JP2001210133A - Electric light fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the creak noise when turning on or off a lamp. SOLUTION: A lighting fixture 1 has a lighting device and a lamp, with a globe 2 which has inside a lamp. By controlling the friction change resulting from the heat deformation when turning on or off a lamp on the contact between the fixture 1 and globe 2, the noise generated by the phenomenon of stick-slip was made inaudible. On this occasion, by increasing the rigidity of the globe 2 against the heat deformation, the level of the generated noise by the phenomenon of stick-slip was decreased. This method enables to lessen the uncomfortable creak noise generated by the heat deformation of the fixture 1 and the globe 2 when turning on or off a lamp. Also this prevents bugs from entering the globe 2, to avoid another problems such as spoiling the appearance due to dead bugs body inside the globe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to lighting of a lamp,
The present invention relates to a lighting device that may generate a sound due to thermal deformation caused by turning off the light.

[0002]

2. Description of the Related Art Conventionally, an unpleasant squeaking sound may be generated due to the thermal deformation of an appliance body and a glove accompanying turning on and off of a lamp. In general, gloves are often made of synthetic resin such as acrylic resin, and have a large thermal expansion compared to metal such as steel plate or wood, etc. that make up the device body that comes into contact. It is believed that sound is generated at Conventionally, as a measure for preventing the generated sound, as shown in Japanese Patent Application Laid-Open No. 8-273421 shown in FIGS. 34 and 35, a glove 5 is used to reduce or eliminate the places where rubbing occurs.
0 and a gap G in the portion (glove frame 51) in contact therewith.
And a non-contact method.

[0003]

However, if a non-contact gap is provided even if it is a part of the glove, insects that enter the inside of the glove from the gap due to the attraction of the lamp emission become dead bodies. There is a new problem of accumulation and a great loss of appearance.

Accordingly, an object of the present invention is to reduce the squeaking noise caused by turning on and off a lamp, and
The purpose is to provide a lighting device that does not allow insects to get inside the glove.

[0005]

According to one aspect of the present invention, there is provided a lighting fixture having a lighting device and a lamp, and a lamp housed in the lighting fixture. In a lighting device provided with a glove, the lighting caused by a stick-slip phenomenon is suppressed by suppressing an increase in frictional force at a contact portion between the device main body and the glove, which occurs at the time of thermal deformation accompanying turning on and off of the lamp. The noise of the equipment was not heard.

As described above, by suppressing the change in the frictional force at the contact portion between the device main body and the glove, which is generated when the lamp is turned on and turned off, the noise caused by the stick-slip phenomenon can be prevented from being heard. As a result, it is possible to reduce the unpleasant squeaking noise generated by the heat deformation of the appliance body and the glove when the lamp is turned on and off. In addition, since a path for insects to enter the glove is not created, there is no new problem that the appearance is impaired by a dead body.

[0007] In the lighting apparatus according to the second aspect, the level of the sound generated by the stick-slip phenomenon is reduced. As described above, the level of the sound generated by the stick-slip phenomenon is reduced, so that the generated sound can be prevented from being felt by a person.

According to a third aspect of the present invention, in the second aspect, the level of the sound generated by the stick-slip phenomenon is reduced by increasing the rigidity of the glove against thermal deformation. As described above, by increasing the rigidity of the globe against thermal deformation, the amount of deformation of the globe is reduced. on the other hand,
Lighting equipment noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static frictional force between the glove and the equipment body, and the volume of the generated sound is related to the stored friction energy. In addition, the level of generated sound can be reduced by reducing the amount of deformation.

According to a fourth aspect of the present invention, in the second aspect, the level of sound generated by the stick-slip phenomenon is reduced by reducing static friction energy accumulated due to thermal deformation of the glove. As described above, by reducing the static friction energy accumulated due to the thermal deformation of the globe, the frictional force is reduced and the amount of deformation of the glove is also reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to a fifth aspect of the present invention, in the lighting apparatus according to the fourth aspect, a load in which the glove comes into contact with the apparatus main body is reduced. As described above, by reducing the load with which the glove comes into contact with the instrument body, the frictional force is reduced, and the amount of deformation of the glove is also reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to a sixth aspect of the present invention, in the lighting apparatus according to the fourth aspect, the load in which the glove comes into contact with the apparatus main body is not increased more than the load in the unlit state. As described above, by not increasing the load with which the glove contacts the appliance body more than the load in the light-off state, the frictional force does not increase and the stored friction energy does not increase. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of the generated sound can be reduced by not increasing the friction energy.

According to a seventh aspect of the present invention, in the lighting apparatus according to the fourth aspect, the fixture main body has a receiving portion that fits with the glove, and the rigidity of the receiving portion is increased so that the glove comes into contact with the fixture main body. Was suppressed. in this way,
The appliance main body has a receiving part that fits with the glove, and by increasing the rigidity of this receiving part, the variation in the load that the glove contacts with the appliance main body is suppressed, so that the load at the contact part of the glove is below the allowable range. Can be on the other hand,
The smaller the load on the contact portion of the glove is, the smaller the stored friction energy is, so that the generated noise is reduced.

According to an eighth aspect of the present invention, in the lighting apparatus according to the fourth aspect, a coefficient of friction caused by contact between the glove and the apparatus main body is reduced. As described above, since the frictional force is reduced by reducing the friction coefficient due to the contact between the glove and the device main body, the deformation amount of the glove is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to a ninth aspect of the present invention, in the luminaire of the fourth aspect, the surface roughness of the glove in contact with the luminaire main body is set to be greater than about 25 μm in ten-point average roughness. As described above, since the surface roughness of the glove in contact with the instrument body is set to be greater than approximately 25 μm in ten-point average roughness, the frictional force is reduced, so that the amount of deformation of the glove is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to a tenth aspect of the present invention, the glove is made of a material having a small surface friction coefficient. As described above, since the material of the glove has a small surface friction coefficient, if the glove is made of a material having a small friction coefficient such as polyethylene, the frictional force is also reduced, so that the deformation amount of the glove is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to an eleventh aspect of the present invention, in the lighting device according to the fourth aspect, the surface of the device body that contacts the glove has a small coefficient of friction. As described above, since the tool body surface in contact with the glove has a small friction coefficient, if the tool body surface is made of a surface having a small friction coefficient such as a fluorine-based coating, the frictional force is also small, so that the deformation amount of the glove is small. Become. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to a twelfth aspect of the present invention, in the illuminating apparatus according to the fourth aspect, the luminaire main body has a receiving portion fitted to the glove, and the receiving portion has a small coefficient of friction. in this way,
The instrument body has a receiving part that fits with the glove, and this receiving part has a small friction coefficient, so if the receiving part is made of a surface with a small friction coefficient such as aluminum alloy, the frictional force is small and dispersion is suppressed. Therefore, the amount of deformation of the glove is small, and the variation is suppressed. on the other hand,
Lighting equipment noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static frictional force between the glove and the equipment body, and the volume of the generated sound is related to the stored friction energy. In addition, the level of generated sound can be reduced by reducing the amount of deformation.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lighting apparatus according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a main part of a first embodiment of the present invention, FIG. 2 is a partially cutaway front view of the entire lighting fixture of the first embodiment, and FIG.
FIGS. 4A to 4C are characteristic diagrams for explaining a mechanism of generating abnormal lighting noise, and FIGS. 4A and 4B are operation explanatory diagrams of the first embodiment.

As shown in FIG. 2, the lighting fixture includes a fixture main body 1 having a lighting device and a lamp 20, and a glove 2 attached to the fixture main body 1 and accommodating the lamp 20 therein. As shown in FIG. 1, in the mounting structure 4 for the appliance body 1 and the glove 2, the glove 2 is placed in a space formed by the contact portion 5 of the appliance body 1 and the contact portion 6 of the metal fitting 3 attached to the appliance body 1. Are located in such a manner that the fitting portion 7 is sandwiched. As the lamp is turned on and off, thermal deformation occurs in both the appliance main body 1 and the glove 2, and a difference (ΔL) in relative deformation between the glove 2 using synthetic resin such as acrylic resin and the appliance main body 1 generally occurs. Therefore, a sound is generated due to the rubbing. Therefore, by suppressing the change in the frictional force at the contact portion between the device main body 1 and the globe 2 which occurs at the time of thermal deformation accompanying the lighting and extinguishing of the lamp, the noise of the lighting device caused by the stick-slip phenomenon is not heard. In this embodiment, in a ceiling-type lighting device,
The thickness of the contact portion (fitting portion 7) of the glove 2 with the instrument body 1 is increased to form a thick portion 10. Thereby, the rigidity of the glove 2 against thermal deformation is improved.

Here, a description will be given of a mechanism of generating abnormal noise of the lighting equipment. Lighting equipment noise is a friction phenomenon that occurs when the expansion force of the glove due to thermal expansion exceeds the static friction force between the glove and the main body. Figure 3 shows a detailed observation of the frictional phenomenon between the steel plate (apparatus body) and acrylic (glove).
(A) and (b) are obtained. In (a), abnormal noise does not occur much, and in (b), abnormal noise often occurs. This is Figure 3
This is a stick-slip phenomenon, unlike the normal friction phenomenon shown in FIG. The stick-slip phenomenon is, as it were, a repetition of the static friction phenomenon. It is considered that the number of slips is greater in the case where the abnormal noise is not generated as much as in the case where the noise is generated frequently, but the sound of the slip (abnormal noise) is not audible to human ears due to the small size of the slip.

Considering the static friction force, slip (abnormal noise) occurs when the expansion force (F) of the glove due to thermal expansion> the friction force (μ · P) between the glove and the main body. In FIG. 4, F: extension force of the glove in the X direction,
P: Force of contact of the glove with the instrument body, μ: Coefficient of friction between the glove and the body, and looking at the elongation force (F) of the glove due to thermal expansion in more detail, F = glove rigidity (spring constant: k) · Thermal expansion (Δ
L) = k · [Thermal expansion coefficient (α) · temperature rise (ΔT) · magnitude (L)] Further, the magnitude of the abnormal noise generated is shown as follows.

[0022] The size of the sound = decay × E (energy) = attenuation × k · ΔL ^2/2 Therefore, the conditions of abnormal noise is, k · (α · ΔT · L)>
In μ · P, the size of the sound is dependent on the ^{E = k · ΔL 2/2} .

Next, the operation of the lighting apparatus will be described. As described in the abnormal sound generation mechanism, the lamp 20
In the thermal deformation accompanying the lighting and extinguishing of the glove, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ)
・ Pearling sound is generated in the case of P). In this embodiment, the thickness of the glove 2 is reduced at a portion necessary for light transmission or the like as a lighting fixture, while the thickness of the fitting portion 7 with the fixture main body 1 is increased.
The circumferential rigidity of the glove 2 was increased.
As a result, the amount of deformation (ΔL) in the case of (F)> (μ · P) becomes small, and the magnitude of the generated sound is related to the stored friction energy, so that the amount of deformation (ΔL) becomes small. As a result, the level of the generated sound can be reduced.

In this embodiment, an example is shown in which only the fitting portion 7 of the glove 2 is increased in thickness. However, if the optical characteristics required for the lighting fixture can be obtained, most of the globe can be made thicker. It may be a meat molding.

FIG. 5 is a sectional view of a main part of a modification of the first embodiment of the present invention. As shown in FIG.
Are combined with another part 7a. The thickness of the component 7a is increased. Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a sectional view showing a main part of a second embodiment of the present invention. In this embodiment, as shown in FIG. 6, the glove 2 is made of a material having a large Young's modulus.
The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
In this embodiment, the glove 2 is made of a material having a large Young's modulus while satisfying characteristics necessary for light transmission and the like as a lighting fixture, so that the glove 2 has a large circumferential rigidity. As a result, (F)> (μ ·
P) the amount of deformation (ΔL) in the case of the relationship of
Since the magnitude of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the deformation amount (ΔL).

Although the thickness of the globe 2 is made substantially constant in this embodiment, a combination of the example in which only the fitting portion 7 shown in the first embodiment is increased in thickness may be used. Absent.

FIG. 7 is a sectional view of a main part of a modification of the second embodiment of the present invention. As shown in FIG.
Is formed in combination with another part 7b, and is formed of a material having a large Young's modulus. Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a sectional view of a main part of a third embodiment of the present invention. In this embodiment, as shown in FIG.
Holding. Thereby, the glove 2 is attached to the device main body 1.
The static friction energy accumulated due to the thermal deformation of the globe 2 was reduced by reducing the load in contact with the glove 2. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
In this embodiment, the metal fitting 3 is made of a material having a small thickness, and the rigidity of the metal fitting 3 is reduced, so that the load (P) with which the globe 2 contacts the appliance body 1 can also be set small. As a result, the frictional force (μ · P) also decreases, and therefore, the deformation amount (Δ
L) becomes smaller. Since the volume of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the amount of deformation (ΔL).

FIG. 9 is a sectional view of a main part of a modification of the third embodiment of the present invention. As shown in FIG.
Is formed by combining the fitting portion 7 with another component 7c, and the metal fitting 3 holding the component 7c has a small rigidity. Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A fourth embodiment of the present invention will be described with reference to FIG. FIG. 10 is a sectional view showing a main part of a fourth embodiment of the present invention. In this embodiment, as shown in FIG. 10, there is another configuration in which the fitting portion 7 of the glove 2 is held by the metal fitting 3 having small rigidity. That is, the metal fitting 3
An elastic structure 8 such as a coil spring is interposed between the glove 2 and the fitting portion 7 of the glove 2, thereby reducing the rigidity of the metal fitting 3. The overall configuration of the lighting fixture is the same as in FIG. The operation of this lighting fixture is the same as that of the third embodiment.

FIG. 11 is a sectional view of a main part of a modification of the fourth embodiment of the present invention. As shown in FIG. 11, the fitting portion 7 of the glove 2 is configured by combining with another component 7c,
An elastic structure 8 such as a coil spring is interposed between the component 7c and the metal fitting 3 to reduce the rigidity of the fitting structure.
Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A fifth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a sectional view of a main part according to a fifth embodiment of the present invention. In this embodiment, as shown in FIG. 12, a thin portion 11 in which the thickness of the fitting portion 7 of the globe 2 is extremely small is formed. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
In this embodiment, the load (P) with which the globe 2 comes into contact with the instrument body 1 can be set small by making the thickness of the fitting portion 7 of the glove 2 extremely small. As a result, the friction force (μ
Since (P) also becomes smaller, the amount of deformation (ΔL) in the case of (F)> (μ · P) becomes smaller. The loudness of the generated sound is related to the stored friction energy,
The reduction in the amount of deformation (ΔL) makes it possible to reduce the level of the generated sound.

In this embodiment, an example is shown in which only the portion of the fitting portion 7 of the glove 2 that contacts the instrument body 1 is made the thin portion 11 to reduce the thickness. May be thin-walled.

FIG. 13 is a sectional view of a main part of a modification of the fifth embodiment of the present invention. As shown in FIG. 13, the fitting part 7 of the glove 2 is configured by being combined with another component 7d,
This part 7d was thin-walled to reduce rigidity.
Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A sixth embodiment of the present invention will be described with reference to FIGS. FIG. 14 shows a sixth embodiment of the present invention.
15 is a partially omitted perspective view of a fitting portion of the embodiment. In this embodiment, as shown in FIG. 15, the fitting portion 7 of the globe 2 is provided with a slit portion 12 to reduce rigidity. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
In this embodiment, by providing the slit portion 12 in the fitting portion 7 of the glove 2, the load (P) with which the globe 2 comes into contact with the instrument body 1 can also be set small. As a result, the frictional force (μ · P) also decreases, so that (F)> (μ · P)
, The deformation amount (ΔL) becomes smaller. Since the volume of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the amount of deformation (ΔL).

FIG. 16 is a sectional view of a main part of a modification of the sixth embodiment of the present invention, and FIG. 17 is a perspective view of a fitting portion thereof. As shown in FIG. 17, the fitting portion 7 of the glove 2 is configured by combining with another component 7e, and the component 7e is provided with a slit portion 11 to reduce rigidity. Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A seventh embodiment of the present invention will be described with reference to FIGS. FIG. 18 shows a seventh embodiment of the present invention.
FIG. 19 is a graph showing the change over time of the contact load. In this embodiment, as shown in FIG. 18, an inclined portion 12 is provided at a contact portion 5 of the instrument main body 1 with the glove 2. Thereby, the glove 2 is attached to the device main body 1.
The load in contact with the load was not increased more than the load in the unlit state. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
On the other hand, since thermal deformation exists not only in the circumferential direction (x direction) of the globe 2 but also in the vertical direction (z direction), the load (P) at which the globe 2 comes into contact with the appliance body 1 increases at the time of lighting ( (FIG. 19). As a result, the frictional force (μ
As the amount of frictional energy increases with an increase in P), the generated noise tends to increase. In this embodiment, the load (P) at which the glove 2 comes into contact with the device main body 1 is set to a level at which no unpleasant sound is generated by the inclined portion 12, and the load (P) is generated in an unlit state even when the glove 2 is turned on. It is possible to reduce the level of the generated sound by preventing the level of the generated sound from increasing beyond the threshold value.

FIG. 20 is a sectional view of a main part of a modification of the seventh embodiment of the present invention. As shown in FIG. 20, an inclined portion 13 is provided in the fitting portion 7 of the glove 2 that contacts the metal fitting 3. This embodiment has a similar effect.

An eighth embodiment of the present invention will be described with reference to FIG. FIG. 21 is a sectional view showing a main part of an eighth embodiment of the present invention. In this embodiment, as shown in FIG. 21, the instrument main body 1 has a receiving portion that fits with the glove 2, and by increasing the rigidity of the receiving portion, the glove 2
Has suppressed the variation of the load contacting the instrument body 1. In this case, the fitting portion 7 of the glove 2 is in a positional relationship in which the fitting portion 7 of the glove 2 is sandwiched in the space formed by the contact portions 6 and 9 of the metal fitting (receiving portion) 3 ′ attached to the appliance body 1. Joint 7
Is limited to the metal fitting 3 '. Further, a concave portion 14 into which the contact portion 9 is fitted is formed in the instrument body 1.
The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the smaller the load (P) of the contact portion of the glove 2 is, the smaller the frictional energy stored in the thermal deformation accompanying the turning on and off of the lamp 20 is, so that the generated noise is reduced. It tends to be smaller.
However, in the case of the lighting equipment, the lighter the weight, the easier the mounting work becomes. Therefore, a thin steel plate or an aluminum plate is used for the lighting device main body 1, and as a result, the lighting device main body 1 can secure only enough rigidity so as not to hinder the mounting. It is common. The appliance body 1 is locally distorted due to the undulation of the mounting ceiling surface, and the load (P) at the contact portion of the glove 2 may vary. Also, the glove 2 may have variations in the dimensions of the fitting portion depending on the molding conditions.
In this embodiment, in order to suppress the variation of the load (P) with which the glove 2 is set so as not to cause harsh sound, the glove 2 is clamped by the metal fitting 3 ′. In addition, the range of variation can be set with the tool body 1 and the tool body 1
, The load (P) at the contact portion of the glove 2 can be reduced to an allowable range or less, and the level of generated sound can be reduced.

FIG. 22 is a sectional view of a main part of a modification of the eighth embodiment of the present invention. As shown in FIG. 22, the fitting part 7 of the glove 2 was configured in combination with another component 7c. This component 7c is supported by one contact portion 6 of the metal fitting 3 ', and the other contact portion 9 extends below the flange 1a of the instrument body 1 and is in contact with the glove 2. This embodiment has a similar effect.

A ninth embodiment of the present invention will be described with reference to FIG. FIG. 23 is a sectional view showing a main part of a ninth embodiment of the present invention. In this embodiment, as shown in FIG. 23, there is a positional relationship in which the fitting part 7 of the glove 2 is sandwiched in the space formed by the contact part 5 of the instrument body 1 and the contact part 6 of the metal fitting 3. Further, the fitting portion 7 of the glove 2 was configured such that the same surface as the design surface (surface appearing on the surface) of the glove 2 was in contact with the instrument body 1. Here, the design surface refers to a surface to which a roll surface shape to be wound is transferred in the middle of the process of extruding a sheet-like acrylic resin or the like, which is usually a stage before molding the globe 2, and has a fine grain (or irregular surface). ), The embossing aids in the diffusion of light and also serves as a design accent. Further, the friction coefficient due to the contact between the glove 2 and the appliance main body 1 was reduced by the design surface having the irregularities, and the surface roughness of the glove 2 in contact with the appliance main body 1 was made larger than approximately 25 μm in ten-point average roughness. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
In this embodiment, the unevenness of the surface such as a grain is made to be a contact portion with the appliance body 1, and the friction coefficient (μ) of the contact portion
In order to reduce the surface roughness, the ten-point average roughness of the surface in contact with the instrument body 1 is set to approximately 25 μm or more. As a result, the frictional force (μ · P) also decreases, so that (F)> (μ · P)
, The deformation amount (ΔL) becomes smaller. Since the volume of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the amount of deformation (ΔL).

A tenth embodiment of the present invention will be described with reference to FIG. FIG. 24 is a sectional view showing a main part of a tenth embodiment of the present invention. In this embodiment, FIG.
The glove 2 was formed by roughening the surface roughness of the portion 15 in contact with the instrument body 1 as shown in FIG. Such a glove 2
In the method of manufacturing, the surface of the mold side for fixing the sheet-like acrylic resin used for molding the globe 2 is roughened, and when the acrylic resin is heated at the time of molding, the mold surface shape is transferred. To make the surface of the fitting portion 7 of the glove 2 rough. The overall configuration of the lighting fixture is the same as in FIG.

As in the ninth embodiment, the function of the lighting device can be set so that the friction coefficient (μ) of the contact portion can be set small. As a result, the friction force (μ · P) also becomes small. F)> (μ · P) where the deformation amount (Δ
L) becomes smaller. Since the volume of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the amount of deformation (ΔL).

It is to be noted that, as in the ninth embodiment, it is desirable that the roughness of the surface in contact with the instrument body 1 be about 25 μm or more in ten-point average roughness.

FIG. 25 is a sectional view of a main part of a modification of the tenth embodiment of the present invention. As shown in FIG. 25, the fitting part 7 of the glove 2 was configured by combining it with another component 7c. Further, the flange 1a of the instrument body 1 serves as a contact portion 5 with the glove 2, and the surface roughness of a portion 15 of the glove 2 with which the contact portion 5 contacts is roughened. This embodiment has a similar effect. The surface roughness of another component 7c may be increased.

An eleventh embodiment of the present invention will be described with reference to FIG. FIG. 26 is a sectional view showing a main part of an eleventh embodiment of the present invention. In this embodiment, FIG.
The material of the glove 2 was a material having a small surface friction coefficient as shown in FIG. In this case, the fitting part 7 of the glove 2 sandwiched in the space formed by the contact part 5 of the instrument body 1 and the contact part 6 of the metal fitting 3 is made of a resin such as polyethylene having a small friction coefficient on the surface. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
When the fitting portion 7 is made of a material having a small friction coefficient such as polyethylene as in this embodiment, the frictional force (μ ·
Since P) also becomes smaller, the amount of deformation (ΔL) in the case of (F)> (μ · P) becomes smaller. Since the volume of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the amount of deformation (ΔL).

FIG. 27 is a sectional view of a main part of a modification of the eleventh embodiment of the present invention. As shown in FIG. 27, the fitting portion 7 of the glove 2 was combined with another component 7c, and was formed of a resin having a small surface friction coefficient such as polyethylene. Further, the flange 1 a of the instrument body 1 serves as a contact portion 5 with the glove 2. This embodiment has a similar effect.

A twelfth embodiment of the present invention will be described with reference to FIGS. FIG. 28 is a cross-sectional view of a main part of a twelfth embodiment of the present invention, and FIG. 29 is a cross-sectional view of a main part of a modification of the twelfth embodiment of the present invention. This embodiment has a configuration in which the eleventh embodiment and the eighth embodiment are combined. As shown in FIGS. 28 and 29, the fitting portion 7 of the glove 2 is similar to the eighth embodiment.
Are limited to the metal fitting 3 '. The fitting portion 7 of the glove 2 was made of polyethylene or the like having a small friction coefficient. The operation of this lighting fixture is the same as that of the eleventh embodiment.

A thirteenth embodiment of the present invention will be described with reference to FIG. FIG. 30 is a sectional view showing a main part of a thirteenth embodiment of the present invention. In this embodiment, FIG.
As shown in (1), the surface of the instrument body 1 that is in contact with the glove 2 has a small friction coefficient. In this case, the contact portion 5 of the instrument body 1 and the contact portion 6 of the metal fitting 3 for holding the fitting portion 7 of the glove 2 are formed of a surface having a small friction coefficient such as fluorine coating. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting equipment will be described. As described in the first embodiment, the elongation force (F) of the globe 2 and the friction force (μ · P) of the contact portion are (F)> (μ) in the thermal deformation accompanying the turning on and off of the lamp 20.・
In the case of P), an unpleasant sound is generated.
When the fitting portion 7 of the glove 2 is sandwiched between surfaces having a small friction coefficient such as a fluorine coating as in this embodiment, the frictional force (μ · P) is also reduced.
> (Μ · P), the amount of deformation (ΔL) becomes smaller. Since the volume of the generated sound is related to the stored friction energy, the level of the generated sound can be reduced by reducing the amount of deformation (ΔL).

FIG. 31 is a sectional view of a principal part of a modification of the thirteenth embodiment of the present invention. As shown in FIG. 31, in a configuration in which the surfaces of the contact portions 5 and 6 on the instrument body 1 side have a small friction coefficient by fluorine coating or the like, the fitting portion 7 of the glove 2 is combined with another component 7 c and made of polyethylene or the like. It was made of a resin with a small surface friction coefficient. Also, the instrument body 1
Is a contact portion 5 with the globe 2. In this embodiment, since the mutual friction coefficient between the contact surfaces is small, the level of the generated sound can be further reduced.

A fourteenth embodiment of the present invention will be described with reference to FIG. FIG. 32 is a sectional view showing a main part of a fourteenth embodiment of the present invention. In this embodiment, FIG.
As shown in (1), the instrument body 1 has a receiving portion to be fitted with the glove 2, and the receiving portion has a small coefficient of friction. In this case, the contact of the fitting part 7 of the glove 2 is limited to the metal fitting (receiving part) 3 ′, and the contact parts 6, 9 of the metal fitting 3 ′ for holding the fitting part 7 of the glove 2 are made of aluminum alloy. It is composed of a surface with a small coefficient of friction. The overall configuration of the lighting fixture is the same as in FIG.

Next, the operation of the lighting apparatus will be described. As described in the first embodiment, the smaller the load (P) of the contact portion of the glove 2 is, the smaller the frictional energy stored in the thermal deformation accompanying the turning on and off of the lamp 20 is, so that the generated noise is reduced. It tends to be smaller.
According to this embodiment, it is possible not only to suppress the variation of the load (P) with which the glove 2 is set so as not to cause harsh sound, and also to configure the glove 2 with a surface having a small friction coefficient (μ), thereby reducing the friction. Since the force (μ · P) is small and the variation can be suppressed, (F)>
The amount of deformation (ΔL) in the case of (μ · P) is small, and the variation is small. Since the loudness of the generated sound is related to the stored friction energy, the amount of deformation (Δ
By reducing L), the level of the generated sound can be reduced.

FIG. 33 is a cross-sectional view of a main part of a modification of the fourteenth embodiment of the present invention. As shown in FIG. 33, the fitting portion 7 of the glove 2 was configured in combination with another component 7c, and the contact portions 6, 9 of the metal fitting 3 'were formed of a surface having a small friction coefficient such as an aluminum alloy. This embodiment has a similar effect.

It is to be noted that the above embodiments may be combined with each other.

[0065]

According to the lighting apparatus of the first aspect of the present invention, the stick-slip is prevented by suppressing the change in the frictional force at the contact portion between the lighting apparatus main body and the glove, which is generated when the lamp is turned on and turned off, and which undergoes thermal deformation. Lighting fixtures caused by the phenomenon were made inaudible, so lighting of the lamp,
The unpleasant squealing noise generated by the thermal deformation of the instrument body and the gloves when the lights are turned off can be reduced. In addition, since a path for insects to enter the glove is not created, there is no new problem that the appearance is impaired by a dead body.

In the second aspect, the level of the sound generated by the stick-slip phenomenon is reduced, so that the generated sound can be prevented from being felt by a person.

According to the third aspect, by increasing the rigidity of the globe against thermal deformation, the amount of deformation of the globe is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to the fourth aspect, by reducing the static friction energy accumulated due to the thermal deformation of the glove, the frictional force is reduced and the amount of deformation of the glove is also reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to the fifth aspect, by reducing the load with which the glove comes into contact with the instrument body, the frictional force is reduced and the deformation of the glove is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

According to the sixth aspect, the load of the glove contacting the appliance body is not increased more than the load in the light-off state.
The frictional force does not increase and the stored frictional energy does not increase. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of the generated sound can be reduced by not increasing the friction energy.

According to the seventh aspect, the device main body has a receiving portion to be fitted with the glove, and by increasing the rigidity of the receiving portion, the variation in the load with which the glove comes into contact with the device main body is suppressed. The load on the contact portion can be reduced below the allowable range. On the other hand, the smaller the load on the contact portion of the glove is, the smaller the stored friction energy is.

According to the eighth aspect, the frictional force is reduced by reducing the friction coefficient due to the contact between the glove and the instrument body, so that the amount of deformation of the glove is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

In the ninth aspect, since the surface roughness of the glove in contact with the instrument body is made larger than about 25 μm in ten-point average roughness, the frictional force is also reduced, and the deformation of the glove is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

In the tenth aspect, since the material of the glove has a small surface friction coefficient, if the glove is made of a material having a small friction coefficient such as polyethylene, the frictional force is also reduced, so that the deformation amount of the glove is reduced. . On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

In the eleventh aspect, since the surface of the instrument body that contacts the glove has a small coefficient of friction, if the surface of the instrument body is made of a surface having a small coefficient of friction such as a fluorine-based coating, the frictional force will be small. The amount of deformation is reduced. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

In the twelfth aspect, the device main body has a receiving portion to be fitted to the glove, and this receiving portion has a small friction coefficient. Therefore, the receiving portion is made of a surface having a small friction coefficient such as an aluminum alloy. Since the frictional force is small and the variation is suppressed, the amount of deformation of the glove is small, and the variation is suppressed. On the other hand, the lighting noise is a friction phenomenon that occurs when the expansion force due to thermal expansion exceeds the static friction force between the glove and the device body, and the magnitude of the generated sound is related to the stored friction energy. As described above, the level of generated sound can be reduced by reducing the amount of deformation.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the lighting fixture of the first embodiment.

FIGS. 3A to 3C are characteristic diagrams for explaining a mechanism of generating abnormal noise of a lighting fixture.

FIGS. 4A and 4B are diagrams for explaining the operation of the first embodiment.

FIG. 5 is a cross-sectional view of a main part of a modification of the first embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part of a modification of the second embodiment of the present invention.

FIG. 8 is a sectional view of a main part of a third embodiment of the present invention.

FIG. 9 is a cross-sectional view of a main part of a modification of the third embodiment of the present invention.

FIG. 10 is a sectional view of a main part according to a fourth embodiment of the present invention.

FIG. 11 is a sectional view of a main part of a modification of the fourth embodiment of the present invention.

FIG. 12 is a sectional view showing a main part of a fifth embodiment of the present invention.

FIG. 13 is a fragmentary cross-sectional view of a modification of the fifth embodiment of the present invention.

FIG. 14 is a sectional view showing a main part of a sixth embodiment of the present invention.

FIG. 15 is a partially omitted perspective view of a fitting portion of FIG. 14;

FIG. 16 is a sectional view of a main part of a modification of the sixth embodiment of the present invention.

FIG. 17 is a perspective view of a fitting portion of FIG.

FIG. 18 is a sectional view showing a main part of a seventh embodiment of the present invention.

FIG. 19 is a graph showing a time change of a contact load.

FIG. 20 is a cross-sectional view of a main part of a modification of the seventh embodiment of the present invention.

FIG. 21 is a sectional view showing a main part of an eighth embodiment of the present invention.

FIG. 22 is a cross-sectional view of a main part of a modification of the eighth embodiment of the present invention.

FIG. 23 is a sectional view showing a main part of a ninth embodiment of the present invention.

FIG. 24 is a sectional view showing a main part of a tenth embodiment of the present invention.

FIG. 25 is a cross-sectional view of a main part of a modification of the tenth embodiment of the present invention.

FIG. 26 is a sectional view showing a main part of an eleventh embodiment of the present invention.

FIG. 27 is a cross-sectional view of a main part of a modification of the eleventh embodiment of the present invention.

FIG. 28 is a sectional view showing a main part of a twelfth embodiment of the present invention.

FIG. 29 is a fragmentary cross-sectional view of a modification of the twelfth embodiment of the present invention.

FIG. 30 is a sectional view showing a main part of a thirteenth embodiment of the present invention.

FIG. 31 is a fragmentary cross-sectional view of a modification of the thirteenth embodiment of the present invention.

FIG. 32 is a sectional view showing a main part of a fourteenth embodiment of the present invention.

FIG. 33 is a fragmentary cross-sectional view of a modification of the fourteenth embodiment of the present invention.

FIG. 34 is a perspective view of a conventional example.

FIG. 35 is a sectional view of a main part of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Glove 3 Metal fitting 4 Mounting structure 5 Contact part 6 Contact part 7 Fitting part 8 Elastic body 9 Contact part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takamasa Ikeda 1048 Kadoma Kadoma, Osaka Pref.Matsushita Electric Works, Ltd. Inventor Hideki Watanabe 1048 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works F-term (reference) 3K011 AA00 AA01 EF02 EF05

Claims (12)

[Claims] 1. A lighting apparatus comprising: a lighting device and a fixture main body having a lamp; and a glove attached to the fixture main body and accommodating the lamp therein. A lighting fixture characterized by suppressing a change in frictional force at a contact portion between the fixture main body and the glove so as to prevent the sound of the lighting fixture caused by the stick-slip phenomenon from being heard. 2. The lighting apparatus according to claim 1, wherein a level of a sound generated by the stick-slip phenomenon is reduced. 3. The lighting device according to claim 2, wherein the level of sound generated by the stick-slip phenomenon is reduced by increasing the rigidity of the glove against thermal deformation. 4. The lighting apparatus according to claim 2, wherein the level of sound generated by the stick-slip phenomenon is reduced by reducing static friction energy accumulated due to thermal deformation of the glove. 5. The lighting device according to claim 4, wherein the load with which the glove contacts the device main body is reduced. 6. The lighting device according to claim 4, wherein the load in which the glove contacts the device main body does not increase more than the load in the light-off state. 7. The lighting fixture according to claim 4, wherein the fixture main body has a receiving portion that fits with the glove, and the rigidity of the receiving portion is increased to suppress variations in the load at which the globe contacts the fixture main body. . 8. The lighting device according to claim 4, wherein a coefficient of friction caused by contact between the glove and the device body is reduced. 9. The ten-point average roughness of the glove in contact with the instrument body is greater than about 25 μm in terms of ten-point average roughness.
The lighting fixture as described. 10. The lighting apparatus according to claim 4, wherein the glove is made of a material having a small surface friction coefficient. 11. The lighting device according to claim 4, wherein the surface of the device body contacting the glove has a small coefficient of friction. 12. The luminaire according to claim 4, wherein the luminaire main body has a receiving portion fitted with the glove, and the receiving portion has a small coefficient of friction.