JPH0321818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a ventilation fan in which the front surface of a main body equipped with a decorative frame is opened and closed by a decorative board.

[Technical background of the invention]

In this type of ventilation fan, the main body is provided with a swing lever that is operated by a drawstring, and the tip of the swing lever is slid into contact with a decorative panel that is supported so as to be able to open and close. A structure has been considered in which the decorative panel is opened and closed by pushing and pulling it by turning a turning lever.

[Problems with the Background Art] However, with the above configuration, a slit must be provided in the decorative frame between the main body and the decorative board to allow the swing lever to protrude forward, but the range of swing movement of the swing lever is limited. Because of the large size, the slit provided in the decorative frame must be quite long, which creates a problem that the appearance of the decorative board when opened is poor.

[Purpose of the invention]

Therefore, an object of the present invention is not only to improve the appearance by closing the decorative plate when the operation is stopped, but also to cover the front surface with the decorative plate, and also to make the lever for opening and closing the decorative plate protrude to the front side. To provide a ventilation fan which requires only a small opening such as a slit provided in a decorative frame and which does not damage the appearance even when the decorative board is opened during operation.

[Summary of the invention]

The present invention provides an opening/closing mechanism provided with a lever that moves substantially linearly in the direction of advancing forward and in the direction of retreating to the original position on the main body, and opens and closes the decorative panel by moving the lever forward and backward. With this structure, an opening such as a slit provided in the decorative frame to allow the lever to protrude forward can be made small.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. 1 and 2, 1 is a main body built into the chamber wall, and 2 is its outer frame. A well-known blower 5 consisting of blades 3 and a motor 4 is disposed within the outer frame 2, and a wind pressure release type shutter 6 is disposed on the rear surface of the outer frame 2 so as to be openable and closable. . Reference numeral 7 denotes a decorative frame having a bell mouth 8 in the center thereof, and is detachably attached to the front surface of the outer frame 2 by fitting. 9 is a decorative board,
As shown in FIG. 3, both sides of the upper end are rotatably attached to the upper front surface of the decorative frame 7 by hinges 10, and the front surface of the main body 1 can be opened and closed by rotation. The shaft 11 of the hinge 10 is fixed to the decorative board 9, and the shaft 11 of the left hinge 10 is integrally provided with an arm 13 having a contact 12 at its tip. In FIG. 3, 14 is an opening/closing mechanism, and 15 is a four-bar link mechanism that constitutes the main part thereof. This four-bar linkage mechanism 15 is connected to the outer frame 2
a support frame 16 corresponding to a first link fixed to the upper left inner side surface of the support frame 16; a pulley 18 corresponding to a second link supported by this support frame 16 by a shaft 17;
A third one whose one end is connected to the supporting frame 16 by a shaft 19.
a connecting rod 20 corresponding to a link, and a lever 23 corresponding to a fourth link whose two points on one end side are connected to the outer periphery of the pulley 18 and the other end of the connecting rod 20 by shafts 21 and 22, respectively. It is configured. In this case, the distance between axes 17 and 19 and the axis 21
and 22 are set to be equal to each other, and the distance between axes 17 and 21 and the distance between axes 19 and 22 are set to be equal to each other, and as shown in FIG.
The lever 23 is configured so that the straight line A connecting the shafts 17 and 22 and the lever 23 move substantially linearly while always remaining parallel to the straight line B connecting the shafts 17 and 19. Further, the distance between the axes 17 and 21 and the distance between the axes 19 and 22 are set equal to the length l of the arm 13, and the straight lines C and D connecting the respective axes are parallel to the arm 13. The shaft 11 is located on the straight line B, and the contact 12 is located on the straight line A. The tip of the lever 23, which extends obliquely upward, is inserted into an opening, for example, a slit 24, formed on the left side of the decorative frame 7, and protrudes toward the front side of the decorative frame 7, so that it touches or slightly touches the contact 12. They are close together with a large gap between them. In addition, 2
5 is a cover that covers the hinge 10 portion. 26 and 27 are two draw strings, one end of which is connected to the pulley 18 and wound around the outer circumferential groove 18a of the pulley 18 in opposite directions.
The other end is extended over rollers 28 and 29 pivotally mounted on the outer frame 2 and led out from the decorative frame 7 downward. Reference numeral 30 denotes a tension spring stretched between the supporting frame 16 and the pulley 18, which rotates the pulley 18 in the direction of arrow E when the spring is located below the neutral position shown in FIG. When the force is present above, it acts as a toggle to urge the pulley 18 to rotate in the opposite direction of arrow E. This tension spring 30 is connected to the pulley 1
When applying rotation force in the opposite direction of arrow E of 8, pulley 1
The spring force is set such that the moment exerted on the decorative plate 8 is equal to or slightly larger than the moment in the closing direction of the decorative plate 9. Reference numeral 31 denotes a stopper formed on the supporting frame 16, and the connecting frame 20 is brought into contact with the pulley 1.
This is for regulating the rotation limit position of 8 in the direction of arrow E. 32 is a normally closed switch attached to the outer frame 2 via a mounting plate 33;
2 opens and closes the energizing path of the motor 4, as shown in FIG. 5, and opens and closes when a protrusion 18b provided on the outer periphery of the pulley 18 comes into contact with and leaves the actuator 32a. Reference numeral 34 denotes an elastic engager fixed to the support frame 16, which has the effect of engaging with a notch 35 formed on the outer periphery of the pulley 18 and locking the pulley 18 when the pulley 18 rotates by a predetermined angle in the direction of arrow E. to do.

Next, the operation of the above configuration will be explained. First, as shown in FIGS. 1 and 3, it is assumed that the ventilation fan is in a stopped state and the decorative board 9 covers the front surface. When the drawstring 26 is pulled down from this state, the pulley 18 rotates in the opposite direction of arrow E against the spring force of the tension spring 30, and the lever 23 advances forward from the decorative frame 7. The decorative plate 9 is rotated in the opening direction by moving diagonally upward substantially linearly, pushing up the contact 12 at its tip. When the tension spring 30 passes through the neutral position (this process is shown in FIG. 6), it applies a rotational moment to the pulley 18 in the opposite direction of arrow E.
Thereafter, by simply pulling the drawstring 26 lightly or by the spring force of the tension spring 30, the decorative plate 9 will rotate naturally to the fully open position shown in FIG. At the same time, the pulley 18 and thus the decorative plate 9 are locked in that position. On the other hand, as the pulley 18 rotates, the protrusion 18b separates from the actuator 32a, so the switch 32 closes and energizes the motor 4, which drives the blade 3 to rotate and opens the shutter 6 under the wind pressure. Ventilation operation is carried out. Also, in this operating state, when the drawstring 27 is pulled down, the elastic engager 34
The lock caused by the pulley 18 is released and the tension spring 3
The lever 23 rotates in the direction of the arrow E against the spring force of 0, and along with this, the lever 23 moves diagonally downward in a substantially straight line so as to retreat to its original position, and the decorative plate 9 follows this movement. It rotates in the closing direction due to its own weight.
When the tension spring 30 passes through the neutral position, it applies a rotational moment in the direction of arrow E to the pulley 18, so that even if you release your hand from the pull string 27, the pulley 18 will move from the connecting rod 20 to the stopper 3.
Turn lever 2 in the direction of arrow E until it touches lever 1.
3 is retreated to its original position, and accordingly, the decorative plate 9 returns to its original closed position and covers the front surface of the main body 1. On the other hand, at the end of the rotation of the pulley 18, the protrusion 18b comes into contact with the actuator 32a, so the switch 32 is opened and the motor 4 is cut off.
Ventilation operation is then stopped.

According to the above configuration, the following effects can be obtained.

(1) Although the lever 23 makes a translational movement that rotates slightly in the vertical direction, the lever 23 as a whole moves approximately linearly along its longitudinal direction. The slit 24 formed in the frame 7 can be short. Therefore, the appearance of the decorative frame 7 is not impaired, and the appearance is good even when the decorative board 9 is in the open state.

(2) Since the lever 23 is moved substantially linearly by the four-bar link mechanism 15, the opening/closing mechanism 14 can be easily configured with a small number of parts.

(3) Since one link of the four-bar link mechanism 15 is constituted by the pulley 18, and the pulleys 26 and 27 are wound around the pulley 18, the tensile force of the drawstrings 26 and 27 is always in the tangential direction of the pulley 18. , and has good force transmission efficiency.

(4) Since the distance between the axes 17 and 21 and the distance between the axes 19 and 22 are equal to the length l of the arm 13, and the contactor 12 and the axis 11 are located on the straight lines A and B, respectively, the contact child 12 is lever 23
It comes into contact with the tip of the lever 23 at a substantially fixed position, so there is no risk of it coming off even if the lever 23 is narrow.

(5) Since the tension spring 30 which has a toggle effect is provided, the drawstring 26 can be easily operated especially when the decorative panel 9 is opened.

(6) Since the decorative board 9 is attached to the decorative frame 7 that is removably attached to the outer frame 2, the decorative frame can be easily removed from the main body 1 even if the main body 1 is installed in a high place on a room wall. Decorative board 9 can be removed by removing 7.
can be easily removed, so that the decorative board 9 can be easily removed.
Cleaning can also be carried out sufficiently at an appropriate cleaning location.
In addition, in the case where the decorative board was attached directly to the main body without providing a decorative frame, the entire inside of the main body was exposed to the outside when the decorative board was opened, which caused problems such as poor appearance, but in this example, When the decorative board 9 is opened, the decorative frame 7 can prevent the entire interior of the main body 1 from being exposed.

(7) Since the switch 32 is provided to open and close the energizing path of the motor 4 by connecting and separating the protrusion 18b of the pulley 18, operation can be performed and stopped in conjunction with opening and closing of the decorative board 9, and the operation is simple.

〔Effect of the invention〕

As is clear from the above description, the present invention is provided with an opening/closing mechanism provided with a lever that moves approximately linearly in the direction of advancing forward and in the direction of retreating to the original position on the main body, and by the forward and backward movement of the lever. Since the decorative panel is configured to open and close, openings such as slits provided in the decorative frame to allow the lever to protrude forward can be made small. Therefore, when the vehicle is stopped, the decorative frame can be closed to open and close the front surface of the decorative panel. It is possible to provide a ventilating fan that not only can improve the appearance by covering the ventilation fan but also has no risk of deteriorating the appearance even when the decorative plate is in an open state during operation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a vertical sectional side view, FIG. 2 is a perspective view of a decorative frame and decorative board, FIG. 3 is a vertical sectional side view showing the main parts, and FIG. FIG. 5 is a side view of the four-bar linkage mechanism, FIG. 5 is an electric circuit diagram, and FIGS. 6 and 7 are longitudinal sectional side views of the main parts shown with the decorative board in a half-open state and a fully open state, respectively. In the figure, 1 is the main body, 7 is a decorative frame, 9 is a decorative board, 1
4 is an opening/closing mechanism, 15 is a four-bar link mechanism, 18 is a pulley, 23 is a lever, 24 is a slit (opening),
26 and 27 are drawstrings.

Claims (1)

[Scope of Claims] 1. The front surface of the main body to which the decorative frame is attached is opened and closed by a decorative board, and the main body has a substantially straight line in the direction of advancing forward into the main body and the direction of retreating to the original position. The ventilation fan is provided with an opening/closing mechanism equipped with a lever that moves, and the decorative frame is provided with an opening through which the lever is inserted, and the decorative plate is opened and closed by forward and backward movement of the lever. 2. The ventilation fan according to claim 1, wherein the lever is configured to move substantially linearly by a four-bar link mechanism. 3. The ventilation fan according to claim 2, wherein one link of the four-bar linkage mechanism is constituted by a pulley, and a pull string for operation is wound around the pulley.