Lamp, and lighting device

Abstract

To provide a lighting fixture that can regulate movement of a board arranged inside a cover, and a luminaire.SOLUTION: A lighting fixture comprises: a cover having a cylindrical shape and translucency; a board in which a light source is arranged on one surface, and arranged inside the cover so that light is emitted toward the cover from the side of the one surface; and a base attached to an end part of the cover. The base comprises a guide part arranged inside the cover when the base is attached to the end part of the cover. An end part in a cylinder axis direction of the cover out of the board is arranged between the cover and the guide part when the base is attached to the end part of the cover.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture and a lighting device using the same.

Background Art

[0002] Conventionally, there is known a straight tube LED lamp in which a light source substrate is attached to a support having a heat dissipation function using an adhesive member, or fixed using a screw, a rivet, or the like. Further, with the improvement of the luminous efficiency of a light emitting element serving as a light source, a straight tube LED lamp that does not require a support is described in, for example, Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, when a support is not used, in order to direct the light emission direction of the LED in a desired direction, it is necessary to consider how to hold the substrate on which the light source is arranged inside the cylindrical outer casing. As one aspect of solving this problem, a guide surface for guiding an end portion of a substrate to a predetermined position is provided on a cylindrical base body of a base fixed to an end portion in the longitudinal direction of the outer casing, and only an end surface of an end portion in the longitudinal direction of the substrate located inside the base body is configured to contact the base body, and a lighting light source is shown.

[0005] Further, when the substrate is not arranged at a predetermined position inside the cylindrical outer casing, there is a risk that the substrate peels off and falls off from the outer casing, or the fallen substrate contacts the inner wall of the outer casing and damages the outer casing.

[0006] By the way, in a configuration where a substrate mounted inside an outer casing is guided to a predetermined position inside the outer casing by a guide surface formed inside a base body, as in the lighting light source described in Patent Document 1, there has been a problem that the width dimension of the substrate and the internal dimension of the base body are mutually restricted.

[0007] The present disclosure has been made to solve the above-described problems, and an object thereof is to provide a lighting fixture and a lighting apparatus that can restrict the movement of a substrate disposed inside a cover.

Means for Solving the Problems

[0008] A lighting fixture according to an aspect of the present disclosure includes a cylindrical and translucent cover, a substrate on which light sources are arranged on one surface and which is disposed inside the cover so that light is emitted from the side of the one surface toward the cover, and a base attached to an end of the cover. The base has a guide portion disposed inside the cover in a state where the base is attached to the end of the cover, and in a state where the base is attached to the end of the cover, an end portion of the substrate in the axial direction of the cylinder of the cover is disposed between the cover and the guide portion. , the guide part has a portion facing the side surface of the substrate, and the side opposite to the one surface of the guide part is a plane. It is characterized by the above.

[0009] A lighting fixture according to an aspect of the present disclosure includes a cylindrical and translucent cover, a substrate on which light sources are arranged on one surface and which is disposed inside the cover so that light is emitted from the side of the one surface toward the cover, a peripheral wall portion covering an end of the cover, a bottom wall portion closing an opening formed at the end of the cover, and a guide portion connected to either the peripheral wall portion or the bottom wall portion. The guide portion has a movement restricting portion disposed inside the cover and facing the one surface of the substrate in a state where the base is attached to the end of the cover. , the guide part has a portion facing the side surface of the substrate, and the side opposite to the one surface of the guide part is a plane. It is characterized by the above.

[0010] Other features of the present disclosure will be described below.

Advantages of the Invention

[0011] According to the present disclosure, by having the above configuration, the movement of the substrate disposed inside the cover can be restricted.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0013] A lighting fixture and a lighting device according to an embodiment of the present disclosure will be described with reference to the drawings. The same or corresponding components may be denoted by the same reference numerals, and the repeated description may be omitted.

[0014] Embodiment 1. FIG. 1 is a perspective view of a lighting device 1 according to Embodiment 1. The lighting device 1 includes a fixture 2 and a lighting fixture 3 detachably attached to the fixture 2. The lighting fixture 3 is, for example, a lighting light source supplied with power from the fixture 2. As shown in FIG. 1, the lighting fixture 3 has a cover 30 that constitutes an outer housing, and holding bases 40 attached to both ends of the cover 30. The lighting fixture 3 is, for example, a straight tube LED lamp. The fixture 2 has a set of sockets that hold both ends of the lighting fixture 3. The set of sockets consists of, for example, a holding socket 2A and a power supply socket 2B. In this case, one end of the lighting fixture 3 is held by the holding socket 2A, and the other end is held by the power supply socket 2B. According to an example, the holding socket 2A has a terminal (not shown) for holding the lighting fixture 3, and the power supply socket 2B has a terminal (not shown) for supplying (powering) power to the lighting fixture 3. The holding socket 2A terminal may also serve the function of grounding the lighting fixture 3. As the fixture 2, various types of fixtures that detachably attach the lighting fixture 3 can be adopted.

[0015] FIG. 2 is a perspective view of the lighting fixture 3. As shown in FIG. 2, the lighting fixture 3 according to Embodiment 1 includes a cylindrical translucent cover 30, a light source unit 60 disposed inside the cover 30, a holding base 40 attached to one end (one side) of the cover 30, and a power supply base 50 attached to the other end (the other side) of the cover 30.

[0016] The shape of the cover 30 is, for example, elongated and cylindrical (tubular). The cover 30 has translucency. The cover 30 may have diffusibility. The cover 30 can be formed using glass, resin, or a material containing these. For the cover 30, for example, a general-purpose glass tube can be used. As the material of the cover 30, for example, soda-lime glass composed of 70% - 72% silica (SiO2) can be used. Also, the cover 30 may use a straight tube with the same dimensional specifications as the straight tube before both ends are sealed, which is used in the manufacture of fluorescent lamps specified in the Japanese Industrial Standards (JIS). Furthermore, as the material of the cover 30, for example, a heat-resistant resin material may be used. The material of the cover 30 is not limited to the above materials.

[0017] The holding base 40 attached to one end of the cover 30, which is the left side of the cover 30 in FIG. 2, includes a peripheral wall portion 40a, a bottom wall portion 40b, and a terminal 40c. The holding base 40 has an opening in the portion facing the bottom wall portion 40b, and one end of the cover 30 is fitted into the holding base 40 through this opening. The peripheral wall portion 40a is, for example, cylindrical and is the portion that covers the end of the cover 30. The bottom wall portion 40b is connected to the peripheral wall portion 40a and closes the opening formed at one end of the cover 30. As the material of the peripheral wall portion 40a and the bottom wall portion 40b, an electrically insulating resin material, a ceramic material, or the like can be used. A terminal 40c is provided on the bottom wall portion 40b. This terminal 40c protrudes along the cylindrical axis of the holding base 40 from the surface of the bottom wall portion 40b. The holding base 40 can be integrally formed, for example, with a peripheral wall portion 40a and a bottom wall portion 40b having electrical insulation and a terminal 40c having conductivity. The holding base 40 has a structure in which the root portion of the terminal 40c is embedded in the bottom wall portion 40b, and the terminal 40c can be integrally formed with the bottom wall portion 40b by, for example, insert molding. The holding base 40 is held by the holding socket 2A. By being held by the holding socket 2A, the holding base 40 may form an electrical path for grounding the lighting fixture 3.

[0018] In FIG. 2, the power supply base 50 attached to the other end of the cover 30 on the right side of the cover 30 includes a peripheral wall portion 50a, a bottom wall portion 50b, and a pair of terminals 50c. In Embodiment 1, the peripheral wall portion 50a and the bottom wall portion 50b of the power supply base 50 are substantially in the same manner as the peripheral wall portion 40a and the bottom wall portion 40b of the holding base 40, but may be in a manner different in shape or material. The power supply base 50 can be integrally formed with, for example, a peripheral wall portion 50a and a bottom wall portion 50b having electrical insulation properties, and terminals 50c having conductivity. The power supply base 50 has a structure in which the terminals 50c penetrate the bottom wall portion 50b, and the terminals 50c can be integrally formed with the bottom wall portion 50b by, for example, insert molding. The power supply base 50 is held by the power supply socket 2B. The pair of terminals 50c are power supply terminals that serve as a path for the power supplied to the lamp 3 while being held by the power supply socket 2B. That is, an electrical path for supplying power to the lamp 3 can be formed by the power supply base 50 and the power supply socket 2B.

[0019] The holding base 40 and the power supply base 50 are not limited to the types described above. For example, various types of bases such as GX16 type, G13 type, or T5 type can be adopted as the holding base 40 provided on the left side of the lamp 3 in FIG. 2. Also, for example, various types of bases such as GX16 type, G13 type, or T5 type can be adopted as the power supply base 50 provided on the right side of the lamp 3 in FIG. 2. Any base can be provided instead of the holding base 40 and the power supply base 50. When the lamp 3 is properly attached to the fixture 2, the pair of terminals 50c are electrically connected to the power supply socket 2B.

[0020] The light source unit 60 includes a substrate 62 provided inside the cover 30 and light sources 61 arranged on one surface which is the upper surface of the substrate 62. Light is emitted from one surface which is the upper surface of the substrate 62 on which the light sources 61 are arranged. In FIG. 2, a simplified configuration inside the cover 30 is shown by a broken line. The substrate 62 can be formed in a long shape according to the shape of the internal space of the cover 30. As the base material of the substrate 62, a glass epoxy material, a paper phenolic material, a composite material, a metal material such as aluminum, or the like can be used. The thickness of the substrate 62 is, for example, about 1 mm. The width of the substrate 62, that is, the length in the short side direction Y can be made constant or shortened at one or both ends in the longitudinal direction X of the substrate 62. At the end in the longitudinal direction X of the substrate 62, a recess 63 recessed toward the opposite end is provided. Specifically, the recess 63 has an end in the longitudinal direction X of the substrate 62 notched in a V shape.

[0021] A wiring pattern is formed on the upper surface which is the mounting surface of the substrate 62. In Embodiment 1, on the upper surface of the substrate 62, as a plurality of light sources 61 of the substrate 62, surface-mount type light-emitting diodes (LEDs) are mounted along the longitudinal direction X. As the light source 61, in addition to an LED, a laser element or an organic EL or the like can be used, and it can correspond to various mounting modes. For example, it may be a mode in which light is emitted from a laser element arranged at an end via a light guide portion, or a mode in which a film-like organic EL is attached to the substrate 62. The organic EL may be of a flexible type or a rigid type.

[0022] The light source 61 is electrically connected to a wiring pattern provided on the substrate 62, and a light source circuit is formed. Although not shown, circuit components for lighting the light source 61 may be mounted on the mounting surface of the substrate 62. The circuit components include, for example, a rectifier diode, a fuse, and a resistor. The circuit components are electrically connected by the wiring pattern to form a power supply circuit. The connection between the light source 61 and the circuit components and the wiring pattern provided on the surface of the substrate 62 is performed by, for example, soldering. The wiring pattern provided on the substrate 62 is electrically connected to a pair of terminals 50c of the power supply base 50 provided on the right side of the cover 30 in FIG. 2. Lighting power is supplied from this pair of terminals 50c to the wiring pattern, and the light source 61 lights up.

[0023] FIG. 3 is a cross-sectional perspective view showing a part of one end side of the lighting fixture 3. In FIG. 3, the terminal 40c is omitted. As shown in FIG. 3, the holding base 40 has a guide portion 44. The guide portion 44 is connected to the holding base 40 and extends into the cover 30. Specifically, the guide portion 44 is connected to the peripheral wall portion 40a or the bottom wall portion 40b. The guide portion 44 can be integrally formed with the peripheral wall portion 40a and the bottom wall portion 40b of the holding base 40 using the same material. Alternatively, according to another example, a guide portion 44 separate from the holding base 40 may be attached to the peripheral wall portion 40a or the bottom wall portion 40b.

[0024] The guide portion 44 in FIG. 3 includes a main body portion 44a and a pointed portion 44b. Most of the main body portion 44a is covered by the holding base 40. The pointed portion 44b is located on the side of the substrate 62 rather than the main body portion 44a. Therefore, at least a part of the pointed portion 44b is located on the side of the light source 61 rather than the holding base 40, and the tip of the pointed portion 44b is located on the side of the light source 61 rather than the holding base 40. The pointed portion 44b has a shape corresponding to the shape of the recess 63 of the substrate 62, and the substrate 62 and the guide portion 44 are fitted together by the contact between the pointed portion 44b and the recess 63. The substrate 62 and the guide portion 44 are fitted together on the side of the light source 61 rather than the holding base 40 in the longitudinal direction X of the cover 30. This fitting positions the substrate 62 and the holding base 40 relative to each other. The longitudinal direction X of the substrate 62 is the direction indicated by the arrow X in FIG. 3.

[0025] According to one example, a recess 63 can be formed in the central region in the short side direction Y of the substrate 62. The short side direction Y of the substrate 62 is the direction indicated by the arrow Y in FIG. 3. That is, regardless of the dimension of the substrate 62 in the short side direction Y, the recess 63 can be formed in the substrate 62. By setting the fitting position of the pointed portion 44b and the recess 63 at the center in the short side direction Y of the holding base 40, the fitting can be realized without being affected by the shape of the end portion in the short side direction Y of the substrate 62. The short side direction Y of the holding base 40 is the direction indicated by the arrow Y in FIG. 3.

[0026] FIG. 4A is another cross-sectional view of the luminaire 3 in FIG. 3. FIG. 4A is a cross-sectional view in a plane perpendicular to the longitudinal direction X of the luminaire 3 and is a cross-sectional view taken along the line A-A in FIG. 4B or FIG. 4C described later. In FIG. 4A, the terminal 40c is omitted. FIG. 4A shows the holding base 40 attached to the end of the cover 30. In the first embodiment, the cylinder axis (axis) of the cover 30 and the cylinder axis (axis) of the holding base 40 overlap. As shown in FIG. 4A, the other surface, which is the lower surface of the substrate 62, is adhesively fixed to the inner wall of the cover 30 by an adhesive 70. That is, the luminaire 3 does not use a support for arranging the substrate 62 inside the cover 30, and the substrate 62 is directly supported by the cover 30. Such a configuration is also referred to as a heat sinkless configuration. The dashed-dotted line indicated by B-B in FIG. 4A indicates the center in the short side direction Y of the holding base 40. As shown in FIG. 4A, a guide portion 44 is provided in the central region in the short side direction Y of the holding base 40.

[0027] FIG. 4B is a cross-sectional view taken along the line B-B in FIG. 4A. In FIG. 4B, the terminal 40c is omitted. As shown in FIG. 4B, the guide portion 44 is integrally formed with the peripheral wall portion 40a and the bottom wall portion 40b. And the pointed portion 44b extends beyond the holding base 40 toward the light source 61.

[0028] Figure 4C is a cross-sectional view taken along the line C-C of Figure 4A. In Figure 4C, the terminal 40c is omitted. As shown in Figure 4C, a recess 63 is provided in the central region in the short side direction Y of the substrate 62. The dashed line indicated by the arrow at B-B in Figure 4C shows the center in the short side direction Y of the holding base 40, and this dashed line coincides with the longitudinal direction X of the guide portion 44.

[0029] Although not shown in the figure, a guide portion similar to the above-described guide portion 44 is also provided on the power supply base 50 provided on the right side of the lamp unit 3 in Figure 2. Therefore, both ends of the substrate 62 in the longitudinal direction X are fitted with the guide portions.

[0030] In addition, Figures 3 and 4 show a mode in which the pointed portion 44b and the recess 63 are fitted at one location at the end of the substrate 62 in the longitudinal direction X. According to another example, two or more portions where the pointed portion and the recess are fitted can be provided at the end of the substrate 62 in the longitudinal direction X.

[0031] Also, the positions where the pointed portion and the recess are arranged may be reversed. Specifically, a pointed portion can be provided at the end of the substrate 62 in the longitudinal direction X, a recess can be provided at the tip of the guide portion 44, the recess and the pointed portion can be brought into contact, and the substrate and the guide portion can be fitted together.

[0032] As a method for assembling the above-described lamp unit 3, with the substrate 62 adhesively fixed to the inner wall of the cover 30, the holding base 40 or the power supply base 50 can be mounted on the end of the cover 30 while aligning the position by fitting a guide portion to the substrate 62 either to the left or right. In another example, with the holding base 40 or the power supply base 50 mounted on the end of the cover 30, the substrate 62 can be adhesively fixed to the inner wall of the cover 30 while aligning the position of the substrate 62 by fitting the substrate 62 to the guide portion. And the assembly of the lamp unit 3 may combine the above assembly methods.

[0033] Although illustration is omitted, the luminaire may have a power supply device including a power supply board. In this case, a concave portion or a pointed portion may be provided on the power supply board coupled to the board, and the concave portion or the pointed portion of the power supply board may be fitted into the guide portion. Although illustration is omitted, the luminaire may have an additional function device other than the power supply device. Such an additional function device includes an additional function board. In this case, a concave portion or a pointed portion may be provided on the additional function board coupled to the board, and the concave portion or the pointed portion of the additional function board may be fitted into the guide portion.

[0034] The modifications described in Embodiment 1 can also be applied to the luminaire and the lighting device according to the following embodiments. The luminaire and the lighting device according to the following embodiments will be mainly described with respect to the differences from Embodiment 1, and the common points with Embodiment 1 may be denoted by the same reference numerals and the description may be omitted.

[0035] Embodiment 2. FIG. 5A is a cross-sectional perspective view showing a part of one end side of the luminaire 3 according to Embodiment 2. In FIG. 5A, the terminal 40c is omitted. The guide portion 44 includes a movement restricting portion 44c formed at a position close to one surface of the board 62. The movement restricting portion 44c prevents the board 62 from moving in the +Z direction. The movement restricting portion 44c also has a function of preventing the board 62 from rotating about the longitudinal direction X as the central axis. FIG. 5B is a cross-sectional view of the luminaire 3 in FIG. 5A in a plane perpendicular to the longitudinal direction X. In FIG. 5B, the terminal 40c is omitted. The other surface, which is the lower surface of the board 62, is fixed to the inner wall of the cover 30 by the adhesive 70.

[0036] By providing the movement restricting portion 44c, even if the light source unit 60 is peeled off from the inner wall of the cover 30, the movement in the +Z direction is restricted and held, so that there is no risk that the light source 61 directly contacts the cover 30 and melts or damages the cover 30.

[0037] Embodiment 3. FIG. 6A is a cross-sectional perspective view showing a part of one end side of the lighting fixture 3 according to Embodiment 3. In FIG. 6A, the terminal 40c is omitted. The guide portion 44 includes a movement restricting portion 44d formed directly above the upper surface of the substrate 62. The movement restricting portion 44d has a length dimension along the short side direction Y of the base greater than the length dimension along the short side direction Y of the substrate 62. In other words, the width dimension of the movement restricting portion 44d is greater than the width dimension of the substrate 62. That is, the movement restricting portion 44d is formed at a position close to one surface of the substrate 62 so as to cover the entire end portion of the substrate 62 in the longitudinal direction X. Further, the guide portion 44 of Embodiment 3 includes a pair of side wall portions 44e. The side wall portion 44e is provided at the side end of the movement restricting portion 44d.

[0038] FIG. 6B is a cross-sectional view of the lighting fixture 3 in FIG. 6A in a plane perpendicular to the longitudinal direction X. In FIG. 6B, the terminal 40c is omitted. Since the movement restricting portion 44d is arranged at a position close to one surface of the substrate 62 so as to cover the entire end portion of the substrate 62 in the longitudinal direction X, movement of the substrate 62 in the +Z direction is prevented. A pair of side wall portions 44e connected to both side ends of the movement restricting portion 44d are formed in the guide portion 44. The side wall portion 44e extends from the movement restricting portion 44d toward the -Z direction side. It is preferable that the side wall portion 44e extends to the -Z direction side from one surface of the substrate 62. Specifically, the side wall portion 44e can be formed long enough to face the side wall of the substrate 62 fixed with the adhesive 70.

[0039] By providing the movement restricting portion 44c and the side wall portion 44e, even if the light source unit 60 is peeled off from the inner wall of the cover 30, movement in the +Z direction is restricted, and movement along the short side direction Y of the substrate 62 is restricted by the side wall portion 44e. Therefore, the substrate 62 and the movement restricting portion 44d are surely in contact with each other, and the light source unit 60 is held by the movement restricting portion 44d.

[0040] Embodiment 4. FIG. 7A is a cross-sectional perspective view showing a part of one end side of the lighting fixture 3 according to Embodiment 4. FIG. 7B is a cross-sectional view taken in a plane perpendicular to the longitudinal direction X of the lighting fixture 3 in FIG. 7A. In FIGS. 7A and 7B, the terminal 40c is omitted. As shown in FIGS. 7A and 7B, in the guide portion 44 of Embodiment 4, the upper end of the pointed portion 44b reaches the upper end of the movement restricting portion 44d, and the upper surface of the pointed portion 44b and the upper surface of the movement restricting portion 44d coincide with each other in the Z direction. As a result, a slit is formed on the tip side of the guide portion 44.

[0041] A part of the light emitted from the light source 61 passes through this slit and reaches the cover 30. That is, in the lighting fixture 3 according to Embodiment 4, the light passing through the slit is guided to the outside of the cover 30, so that the light amount on the end side in the longitudinal direction X can be increased. The lighting fixture 3 can improve the light utilization efficiency by this slit, and can particularly brighten the end side in the longitudinal direction X as compared with the case where no slit is formed in the guide portion 44.

[0042] As shown in FIG. 7B, the side wall portion 44e can be formed to be as long as to face the side wall of the substrate 62 fixed with the adhesive 70, similar to Embodiment 6.

[0043] Embodiment 5. FIG. 8 is a perspective view showing one end side of the lighting fixture 3 according to Embodiment 5. In FIG. 8, a part inside the cover 30 and the holding base 40 is shown by a broken line. The holding base 40 shown in FIG. 8 is a so-called G13H type base having two terminals 40d and 40e. Instead of the terminals 40d and 40e, a connector may be used or a lead wire may be drawn out. The lighting fixture 3 can adopt various types of bases as the holding base 40.

[0044] Embodiment 6. FIG. 9A is a cross-sectional perspective view showing a part of one end side of the lighting fixture 3 according to Embodiment 6. In FIG. 9A, the terminal 40c is omitted. The cover 30 has a main part 30a and an end part 30b with an inner diameter smaller than that of the main part 30a. The end part 30b is formed by connecting to both ends of the main part 30a and is covered by the peripheral wall part 40a of the holding base 40. The cover 30 having a smaller inner diameter at the end part 30b than at the main part 30a in this way is also called a neck form tube. The lighting fixture 3 using the neck form tube has a compact end part, so it is excellent in terms of attachability to the appliance 2 and design.

[0045] The guide part 44 includes a first part 44A and a second part 44B. At least a part of the first part 44A is surrounded by the end part 30b. The second part 44B is connected to the first part 44A, is located on the side of the substrate 62 rather than the first part 44A, and is a part surrounded by the main part 30a. The position of the substrate 62 is determined by the second part 44B being fitted into the recess 63 of the substrate 62.

[0046] FIG. 9B is a cross-sectional view showing a cross-section along the Z direction of a part of one end side of the lighting fixture 3 and is a cross-sectional view taken along line B-B of FIG. 9C described later. In FIG. 9B, the terminal 40c is omitted. The second part 44B protrudes to the side in the negative Z direction rather than the first part 44A. As a result, the lower surface 44BB of the second part 44B is located below the lower surface 44AA of the first part 44A. The substrate 62 is adhesively fixed to the main part 30a of the cover 30 using, for example, an adhesive 70.

[0047] In Embodiment 6, the second part 44B is formed thicker than the first part 44A so that the second part 44B can be fitted to the substrate 62 in the entire thickness direction. In order to enable such fitting, a part of the second part 44B faces the side surface of the substrate 62. According to an example, the second part 44B and the substrate 62 are fitted below the lower surface 44AA. The lower side is the side in the negative Z direction rather than the lower surface 44AA.

[0048] FIG. 9C is a cross-sectional view taken along line C-C of FIG. 9B. In FIG. 9C, terminal 40c is omitted. The position where the second portion 44B fits into the recess 63 in the longitudinal direction X of the cover 30 overlapping the longitudinal direction of the lamp unit 3 indicated by the dashed-dotted line is on the side of the light source 61 rather than the holding base 40. In the neck form tube, the substrate 62 cannot be disposed at a position surrounded by the holding base 40. However, by extending the guide portion 44 including the second portion 44B to a position surrounded by the main portion 30a inside the cover 30, the guide portion 44 and the substrate 62 in the lamp unit 3 using the neck form tube can be fitted together.

[0049] Embodiment 7. FIG. 10A is a cross-sectional perspective view showing a part of one end side of the lamp unit 3 according to Embodiment 7. In FIG. 10A, terminal 40c is omitted. Embodiment 7 uses a cover 30 which is a neck form tube as in Embodiment 6. In Embodiment 7, the substrate 62 includes a plate-like portion 62B and a convex portion 62A provided on one surface which is the upper surface thereof. The convex portion 62A protrudes to the +Z direction side rather than the plate-like portion 62B. The convex portion 62A is, for example, a block provided on the plate-like portion 62B.

[0050] The convex portion 62A includes a recess 62a formed on the side of the holding base 40 for fitting with the guide portion 44. In this case, the recess in the plate-like portion 62B may be omitted. The second portion 44C of the guide portion 44 fits into the recess 62a of the convex portion 62A. By this fitting, the mutual positioning between the substrate 62 and the holding base 40 is achieved.

[0051] FIG. 10B is a cross-sectional view showing a cross-section along the Z direction of a part on one end side of the lighting fixture 3, and is a cross-sectional view taken along line B-B of FIG. 10C described later. In FIG. 10B, the terminal 40c is omitted. The substrate 62 is adhesively fixed to the main part 30a of the cover 30 using, for example, an adhesive 70. In Embodiment 7, the thickness of the guide part 44 can be made uniform. In this case, the lower surface 44AA of the first part 44A and the lower surface 44CC of the second part 44C are at the same level. According to an example, the second part 44C does not face the side surface of the plate-shaped part 62B but faces the convex part 62A. Since the convex part 62A is a part that fits with the second part 44C, at least a part of the convex part 62A is located above the lower surface 44CC.

[0052] FIG. 10C is a cross-sectional view taken along line C-C of FIG. 10B. In FIG. 9C, the terminal 40c is omitted. In the longitudinal direction X of the cover 30 that overlaps with the longitudinal direction of the lighting fixture 3 indicated by the dashed-dotted line, the fitting position of the second part 44C and the recess 62a is on the side of the light source 61 rather than the holding base 40. Therefore, the guide part 44 in the neck form tube can be fitted with the substrate 62.

[0053] Regarding the guide parts described in all the embodiments so far, various modifications are possible. For example, when viewed from the X direction, the shape of the guide part can be a cross-sectional shape in a plane perpendicular to the longitudinal direction X of the lighting fixture 3, such as a T shape, a U shape, or an L shape. Also, the position where the substrate 62 and the guide part 44 are fitted can be any position on the side of the light source 61 rather than the holding base 40 in the longitudinal direction X of the lighting fixture 3.

[0054] As described above, the embodiments and modification examples of the present disclosure have been explained. However, among these embodiments and modification examples, two or more of them may be combined and implemented. Alternatively, one of these embodiments may be partially implemented. Alternatively, two or more of these embodiments may be partially combined and implemented. Note that the present disclosure is not limited to these embodiments, and various changes can be made as necessary.

Explanation of Reference Numerals

[0055] 1 Lighting device, 2 Appliance, 2A Holding socket, 2B Power supply socket, 3 Lamp, 30 Cover, 40 Holding base, 40a Peripheral wall portion, 40b Bottom wall portion, 40c, 40d, 40e Terminals, 44 Guide portion, 44a Body portion, 44b Tip portion, 44d Movement restricting portion, 44e Side wall portion, 44f Slit, 44A First portion, 44AA (Bottom surface of 44A), 44B Second portion, 44BB (Bottom surface of 44B), 44C Second portion, 44CC (Bottom surface of 44C), 50 Power supply base, 50a Peripheral wall portion, 50b Bottom wall portion, 50c, 50d, 50e Terminals, 60 Light source unit, 61 Light source, 62 Substrate, 62A Protrusion, 62a (Recess of 62A), 62B Plate-like portion, 63 Recess, 70 Adhesive

Claims

1. A cover that is cylindrical and has translucency, a substrate on which light sources are arranged on one surface and which is disposed inside the cover so that light is emitted from the side of the one surface toward the cover, a base attached to an end of the cover, comprising: the base having a guide portion disposed inside the cover in a state where the base is attached to the end of the cover, in a state where the base is attached to the end of the cover, an end portion of the substrate in the axial direction of the cylinder of the cover being disposed between the cover and the guide portion, the guide portion having a portion facing a side surface of the substrate, a lighting fixture in which a side opposite to the one surface of the guide portion is a flat surface.

2. A cover that is cylindrical and has translucency, a substrate on which light sources are arranged on one surface and which is disposed inside the cover so that light is emitted from the side of the one surface toward the cover, a peripheral wall portion covering an end of the cover, a bottom wall portion closing an opening formed at the end of the cover, and a guide portion connected to either the peripheral wall portion or the bottom wall portion, and a base attached to the end of the cover, comprising: the guide portion having a movement restricting portion disposed inside the cover and facing the one surface of the substrate in a state where the base is attached to the end of the cover, the guide portion having a portion facing a side surface of the substrate, a lighting fixture in which a side opposite to the one surface of the guide portion is a flat surface.

3. A lighting device comprising the lighting fixture according to claim 1 or claim 2, and an appliance to which the lighting fixture is detachably attached. ​

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