JP3535385B2 - Remote control device with built-in sound device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device having a built-in acoustic device such as a speaker and a buzzer, and can be used as a remote control device for a bathroom, for example.

[0002]

2. Description of the Related Art There is a bathroom remote control device having a structure as shown in FIG. 4 for informing the completion of bath filling by a voice or music from a built-in speaker. The casing (A) of the remote control device is composed of a rectangular plate-shaped base (2) and a box-shaped surface cover (1) that covers the front surface of the base, and a switch ( 41) ON / OF
An operation unit (16) for making F is provided.

On the other hand, through holes (14) and (14) are formed on the wall surface below the operating portion (16) of the front surface lid (1), and the back side of the through holes (14) and (14). A speaker (3) as an acoustic device is installed in this. The outer periphery (33) of the speaker (3) is pressed against an annular packing (31) that abuts the surface lid (1) so as to surround the entire area where the through holes (14) (14) are formed. Thereby, the outer periphery of the speaker (3) is pressed against the surface lid (1) in a watertight manner via the annular packing (31).
That is, the outer peripheral portion (33) of the speaker (3) which is in contact with the annular packing (31) is configured to be fastened with the screws (36) and (36) via the metal pieces (35) and (35).

In this case, since the sound from the speaker (3) passes through the through holes (14) and (14), the sound is not trapped in the casing (A) and the deterioration of the notification performance is prevented. You can Further, since the annular packing (31) for ensuring watertightness is interposed between the outer peripheral portion (33) of the speaker (3) and the surface lid (1), the through holes (14) (14) Water and water vapor entering from the inside are blocked by the annular packing (31) and do not come into contact with the electronic parts and the like in the casing (A), and the electronic parts and the like are protected from moisture.

[0005]

However, in the above-mentioned conventional one, the speaker is driven by the tightening force of the plurality of screws (36) (36).
Since the outer peripheral part (33) of (3) is pressed against the annular packing (31), if there is variation in the tightening force of these screws (36), (36), the entire outer peripheral area of the speaker (3) will be evenly packed. It cannot be pressed against (31) and requires skill in the work. If there is a portion where the pressing force on the outer circumference of the speaker (3) against the annular packing (31) is weak, the watertightness of the portion becomes insufficient and water leakage occurs, or the portion vibrates in small steps, which is so-called chattering. A specific inconvenience that sound is generated occurs.

As described above, the above-mentioned conventional device has a problem that the work of pressing the entire outer circumference of the speaker (3) uniformly against the annular packing (31) requires skill and its workability is poor. It was In addition, in the above-mentioned conventional one, the speaker (3)
Although the remote control device incorporating the above is described, it goes without saying that a remote control device incorporating a buzzer of a type that vibrates a piezoelectric element has the same problem.

The present invention has been made in view of the above points, and the work of assembling the speaker (3) can be easily performed while pressing the entire circumference of the speaker (3) against the annular packing (31). The task is to do so.

[0008]

[Means for Solving the Problems] The technical means of the present invention for solving the above-mentioned problems include: a casing (A) having a sound wave transmission region in which a through hole penetrating a constituent wall is formed; An annular packing (31) that abuts the inner surface of the casing (A) so as to surround the permeation region, and a vibrating body that gives vibration to air is surrounded by the annular packing (31). On the other hand, a casing (A) an acoustic device such as a speaker or a buzzer that is contacted from the inside, and a pressing spring that presses the acoustic device from the side opposite to the annular packing (31) toward the annular packing (31). And a spring receiving body that holds the pressing spring in cooperation with the acoustic device by receiving an elastic return force of the pressing spring that is generated by pressing the acoustic device. The center of gravity of the acoustic device due to each pressing force at this contact As the sum of the rotational moment acting becomes 0, and sets the position of the contact point "it is.

According to the above-mentioned technical means, the acoustic device is brought into contact with the annular packing (31) and the pressing spring is urged between the rear face of the acoustic device and the spring receiving body as in the conventional device. Insert in the state. Then, the elastic return force of the pressing spring is received by the acoustic device and the spring receiving body, whereby the pressing spring is clamped by the acoustic device and the spring receiving body. Further, in this state, the sum of the rotational moments acting on the center of gravity of the acoustic device due to the pressing forces at the contact points of the acoustic device and the pressing spring becomes 0, so that the acoustic noise is applied to the annular packing (31). The vessels are pressed in parallel,
As a result, the acoustic device is pressed uniformly over the entire circumference of the annular packing (31).

[0010]

According to the above-mentioned technical means, the annular packing is simply provided by interposing the pressing spring between the acoustic device and the spring receiving body.
Since the acoustic device can be pressed uniformly over the entire circumference of (31), the acoustic device can be used in comparison with the previously described conventional one that required skill to tighten the screws (36) (36). Can be easily assembled. Further, since the acoustic device can be uniformly pressed over the entire circumference of the annular packing (31), the above-mentioned water leakage and so-called chattering noise caused by the presence of the weak pressing force can be prevented. can do. [Others] * a In the above invention, in order to make the sum of the rotational moments acting on the center of gravity of the acoustic device due to each pressing force at the contact point of the acoustic device and the pressing spring zero, Is provided with a plurality of convex portions, and the plurality of convex portions is the annular packing.
It is possible to adopt a configuration in which the acoustic device is in contact with the acoustic device at an equal pitch on a circumference centered on a central axis passing through the center of gravity and extending perpendicular to a plane parallel to (31).

Item * b "The pressing spring has a shape in which an elastic wire is curved in a U shape, and the convex portion is provided on each of two sides following the curved portion at one end of the U-shaped pressing spring. In this case, the pressing spring can be manufactured only by bending one elastic wire.

* C Item In addition to adopting a U-shaped curved elastic wire as a pressing spring as in the above item (b), "the pressing spring is a single leaf spring" can be used. is there.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic vertical cross-sectional view of a remote controller for a water heater according to an embodiment of the present invention, which includes a rectangular plate-shaped base (2) and a rectangular box-shaped surface lid (1) covering the front part thereof. The casing (A) is composed of electronic components such as a switch (41) and a speaker (3).

[Regarding the casing (A)] * Regarding the base (2) The base (2) of the casing (A) is formed in a rectangular plate shape, and the surface lid (1) is provided in the vicinity of the outer periphery of the base (2). A pair of elastic engaging pieces (21) (21) projecting to the side project. * About the surface lid (1) The surface lid (1) covering the front part of the base (2) is formed in a rectangular box shape, and the operation part (16) above the surface lid (1) is By forming a meandering slit (19) on the wall surface, a flexible region (12) is formed so as to be easily bent when the user performs a pressing operation. Further, the surface of the flexible region (12) is covered with a flexible decorative sheet (10), and the switch (41) is turned on / off by a protruding shaft (120) protruding from the flexible region (12). It is supposed to be done. The switch (41) is provided on the substrate (43) and the substrate (43)
Is fixed with screws (46) (46) to the legs (45) (45) protruding from the back surface of the surface lid (1).

The inner surface of the surface lid (1) has the above-mentioned base.
The engaging arms (13) and (13) that engage with the elastic engaging pieces (21) and (21) of (2) are protruding, and when the surface lid (1) is pressed against the front surface of the base (2), The arms (13) (13) and the tip engaging portions of the elastic engaging pieces (21) (21) engage with each other to couple the surface lid (1) and the base (2). [Regarding Placement of Speaker (3)] Below the operation part (16), there is a sound wave transmission area (through which the through holes (14), (14) group penetrating the constituent wall of the surface lid (1) is formed. 18) is located, and a speaker (3) is incorporated on the back side of the sound wave transmission region (18).
Therefore, the sound generated from the speaker (3) passes through the through holes (14) and (14) group of the sound wave transmitting region (18) and is transmitted to the outside with almost no attenuation.

As shown in FIGS. 1 and 3, the above-mentioned speaker
(3) is a substantially circular dish-shaped speaker case (32), a film-shaped vibrating body (38) stretched in its open part, and an electric signal for vibrating the vibrating body (38) by an input electric signal. A vibration converter (34). Further, the outer peripheral portion (33) of the outer peripheral flange (320) of the speaker case (32) is bent to one side, whereby an annular insertion for inserting into an annular groove (30) of an annular packing (31) described later. A piece (37) is formed.

On the inner surface of the surface lid (1), the sound wave transmission area (18) is formed.
A circular annular rib (11) surrounding the ridge is raised, and a circular annular packing (31) having an outer diameter corresponding to the inner diameter of the annular rib (11) is loaded inside thereof. ing. An annular groove (30) is formed on the surface of the annular packing (31) on the speaker (3) side, and the annular groove (30) is bent from the outer peripheral portion (33) of the speaker (3). The annular insert (37) is adapted to be inserted. Therefore, the annular plug (3
7) is inserted into the annular groove (30), the speaker
The vibrating body (38) provided in (3) for vibrating the air is surrounded by the annular packing (31). In this one,
By inserting the annular insertion piece (37) into the annular groove (30) of the annular packing (31) in a watertight manner, these annular packings (3)
The 1) and speaker (3) are connected with high water tightness.

An annular rib (1) accommodating the speaker (3)
As shown in FIGS. 1 and 2, on the outside of 1), a first engaging claw (52) having a fishhook-like engaging portion (51) at the tip, and a speaker
A pair of second and third engagement claws (53) and (54) located on the opposite side of the first engagement claw (52) with the arrangement portion (3) interposed therebetween are provided. The tips of the third engaging claws (53) (54) are formed with engaging bent portions (530) (540) that are bent in opposite directions. In this embodiment, the first to third engaging claws (52), (53) and (54) correspond to the spring receiving body described above. The middle point of the second and third engaging claws (53) (54) is the speaker (3) when the speaker (3) is viewed from the back side (the side opposite to the vibrating body (38)). ) Is located on a straight line connecting the center point of the center of gravity and the first engaging claw (52). That is, the intermediate point and the first engaging claw (5
Line L connecting 2) is speaker (3) and ring packing (31)
It is configured to pass on the diameter line of.

The speaker (3) is configured to be pressed from the back side by a holding spring (6) formed by bending an elastic wire into a U shape. That is, the presser spring (6) has the first and second sides.
(61) (62) is bent and formed in a U-shape having a connecting part (65) for connecting one end thereof to each other, and the first and second sides (61)
(62) The mutual distance is slightly widened as the distance from the connecting portion (65) increases. And the first and second sides (61) (62)
In the middle, the first and second bending protrusions (67) (68) are formed by bending the speaker (3) side in a V shape, and the first and second bending protrusions (67) are formed. (68) The above-mentioned “convex portion that abuts the acoustic device” is formed by (68).

The connecting portion (65) of the pressing spring (6) is engaged with the fishhook-like engaging portion (51) of the first engaging claw (52), and the first and second sides (61) (62) are engaged. ) Is the engaging bent portion of the second and third engaging claws (53) (54)
When engaged with (530) and (540), as shown in FIG. 3, at the same distance H from the center point (a) (the point where the center axis of the annular packing (31) passes) on the back surface of the speaker (3). Points to the first and second protrusions (6
7) (68) presses. Then, the speaker (3) and the presser spring
The sum of the rotational moments acting on the center of gravity G of the speaker (3) by the pressing forces P, P at the contact point with (6) is 0.
As a result, the entire area of the outer peripheral portion (33) of the speaker (3) is uniformly pressed against the annular packing (31). Also, the presser spring
Since the speaker (3) can be fixed only by engaging the (6) with the first to the third engaging claws (52), (53) and (54),
(3) Assembly work can be done easily. [Others] In the above-described embodiment, the pressing spring bent in a U shape.
Although (6) is used, a single rod-shaped spring whose central portion is bent in a “<” shape toward the speaker (3) can be used as the holding spring (6). In this case, by pressing the center point (a) on the back surface of the speaker (3) with the tip of the V-shaped bent portion, the entire outer peripheral portion (33) of the speaker (3) is covered with an annular packing ( 31) can be pressed uniformly. In this case, it is necessary to bend the rod-shaped spring into an appropriate shape so that the V-shaped bent portion does not fall. For example, the spring is bent in a Z shape in which three sides are continuous, and the V-shaped bent portion is formed to project in a direction perpendicular to a plane including these three sides. Then, the two sides at both ends are lengthened, and these two sides are
The two engaging portions having the same structure as the hook-shaped engaging portion (51) appearing in FIG. With this configuration, the long two sides engage with the engaging portion to prevent rotation of the spring (prevention of collapse of the V-shaped bent portion). A leaf spring having a protrusion that abuts the back surface of the speaker (3) may be used as the pressing spring (6).

When a single protrusion is provided, by pressing the center point (a) on the back surface of the speaker (3) with this protrusion,
The entire outer peripheral portion (33) of the speaker (3) can be uniformly pressed against the annular packing (31). In the case of providing three protrusions, the protrusions are arranged so as to be located at the vertices of an equilateral triangle, and the protrusions 120 are arranged along the circumference centered on the center point (a) of the back surface of the speaker (3). Press the back of the speaker (3) at intervals.

Similarly, protrusions are formed at the respective vertices of the regular polygon, and the rear surface of the speaker (3) is evenly spaced along the circumference centered on the center point (a) of the rear surface of the speaker (3). By pressing, the outer circumference of the speaker (3) may be pressed uniformly against the annular packing (31). Although the speaker (3) is adopted as the acoustic device in the above-described embodiment, a buzzer of a piezoelectric element type or a buzzer of a type in which an iron piece is vibrated by an electromagnet may be used instead.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a remote controller for a water heater according to an embodiment of the present invention.

FIG. 2 is a perspective view of an arrangement portion of an arrangement portion of a speaker (3).

FIG. 3 is a vertical cross-sectional view of the speaker (3)

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of symbols]

(1) ・ ・ ・ Surface lid (6) ... Presser spring (31) ・ ・ ・ Ring packing (A) ・ ・ ・ Casing

Claims (4)

(57) [Claims] 1. A casing (A) having a sound wave transmission region in which a through hole penetrating a constituent wall is formed, and an annular packing (31) abutting the inner surface of the casing (A) so as to surround the sound wave transmission region. And an acoustic device such as a speaker or a buzzer that is abutted from the inside of the casing (A) with respect to the annular packing (31) so that the vibrating body that gives vibration to the air is surrounded by the annular packing (31). From the side opposite to the side of the annular packing (31), the annular packing (3
1) A pressing spring that presses the acoustic device toward, and a spring receiver that clamps the pressing spring in cooperation with the acoustic device by receiving the elastic return force of the pressing spring that is generated by pressing the acoustic device. The body is provided, and the position of the abutting point is set so that the sum of the rotational moments acting on the center of gravity of the aforesaid acoustic device due to each pressing force at the abutting point of the acoustic device and the pressing spring becomes zero. A remote control device with a built-in sound device. 2. The presser spring comprises a plurality of convex portions, the plurality of convex portions extending about a central axis extending perpendicularly to a plane parallel to the annular packing (31) and passing through the center of gravity. The remote control device with a built-in acoustic device according to claim 1, wherein the remote device is in contact with the acoustic device at an equal pitch on the circumference. 3. The presser spring has a shape in which an elastic wire is curved in a U shape, and a bend that becomes the convex portion on each of two sides following the curved portion at one end of the U-shaped presser spring. The remote control device with a built-in acoustic device according to claim 2, wherein a protrusion is formed. 4. The remote control device with a built-in acoustic device according to claim 1, wherein the pressing spring is formed of a leaf spring.