JPH0322544B2 - - 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 can be opened and closed using 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 background technology]

However, with the above configuration, it is necessary to provide a slit in the decorative frame that exists between the main body and the decorative board to allow the swing lever to protrude forward, but since the swing movement range of the swing lever is large, it is necessary to provide a slit in the decorative frame. must be made quite long, which poses the problem of poor appearance when the decorative board is opened.

[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, and the opening/closing mechanism does not require the opening of the decorative board at least in the middle of opening the decorative board. a spring that applies an opening force smaller than the force in the closing direction due to its own weight; an operating mechanism that operates the opening/closing mechanism to open the decorative laminate; and a locking mechanism for locking the opening/closing mechanism or the operating mechanism when the opening of the decorative laminate is completed. By providing a locking mechanism for holding the decorative laminate in an open state, the operability of opening and closing the decorative laminate is improved.

[Embodiments of the invention]

1 to 9 for the first embodiment of the present invention.
This will be explained with reference to the figures. 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, and 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 by rotation, the front surface of the main body 1 can be opened and closed. ing. The shaft 11 of the hinge 10 is fixed to the decorative board 9, and the shaft 11 of the left hinge 10 has an arm 1 having a contact 12 at its tip.
3 are integrated. In Figure 3, 1
4 is an opening/closing mechanism, and 15 is a four-bar link mechanism that constitutes the main part thereof. This four-bar link mechanism 1
5 includes a supporting frame 16 corresponding to a first link fixed to the upper left inner surface of the outer frame 2, a pulley 18 corresponding to a second link supported by this supporting frame 16 by a shaft 17, and one end. a connecting rod 20 corresponding to a third link whose portion is connected to the support frame 16 by a shaft 19;
The lever 23, which corresponds to a fourth link, is connected to the outer circumference of the pulley 18 and the other end of the connecting rod 20 by shafts 21 and 22, respectively, at two positions on one end side. In this case, the distance between the axes 17 and 19 and the distance between the axes 21 and 22 are set equal to each other, and the distance between the axes 17 and 21 and the distance between the axes 19 and 22 are set equal to each other. As shown in FIG. 4, the lever 23 is configured to 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 extending diagonally upward is connected to the decorative frame 7.
The contacts 1 are inserted into an opening formed on the left side of the decorative frame 7, such as a slit 24, and protrude toward the front side of the decorative frame 7.
2, or is close to it with a slight gap. Note that 25 is a cover that covers the hinge 10 portion. Reference numeral 26 denotes a single drawstring, and this drawstring 26 constitutes the operating mechanism 27, with one end attached to the pulley 1.
8 and is wound around the outer circumferential groove 18a of the pulley 18.
It is derived downward from . Reference numeral 30 denotes a tension spring tensioned between the support frame 16 and the pulley 18, and when the spring is located below the neutral position, it biases the pulley 18 to rotate in the direction of arrow E, so that the pulley 18 is located above the neutral position. In this case, the pulley 18 is rotated in the direction opposite to the arrow E, which acts as a toggle. This tension spring 30
is set to a spring force such that when the pulley 18 is urged to rotate in the opposite direction of arrow E, the moment exerted on the pulley 18 is slightly smaller than the moment in the closing direction due to the weight of the decorative board 9. Reference numeral 31 denotes a stopper formed on the support frame 16, which is used to abut the connecting rod 20 and restrict the rotation limit position of the pulley 18 in the direction of arrow E. 32 is a normally closed switch attached to the outer frame 2 via a mounting plate 33;
As shown in FIG. 5, this switch 32 opens and closes the energizing path of the motor 4, and is opened and closed by the protrusion 18b provided on the outer periphery of the pulley 18 coming into contact with and separating from the actuator 32a. Reference numeral 34 denotes a locking element of a locking mechanism 35 pivotally mounted on the support frame 16, which engages with an engaging protrusion 18c protruding from one side of the pulley 18 when the pulley 18 rotates by a predetermined angle in the direction of arrow E. This acts to lock the pulley 18. That is, as shown in FIG.
4c, which is supported by a shaft 36 in a loosely fitted state and is biased to rotate in the direction of arrow F along one side of the pulley 18 by a torsion coil spring 37. It is urged to rotate in the direction of arrow G perpendicular to . Then, when the pulley 18 rotates in the opposite direction of arrow E, the engagement protrusion 18c follows the locus shown by arrow H in FIG. 7 relative to the locking element 34, enters into the notch 34b, and is locked. When the pulley 18 rotates slightly in the opposite direction of the arrow E from this state, the engagement protrusion 18c follows the trajectory shown by the arrow J in FIG. 7 relative to the locking element 34 and escapes from the notch 34b to release the lock. Thereafter, as the pulley 18 rotates in the direction of arrow E, it begins to move away from the lock element 34.

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 moves 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 when the decorative plate 9 is opened at a certain angle, it applies a rotational moment to the pulley 18 in the direction that assists the opening of the decorative plate 9, that is, in the opposite direction of the arrow E. (see Fig. 8). After that, by simply pulling the drawstring 26 lightly, the decorative plate 9 will rotate to the fully open position shown in Fig. 9, and at this point the locking element 34 will lock the engagement protrusion 18c. This holds the pulley 18 and thus the decorative panel 9 in its open position. On the other hand, pulley 18
Due to the rotation of the projection 18b, the actuator 32a
The switch 32 closes to energize the motor 4, which drives the blades 3 to rotate and receives the wind pressure to open the shutter 6 to perform ventilation operation. In addition, in this operating state, when the drawstring 26 is pulled down slightly, the pulley 18 rotates slightly in the opposite direction of arrow E, thereby causing the engagement protrusion 18c
is unlocked. Then, the decorative plate 9 rotates in the closing direction while pushing back the lever 23 against the spring force of the tension spring 30 by its own weight, and in conjunction with this, the lever 23 rotates the pulley 18 in the direction of arrow E. It moves diagonally downward in a substantially straight line so as to retreat to its original position. When the tension spring 30 passes through the neutral position, a rotational moment is applied to the pulley 18 in the direction of arrow E, and the opening/closing mechanism 14 returns to its original state where the connecting rod 20 abuts the stopper 31, and the makeup The plate 9 returns to its original closed position and covers the front side of the body 1. On the other hand, at the end of the rotation of the pulley 18, the protrusion 18
b contacts the actuator 32a, the switch 32 is opened and the motor 4 is cut off, and the ventilation operation is thus 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) After the decorative board 9 is opened, the decorative board 9
Since a tension spring 30 is provided to assist in opening,
The decorative board 9 can be opened by simply pulling the drawstring 26 lightly. Moreover, the opening assisting force by the tension spring 30 is set to be slightly smaller than the force in the closing direction due to the weight of the decorative board 9, and the opened decorative board 9 is prevented from naturally rotating in the closing direction due to its own weight. Lock mechanism 3 for
5, when closing the decorative panel 9, all you have to do is slightly pull the drawstring 26 to release the lock, and then the decorative panel 9 will automatically return to the closed position. The opening and closing operation of the plate 9 is excellent.

(3) 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.

(4) Since one link in the four-bar linkage mechanism 15 is constituted by the pulley 18 and the pulley 26 is wound around the pulley 18, the tensile force of the drawstring 26 always acts in the tangential direction of the pulley 18. Good power transmission efficiency.

(5) Since the distance between the axes 17 and 21 and the distance between the axes 19 and 22 are made 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.

(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.

Note that the pulley 18 is always moved in the opposite direction of the arrow E (the decorative plate 9
It may also be configured so that the decorative panel 9 is rotationally biased in the direction in which the decorative panel 9 is opened, so that the opening of the decorative board 9 is assisted from the beginning of opening.

Next, FIGS. 10 to 12 show a second embodiment of the present invention. In FIGS. 10 and 11, 38 is an operating mechanism that connects a wire 39 connected to the pulley 18 to The pulley 18 is rotated in the opposite direction of arrow E by being wound around a take-up roller 42 attached to an output shaft 41 of a motor 40. As shown in the electrical circuit of FIG. 12, the motor 40 is energized by closing a manually operated main switch 43. In FIG. a switch that detects the opening) and cuts off the power to the motor 40;
Reference numeral 45 denotes a magnet, and this magnet 45 attracts the iron piece 46 when energized, activates a one-way clutch (not shown) provided in the motor 40, and prevents the take-up roller 42 from rotating in the opposite direction when the motor 40 is de-energized. acts to prevent And magnet 45
When the one-way clutch is disabled due to a power failure,
As the pulley 18 rotates in the direction of arrow E, the wire 3
9 is rewound.

13 to 19 show a third embodiment of the present invention. In FIG. 13, 47 is a pulley 1.
A drawstring 8 is connected via a tension spring 48 and a wire 49, and 50 is a locking mechanism attached to the outer frame 2. The drawstring 47 is inserted through the locking mechanism 50 and led out downward. The locking mechanism 50 is the drawstring 4
An engaging element 51 that moves up and down together with a sphere 47a fixed to the blade 7 and a switch 52 for the motor 4 of the blade 3 that opens and closes by the up and down movement of the engaging element 51 are provided inside. Reference numeral 53 designates a locking element similar to the locking element 34 of the first embodiment, which is pivotally connected to a shaft 55 together with a torsion coil spring 54, and an engaging protrusion 51a corresponding to the locking element 53 is protruded from the engaging element 51. has been done. Then, when the drawstring 47 is lowered, the state changes from the state shown in FIG. 15 to the state shown in FIG. 16, and as shown in FIG. 17, the engaging element 51 is locked by the lock element 53 and the switch 52 is closed. When the drawstring 47 is pulled again, the state shown in FIG. 18 changes to the state shown in FIG.
Returning to the original state shown in FIG. 5, the switch 52 is opened.

20 and 21 show a fourth embodiment of the present invention, which differs from the third embodiment in the structure of the lock element. That is, in FIGS. 20 and 21, reference numeral 56 denotes a locking element formed of a wire spring, and a substantially heart-shaped locking element is formed on one side of the engaging element 51 corresponding to the bent portion 56a at the tip of the locking element 56. Groove 5
7 is formed. Then, when the engaging element 51 moves downward, the bent portion 56a of the locking element 56 is inserted into the groove 5.
7 to lock the engaging element 51. When the engaging element 51 is pulled down slightly from this state, the bent portion 56a is disengaged from the engaging part 57a, and the locking of the engaging element 51 is released.

〔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 plate is configured to open and close, openings such as slits provided in the decorative frame to allow the lever to protrude forward need only be small. Therefore, when the operation is stopped, the decorative plate can be closed and the front surface can be opened and closed. Of course, it is possible to improve the appearance by covering the decorative plate with a metal cover, and even if the decorative plate is in an open state during operation, there is no risk of damaging the appearance.
In addition, a spring to assist in opening the decorative board and a lock mechanism to hold the decorative board in the open state are provided, so the decorative board can be opened with a light operating force, and once the lock is released, the decorative board can be removed. Since the ventilation fan naturally returns to the closed state under its own weight, it is possible to provide a ventilation fan that has excellent overall operability in opening and closing the decorative panel.

[Brief explanation of the drawing]

1 to 9 show a first embodiment of the present invention, in which FIG. 1 is a vertical side view, FIG. 2 is a perspective view of the decorative frame and decorative board, and FIG. 3 is a vertical cross-sectional view showing the main parts. 4 is a side view of the four-bar link mechanism, FIG. 5 is an electric circuit diagram, FIG. 6 is an enlarged perspective view showing a partially exploded main part, and FIG. 7 is a side view of the locking element. 8 and 9 are longitudinal sectional side views of the main parts of the decorative board shown in a half-opened state and a fully opened state, respectively, and FIGS.
2 shows a second embodiment of the present invention, FIG. 10 is a vertical cross-sectional side view of the main part with a part cut away, FIG. 11 is an enlarged perspective view of the operating mechanism, FIG. 12 is an electric circuit diagram, and FIG. 13 to 19 show a third embodiment of the present invention, FIG. 13 is a view corresponding to FIG. 3, FIG. 14 is an enlarged exploded perspective view of the lock mechanism, and FIGS. 15 to 19 are views of the lock and its Vertical cross-sectional views showing the release process in order,
FIGS. 20 and 21 are longitudinal cross-sectional views showing a fourth embodiment of the present invention, with the lock mechanism cut in different directions. In the figure, 1 is the main body, 7 is a decorative frame, 14 is an opening/closing mechanism, 18 is a pulley, 23 is a lever, 24 is a slit (opening), 26 is a drawstring, 30 is a tension spring, 3
4 is a lock element, 35 is a lock mechanism, 38 is an operating mechanism, 39 is a wire, 40 is a motor, 42 is a take-up roller, 47 is a drawstring, 50 is a lock mechanism, 51 is an engaging element, 52 is a switch, 53, 56 is a lock child.

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. an opening/closing mechanism that includes a lever that moves to open and close the decorative plate by forward and backward movement of the lever; an opening formed in the decorative frame through which the lever is inserted; and at least an opening of the decorative plate with respect to the opening/closing mechanism. a spring that applies a force in the opening direction that is smaller than a force in the closing direction due to the own weight of the decorative laminate after the middle; an operating mechanism that operates the opening/closing mechanism to open the decorative laminate; A ventilation fan comprising a locking mechanism that locks the opening/closing mechanism or the operating mechanism to hold the decorative panel in an open state. 2. Claim 1, wherein the opening/closing mechanism includes a pulley, the operating mechanism includes a drawstring wound around the pulley, and the locking mechanism is configured to lock the pulley. Ventilation fan described in. 3. The ventilation fan according to claim 1, wherein the operating mechanism is configured to operate the opening/closing mechanism by winding the wire around a winding roller rotationally driven by a motor. . 4. The operating mechanism is composed of a drawstring connected to the opening/closing mechanism, and the locking mechanism is provided with a switch that locks the drawstring and starts ventilation operation in response to the locking operation. A ventilation fan according to claim 1.