JP3880484B2 - Sensor fixing part structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a sensor fixing portion, and more particularly to a structure of a sensor fixing portion improved so as to ensure good attachment / detachment workability even when a work area on the back surface is narrow.
[0002]
[Prior art]
There is known a male urinal provided with a human body detection sensor S for automatically flowing out washing water in accordance with contact and separation of a human body (see FIG. 4).
[0003]
The urinal to which the human body sensor S is attached is made of porcelain that does not work with a tapping screw and may cause cracking if the screw inserted in the hole that has been opened in advance is tightened too much. It was difficult. Also, since the work area on the back side cannot be made sufficiently large, replacement work such as when a sensor breaks down tends to be troublesome.
[0004]
[Problems to be solved by the invention]
The present invention has been devised in order to solve such problems of the prior art, and its main purpose is that it can be attached to the mounted body relatively easily and the work area is narrow. Another object of the present invention is to provide an improved sensor fixing portion structure that can ensure good detachability.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, in claim 1 of the present invention, there is provided a sensor body (1) having a first engagement portion (projection 23) and a second engagement portion (projection 14) on the outer surface thereof. A decorative plate (8) having an elastic engagement piece (24) that engages with the first engagement portion and abutting against the front surface of the mounted body (3), and a receiving portion (13) for receiving the sensor body ) And an elastic engagement piece (14) that engages with the second engagement portion, and a sensor holder (5) that is fixed to the attached body, and the elastic engagement piece of the sensor holder includes: It is always possible to forcibly bend the direction of disengagement from the second engaging portion, and the elastic engaging piece of the decorative plate can be attached to the inner surface of the receiving portion and the sensor when the sensor main body is attached to the receiving portion. The sensor fixing part is characterized in that it is sandwiched between the outer surface of the main body and cannot be deformed. It was decided to provide.
[0006]
In this way, if the sensor main body is pushed into the receiving portion of the sensor holder while the elastic engagement piece of the decorative plate is engaged with the sensor main body, the elastic engagement piece of the sensor holder is engaged with the sensor main body. The decorative plate and the sensor body are coupled to the sensor holder.
[0007]
In the state where the sensor body is attached, the elastic engagement piece of the decorative plate exposed on the front surface of the attached body cannot be bent, so the decorative plate cannot be removed from the attached body. Reliable fixing with respect to a to-be-attached body is attained.
[0008]
To remove the sensor body from the sensor holder, if the elastic engagement piece of the sensor holder is bent from the back side of the mounted body, the engagement with the sensor body is released. The sensor body with the decorative plate engaged can be easily separated from the sensor holder. If it is removed from the sensor holder, the elastic engagement piece of the decorative plate can be bent, so that the sensor body and the decorative plate can be separated from each other.
[0009]
In particular, a flange (12) that contacts the front surface of the mounted body is formed on the sensor holder, and the mounted body is sandwiched between the flange and a back plate (7) that contacts the back surface of the mounted body. If the screw (tapping screw 6) is screwed onto the back plate from the front of the sensor to fix the sensor holder to the mounted body (Claim 2), the sensor holder can be securely mounted without increasing the load on the mounted body. Can be fixed.
[0010]
Further, if the sensor is applied to the human body sensor (S) provided on the front surface of the male urinal (Claim 3), it is possible to reduce the number of manufacturing steps for the self-cleaning urinal.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0012]
1 to 3 show a sensor main body and its fixture constructed according to the present invention. The sensor body 1 is, for example, a human body sensor S provided in a male urinal described in the section of the prior art, and a fixture 2 for fixing the sensor body 1 to, for example, a ceramic body is shown in FIG. As shown in FIG. 4, the sensor holder 5 mounted from the front in the mounting hole 4 provided in the mounted body 3 and the back surface of the mounted body 3 are brought into contact with the tapping screw 6 (see FIG. 2) includes a back plate 7 for fixing the sensor holder 5 to the mounted body 3 by screwing, and a decorative plate 8 that contacts the front surface of the mounted body 3 in order to hide the front surface of the sensor holder 5. Yes. In addition, the protective glass 11 is attached to the sensing window 9 provided in the center part of the decorative plate 8 through the seal member 10 (FIGS. 2 and 3).
[0013]
The sensor holder 5 includes a flange 12 that comes into contact with the front surface of the mounted body 3 and a sensor receiving portion 13 that has a generally rectangular tube shape. At the center in the left-right direction of the upper wall of the sensor receiving portion 13, an elastic engagement that can be bent in the vertical direction so as to be engaged with a protrusion 14 (second engagement portion) provided on the upper surface of the sensor body 1. The joining piece 15 is formed to project in the horizontal direction. An elastic piece 16 for applying a pressing force upward is formed at the center in the left-right direction of the lower wall. Further, a retaining projection 17 that can be engaged with the back plate 7 is formed at the rear edge of the upper and lower walls, and an insertion portion 18 for the tapping screw 6 is formed on the left and right side walls.
[0014]
The back plate 7 is formed with a flange 19 that contacts the back surface of the mounted body 3, an opening 20 through which the sensor receiving portion 13 of the sensor holder 5 is inserted, and a boss portion 21 into which the tapping screw 6 is screwed. .
[0015]
The decorative plate 8 has a seal member 10 and a mounting portion 22 for the protective glass 11 formed on the back surface thereof. The left and right sides of the mounting portion 22 of the seal member 10 and the protective glass 11 are bent in the left-right direction so as to be elastically engaged with the protrusions 23 (first engaging portions) formed on both side surfaces of the sensor body 1. A possible elastic engagement piece 24 is formed protruding backward.
[0016]
Next, how to attach the fixture 2 to the attached body 3 will be described. First, the sensor holder 5 is mounted from the front surface to the mounting hole 4 formed in the mounted body 3, and the back plate 7 is brought into contact with the back surface of the mounted body 3. As a result, the protrusion 17 of the sensor receiving portion 13 engages with the opening 20 of the back plate 7, and both are in a temporarily fastened state. In this state, that is, in a state where the attachment body 3 is sandwiched between the flange 12 of the sensor holder 5 and the flange 19 of the back plate 7, the tapping screw 6 is screwed onto the boss portion 21 of the back plate 7 from the front, and the sensor The holder 5 is fixed to the attached body 3.
[0017]
Next, the decorative plate 8 is mounted together with the protective glass 11 on the sensing surface of the sensor body 1. At this time, the elastic engagement piece 24 of the decorative plate 8 bends outward, and the rectangular holes 24 a formed in the elastic engagement piece 24 engage with the protrusions 23 on both side surfaces of the sensor body 1.
[0018]
The sensor body 1 to which the decorative plate 8 is attached is inserted into the sensor receiving part 13 of the sensor holder 5 from the rear part. At this time, the tolerance between the sensor holder 5 and the decorative plate 8 (between the inner periphery of the sensor receiving portion 13 and the outer periphery of the mounting portion 22) is manufactured to be a snug fit, and there is some resistance. However, it pushes in as it is.
[0019]
When the sensor body 1 is fully pushed into the sensor receiving portion 13 together with the decorative plate 8, the elastic engagement piece 15 of the sensor holder 5 is bent upward, and the rectangular hole 15 a formed in the elastic engagement piece 15 is formed on the upper surface of the sensor body 1. The projection 14 is engaged. In this state, the lower elastic piece 16 applies a pressing force upward, so that the elastic engagement piece 15 of the sensor holder 5 and the protrusion 14 of the sensor main body 1 are reliably coupled.
[0020]
On the other hand, when the sensor main body 1 is fully pushed into the sensor receiving portion 13, the elastic engagement piece 24 on the side of the decorative plate 8 is sandwiched between the outer side surface of the sensor main body 1 and the inner side surface of the sensor receiving portion 13. Therefore, in a state where the sensor main body 1 is attached to the sensor holder 5, the elastic engagement piece 24 cannot be deformed laterally, thereby making it impossible to remove the decorative plate 8 from the front.
[0021]
In order to remove the sensor main body 1, for example, the upper surface of the attached body 3 is accessed from the upper side (in the case of the urinal shown in FIG. 4, the upper cover C can be removed), and the elastic engagement piece 15 of the sensor holder 5 is removed from the rear surface. If the elastic engagement piece 15 is released from the protrusion 14 on the upper surface of the sensor body 1 by being deformed upward (arrow A in FIG. 3), and the sensor body 1 is pushed forward in this state, the decorative plate 8 At the same time, the sensor body 1 can be pushed forward.
[0022]
If the sensor main body 1 is removed from the sensor holder 5, the elastic engagement piece 24 of the decorative plate 8 can be deformed laterally, so that the decorative plate 8 can be easily detached from the sensor main body 1.
[0023]
By the way, such a sensor may have to define, for example, the vertical direction for convenience of directivity. In such a case, if the assembly is incorrect, the directivity will be reversed, so that especially in the case where the top and bottom and the left and right are symmetrical, as shown in this embodiment, the assembly process may cause incorrect assembly. It is preferable that some measures are taken so as not to occur.
[0024]
From this point of view, in the present embodiment, an interengagement means including a protrusion 31 and a recess 32 is provided only on one side in the left-right direction of the mutually facing portion of the flange 12 of the sensor holder 5 and the decorative plate 8. The directionality when the sensor holder 5 and the decorative plate 8 are assembled is defined. Further, ribs 33 a and 33 b corresponding to the contour of the elastic engagement piece 24 of the decorative plate 8 are formed on the side surface of the sensor body 1, and a convex portion 34 is formed only on the base of the elastic engagement piece 24. In addition, by retracting only the front end position of the upper rib 33a by the amount of the convex portion 34, the sensor body 1 and the decorative plate 8 cannot be assembled correctly if the vertical direction is wrong.
[0025]
As mentioned above, although one Example concerning this invention was described, this invention is not limited to the said Example, For example, sensors of various fields, such as a toilet bowl, an automatic water tap, a warm air dryer, or an automatic door, are mentioned. It is applicable to the mounting part.
[0026]
【The invention's effect】
As described above in detail, according to the present invention, the detachability of the sensor main body can be improved without increasing the number of parts, so that it has a great effect on improving the assembling workability and the maintainability. Can play.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing the structure of a sensor body and its fixture according to the present invention. FIG. 2 is a side sectional view showing an assembled state. FIG. 3 is a plan sectional view showing an assembled state. Whole perspective view of applied male urinal [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sensor main body 2 Attached tool 3 Attached body 4 Mounting hole 5 Sensor holder 6 Tapping screw 7 Back plate 8 Decorative plate 9 Sensing window 10 Sealing member 11 Protective glass 12 Flange 13 Sensor receiving part 14 Protrusion 15 Elastic engagement piece 16 Elasticity Piece 17 Retaining projection 18 Tapping screw insertion portion 19 Flange 20 Opening 21 Boss portion 22 Mounting portion 23 Protrusion 24 Elastic engagement piece

Claims (3)

A sensor body having a first engagement portion and a second engagement portion on its outer surface;
A decorative plate having an elastic engagement piece that engages with the first engagement portion, and abutting against the front surface of the attached body;
A sensor holder that has a receiving portion that receives the sensor body and an elastic engagement piece that engages with the second engagement portion, and that is fixed to the attached body;
The elastic engagement piece of the sensor holder is always capable of forcibly bending in the direction of releasing the engagement from the second engagement portion,
The elastic engagement piece of the decorative plate is configured to be incapable of being deformed by being sandwiched between the inner surface of the receiving portion and the outer surface of the sensor main body when the sensor main body is mounted on the receiving portion. The structure of the sensor fixing part. The sensor holder has a flange that contacts the front surface of the mounted body, and the flange of the flange is sandwiched between a back plate that contacts the back surface of the mounted body and the flange. The structure of the sensor fixing portion according to claim 1, wherein a screw is screwed to the back plate from the front surface and fixed to the attached body. The structure of the sensor fixing part according to claim 1, wherein the sensor is a human body sensor provided on a front surface of a male urinal.

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