit mounted in a casing (10) having a printed circuit board inside and an opening (20) for mounting a fan, wherein the openings are provided at intervals corresponding to the width of the fan. Of the guide rail and an anchor portion located on the insertion side of the guide rail and near the surface of the casing, and the bracket (30) is a terminal provided in the casing for supplying fan driving power. A connector to be connected, a mesh having a ventilation hole that allows an air flow generated by a fan to pass through, guide groove portions provided on both side surfaces that engage with the guide rail, and when inserted along the guide groove portion, It is characterized by having a latch part that engages with the anchor part and means for fixing the fan (40) to the back side of this mesh.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fan unit used for forced air cooling of an electronic device housing, and more particularly to an improvement that simplifies replacement work during assembly work and maintenance work.

[0002]

[Prior art]

 The applicant has proposed a fan unit in Japanese Utility Model Laid-Open No. 1-86294. As disclosed in Japanese Utility Model Laid-Open No. 63-149215, such a device is attached to the bottom or inside of a casing (cabinet or console) that houses electronic equipment, and external air is taken into the casing to force it. It produces an air flow to cool electronic devices. Since these fans have a limited life, they are regularly replaced every 3 years to ensure reliability.

[0003]

[Problems to be solved by the device]

 However, since the fan is usually screwed on with screws or the like and needs to be covered with a net that protects the fingers from the rotating blades, replacement work takes time. Also, since several fans are installed in one cabinet, the increase in production man-hours and maintenance / replacement time of products cannot be ignored. Especially when maintenance work takes a long time, it is necessary to stop power supply to the cabinet during fan replacement work to prevent heat generation, which impairs continuous operability required for industrial control devices. was there. The present invention solves such a problem, and an object of the present invention is to provide a fan unit that can perform fan installation work and replacement work in a short time.

[0004]

[Means for Solving the Problems]

 The present invention that achieves such an object is a fan unit that is mounted in a casing (10) that houses a printed circuit board inside and that has an opening (20) for mounting a fan. It has a pair of guide rails (21) provided at intervals corresponding to the width and an anchor portion (22) located on the insertion side of the guide rail and near the surface of the casing. The bracket is provided with a connector (31) connected to a terminal for supplying fan driving power provided in the housing, and a mesh (32) having a vent hole through which an air flow generated by the fan passes. Guide grooves (39) provided on both side surfaces that engage with the guide rail, a latch portion (34) that engages with the anchor portion when inserted along the guide groove, and a back side of the mesh. It is characterized by having means (36, 37, 38) for fixing the fan (40) on the side.

[0005]

[Action]

 The bracket forms a fan unit together with the fan, and is attached to the fan opening provided in the housing. At the time of this mounting, the guide rail and the guide groove are aligned to guide the insertion of the fan unit, and the anchor part and the latch part are locked to secure the fixing.

[0006]

【Example】

 The present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view showing an embodiment of the present invention. In the figure, a casing 10 has a box shape for accommodating a printed circuit board therein, and includes a top cover 11, side plates 12 attached to the left and right side surfaces, a front surface 13 having an opening for inserting and removing the printed circuit board, and a rear surface. 14 and a bottom plate is provided. Since both ends of the backboard 15 are restrained by the left and right side plates 12, a bus used for the connected printed circuit board is provided. The connector 16 supplies electric power for operating the fan 30, and is provided independently of a connector (not shown) for a printed circuit board. The guide hole 17 is a through hole provided above the connector 16 of the backboard 15 and guides the mounting of the fan unit. The mounting portion 18 is a sheet metal having an L-shaped cross section provided in the vicinity of the front side of both side surfaces, and is used when the housing 10 is mounted on a large cabinet or the like. The fan openings 20 are provided at two locations on the front side edge of the top cover 11 of the housing 10, and are at the fan mounting position. The guide rails 21 are provided on opposite sides of the upper cover 11 where the fan openings 20 are provided, and serve as guides when the fan unit is inserted from the front side. The anchor portion 22 is provided on one of the opposite sides of the front surface 13 where the fan opening portion 20 is provided, and holds the fan unit.

The bracket 30 is in the shape of a lid for the box, contains the fan 40, and is attached to the fan opening 20. The connector 31 is provided on the back surface of the bracket 30 and is connected to the connector 16. The mesh 32 is a ventilation hole provided on the upper surface of the bracket 30, which secures a path for the forced air flow generated by the fan 40 mounted inside and also serves as a protective material for preventing contact between the fan and foreign matter. work. Here, the mesh 32 is located in a substantially quadrangular range corresponding to the opening area of the fan 40. The latch portion 33 is provided on one edge of the front surface of the bracket 30 and engages with the anchor portion 22.

2A and 2B are configuration diagrams illustrating the details of the bracket 30. FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a side view. The connector protrusion 34 is provided near the connector 31 and is loosely inserted into the guide hole 17 to guide the connection between the connector 31 and the connector 16 smoothly. The holding portion 35 is provided adjacent to the latch portion 33. Since the latch portion 35 is fixed to the side surface of the bracket 30 in a cantilever manner and bends in the direction of the arrow A, the latch portion 35 is finger-mounted. It has the rigidity to catch other fingers when it is bent. The spring stopper 36 is provided on the upper surface of the bracket 30, and is in a state of being recessed toward the fan 40 side in a natural posture. The fan locking claw portions 37 restrain the edges of the fan 40 on the connector 31 side, and are provided on both side surfaces of the bracket 30. The fan holding claw portions 38 restrain the edges of the fan 40 on the latch portion 33 side, and are provided on both side surfaces of the bracket 30. The guide groove portion 39 is provided on the upper surface side edges of both side surfaces of the bracket 30 and substantially the length of the mesh portion 32, and serves as a guide when sliding along the guide rail 21. The guide groove portion 39 is a region sandwiched by two protrusions of an upper guide protrusion 39a and a lower guide protrusion 39b. Since the bracket 30 is molded by using resin here, each protrusion 39a, 39b has 3 to 4 places. It is provided separately.

The mounting of the fan 40 on the bracket 30 will be described. FIG. 3 is a perspective view illustrating a state in which the fan 40 is mounted on the bracket 30. In the figure, the fan 40 has seats 42 provided at the four corners of its frame, and conventionally, the seats 42 were fixed by screws. The connector 43 is connected to the connector 31 to obtain electric power for driving the fan from the backboard 15, and a cable 44 is connected between the connector 43 and the fan 40.

4A and 4B are side sectional views in which the bracket 30 is turned upside down in order to explain the engagement state. FIG. 4A shows the fan 40 before mounting, FIG. Represents When the bracket 30 is turned over and the fan 40 is moved in the direction of arrow B, they come into contact with each other. Then, the spring stopper 36 is pushed by the frame of the fan 40, and is displaced in the direction of arrow C, forming a substantially flush surface with the upper surface of the bracket 30. In this state, the edge of the frame of the fan 40 is restrained by the fan holding claw portion 38, and therefore the back of the upper surface of the bracket 30 is used as a guide to move in the direction of arrow D. Then, the seat portion 42 of the fan 40 stops by stopping against the fan locking claw portion 37, and the connector 31 and the connector 16 are connected. At this time, since the fan does not exist on the spring stopper 36, the restoring force acts to move it near the edge of the fan. Therefore, the return of the fan 40 in the direction of the arrow D'is prevented by the spring stopper 36. When the fan 40 is removed from the bracket 30 for replacement work, the spring stopper 36 is pushed down in the direction of arrow C to return the fan 40 in the direction of arrow D ', and the fan locking claw portion 37 and the fan holding This is done by releasing the engagement with the claw portion 38. In this way, the fan 40 is attached so as to be integrated with the bracket 30 in order to completely prevent the fan 40 from being accidentally detached from the bracket 30.

It should be noted that in the above-described embodiment, the power for driving the fan is supplied using the connector 16 provided on the backboard 15, but a separate connector is provided on the front surface 13 of the housing to supply power to the fan 40. It doesn't matter. In this case, the connector and cable provided on the fan 40 of FIG. 3 are arranged on the side of the latch portion 33. Although the fan opening 20 is formed so that the fan is located on the upper surface of the housing 10, the fan opening may be provided on the back surface or the side surface of the housing.

[0012]

[Effect of device]

 As described above, according to the present invention, the guide rail 21 and the guide groove portion 39 are aligned with each other to guide the insertion of the fan unit, and the anchor portion 22 and the latch portion 33 are locked to each other. Since the fan is attached to the fan opening provided in the housing, there is an effect that the fan installation work and the replacement work can be performed in a short time without the conventional screw tightening work. In addition, when the bracket is attached to the fan as in the embodiment, the fall prevention mechanism is provided, and there is an effect that the fan is prevented from being mistakenly dropped inside the housing and reliability is improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating details of a bracket 30.

FIG. 3 is a perspective view illustrating a state in which a fan 40 is mounted on the bracket 30.

FIG. 4 is a side sectional view in which the top and bottom of the bracket 30 are turned upside down in order to explain an engaged state.

[Explanation of symbols]

 10 Case 20 Fan Opening 30 Bracket 40 Fan

Claims (1)

[Scope of utility model registration request] 1. A fan unit mounted in a housing (10) having a printed circuit board inside and having an opening (20) for mounting a fan, the openings being provided at intervals corresponding to the width of the fan. And a pair of guide rails (21) and anchor portions (22) located on the insertion side of the guide rails and near the surface of the casing.
And a mesh (32) having a connector (31) connected to a terminal for supplying electric power for driving a fan provided in the housing, and a vent hole for passing an air flow generated by the fan.
A guide groove portion (39) provided on both side surfaces for engaging with the guide rail, a latch portion (34) engaging with the anchor portion when inserted along the guide groove portion, and a back side of the mesh. Means (36, 3) for fixing the fan (40) to the
And a bracket (30) having (7, 38), and a fan unit.