JPH0313928Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Purpose of the invention] (Field of industrial application) The present invention relates to a fluorescent lamp device that can be used in place of an incandescent light bulb and can save power. (Prior Art) This type of fluorescent lamp device includes a curved tube-shaped fluorescent lamp having a roughly saddle shape with three curved portions, a lighting circuit such as a ballast, and a screw cap. It is attached to a chassis, and the outer periphery of the chassis is covered by a base, and the base is covered with a globe that covers the outer periphery of the curved fluorescent lamp and the lighting circuit. By the way, when the outer periphery of a fluorescent lamp or ballast is covered in this way, the radiant heat from the lamp or ballast that occurs when the lamp is lit is stored in the base and inside the globe. There is a problem that the ambient temperature of the lamp increases and the mercury vapor pressure inside the lamp becomes higher than the optimum value, resulting in a decrease in luminous efficiency. Furthermore, since the base and the glove are made of synthetic resin, there is a risk that they may be deformed or discolored by the heat when the light is left on for a long period of time. In order to prevent this, the inventors of the present invention considered providing a plurality of slit-shaped communicating holes along the circumferential direction on the circumferential surface of the base, but initially the communicating holes were placed in a direction perpendicular to the axial direction of the base. It opened along. (Problem that the invention aims to solve) However, in vertical lighting with the cap facing upward, which is the most common lighting direction for this lamp device, the direction of heat convection and the opening direction of the ventilation hole are different. There were drawbacks such as extremely poor air permeability within the base and poor heat exhaust effect despite the provision of communicating holes. Further, the base has a shape such as a conical shape or a bowl shape, and has a circumferential surface that is inclined with respect to the axial direction of the base, and a plurality of slit-shaped communication holes along the circumferential direction on this circumferential surface. has been formed. However, when opening slit-like communication holes in such an inclined peripheral surface, these communication holes are visible from the side when opened in a direction perpendicular to the axial direction of the cap.
Since the inside can also be seen, there is also the problem that the appearance deteriorates. The present invention was developed based on the above circumstances, and its purpose is to improve the heat dissipation effect by increasing the ventilation inside the device body and the glove, and to make the ventilation holes difficult to see from the outside. It is an object of the present invention to provide a fluorescent lamp device that can improve the performance of the device. (Example) The present invention will be described below based on an example shown in the drawings. In the figure, 1 is the main body of the device, which includes a chassis 2 made of heat-resistant synthetic resin material and a chassis 2 made of a heat-resistant synthetic resin material.
The base 3 is attached to the chassis 2 and covers the outer periphery of the chassis 2. The chassis 2 has a cylindrical portion 4 at one end, and a male threaded portion 5 for attaching a base is formed on the outer circumferential surface of the cylindrical portion 4 on the distal end side. Attachment grooves 6, 6 are formed along the axial direction at two opposing locations on the circumferential surface of the cylindrical portion 4, and one end of these attachment grooves 6, 6 is connected to the tip opening edge of the cylindrical portion 4. It is open to On the other hand, the base 3 has a substantially bowl-like shape with both ends open, and is removably inserted into the mounting grooves 6, 6 through the opening at one end at two opposing locations on the edge of the opening at one end. Fitting protrusions 7, 7 are provided in a protruding manner. Therefore, this base 3 is chassis 2
In order to attach the cylindrical part 4 to the opening at one end of the base 3, the fitting protrusions 7, 7 are fitted into the mounting grooves 6, 6, and in this state, the external threaded part 5 is inserted into the opening of one end of the base 3. A cap 8 such as the E26 type is screwed in, the opening edge of the cap 8 is engaged with the opening edge of one end of the base 3, and the fitting protrusions 7, 7 are pressed into the terminal ends of the mounting grooves 6, 6. It is designed to be fixed by letting it move. A substantially spherical globe 10 having an opening 9 in a portion thereof is placed on the edge of the opening at the tip of the base 3. This glove 10
As a preferable example, a polycarbonate resin is used, and a light-diffusing material is mixed into this resin to make it colored white to make it light-diffusive. Locking claws 11 are provided at a plurality of locations on the opening edge of the glove 10, and these locking claws 11 are locked to locking protrusions 12 provided on the other end of the base 3. As a result, the glove 10 is removably fixed to the base 3. The circumferential surface of the base 3 that is inclined with respect to the axial direction of the base 8 is provided with slit-shaped ventilation holes 13 along the circumferential direction for communicating the inside and outside of the base 3. . That is, these ventilation holes 13 are integrally molded when the base 3 is molded, and are arranged in a plurality of rows close to each other concentrically around the entire circumference of the base 3. These ventilation holes 13 are opened along the axial direction of the base 8. Further, in this embodiment, a communication hole 14 is provided at the top of the globe 10 to communicate the inside and outside of the globe 10. Therefore, when this lamp device is lit vertically with the cap 8 facing upward, the base 3 and the inside of the globe 10 along the axial direction of the cap 8. On the other hand, two parts of the proximal edge of the cylindrical part 4 are opposite to each other.
Arm portions 15, 15 are protruded at the locations,
A mounting body 16 is integrally molded between the distal end portions of these arm portions 15, 15. The mounting body 16 has a substantially rectangular plate shape, and a through hole 17 is formed in the center between the arm portions 15, 15. A through hole 17 is provided on the glove side surface of the mounting body 16.
Fitting walls 18, 18, which are substantially U-shaped, are provided so as to face each other with the two sides in between.A stabilizer 19 is fitted and fixed between these fitting walls 18,18. On the glove side surface of such a mounting body 16,
The globe 1 surrounds the ballast 19 and
A curved tube fluorescent lamp 20 having a generally saddle shape is installed so as to be positioned within the center of the vehicle. That is, in this fluorescent lamp 20, a straight glass bulb is bent into a substantially U-shape at the center to form a first curved part 21, and both ends thereof are formed into flat surfaces including the above-mentioned U-shape. A pair of second curved portions 22, 22 are formed by bending in a substantially U-shape in substantially orthogonal directions;
The entire structure is formed into a roughly saddle shape. The fluorescent lamp 20 has its both ends and the first curved section 21 supported by the mounting body 16, and the second curved sections 22, 22 are opposed to the top of the globe 10. Note that reference numeral 23 is a lighting tube, and 24 and 24 are heat shielding walls that prevent radiant heat from the ballast 19 from acting directly on the first bending portion 21 and the lighting tube 22. However, according to such a configuration, the ventilation hole 1 opens in the circumferential surface of the base 3 along the axial direction of the base 8.
3... is provided, so that in the vertical lighting state with the base 8 facing upward, which is the most common lighting direction of this fluorescent lamp device, the convection direction of hot air in the base 3 and the opening of the ventilation hole 13... Since the directions substantially coincide with each other, the air permeability within the base 3 is significantly improved.
Particularly in this embodiment, since the communication hole 14 is also provided at the top of the globe 10, the outside air flowing into the globe 10 through the communication hole 14 cools the curved fluorescent lamp 20, the ballast 19, etc. The outside air whose temperature has been raised thereby is discharged to the outside through the ventilation holes 13. Therefore, the heat dissipation effect within the base 3 and the globe 10 is improved, and the lamp 20
It is possible to reliably prevent a decrease in luminous efficiency due to an increase in ambient temperature, and thermal deformation or discoloration of the base 3 and the globe 10. The inventors have investigated cases in which the opening direction of the slit-shaped ventilation holes 13 provided in the base 3 coincides with the axial direction of the cap as in the present invention, and when they do not coincide with the axial direction of the cap, that is, the opening direction of the slit-shaped ventilation holes 13... An experiment was conducted to determine the difference in cooling effect between a case where the vent hole is configured perpendicular to the axis of the cap, or in other words, a case where the slit-shaped vent hole is opened in the horizontal direction (comparative example). There are two measurement points: the surface temperature on the cap side of the ballast 19 and the second curved portion 22 of the fluorescent lamp 20. Since the conditions are the same, ventilation hole 1
3. The configuration was the same except for the opening method, and the experiment was conducted with an input power of 17W and an atmosphere of 25℃. In order to make the ventilation holes different only in the opening direction, the slit width of the ventilation hole 13 in the fluorescent lamp device of the example was 2 mm when viewed from the axial direction of the cap, whereas in the fluorescent lamp of the comparative example, the width of the slit was 2 mm. The device used was one with a slit width of 2 mm when the vent was viewed from the horizontal direction, so that the apparent surface area of the vent was the same. The results are shown in Table 1.

[Table] From the above results, it can be confirmed that the fluorescent lamp device according to the present invention has a higher cooling effect. Moreover, the plurality of slit-shaped ventilation holes 13...
Since they are formed on the circumferential surface of the base 3 that is inclined with respect to the axial direction of the cap 8, when opened in a direction perpendicular to the axial direction of the cap 8, these vent holes can be seen from the side and the inside can also be seen. However, since these slit-like ventilation holes 13 are opened along the axial direction of the cap 8, they are difficult to see from the side.
The exterior appearance is improved because the inside is also difficult to see. Further, in this embodiment, since the ventilation holes 13 are provided along the axial direction of the base 8, light from the fluorescent lamp 20 is emitted above the base 8 through these ventilation holes 13. In other words, this means that when the fluorescent lamp device is attached to a lighting fixture equipped with a reflective shade, the light emitted from the ventilation holes 13 will be reflected toward the glove 10 side by the reflective shade.
Therefore, of the light emitted from the fluorescent lamp 20, the proportion of light directed toward the base 3 that is absorbed by the base 3 is reduced, and can be efficiently guided to the outside. As a result, the light distribution characteristics of the lamp device are improved, and the direct illuminance is improved, especially when the lamp is lit vertically with the base 8 facing upward. Furthermore, even when this lamp device is viewed from the side, the chassis 2 and ballast 19 inside the base 3 are not directly visible. Furthermore, since the ventilation holes 13 are integrally molded when the base 3 is molded, if the opening direction of the ventilation holes 13 is perpendicular to the axial direction of the base 8 or oriented toward the center of the globe 10, This is not preferable since it becomes difficult to cut out the mold or the mold needs to be divided into parts. However, in the present invention, since the opening direction of the ventilation holes 13 is along the axial direction of the cap 8, that is, the base 3, it is not only easy to cut out the mold, but there is no need to divide the mold, and the cost of the mold can be reduced. It has the effect of reducing the amount by half or more and improving productivity. In the above example, the glove was made of polycarbonate resin, but it may be made of acrylic resin, and the connection structure between the glove and the base is not limited to the example. can. Further, in the above embodiment, the chassis is provided with a cylindrical portion for attaching the cap, but a cylindrical portion may be provided at one end of the opening edge of the base, and the cap may be attached to the base side. Further, the mounting structure of the cap is not limited to the screw type shown in the above embodiments, and various existing means such as fixing via adhesive on the cylindrical portion or punching can be applied. [Effects of the invention] As described above, the present invention has a curved tube-shaped fluorescent lamp and a ballast that are approximately saddle-shaped inside, and a ballast is installed on the circumferential surface of the device main body, which is provided with a cap, along the axial direction of the cap. Since the opening slit-shaped ventilation hole is provided, when this fluorescent lamp device is lit vertically with the cap facing upward, which is the most common lighting method, the direction of hot air convection inside the device body and the ventilation hole are different. The directions of the openings substantially coincide with each other, and therefore the air permeability within the main body of the apparatus is significantly improved. Therefore, the heat dissipation effect within the device body and within the glove is improved. In addition, since the plurality of slit-shaped ventilation holes are opened along the axial direction of the cap on the peripheral surface of the device main body that is inclined with respect to the axial direction of the cap, they are difficult to see from the side, and the inside is also visible. The appearance improves as it becomes less visible. In addition, the ventilation holes are formed before the molding of the device body, which not only makes it easier to remove the mold during molding, but also eliminates the need to separate the mold, which is extremely advantageous for molding. It has a great effect.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a sectional view, Fig. 2 is a sectional view taken along the line - in Fig. 1, Fig. 3 is an enlarged sectional view of the main part, and Fig. 4 is a side view of the base. FIG. DESCRIPTION OF SYMBOLS 1... Apparatus body, 8... Base, 10... Glove, 13... Ventilation hole, 20... Curved tube-shaped fluorescent lamp, 21... First bending part, 22... Second bending part. Department.

Claims (1)

[Claims for Utility Model Registration] (1) Attachment of a curved tube-shaped fluorescent lamp approximately in the shape of a saddle and a ballast to a device body that is equipped with a cap and has a peripheral surface inclined with respect to the axial direction of the cap. In addition, in a fluorescent lamp device in which the device body is covered with a glove, and the glove covers the curved fluorescent lamp and the ballast, the circumferential surface is attached to the inclined peripheral surface of the device body. A fluorescent lamp device characterized in that a slit-shaped ventilation hole is provided for communicating between the inside and outside of the main body along the direction, and the ventilation hole opens along the axial direction of the base. (2) The fluorescent lamp device according to claim (1) of the utility model registration, wherein the glove has a communication hole at the top thereof for communicating between the inside and outside of the glove.