Lamp unit, luminaire, lamp, socket, and appliance body unit

Abstract

To reduce the possibility that a nonconforming lamp is erroneously fitted to a socket.SOLUTION: A lamp unit 1 comprises a lamp 2, and a socket 3. The lamp 2 can be fitted to the socket 3. A lamp body 5 comprises a first identification convex part 56. The first identification convex part 56 is located closer to a central side than a power supply pin 7, and corresponds to a first property in the lamp 2. A socket body 8 comprises a power supply hole 83, and a first identification concave part 84. The first identification concave part 84 is located closer to the central side than the power supply hole 83, and the first identification convex part 56 can be inserted thereinto. The lamp body 5 also comprises a second identification concave part 57. The second identification concave part 57 is located closer to an outer peripheral edge side than the power supply pin 7, and corresponds to a second property in the lamp 2. The socket body 8 also comprises a second identification convex part 85. The second identification convex part 85 is located closer to the outer peripheral edge side than the power supply hole 83, and can be inserted into the second identification concave part 57.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure generally relates to lamp units, lighting fixtures, lamps, sockets, and fixture body units, and more particularly to lamp units including a lamp and a socket, lighting fixtures including a lamp unit, a lamp used with a socket, a socket used with a lamp, and fixture body units including a socket. [Background technology]

[0002] Patent Document 1 describes a lighting fixture that includes a fixture body and a light-emitting element lamp (lamp).

[0003] The fixture body includes a socket portion having a positive power supply terminal and a negative power supply terminal, and the fixture body is configured so that a straight tube light-emitting element lamp is attached to the socket portion (socket).

[0004] The light-emitting element lamp includes a positive power receiving terminal and a negative power receiving terminal (power supply pins) that are connected to the positive power supply terminal and the negative power supply terminal of the socket. The positive power receiving terminal and the negative power receiving terminal are cylindrical pin-shaped, and the positive power receiving terminal is larger in diameter and thicker than the negative power receiving terminal. In other words, the positive power receiving terminal and the negative power receiving terminal are formed in different shapes.

[0005] The lighting fixture described in Patent Document 1 further includes an erroneous connection prevention means for preventing the positive and negative power receiving terminals of the light-emitting element lamp from being connected to power supply terminals of opposite polarities in the socket. The erroneous connection prevention means restricts the direction in which the positive and negative power receiving terminals are inserted into the insertion grooves to one direction only. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-138272 Summary of the Invention [Problem to be solved by the invention]

[0007] Although the lighting fixture described in Patent Document 1 allows a lamp to be attached to a socket without making a mistake in the polarity of the power supply pin, there is a problem in that it cannot prevent an incompatible lamp from being attached to the socket by mistake.

[0008] The present disclosure is an invention made in consideration of the above points, and an object of the present disclosure is to provide a lamp unit, lighting fixture, lamp, socket, and fixture body unit that can reduce the possibility of an incompatible lamp being incorrectly installed in a socket. [Means for solving the problem]

[0009] A lamp unit according to one aspect of the present disclosure comprises a lamp and a socket. The lamp can be attached to the socket. The lamp comprises a light source, a lamp body, and a power feed pin. The light source is disposed in the lamp body. The power feed pin is provided on the lamp body and is a pin for receiving power. The socket comprises a socket body. The lamp body has a first identification protrusion. The first identification protrusion is located closer to the center than the power feed pin and corresponds to a first characteristic of the lamp. The socket body has a power feed hole and a first identification recess. The power feed hole is a hole into which the power feed pin can be inserted. The first identification recess is located closer to the center than the power feed hole and into which the first identification protrusion can be inserted. The lamp body further has a second identification recess. The second identification recess is located closer to the outer periphery than the power feed pin and corresponds to a second characteristic of the lamp. The socket body further has a second identification protrusion. The second identification protrusion is located closer to the outer periphery than the power supply hole and is insertable into the second identification recess.

[0010] A lamp unit according to one aspect of the present disclosure includes a lamp and a socket. The lamp can be attached to the socket. The lamp includes a light source, a lamp body, and a power feed pin. The light source is disposed in the lamp body. The power feed pin is provided on the lamp body and is a pin for receiving power. The socket includes a socket body. The lamp body has a first identification recess. The first identification recess is located closer to the center than the power feed pin and corresponds to a first characteristic of the lamp. The socket body has a power feed hole and a first identification protrusion. The power feed hole is a hole into which the power feed pin can be inserted. The first identification protrusion is located closer to the center than the power feed hole and can be inserted into the first identification recess. The lamp body further includes a second identification recess. The second identification recess is located closer to the outer periphery than the power feed pin and corresponds to a second characteristic of the lamp. The socket body further includes a second identification protrusion. The second identification protrusion is located closer to the outer periphery than the power supply hole and is insertable into the second identification recess. A lamp unit according to one aspect of the present disclosure comprises a lamp and a socket. The lamp can be attached to the socket. The lamp comprises a light source, a lamp body, and a power feed pin. The light source is disposed in the lamp body. The power feed pin is provided on the lamp body and is a pin for receiving power. The socket comprises a socket body. The lamp body has a first identification protrusion. The first identification protrusion is located closer to the center than the power feed pin and corresponds to a first characteristic of the lamp. The socket body has a power feed hole and a first identification recess. The power feed hole is a hole into which the power feed pin can be inserted. The first identification recess is located closer to the center than the power feed hole and into which the first identification protrusion can be inserted. The lamp body further has a second identification protrusion. The second identification protrusion is located closer to the outer periphery than the power feed pin and corresponds to a second characteristic of the lamp. The socket body further has a second identification recess. The second identification recess is located closer to the outer periphery than the power supply hole, and the second identification protrusion can be inserted into the second identification recess.

[0011] A lighting fixture according to one aspect of the present disclosure includes the lamp unit and a fixture body, the fixture body holding the socket.

[0012] A lamp according to one aspect of the present disclosure is a lamp that can be attached to a socket. The lamp includes a light source, a lamp body, and a power feed pin. The light source is disposed in the lamp body. The power feed pin is provided on the lamp body and is a pin for receiving power. The lamp body has an identification protrusion and an identification recess. The identification protrusion is located closer to the center than the power feed pin, corresponds to a first characteristic of the lamp, and is insertable into the identification recess of the socket. The identification recess is located closer to the outer periphery than the power feed pin, corresponds to a second characteristic of the lamp, and is insertable into the identification protrusion of the socket.

[0013] A lamp according to one aspect of the present disclosure is a lamp that can be attached to a socket. The lamp includes a light source, a lamp body, and a power feed pin. The light source is disposed in the lamp body. The power feed pin is provided on the lamp body and is a pin for receiving power. The lamp body has a first identification recess and a second identification recess. The first identification recess is located closer to the center than the power feed pin, corresponds to a first characteristic of the lamp, and allows a first identification protrusion of the socket to be inserted therein. The second identification recess is located closer to the outer periphery than the power feed pin, corresponds to a second characteristic of the lamp, and allows a second identification protrusion of the socket to be inserted therein. A lamp according to one aspect of the present disclosure is a lamp that can be attached to a socket. The lamp includes a light source, a lamp body, and a power feed pin. The light source is disposed in the lamp body. The power feed pin is provided on the lamp body and is a pin for receiving power. The lamp body has a first identification protrusion and a second identification protrusion. The first identification protrusion is located closer to the center than the power feed pin, corresponds to a first characteristic of the lamp, and is insertable into a first identification recess of the socket. The second identification protrusion is located closer to the outer periphery than the power feed pin, corresponds to a second characteristic of the lamp, and is insertable into a second identification recess of the socket.

[0014] A socket according to one aspect of the present disclosure is a socket into which a lamp can be attached. The lamp has a power feed pin. The power feed pin is a pin for receiving power. The socket comprises a socket body. The socket body has a power feed hole, an identification recess, and an identification protrusion. The power feed hole is a hole into which the power feed pin of the lamp can be inserted. The identification recess is located closer to the center than the power feed hole, and can accommodate the identification protrusion of a lamp of a type that the socket accepts for a first characteristic of the lamp, among multiple types of lamps including the lamp. The identification protrusion is located closer to the outer periphery than the power feed hole, and can be inserted into the identification recess of a lamp of a type that the socket accepts for a second characteristic of the lamp, among the multiple types of lamps.

[0015] A socket according to one aspect of the present disclosure is a socket into which a lamp can be attached. The lamp has a power feed pin. The power feed pin is a pin for receiving power. The socket includes a socket body. The socket body has a power feed hole, a first identification protrusion, and a second identification protrusion. The power feed hole is a hole into which the power feed pin of the lamp can be inserted. The first identification protrusion is located closer to the center than the power feed hole and can be inserted into a first identification recess of a lamp of a type that the socket accepts for a first characteristic of the lamp, among multiple types of lamps including the lamp. The second identification protrusion is located closer to the outer periphery than the power feed hole and can be inserted into a second identification recess of a lamp of a type that the socket accepts for a second characteristic of the lamp, among the multiple types of lamps. A socket according to one aspect of the present disclosure is a socket into which a lamp can be attached. The lamp has a power supply pin. The power supply pin is a pin for receiving power. The socket includes a socket body. The socket body has a power supply hole, a first identification recess, and a second identification recess. The power supply hole is a hole into which the power supply pin of the lamp can be inserted. The first identification recess is located closer to the center than the power supply hole, and can receive a first identification protrusion of a lamp of a type that is acceptable to the socket for a first characteristic of the lamp among multiple types of lamps including the lamp. The second identification recess is located closer to the outer periphery than the power supply hole, and can receive a second identification protrusion of a lamp of a type that is acceptable to the socket for a second characteristic of the lamp among the multiple types of lamps.

[0016] A tool body unit according to one aspect of the present disclosure includes the socket and a tool body, the socket being attached to the tool body. [Effects of the Invention]

[0017] The lamp unit, lighting fixture, lamp, socket, and fixture body unit according to the above aspects of the present disclosure can reduce the possibility of an incompatible lamp being erroneously attached to a socket. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is an exploded perspective view of a lamp unit according to a first embodiment. [Figure 2] FIG. 2 is a perspective view of the lamp according to the first embodiment. [Figure 3] FIG. 3 is a front view of the lamp according to the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view of the lamp according to the first embodiment. [Figure 5] FIG. 5 is a perspective view of the socket according to the first embodiment. [Figure 6] FIG. 6 is a front view of the socket according to the first embodiment. [Figure 7] FIG. 7 is a cross-sectional view of the socket according to the first embodiment. [Figure 8] FIG. 8 is an exploded perspective view of a lamp unit according to a first modification of the first embodiment. [Figure 9] FIG. 9 is an exploded perspective view of a lamp unit according to a second modification of the first embodiment. [Figure 10] FIG. 10 is an exploded perspective view of the lamp unit according to the second embodiment. [Figure 11] FIG. 11 is a perspective view of a lamp according to the second embodiment. [Figure 12] FIG. 12 is a perspective view of a socket according to the second embodiment. [Figure 13] FIG. 13 is a front view of the socket according to the second embodiment. [Figure 14] FIG. 14 is a cross-sectional view of a socket according to the second embodiment. [Figure 15] FIG. 15 is a schematic diagram of a lighting fixture according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] The lamp units according to Embodiments 1 and 2 and the lighting fixture according to Embodiment 3 will be described below with reference to the drawings. Each of Figures 1 to 15 referred to in the following embodiments is a schematic diagram, and the ratios of the sizes and thicknesses of the components in the figures do not necessarily reflect the actual dimensional ratios.

[0020] (Embodiment 1) (1) Lamp unit The configuration of a lamp unit 1 according to the first embodiment will be described with reference to the drawings.

[0021] 1, the lamp unit 1 according to the first embodiment includes a lamp 2 and a socket 3. The lamp unit 1 is used in, for example, a lighting fixture 9 (see FIG. 15).

[0022] (2) Each component of the lamp unit Hereinafter, each component of the lamp unit 1 according to the first embodiment will be described with reference to the drawings.

[0023] (2.1) Lamp As shown in FIGS. 1 to 4, the lamp 2 is a member that can be attached to a socket 3, and includes a light source 4, a lamp body 5, a cover 6, and a plurality of power supply pins 7 (two in the illustrated example).

[0024] (2.1.1) Light source 1 includes, for example, one or more LEDs (Light Emitting Diodes). When the light source 4 includes multiple LEDs, the multiple LEDs are arranged on a plane in the light source 4. The light source 4 is configured such that light from each LED is emitted from the light exit surface 61 of the cover 6 toward the outside of the lamp 2.

[0025] (2.1.2) Lamp body As shown in Figs. 2 to 4, the lamp body 5 accommodates the light source 4. The light source 4 is disposed in the lamp body 5. The lamp body 5 is made of, for example, resin.

[0026] The lamp body 5 has a first side surface portion 51, an annular portion 52, a second side surface portion 53, and a first mounting portion 54. In the first embodiment, the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54 are integrally formed. That is, the lamp body 5 is formed of a single member. Note that the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54 are not limited to being integrally formed, and may be formed separately. Alternatively, at least two of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54 may be formed separately. That is, the lamp body 5 may be formed of a plurality of members. Furthermore, each of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54 may be formed of a single member or a plurality of members.

[0027] The annular portion 52 has an annular shape. In the example of FIG. 2, the annular portion 52 has a circular annular shape. The annular portion 52 has an outer peripheral end 521 that forms the outer periphery of the annular portion 52, and an inner peripheral end 522 that forms the inner periphery of the annular portion 52. The annular portion 52 is provided at one end of the first side surface portion 51. The outer peripheral end 521 of the annular portion 52 and one end of the first side surface portion 51 are connected to each other.

[0028] The second side surface portion 53 is provided to protrude in the first direction D1 from the inner circumferential end 522 of the annular portion 52. Since the first side surface portion 51 is provided at the outer circumferential end 521 of the annular portion 52 and the second side surface portion 53 is provided at the inner circumferential end 522 of the annular portion 52, the second side surface portion 53 is smaller than the first side surface portion 51 in a plan view from the first direction D1. In other words, the diameter of the second side surface portion 53 is shorter than the diameter of the first side surface portion 51.

[0029] 2, the first installation portion 54 has a circular shape in a plan view from the first direction D1. The first installation portion 54 has an outer peripheral edge 541 that forms the outer periphery of the first installation portion 54. The first installation portion 54 is provided at one end of the second side surface portion 53. The outer peripheral edge 541 of the first installation portion 54 is connected to one end of the second side surface portion 53. The first installation portion 54 has a plurality of through holes 55 (two in the illustrated example) for the feed pins 7 to pass through.

[0030] (2.1.3) Cover 1 and 4 is translucent (including transparent) and transmits light emitted from the light source 4. The cover 6 is provided at one end in the first direction D1, which is the axial direction of the first side surface portion 51 of the lamp body 5. The cover 6 is provided on the lamp body 5 so as to cover the opening of the lamp body 5.

[0031] The cover 6 is made of a synthetic resin such as an acrylic resin, a polycarbonate resin, or a silicone resin. The cover 6 may be made of a material other than a synthetic resin. The cover 6 may be made of glass, for example. The cover 6 may also have light diffusing properties. Furthermore, the cover 6 may be transparent or milky white.

[0032] (2.1.4) Power supply pin As shown in Figures 1 to 4, the multiple power feed pins 7 are pins for receiving power, and are provided on the lamp body 5. More specifically, the multiple power feed pins 7 are provided to protrude from the first mounting portion 54 of the lamp body 5. The multiple power feed pins 7 are provided on the first mounting portion 54 at positions that are point-symmetric with respect to the center O1 of the first mounting portion 54.

[0033] Each feed pin 7 is made of a conductive material such as metal, and has a shaft portion 71 and a tip portion 72. In the example of embodiment 1, the shaft portion 71 and the tip portion 72 are integrally formed. However, the shaft portion 71 and the tip portion 72 may also be formed separately. When the shaft portion 71 and the tip portion 72 are formed separately, the shaft portion 71 and the tip portion 72 may be formed of the same type of metal, or may be formed of different types of metal.

[0034] (2.2) Socket As shown in FIG. 1, the socket 3 is a member to which the lamp 2 can be attached, and has a socket body 8.

[0035] (2.2.1) Socket body 5 to 7, the socket body 8 has a cylindrical shape with a bottom. The socket body 8 is made of, for example, resin.

[0036] The socket body 8 has a side surface portion 81 and a second installation portion 82. In the first embodiment, the side surface portion 81 and the second installation portion 82 are integrally formed. That is, the socket body 8 is made of a single member. Note that the side surface portion 81 and the second installation portion 82 are not limited to being integrally formed, and may be formed separately. That is, the socket body 8 may be made of a plurality of members. Furthermore, each of the side surface portion 81 and the second installation portion 82 may be made of a single member or a plurality of members.

[0037] As shown in Figures 5 to 7, the second installation portion 82 has a circular shape in a plan view from the first direction D1. The second installation portion 82 has an outer circumferential edge 821 that forms the outer periphery of the second installation portion 82. The second installation portion 82 is provided at the other end of the side surface portion 81. The outer circumferential edge 821 of the second installation portion 82 and the other end of the side surface portion 81 are connected to each other.

[0038] The second mounting portion 82 has a plurality of power feed holes 83 (two in the illustrated example) into which the power feed pins 7 of the lamp 2 are inserted. Each of the plurality of power feed holes 83 has an arc shape centered on the center O2 of the second mounting portion 82 (see FIGS. 5 and 6). Each power feed hole 83 includes a round hole 831 and an elongated hole 832 (see FIG. 5). The round hole 831 and the elongated hole 832 are connected. The round hole 831 is formed at one end of the power feed hole 83. The round hole 831 is larger than the tip 72 of the power feed pin 7. More specifically, the diameter of the round hole 831 is longer than the diameter of the tip 72 of the power feed pin 7. The elongated hole 832 is formed to extend from the round hole 831 toward the other end of the power feed hole 83. The elongated hole 832 is larger than the shaft portion 71 of the power feed pin 7 but smaller than the tip 72 of the power feed pin 7. More specifically, the width of slot 832 in the direction perpendicular to the arc direction is longer than the diameter of shaft 71 of feed pin 7 and shorter than the diameter of tip 72 of feed pin 7. Second installation portion 82 also has a through-hole 88.

[0039] (2.2.2) Contact The socket 3 includes a plurality of contacts that are electrically connected to the plurality of power supply pins 7. The plurality of contacts are housed in a socket body 8. The plurality of contacts are arranged within the socket body 8 so as to come into contact with and be electrically connected to the plurality of power supply pins 7 when the lamp 2 is attached to the socket 3.

[0040] (2.3) Installing the lamp in the socket The lamp 2 is attached to the socket 3 by rotating the lamp 2 and the socket 3 relative to each other with the plurality of power supply pins 7 inserted into the plurality of power supply holes 83, respectively.

[0041] (2.4) Installation to the fixture body The socket 3 is attached to the fixture body 91 (see FIG. 15 ), for example, at one end of the side surface 81 of the socket body 8. With the socket 3 attached to the fixture body 91, the feed pin 7 of the lamp 2 is inserted into the round hole 831 of the feed hole 83 of the socket 3. When the lamp 2 including the feed pin 7 is then rotated, the feed pin 7 moves from the round hole 831 to the elongated hole 832, and finally the feed pin 7 is positioned at the other end of the feed hole 83. In this way, the lamp 2 is attached to the socket 3. At this time, the feed pin 7 comes into contact with the contact of the socket 3, establishing electrical continuity.

[0042] (3) Details of the first and second installation sections Next, the first mounting portion 54 of the lamp 2 and the second mounting portion 82 of the socket 3 will be described in detail.

[0043] As shown in FIGS. 2 to 4, the first mounting portion 54 of the lamp 2 has a first identification protrusion 56. The first identification protrusion 56 is formed in the central region of the first mounting portion 54. The central region of the first mounting portion 54 is a region that includes the center O1 of the first mounting portion 54. More specifically, the central region of the first mounting portion 54 is a region that is located closer to the center than the multiple power feed pins 7 on a line that passes through the center O1 of the first mounting portion 54 and connects two points on the outer circumferential edge 541.

[0044] The first identification protrusion 56 has a size corresponding to the allowable range of the first characteristic (specified characteristic) of the lamp 2. The larger the allowable range of the first characteristic, the smaller the first identification protrusion 56 is.

[0045] In the first embodiment, the height H1 of the first identification ridge 56 varies depending on the allowable range of the first characteristic of the lamp 2. More specifically, the height H1 of the first identification ridge 56 varies depending on the allowable range of the input power of the lamp 2. For example, when the input power of the lamp 2 is P1, the height H1 of the first identification ridge 56 is 7.5 mm, and when the input power of the lamp 2 is P2 (P2>P1), the height H1 of the first identification ridge 56 is 10 mm. When the input power of the lamp 2 is P3 (P3>P2), the height H1 of the first identification ridge 56 is 12.5 mm, and when the input power of the lamp 2 is P4 (P4>P3), the height H1 of the first identification ridge 56 is 15 mm.

[0046] As an example, a lamp 2 with input power P1 is a lamp that emits light with a brightness (luminous flux) similar to that of a 40W incandescent bulb, and a lamp 2 with input power P2 is a lamp that emits light with a brightness (luminous flux) similar to that of a 65W incandescent bulb. A lamp 2 with input power P3 is a lamp that emits light with a brightness (luminous flux) similar to that of a 100W incandescent bulb, and a lamp 2 with input power P4 is a lamp that emits light with a brightness (luminous flux) similar to that of a 200W incandescent bulb. Note that the type of input power of the lamp 2 is not limited to the above examples and may be other than those mentioned above.

[0047] The height H1 of the first identification protrusion 56 of the lamp 2 is not limited to the above-mentioned value, as long as the height H1 of the first identification protrusion 56 increases as the input power of the lamp 2 increases.

[0048] As shown in FIGS. 5 to 7, the second installation portion 82 of the socket 3 has a first identification recess 84. The first identification recess 84 is formed in a central region of the second installation portion 82. The central region of the second installation portion 82 is a region that includes the center O2 of the second installation portion 82. More specifically, the central region of the second installation portion 82 is a region that is located closer to the center than the multiple power supply holes 83 on a line that passes through the center O2 of the second installation portion 82 and connects two points on the outer circumferential edge 821.

[0049] The first identification recess 84 has a size that allows the first identification protrusion 56 to be inserted therein. More specifically, the first identification recess 84 is sized so that the first identification protrusion 56 of a lamp 2 of a type that is acceptable to the socket 3 for the first characteristic among multiple types of lamps 2 including the lamp 2 can be inserted therein. Furthermore, the first identification recess 84 is sized so that the first identification protrusion 56 of a lamp 2 of a type that is unacceptable to the socket 3 for the first characteristic among multiple types of lamps 2 cannot be inserted therein.

[0050] In the first embodiment, the depth L1 of the first identification recess 84 varies depending on the first characteristic of the lamp 2 that the socket 3 allows. More specifically, the depth L1 of the first identification recess 84 varies depending on the input power of the lamp 2 that the socket 3 allows. For example, when the input power of the lamp 2 is P1, the depth L1 of the first identification recess 84 is 7.5 mm, and when the input power of the lamp 2 is P2, the depth L1 of the first identification recess 84 is 10 mm. Furthermore, when the input power of the lamp 2 is P3, the depth L1 of the first identification recess 84 is 12.5 mm, and when the input power of the lamp 2 is P4, the depth L1 of the first identification recess 84 is 15 mm.

[0051] When the first identification protrusion 56 of the lamp 2 is inserted into the first identification recess 84 of the socket 3, a gap is preferably present between the first identification recess 84 and the first identification protrusion 56. This gap is, for example, approximately 0.5 mm. Based on the above, it is preferable that the depth L1 of the first identification recess 84 be greater than the height H1 of the first identification protrusion 56 by, for example, approximately 0.5 mm. In this case, when the input power of the lamp 2 is P1, the depth L1 of the first identification recess 84 is 8 mm. When the input power of the lamp 2 is P2, the depth L1 of the first identification recess 84 is 10.5 mm. When the input power of the lamp 2 is P3, the depth L1 of the first identification recess 84 is 13 mm. When the input power of the lamp 2 is P4, the depth L1 of the first identification recess 84 is 15.5 mm. The gap between the first identification recess 84 and the first identification protrusion 56 is not limited to 0.5 mm and can be any value that can be selected as appropriate.

[0052] The depth L1 of the first identification recess 84 of the socket 3 is not limited to the above-mentioned value. It is sufficient that the greater the input power of the lamp 2 that the socket 3 allows, the deeper the depth L1 of the first identification recess 84.

[0053] From the above, if the socket 3 is of input power P1 type, a lamp 2 of input power P1 can be attached to the socket 3, but a lamp 2 of input power P2 cannot be attached to the socket 3. On the other hand, if the socket 3 is of input power P4 type, a lamp 2 of input power P4 can be attached to the socket 3. Furthermore, a lamp 2 of input power P3 can also be attached to the socket 3. Furthermore, a lamp 2 of input power P1 and a lamp 2 of input power P2 can both be attached to the socket 3.

[0054] 2, the first mounting portion 54 of the lamp 2 has a plurality of (two in the illustrated example) second identification recesses 57. The plurality of second identification recesses 57 are formed in the outer circumferential region of the first mounting portion 54. The outer circumferential region of the first mounting portion 54 is, for example, a region located on the outer circumferential side of the plurality of power supply pins 7 on a line that passes through the center O1 of the first mounting portion 54 and connects two points on the outer circumferential edge 541. In the example of FIG. 2, each second identification recess 57 is provided on the periphery of the lamp body 5.

[0055] Each second identification recess 57 corresponds to a second characteristic of the lamp 2. The position of each second identification recess 57 differs depending on the second characteristic of the lamp 2. More specifically, the position of each second identification recess 57 differs depending on the magnitude of the input voltage that can be input to the lamp 2.

[0056] In the first embodiment, the position angle θ1, which indicates the position of the second identification recess 57 relative to the reference position, varies depending on the magnitude of the input voltage of the lamp 2. The reference position is, for example, a line connecting the center O1 of the first installation portion 54 and the power supply pin 7. In other words, the relative position of the second identification recess 57 and the power supply pin 7 on the lamp 2 varies depending on the second characteristic. For example, when the input voltage of the lamp 2 is 100 V, the position angle θ1 of the second identification recess 57 is 0°. When the input voltage of the lamp 2 is 200 V, the position angle θ1 of the second identification recess 57 is 45°. When the input voltage of the lamp 2 is an overseas voltage, the position angle θ1 of the second identification recess 57 is 90°. When the input voltage of the lamp 2 is another voltage, the position angle θ1 of the second identification recess 57 is 135°.

[0057] 6, the second installation portion 82 of the socket 3 has a plurality of (two in the illustrated example) second identification protrusions 85. The plurality of second identification protrusions 85 are recesses that can be fitted into the second identification recesses 57, and are formed in the outer circumferential region of the second installation portion 82. The outer circumferential region of the second installation portion 82 is, for example, a region that is located on the outer circumferential side of the plurality of power supply holes 83 on a line that passes through the center O2 of the second installation portion 82 and connects two points on the outer circumferential edge 821.

[0058] Each second identification ridge 85 corresponds to a second characteristic that the socket 3 allows for with respect to the second characteristic of the lamp 2. The position of each second identification ridge 85 differs depending on the second characteristic that the socket 3 allows for with respect to the second characteristic of the lamp 2. More specifically, the position of each second identification ridge 85 differs depending on the magnitude of the input voltage input to the lamp 2.

[0059] In the first embodiment, the position angle θ2, which indicates the position of the second identification ridge 85 relative to the reference position, varies depending on the magnitude of the input voltage of the lamp 2. The reference position is, for example, a straight line connecting the center O2 of the second installation portion 82 and the other end of the power feed hole 83. In other words, the relative position of the second identification ridge 85 and the power feed hole 83 in the socket 3 varies depending on the type of lamp 2 that the socket 3 accepts for the second characteristic among multiple types of lamps 2. For example, when the input voltage of the lamp 2 is 100 V, the position angle θ2 of the second identification ridge 85 is 0°. When the input voltage of the lamp 2 is 200 V, the position angle θ2 of the second identification ridge 85 is 45°. When the input voltage of the lamp 2 is for overseas use, the position angle θ2 of the second identification ridge 85 is 90°. When the input voltage of the lamp 2 is other than that, the position angle θ2 of the second identification ridge 85 is 135°.

[0060] From the above, if socket 3 is for 100V, lamp 2 for an input voltage of 100V can be attached to socket 3, but lamp 2 for an input voltage of 200V cannot be attached to socket 3. Similarly, if socket 3 is for 200V, lamp 2 for an input voltage of 200V can be attached to socket 3, but lamp 2 for an input voltage of 100V cannot be attached to socket 3.

[0061] If the lamp 2 accepts both 100V and 200V input voltages, the second identification recess 57 is provided at both positions where the position angle θ1 is 0° and 45°. Similarly, if the lamp 2 accepts both 200V and overseas voltages, the second identification recess 57 is provided at both positions where the position angle θ1 is 45° and 90°. In short, the lamp 2 has second identification recesses 57 corresponding to the accepted input voltages.

[0062] The size of the second identification recess 57 of the lamp 2 varies depending on the third characteristic of the lamp 2. The second identification recess 57 is larger as the tolerance range of the third characteristic of the lamp 2 is larger.

[0063] In the first embodiment, the size of the second identification recess 57 varies depending on whether the lamp 2 is dimmable. More specifically, the width W1 of the second identification recess 57 in the radial direction of the first installation portion 54 varies depending on whether the lamp 2 is dimmable. For example, if the lamp 2 has a dimming function, the width W1 of the second identification recess 57 is 3 mm. If the lamp 2 does not have a dimming function, the width W1 of the second identification recess 57 is 1.5 mm.

[0064] The size of the second identification protrusion 85 of the socket 3 varies depending on the third characteristic of the lamp 2 that the socket 3 allows. The second identification protrusion 85 is sized so that it can be inserted into the second identification recess 57 of a type of lamp 2 that the socket 3 allows for the third characteristic, among the multiple types of lamps 2. The second identification protrusion 85 is sized so that it cannot be inserted into the second identification recess 57 of a type of lamp 2 that the socket 3 does not allow for the third characteristic, among the multiple types of lamps 2.

[0065] In the first embodiment, this differs depending on whether the socket 3 is dimmable. More specifically, the radial width W2 of the second installation portion 82 of the second identification protrusion 85 differs depending on whether the socket 3 is dimmable. For example, if the socket 3 has a dimming function, the width W2 of the second identification protrusion 85 is 3 mm. If the socket 3 does not have a dimming function, the width W2 of the second identification protrusion 85 is 1.5 mm.

[0066] It is preferable that a gap exists between the second identification recess 57 and the second identification protrusion 85 of the socket 3 when the second identification recess 57 of the lamp 2 is inserted into the second identification protrusion 85. This gap is, for example, approximately 0.5 mm. Based on the above, it is preferable that the width W1 of the second identification recess 57 is larger than the width W2 of the second identification protrusion 85 by, for example, approximately 0.5 mm. In this case, if the lamp 2 is dimmable, the width W1 of the second identification recess 57 is 3.5 mm, and if the lamp 2 is not dimmable, the width W1 of the second identification recess 57 is 2 mm. It is to be noted that the gap between the second identification recess 57 and the second identification protrusion 85 is not limited to 0.5 mm and can be any value that can be selected as appropriate.

[0067] From the above, if the socket 3 does not have a dimming function, it is possible to attach either a lamp 2 without a dimming function or a lamp 2 with a dimming function to this socket 3. On the other hand, if the socket 3 has a dimming function, it is possible to attach a lamp 2 with a dimming function to this socket 3, but it is not possible to attach a lamp 2 without a dimming function.

[0068] A lamp 2 with a dimming function can be attached to either a socket 3 with a dimming function or a socket 3 without a dimming function. On the other hand, a lamp 2 without a dimming function can be attached to a socket 3 without a dimming function, but cannot be attached to a socket 3 with a dimming function.

[0069] (4) Effects In the lamp unit 1 according to the first embodiment, the first identification protrusion 56 of the lamp 2 is smaller as the tolerance range for the first characteristic becomes larger. Furthermore, the first identification recess 84 of the socket 3 is sized so that the first identification protrusion 56 of a lamp 2 of a type that the socket 3 can accept for the first characteristic out of the multiple types of lamps 2 can be inserted, and is sized so that the first identification protrusion 56 of a lamp of a type that the socket 3 cannot accept for the first characteristic out of the multiple types of lamps 2 can not be inserted. This reduces the possibility of erroneous installation of a lamp 2 that is incompatible with the first characteristic into the socket 3.

[0070] In the lamp unit 1 according to the first embodiment, the first identification protrusion 56 is provided in an area that is closer to the center O1 than the multiple power feed pins 7 and that includes the center O1. As a result, the first identification protrusion 56 is provided in a position that does not interfere with the rotation of the power feed pins 7 and the lamp 2, so that the rotation of the lamp 2 is not interfered with and additional space is not required for the first identification protrusion 56.

[0071] In the lamp unit 1 according to the first embodiment, the relative position (position angle θ1) between the second identification recess 57 and the power feed pin 7 in the lamp 2 varies depending on the second characteristic of the lamp 2. Furthermore, the relative position (position angle θ2) between the second identification protrusion 85 and the power feed hole 83 in the socket 3 varies depending on the type of lamp 2 that the socket 3 accepts for the second characteristic among multiple types of lamps 2. This reduces the possibility of incorrectly inserting an incompatible lamp 2 into the socket 3 not only for the first characteristic but also for the second characteristic.

[0072] In the lamp unit 1 according to the first embodiment, the second identification recess 57 is provided on the peripheral edge (outer peripheral edge 541) of the lamp body 5. This allows the second identification recess 57 to be provided at a position that does not interfere with the placement of the power supply pin 7.

[0073] In the lamp unit 1 according to the first embodiment, the second characteristic of the lamp 2 is the magnitude of the input voltage that can be input to the lamp 2. This reduces the occurrence of problems such as the input voltage to the lamp 2 being low.

[0074] In the lamp unit 1 according to the first embodiment, the second identification recess 57 of the lamp 2 is larger as the tolerance range of the third characteristic of the lamp 2 increases. Furthermore, the second identification protrusion 85 of the socket 3 is sized so that it can be inserted into the second identification recess 57 of a lamp 2 of a type that the socket 3 can accept for the third characteristic among the plurality of types of lamps 2, and cannot be inserted into the second identification recess 57 of a lamp 2 of a type that the socket 3 cannot accept for the third characteristic among the plurality of types of lamps 2. This reduces the possibility of erroneous installation of an incompatible lamp 2 into the socket 3 not only in terms of the first and second characteristics but also in terms of the third characteristic.

[0075] In the lamp unit 1 according to the first embodiment, the first characteristic is the amount of input power that can be input to the lamp 2, and the third characteristic is whether the lamp 2 has a dimming function or not. This reduces the possibility of incorrect installation of the lamp 2 and the socket 3, which are characteristics that have a large impact on the lamp 2 and the socket 3.

[0076] In the lamp unit 1 according to the first embodiment, the first characteristic is the amount of input power that can be input to the lamp 2. This reduces the possibility of incorrect installation of the characteristics that have a large effect on the lamp 2 and the socket 3.

[0077] (5) Variations A modification of the first embodiment will be described below.

[0078] (5.1) Variation 1 As a first modification of the first embodiment, the lamp unit 1b may include a lamp 2b and a socket 3b as shown in Fig. 8. In the lamp unit 1b, the lamp body 5b of the lamp 2b has a first identification recess 56b instead of the first identification protrusion 56. The socket body 8b of the socket 3b has a first identification protrusion 84b instead of the first identification recess 84. In the first embodiment, the lamp body 5 has the first identification protrusion 56 and the socket body 8 has the first identification recess 84, whereas in the first modification, the lamp body 5b has the first identification recess 56b and the socket body 8b has the first identification protrusion 84b.

[0079] In the first modification, the first identification recess 56b of the lamp body 5b has a size corresponding to the tolerance range of the first characteristic of the lamp 2b. The larger the tolerance range of the first characteristic, the larger the first identification recess 56b of the lamp body 5b.

[0080] Specifically, the depth L3 of the first identification recess 56b varies depending on the allowable range of the first characteristic of the lamp 2b. More specifically, the depth L3 of the first identification recess 56b varies depending on the allowable range of the input power of the lamp 2b.

[0081] On the other hand, the first identification protrusion 84b of the socket body 8b is sized so that it can be inserted into the first identification recess 56b of a lamp 2b of a type that the socket 3b accepts for the first characteristic among the multiple types of lamps 2b including the lamp 2b, and is sized so that it cannot be inserted into the first identification recess 56b of a lamp 2b of a type that the socket 3b cannot accept for the first characteristic among the multiple types of lamps 2b.

[0082] Specifically, the height H1 of the first identification protrusion 84b varies depending on the first characteristic of the lamp 2b that the socket 3b allows. More specifically, the height H3 of the first identification protrusion 84b varies depending on the input power of the lamp 2b that the socket 3b allows.

[0083] (5.2) Variation 2 As a second modification of the first embodiment, a lamp unit 1c may include a lamp 2c and a socket 3c as shown in Fig. 9. In the lamp unit 1c, the lamp body 5c of the lamp 2c has a second identification protrusion 57c instead of the second identification recess 57. The socket body 8c of the socket 3c has a second identification protrusion 85c instead of the second identification protrusion 85. In the first embodiment, the lamp body 5b has the second identification protrusion 57 and the socket body 8 has the second identification protrusion 85, whereas in the second modification, the lamp body 5c has the second identification protrusion 57c and the socket body 8c has the second identification protrusion 85c.

[0084] In the second modification, each second identification ridge 57c of the lamp 2c corresponds to a second characteristic of the lamp 2c. The position of each second identification ridge 57c varies depending on the second characteristic of the lamp 2c. More specifically, the position of each second identification ridge 57c varies depending on the magnitude of the input voltage that can be input to the lamp 2c.

[0085] Each second identification recess 85c of the socket 3c corresponds to a second characteristic of the lamp 2c that the socket 3c allows. The position of each second identification recess 85c varies depending on the second characteristic of the lamp 2c that the socket 3c allows. More specifically, the position of each second identification recess 85c varies depending on the magnitude of the input voltage input to the lamp 2c.

[0086] In the second modification, the second distinguishing protrusion 57c of the lamp body 5c has a size corresponding to the allowable range of the third characteristic of the lamp 2c. The larger the allowable range of the third characteristic, the smaller the second distinguishing protrusion 57c of the lamp body 5c.

[0087] Specifically, the height H3 of the second identification ridge 57c varies depending on the allowable range of the third characteristic of the lamp 2c. More specifically, the height H3 of the second identification ridge 57c varies depending on the allowable range of the input power of the lamp 2b.

[0088] On the other hand, the second identification recess 85c of the socket body 8c is sized so that it can be inserted into the second identification protrusion 57c of a lamp 2c of a type that the socket 3c accepts for the third characteristic among the multiple types of lamps 2c including the lamp 2c, and is sized so that it cannot be inserted into the second identification protrusion 57c of a lamp 2c of a type that the socket 3c cannot accept for the third characteristic among the multiple types of lamps 2c.

[0089] Specifically, the depth L3 of the second identification recess 85c varies depending on the allowable range of the third characteristic of the lamp 2c. More specifically, the depth L3 of the second identification recess 85c varies depending on the allowable range of the input power of the lamp 2c.

[0090] (5.3) Variation 3 As a third modification of the first embodiment, in the lamp unit 1, the first characteristic may be whether or not the lamp 2 has a dimming function, and the third characteristic may be the magnitude of the input power. In the lamp unit 1 according to the third modification, it is also possible to reduce the possibility of incorrect installation of the lamp 2 and the socket 3, which are characteristics that have a large effect on the lamp 2 and the socket 3.

[0091] (5.4) Variation 4 As a fourth modification of the first embodiment, the areas of both the first identification protrusion 56 and the first identification recess 84 when viewed in plan from the first direction D1 may be changed in accordance with the first characteristic (input power). In the fourth modification, instead of the height H1 of the first identification protrusion 56 and the depth L1 of the first identification recess 84, the areas of both the first identification protrusion 56 and the first identification recess 84 when viewed in plan from the first direction D1 are changed in accordance with the first characteristic.

[0092] Furthermore, when the first identification protrusion 56 and the first identification recess 84 are circular, the diameters of both the first identification protrusion 56 and the first identification recess 84 in a planar view from the first direction D1 may be changed depending on the first characteristic of the lamp 2 (the input power of the lamp 2).

[0093] In short, the size of the first identification ridge 56 of the lamp 2 is the height H1 of the first identification ridge 56, the area of ​​the first identification ridge 56 in plan view from the first direction D1, and, if the first identification ridge 56 is circular, the diameter of the first identification ridge 56. The size of the first identification recess 84 of the socket 3 is the depth L1 of the first identification recess 84, the area of ​​the first identification recess 84 in plan view from the first direction D1, and, if the first identification recess 84 is circular, the diameter of the first identification recess 84.

[0094] (5.5) Other variations As another modification of the first embodiment, the light source 4 is not limited to an LED, and may be another light emitting element. The light source 4 may be, for example, an organic EL (Electro Luminescence) element.

[0095] The lamp unit 1 according to each of the above modifications also provides the same effects as the lamp unit 1 according to the first embodiment.

[0096] (Embodiment 2) As shown in Figures 10 to 12, the lamp unit 1a of embodiment 2 differs from the lamp unit 1 of embodiment 1 (see Figure 1) in that it has multiple types (two types in the illustrated example) of second identification recesses 58, 59 and multiple types (two types in the illustrated example) of second identification protrusions 86, 87.

[0097] (1) Lamp unit As shown in Fig. 10, the lamp unit 1a according to the second embodiment includes a lamp 2a and a socket 3a. Like the lamp unit 1 according to the first embodiment, the lamp unit 1a is used in, for example, a lighting fixture 9 (see Fig. 15). Note that, with respect to the lamp unit 1 according to the second embodiment, components similar to those of the lamp unit 1 according to the first embodiment are denoted by the same reference numerals and descriptions thereof will be omitted.

[0098] (2) Each component of the lamp unit Hereinafter, each component of the lamp unit 1a according to the second embodiment will be described with reference to the drawings.

[0099] (2.1) Lamp The lamp 2a has a lamp body 5a as shown in Figures 10 and 11 instead of the lamp body 5 of the first embodiment (see Figure 1). Similarly to the lamp 2 of the first embodiment (see Figure 1), the lamp 2a also has a light source 4, a cover 6, and a plurality of (two in the illustrated example) power supply pins 7. Note that, with regard to the lamp 2a of the second embodiment, explanations of the same configurations and functions as those of the lamp 2 of the first embodiment (see Figure 1) will be omitted.

[0100] (2.1.1) Lamp body 10 and 11, the lamp body 5a accommodates the light source 4, similar to the lamp body 5 of the first embodiment. The lamp body 5a is made of, for example, resin.

[0101] The lamp body 5a has a first side surface portion 51, an annular portion 52, a second side surface portion 53, and a first mounting portion 54a. In the second embodiment, the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54a are integrally formed. That is, the lamp body 5a is formed from a single member. Note that the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54a are not limited to being integrally formed, and may be formed separately. Alternatively, at least two of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54a may be formed separately. That is, the lamp body 5a may be formed from a plurality of members. Furthermore, each of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first mounting portion 54a may be formed from a single member or a plurality of members.

[0102] As shown in FIG. 11, the first installation portion 54a has a plate shape, similar to the first installation portion 54 of the first embodiment (see FIG. 2). In the example of FIG. 11, the first installation portion 54a has a disk shape. The first installation portion 54a has an outer peripheral edge 541 that forms the outer periphery of the first installation portion 54a. The first installation portion 54a is provided at one end of the second side surface portion 53. The outer peripheral edge 541 of the first installation portion 54a is connected to one end of the second side surface portion 53. The first installation portion 54a has multiple (two in the illustrated example) through holes 55 through which the power feed pins 7 pass, similar to the first installation portion 54 of the first embodiment.

[0103] (2.2) Socket As shown in FIG. 10, the socket 3a has a socket body 8a.

[0104] (2.2.1) Socket body The socket body 8a, like the socket body 8 of the first embodiment (see Fig. 1), has a cylindrical shape with a bottom, as shown in Figs. 12 to 14. The socket body 8a is made of, for example, resin.

[0105] The socket body 8a has a side surface portion 81 and a second installation portion 82a. In the second embodiment, the side surface portion 81 and the second installation portion 82a are integrally formed. That is, the socket body 8a is configured from a single member. Note that the side surface portion 81 and the second installation portion 82a are not limited to being integrally formed, and may be formed separately. That is, the socket body 8a may be configured from a plurality of members. Furthermore, each of the side surface portion 81 and the second installation portion 82a may be configured from a single member or a plurality of members.

[0106] As shown in Figures 12 to 14, the second mounting portion 82a has a plate shape. In the example of Figure 12, the second mounting portion 82a has a disk shape. The second mounting portion 82a has an outer periphery edge 821 that forms the outer periphery of the second mounting portion 82a. The second mounting portion 82a is provided at the other end of the side surface portion 81. The outer periphery edge 821 of the second mounting portion 82a is connected to the other end of the side surface portion 81. Like the second mounting portion 82 in embodiment 1, the second mounting portion 82a has multiple power supply holes 83 (two in the illustrated example) into which the power supply pins 7 of the lamp 2a are inserted.

[0107] The socket 3a is attached to the fixture body 91 (see FIG. 15 ), for example, at one end of the side surface 81 of the socket body 8a. With the socket 3a attached to the fixture body 91, the feed pin 7 of the lamp 2a is inserted into the round hole 831 of the feed hole 83 of the socket 3a. When the lamp 2a including the feed pin 7 is then rotated, the feed pin 7 moves from the round hole 831 to the elongated hole 832, and finally the feed pin 7 is positioned at the other end of the feed hole 83. In this way, the lamp 2a is attached to the socket 3a.

[0108] (3) Details of the first and second installation sections Next, the first mounting portion 54a of the lamp 2a and the second mounting portion 82a of the socket 3a will be described in detail.

[0109] 11, the first mounting portion 54a of the lamp 2a has a first identification protrusion 56, similar to the first mounting portion 54 of the lamp 2 of embodiment 1. The height H1 of the first identification protrusion 56 of embodiment 2 is specified in the same manner as the height H1 of the first identification protrusion 56 of embodiment 1, and therefore will not be described again.

[0110] 12 to 14, the second installation portion 82a of the socket 3a has a first identification recess 84, similar to the second installation portion 82 of the socket 3 of embodiment 1. The depth L1 of the first identification recess 84 of embodiment 2 is specified in the same manner as the depth L1 of the first identification recess 84 of embodiment 1, and therefore description thereof will be omitted.

[0111] 11, the first mounting portion 54a of the lamp 2a has a second identification recess 58, similar to the first mounting portion 54 of the lamp 2 of embodiment 1. The depth L2 of the second identification recess 58 of embodiment 2 is specified in the same manner as the depth L2 of the second identification recess 58 of embodiment 1, and therefore will not be described again.

[0112] 12 to 14, the second installation portion 82a of the socket 3a has a second identification protrusion 86, similar to the second installation portion 82 of the socket 3 of embodiment 1. The height H2 of the second identification protrusion 86 of embodiment 2 is specified in the same manner as the height H2 of the second identification protrusion 85 of embodiment 1, and therefore description thereof will be omitted.

[0113] As shown in FIG. 11, the first installation portion 54a of the lamp 2a of the second embodiment has a second identification recess 59 in addition to the second identification recess 58.

[0114] Each second identification recess 59 corresponds to a third characteristic of the lamp 2a. The size of the second identification recess 59 varies depending on whether the lamp 2a is dimmable. More specifically, the radial width W3 of the first mounting portion 54a in each second identification recess 59 varies depending on whether the lamp 2a is dimmable. For example, if the lamp 2a has a dimming function, the width W3 of the second identification recess 59 is 3 mm. If the lamp 2a does not have a dimming function, the width W3 of the second identification recess 59 is 1.5 mm.

[0115] Furthermore, the second installation portion 82a of the socket 3a of the second embodiment has a second identification protrusion 87 in addition to the second identification protrusion 86, as shown in FIGS.

[0116] Each second identification protrusion 87 corresponds to a third characteristic of the lamp 2 that is acceptable to the socket 3a. The size of the second identification protrusion 87 varies depending on whether the socket 3a is dimmable. More specifically, the radial width W4 of the second installation portion 82a of the second identification protrusion 87 varies depending on whether the socket 3a is dimmable. For example, if the socket 3a has a dimming function, the width W4 of the second identification protrusion 87 is 3 mm. If the socket 3a does not have a dimming function, the width W4 of the second identification protrusion 87 is 1.5 mm.

[0117] It is preferable that a gap exists between the second identification recess 59 and the second identification protrusion 87 of the socket 3 when the second identification recess 59 of the lamp 2 is inserted into the second identification protrusion 87. This gap is, for example, approximately 0.5 mm. Based on the above, it is preferable that the width W3 of the second identification recess 59 is larger than the width W4 of the second identification protrusion 87 by, for example, approximately 0.5 mm. In this case, if the lamp 2 is dimmable, the width W3 of the second identification recess 59 is 3.5 mm, and if the lamp 2 is not dimmable, the width W3 of the second identification recess 59 is 2 mm. It is to be noted that the gap between the second identification recess 59 and the second identification protrusion 87 is not limited to 0.5 mm and can be any value that can be selected as appropriate.

[0118] From the above, if the socket 3a does not have a dimming function, it can be fitted with either a lamp 2a with or without a dimming function. On the other hand, if the socket 3a has a dimming function, it can be fitted with a lamp 2a with a dimming function, but it cannot be fitted with a lamp 2a without a dimming function.

[0119] The dimmable lamp 2a can be attached to either a dimmable socket 3a or a socket 3a without dimming function. On the other hand, the non-dimmable lamp 2a can be attached to a socket 3a without dimming function, but cannot be attached to a socket 3a with dimming function.

[0120] (4) Effects In the lamp unit 1a according to the second embodiment, as in the lamp unit 1 according to the first embodiment, the first identification protrusion 56 of the lamp 2 becomes smaller as the tolerance range of the first characteristic becomes larger. Furthermore, the first identification recess 84 of the socket 3 is sized so that the first identification protrusion 56 of a lamp 2 of a type that the socket 3 can accept for the first characteristic out of the multiple types of lamps 2 can be inserted, and is sized so that the first identification protrusion 56 of a lamp of a type that the socket 3 cannot accept for the first characteristic out of the multiple types of lamps 2 can not be inserted. This reduces the possibility of erroneous installation of a lamp 2 that is incompatible with the first characteristic into the socket 3.

[0121] (5) Variations A modification of the second embodiment will be described below.

[0122] As a first modification of the second embodiment, the depth of the second identification recess 59 of the lamp 2a and the height of the second identification protrusion 87 of the socket 3a may be changed according to the third characteristic (dimming function). In the first modification, the depth of the second identification recess 59 and the height of the second identification protrusion 87 are changed according to the third characteristic, rather than the width W3 of the second identification recess 59 and the width W4 of the second identification protrusion 87.

[0123] As a second modification of the second embodiment, the presence or absence of the second identification recess 59 of the lamp 2a and the presence or absence of the second identification protrusion 87 of the socket 3a may be changed depending on the third characteristic (dimming function). The second modification is an example of the first modification in which the depth of the second identification recess 59 and the height of the second identification protrusion 87 are changed, and the depth of the second identification recess 59 and the height of the second identification protrusion 87 are both zero.

[0124] If the lamp 2a is dimmable, the lamp 2a has the second identification recess 59, and if the lamp 2a is not dimmable, the lamp 2a does not have the second identification recess 59. On the other hand, if the socket 3a is dimmable, the socket 3a has the second identification protrusion 87, and if the socket 3a is not dimmable, the socket 3a does not have the second identification protrusion 87.

[0125] In the first and second modifications, if the socket 3a does not have a dimming function, then either a lamp 2a with or without a dimming function can be attached to the socket 3a. On the other hand, if the socket 3a has a dimming function, then a lamp 2a with a dimming function can be attached to the socket 3a, but a lamp 2a without a dimming function cannot be attached.

[0126] The dimmable lamp 2a can be attached to either a dimmable socket 3a or a socket 3a without dimming function. On the other hand, the non-dimmable lamp 2a can be attached to a socket 3a without dimming function, but cannot be attached to a socket 3a with dimming function.

[0127] As another modification of the second embodiment, each modification of the first embodiment may be applied to the lamp unit 1a.

[0128] The lamp unit 1a according to each of the above-described modifications also provides the same effects as the lamp unit 1a according to the second embodiment.

[0129] (Embodiment 3) In the third embodiment, a lighting fixture 9 using the lamp unit 1 will be described. Note that, with respect to the lamp unit 1 according to the third embodiment, the same components as those of the lamp unit 1 according to the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

[0130] (1) Composition 15, the lighting fixture 9 according to the third embodiment includes a lamp unit 1, a fixture body 91, and a power supply circuit 92. Note that, with regard to the lamp unit 1 according to the third embodiment, a description of the same configuration and functions as those of the lamp unit 1 according to the first embodiment (see FIG. 1) will be omitted.

[0131] The fixture body 91 shown in FIG. 15 holds the socket 3. The fixture body 91 is made of, for example, metal, and has a cylindrical shape with a bottom. The fixture body 91 has a bottom surface portion 911 and side surfaces 912. The bottom surface portion 911 has a disk shape. The socket 3 of the lamp unit 1 is attached to the bottom surface portion 911. The lamp 2 is attached to the socket 3 attached to the bottom surface portion 911. The side surface portion 912 has a cylindrical shape and is provided to protrude from the outer peripheral edge of the bottom surface portion 911 along the first direction D1. The fixture body 91 houses the lamp unit 1 in its internal space.

[0132] The power supply circuit 92 shown in FIG. 15 supplies load power to the light source 4 by receiving power from an external power source. The external power source may be, for example, a 100V or 200V commercial power system, a power generation device that generates power using renewable energy, or a secondary battery. As indicated by the dashed line in FIG. 15, the power supply circuit 92 is housed in, for example, the socket body 8 of the socket 3. Note that, as indicated by the two-dot chain line in FIG. 15, the power supply circuit 92 may be housed in the lamp body 5 of the lamp 2 instead of the socket body 8 of the socket 3. In this case, an input voltage of a commercial power system, for example, a 100V or 200V system, is input from the socket 3 to the lamp 2 via the power feed pin 7, and the power supply circuit 92 housed in the lamp body 5 supplies load power to the light source 4 for lighting the light source 4 using the input voltage input to the lamp 2.

[0133] Considering the expected temperature of the fixture body 91, the socket 3 needs to take into account the input power of the lamp 2. In other words, the socket 3 will accept a lamp 2 with a low input power, but will not accept a lamp 2 with a high input power. The socket 3 will accept a lamp 2 with an input power lower than the expected maximum allowable input power, but will not accept a lamp 2 with an input power exceeding the expected maximum allowable input power.

[0134] (2) Effects In the lighting fixture 9 according to the third embodiment, the first identification protrusion 56 of the lamp 2 in the lamp unit 1 is smaller as the tolerance range for the first characteristic becomes larger. Furthermore, the first identification recess 84 of the socket 3 is sized so that the first identification protrusion 56 of a lamp 2 of a type that the socket 3 can accept for the first characteristic out of the multiple types of lamps can be inserted, and is sized so that the first identification protrusion 56 of a lamp 2 of a type that the socket 3 cannot accept for the first characteristic out of the multiple types of lamps 2 cannot be inserted. This reduces the possibility of erroneously installing a lamp 2 that is incompatible with the first characteristic into the socket 3.

[0135] (3) Variations As a modification of the third embodiment, the lighting fixture 9 may include the lamp unit 1a according to the second embodiment instead of the lamp unit 1.

[0136] The lighting fixture 9 according to the above-described modified example also provides the same effects as the lighting fixture 9 according to the third embodiment.

[0137] The above-described embodiments and modifications are merely a part of the various embodiments and modifications of the present disclosure. Furthermore, the embodiments and modifications can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved.

[0138] (Aspect) The present specification discloses the following aspects.

[0139] A lamp unit (1; 1a; 1c) according to a first aspect includes a lamp (2; 2a; 2c) and a socket (3; 3a; 3c). The socket (3; 3a; 3c) can accommodate the lamp (2; 2a; 2c). The lamp (2; 2a; 2c) includes a light source (4) and a lamp body (5; 5a; 5c). The lamp body (5; 5a; 5c) has the light source (4) disposed therein. The socket (3; 3a; 3c) includes a socket body (8; 8a; 8c). The lamp body (5; 5a; 5c) includes a first identification protrusion (56). The first identification protrusion (56) has a size corresponding to the allowable range of the first characteristic of the lamp (2; 2a; 2c). The socket body (8; 8a; 8c) includes a first identification recess (84). The first identification recess (84) has a size that allows the first identification protrusion (56) to be inserted therein. The larger the tolerance range of the first characteristic, the smaller the first identification protrusion (56) is. The first identification recess (84) is sized so that the first identification protrusion (56) of a lamp type that is acceptable for the socket (3; 3a; 3c) with respect to the first characteristic among the multiple types of lamps including the lamps (2; 2a; 2c) can be inserted therein, and so that the first identification protrusion (56) of a lamp type that is unacceptable for the socket (3; 3a; 3c) with respect to the first characteristic among the multiple types of lamps cannot be inserted therein.

[0140] According to the lamp unit (1; 1a; 1c) of the first aspect, the first characteristic can reduce the possibility of incorrectly installing an incompatible lamp (2; 2a; 2c) in a socket (3; 3a; 3c).

[0141] A lamp unit (1b) according to a second aspect includes a lamp (2b) and a socket (3b). The lamp (2b) can be attached to the socket (3b). The lamp (2b) includes a light source (4) and a lamp body (5b). The light source (4) is disposed in the lamp body (5b). The socket (3b) has a socket body (8b). The lamp body (5b) has a first identification recess (56b). The first identification recess (56b) has a size corresponding to the allowable range of the first characteristic of the lamp (2b). The socket body (8b) has a first identification protrusion (84b). The first identification protrusion (84b) has a size that allows it to be inserted into the first identification recess (56b). The larger the allowable range of the first characteristic, the larger the first identification recess (56b). The first identification protrusion (84b) is sized so that it can be inserted into the first identification recess (56b) of a lamp of a type that is acceptable to the socket (3b) for the first characteristic among the multiple types of lamps including the lamp (2b). The first identification protrusion (84b) is sized so that it cannot be inserted into the first identification recess (56b) of a lamp of a type that is not acceptable to the socket (3b) for the first characteristic among the multiple types of lamps.

[0142] With the lamp unit (1b) according to the second aspect, the first characteristic is that it is possible to reduce the possibility of an incompatible lamp (2b) being erroneously attached to a socket (3b).

[0143] In the lamp unit (1; 1a; 1b; 1c) according to the third aspect, in the first or second aspect, the lamp (2; 2a; 2b; 2c) further includes a power supply pin (7). The power supply pin (7) is provided on the lamp body (5; 5a; 5b; 5c) and is a pin for receiving power. The socket body (8; 8a; 8b; 8c) has a power supply hole (83) into which the power supply pin (7) can be inserted.

[0144] According to the lamp unit (1; 1a; 1b; 1c) of the third aspect, electrical conduction between the lamps (2; 2a; 2b; 2c) and the sockets (3; 3a; 3b; 3c) can be easily achieved.

[0145] In the lamp unit (1; 1a; 1c) according to the fourth aspect, in the first aspect, the lamp (2; 2a; 2c) includes a plurality of power feed pins (7). The lamp body (5; 5a; 5c) has a first mounting portion (54; 54a). The first mounting portion (54; 54a) is provided with a plurality of power feed pins (7). The socket body (8; 8a; 8c) has a plurality of power feed holes (83) corresponding to the plurality of power feed pins (7). With the plurality of power feed pins (7) inserted into the plurality of power feed holes (83), the lamp (2; 2a; 2c) and the socket (3; 3a; 3c) are rotated relative to each other, thereby attaching the lamp (2; 2a; 2c) to the socket (3; 3a; 3c). The plurality of power feed pins (7) are provided in the first installation portion (54; 54a) so as to be point symmetrical with respect to the center (O1) of the first installation portion (54; 54a). The first identification protrusion (56) is provided in the first installation portion (54; 54a) closer to the center (O1) than the plurality of power feed pins (7) and in an area including the center (O1).

[0146] According to the lamp unit (1; 1a; 1c) of the fourth aspect, the first identification protrusion (56) is provided in a position that does not interfere with the rotation of the power supply pin (7) and the lamp (2; 2a; 2c), so that the rotation of the lamp (2; 2a; 2c) is not interfered with and no additional space is required for the first identification protrusion (56).

[0147] In the lamp unit (1; 1a; 1b) according to the fifth aspect, in the third or fourth aspect, the lamp body (5; 5a) further has a second identification recess (57; 58, 59). The second identification recess (57; 58, 59) corresponds to the second characteristic in the lamp (2; 2a; 2b). The socket body (8; 8a; 8b) further has a second identification protrusion (85; 86, 87). The second identification protrusion (85; 86, 87) is fittable into the second identification recess (57; 58, 59). The relative position (position angle θ1) between the second identification recess (57; 58, 59) and the power supply pin (7) in the lamp (2; 2a; 2b) varies depending on the second characteristic. The relative position (position angle θ2) between the second identification protrusion (85; 86, 87) and the power supply hole (83) in the socket (3; 3a; 3b) varies depending on the type of lamp that the socket (3; 3a; 3b) accepts for the second characteristic among multiple types of lamps.

[0148] According to the lamp unit (1; 1a; 1b) of the fifth aspect, the possibility of incorrectly installing an incompatible lamp (2; 2a; 2b) in a socket (3; 3a; 3b) can be reduced not only for the first characteristic but also for the second characteristic.

[0149] In the lamp unit (1; 1a; 1b) according to the sixth aspect, in the fifth aspect, the second identification recess (57; 58, 59) is provided on the peripheral edge (outer peripheral edge 541) of the lamp body (5; 5a; 5b).

[0150] According to the lamp unit (1; 1a; 1b) of the sixth aspect, the second identification recess (57; 58, 59) can be provided at a position that does not interfere with the placement of the power supply pin (7).

[0151] In the lamp unit (1; 1a; 1b) according to the seventh aspect, in the fifth or sixth aspect, the second identification recess (57; 58, 59) is larger as the tolerance range of the third characteristic of the lamp (2; 2a; 2b) increases. The second identification protrusion (85; 86, 87) is sized so that it can be inserted into the second identification recess (57; 58, 59) of a lamp type among the plurality of types of lamps that is acceptable for the socket (3; 3a; 3b) in terms of the third characteristic, and is sized so that it cannot be inserted into the second identification recess (57; 58, 59) of a lamp type among the plurality of types of lamps that is not acceptable for the socket (3; 3a; 3b) in terms of the third characteristic.

[0152] According to the lamp unit (1; 1a; 1b) of the seventh aspect, the possibility of incorrectly installing an incompatible lamp (2; 2a; 2b) in a socket (3; 3a; 3b) can be reduced not only for the first and second characteristics but also for the third characteristic.

[0153] In a lamp unit (1c) according to an eighth aspect, in the third or fourth aspect, the lamp body (5c) further includes a second identification protrusion (57c). The second identification protrusion (57c) corresponds to the second characteristic of the lamp (2c). The socket body (8c) further includes a second identification recess (85c). The second identification recess (85c) is fittable with the second identification protrusion (57c). The relative position of the second identification protrusion (57c) and the power supply pin (7) in the lamp (2c) varies depending on the second characteristic. The relative position of the second identification recess (85c) and the power supply hole (83) in the socket (3c) varies depending on the type of lamp that the socket (3c) accepts for the second characteristic among multiple types of lamps.

[0154] In a lamp unit (1c) according to a ninth aspect, in the eighth aspect, the second identification protrusion (57c) is provided on the periphery of the lamp body (5c).

[0155] In a lamp unit (1c) according to a tenth aspect, in the eighth or ninth aspect, the second identification protrusion (57c) is smaller as the tolerance range of the third characteristic of the lamp (2c) increases. The second identification recess (85c) is sized so that the second identification protrusion (57c) of a lamp of a type that is acceptable for the socket (3c) in terms of the third characteristic among the plurality of types of lamps can be inserted, and is sized so that the second identification protrusion (57c) of a lamp of a type that is not acceptable for the socket (3c) in terms of the third characteristic among the plurality of types of lamps cannot be inserted.

[0156] In the lamp unit (1; 1a; 1b; 1c) according to the eleventh aspect, in the seventh or tenth aspect, the first characteristic is either the magnitude of input power that can be input to the lamps (2; 2a; 2b; 2c) or whether or not the lamps (2; 2a; 2b; 2c) have a dimming function. The third characteristic is the remaining one of the magnitude of input power and whether or not the lamps (2; 2a; 2b; 2c) have a dimming function.

[0157] According to the lamp unit (1; 1a; 1b; 1c) of the eleventh aspect, the possibility of incorrect installation can be reduced for characteristics that are significantly affected by the lamps (2; 2a; 2b; 2c) and sockets (3; 3a; 3b; 3c).

[0158] In a lamp unit (1; 1a; 1b; 1c) according to a twelfth aspect, in any one of the fifth to eleventh aspects, the second characteristic is the magnitude of an input voltage that can be input to the lamps (2; 2a; 2b; 2c).

[0159] According to the lamp unit (1; 1a; 1b; 1c) of the twelfth aspect, it is possible to reduce the occurrence of problems such as low input voltage to the lamps (2; 2a; 2b; 2c).

[0160] In a lamp unit (1; 1a; 1b; 1c) according to a thirteenth aspect, in any one of the first to twelfth aspects, the first characteristic is the magnitude of input power that can be input to the lamps (2; 2a; 2b; 2c), or whether or not the lamps (2; 2a; 2b; 2c) have a dimming function.

[0161] According to the lamp unit (1; 1a; 1b; 1c) of the thirteenth aspect, the possibility of incorrect installation can be reduced for characteristics that have a large impact on the lamps (2; 2a; 2b; 2c) and sockets (3; 3a; 3b; 3c).

[0162] A lighting fixture (9) according to a fourteenth aspect includes the lamp unit (1; 1a; 1b; 1c) according to any one of the first to thirteenth aspects and a fixture body (91). The fixture body (91) holds sockets (3; 3a; 3b; 3c).

[0163] According to the lighting fixture (9) of the fourteenth aspect, in the lamp unit (1; 1a; 1b; 1c), the possibility of incorrect installation of an incompatible lamp (2; 2a; 2b; 2c) into a socket (3; 3a; 3b; 3c) with respect to the first characteristic can be reduced.

[0164] A lamp (2; 2a; 2c) according to a fifteenth aspect is a lamp that can be attached to a socket (3; 3a; 3c). The lamp (2; 2a; 2c) includes a light source (4) and a lamp body (5; 5a; 5c). The light source (4) is disposed in the lamp body (5; 5a; 5c). The lamp body (5; 5a; 5c) has an identification protrusion (first identification protrusion 56). The identification protrusion has a size corresponding to the allowable range of a specified characteristic (first characteristic) of the lamp (2; 2a; 2c). The larger the allowable range of the specified characteristic, the smaller the identification protrusion.

[0165] According to the lamp (2; 2a; 2c) of the fifteenth aspect, when used in conjunction with a socket (3; 3a; 3c) having an identification recess (first identification recess 84) of a size that allows the insertion of an identification protrusion (first identification protrusion 56) of a type of lamp that the socket (3; 3a; 3c) accepts for the specified characteristics (first characteristics) among the multiple types of lamps, and which is large enough to prevent the insertion of the identification protrusion of a type of lamp that the socket (3; 3a; 3c) does not accept for the specified characteristics among the multiple types of lamps, the possibility of incorrectly installing a lamp (2; 2a; 2c) that is incompatible with the specified characteristics into the socket (3; 3a; 3c) can be reduced.

[0166] A lamp (2b) according to a sixteenth aspect is a lamp that can be attached to a socket (3b). The lamp (2b) includes a light source (4) and a lamp body (5b). The light source (4) is disposed in the lamp body (5b). The lamp body (5b) has an identification recess (first identification recess 56b). The size of the identification recess corresponds to the allowable range of a specified characteristic (first characteristic) of the lamp (2b). The larger the allowable range of the specified characteristic, the larger the identification recess.

[0167] According to the lamp (2b) of the sixteenth aspect, by using the lamp (2b) in conjunction with a socket (3b) having an identification protrusion (first identification protrusion 84b) of a size that allows the insertion of an identification recess (first identification recess 56b) of a type of lamp that the socket (3b) accepts for the specified characteristics (first characteristics) among the multiple types of lamps, and which is not large enough to allow the insertion of an identification recess of a type of lamp that the socket (3b) does not accept for the specified characteristics among the multiple types of lamps, the possibility of erroneously installing a lamp (2b) that does not comply with the specified characteristics into the socket (3b) can be reduced.

[0168] A socket (3; 3a; 3c) according to a seventeenth aspect is a socket into which a lamp (2; 2a; 2c) can be attached. The socket (3; 3a; 3c) includes a socket body (8; 8a; 8c). The socket body (8; 8a; 8c) has an identification recess (first identification recess 84). The identification recess is sized to allow the identification protrusion (first identification protrusion 56) of the lamp (2; 2a; 2c) to be inserted. The identification recess is sized to allow the insertion of the identification protrusion of a lamp of a type that is acceptable to the socket (3; 3a; 3c) for the specified characteristics of the lamp, among multiple types of lamps including the lamp (2; 2a; 2c), and is sized to prevent the insertion of the identification protrusion of a lamp of a type that is unacceptable to the socket (3; 3a; 3c) for the specified characteristics, among multiple types of lamps.

[0169] According to the socket (3; 3a; 3c) of the 17th aspect, the larger the tolerance range of the specified characteristic (first characteristic), the smaller the identification protrusion (first identification protrusion 56) that is used with the lamp (2; 2a; 2c), thereby reducing the possibility of incorrectly installing a lamp (2; 2a; 2c) that does not comply with the specified characteristic into the socket (3; 3a; 3c).

[0170] A socket (3b) according to an eighteenth aspect is a socket into which a lamp (2b) can be attached. The socket (3b) includes a socket body (8b). The socket body (8b) has an identification protrusion (first identification protrusion 84b). The identification protrusion is sized to be insertable into an identification recess (first identification recess 56b) of the lamp (2b). The identification protrusion is sized to be insertable into an identification recess of a lamp type that is acceptable to the socket (3b) for a specified characteristic (first characteristic) of the lamp among multiple types of lamps, including the lamp (2b), and is sized to be unable to be inserted into an identification recess of a lamp type that is not acceptable to the socket (3b) for the specified characteristic among multiple types of lamps.

[0171] According to the socket (3b) of the 18th aspect, the larger the tolerance range of the specified characteristic (first characteristic), the larger the identification recess (first identification recess 56b) that is used with the lamp (2b), thereby reducing the possibility of incorrectly attaching a lamp (2b) that does not comply with the specified characteristic to the socket (3b).

[0172] A tool body unit according to a nineteenth aspect includes the socket (3; 3a; 3b; 3c) according to the seventeenth or eighteenth aspect, and a tool body (91). The socket (3; 3a; 3b; 3c) is attached to the tool body (91).

[0173] According to the fixture main body unit of the 19th aspect, when used together with lamps (2; 2a; 2b; 2c), the possibility of incorrect installation of lamps (2; 2a; 2b; 2c) that do not meet the specified characteristics into sockets (3; 3a; 3b; 3c) can be reduced. [Explanation of symbols]

[0174] 1, 1a, 1b, 1c Lamp unit 2, 2a, 2b, 2c Lamps 3,3a,3b,3c sockets 4 light source 5, 5a, 5b, 5c Lamp body 56 First identification protrusion 56b First identification recess 57, 58, 59 Second identification recess 57c Second identification protrusion 7 Power supply pin 8, 8a, 8b, 8c Socket body 83 Power supply hole 84 First identification recess 84b First identification protrusion 85, 86, 87 Second identification protrusion 85c Second identification recess 9. Lighting fixtures 91 Equipment body θ1, θ2 position angle O1,O2 center

Claims

1. Lamp and a socket into which the lamp can be attached, The lamp is A light source and a lamp body in which the light source is disposed; a power supply pin provided on the lamp body for receiving power; The socket is A socket body is provided. The lamp body is a first identification protrusion located closer to the center than the power supply pin and corresponding to a first characteristic of the lamp; The socket body is a power supply hole into which the power supply pin can be inserted; a first identification recess located closer to the center than the power supply hole and into which the first identification protrusion can be inserted, The lamp body is a second identification recess located on the outer periphery side of the power supply pin and corresponding to a second characteristic of the lamp; The socket body is a second identification protrusion that is located on the outer periphery side of the power supply hole and that can be inserted into the second identification recess; Lamp unit.

2. Lamp and a socket into which the lamp can be attached, The lamp is A light source and a lamp body in which the light source is disposed; a power supply pin provided on the lamp body for receiving power; The socket is A socket body is provided. The lamp body is a first identification recess located closer to the center than the power supply pin and corresponding to a first characteristic of the lamp; The socket body is a power supply hole into which the power supply pin can be inserted; a first identification protrusion that is positioned closer to the center than the power supply hole and that can be inserted into the first identification recess, The lamp body is a second identification recess located on the outer periphery side of the power supply pin and corresponding to a second characteristic of the lamp; The socket body is a second identification protrusion that is located on the outer periphery side of the power supply hole and that can be inserted into the second identification recess; Lamp unit.

3. Lamp and a socket into which the lamp can be attached, The lamp is A light source and a lamp body in which the light source is disposed; a power supply pin provided on the lamp body for receiving power; The socket is A socket body is provided. The lamp body is a first identification protrusion located closer to the center than the power supply pin and corresponding to a first characteristic of the lamp; The socket body is a power supply hole into which the power supply pin can be inserted; a first identification recess located closer to the center than the power supply hole and into which the first identification protrusion can be inserted, The lamp body is a second distinguishing protrusion located on the outer periphery side of the power supply pin and corresponding to a second characteristic of the lamp; The socket body is a second identification recess, the second identification protrusion being insertable therein and located closer to the outer periphery than the power supply hole; Lamp unit.

4. The second identification recess is provided on the periphery of the lamp body.

3. The lamp unit according to claim 1.

5. The second identification protrusion is provided on the peripheral edge of the lamp body.

4. The lamp unit according to claim 3.

6. The first identification protrusion can be fitted into the first identification recess. The lamp unit according to any one of claims 1 to 5.

7. The second identification protrusion can be fitted into the second identification recess. The lamp unit according to any one of claims 1 to 6.

8. the first characteristic is either a magnitude of input power that can be input to the lamp or whether or not the lamp has a dimming function; The lamp unit according to any one of claims 1 to 7.

9. the second characteristic is the magnitude of an input voltage that can be input to the lamp; The lamp unit according to any one of claims 1 to 7.

10. The lamp is a plurality of power supply pins including the power supply pin; The lamp body is a mounting portion on which the plurality of power supply pins are provided, The socket body is a plurality of power feed holes including the power feed hole and corresponding to the plurality of power feed pins; the lamp and the socket are rotated relative to each other with the plurality of power feed pins inserted into the plurality of power feed holes, respectively, thereby attaching the lamp to the socket; the plurality of power supply pins are provided on the installation portion so as to be point symmetric with respect to a center of the installation portion; The lamp unit according to any one of claims 1 to 9.

11. A lamp unit according to any one of claims 1 to 10; An instrument body that holds the socket, Lighting fixtures.

12. A lamp that can be fitted into a socket, A light source and a lamp body in which the light source is disposed; a power supply pin provided on the lamp body for receiving power; The lamp body is an identification protrusion, which is positioned closer to the center than the power supply pin and corresponds to a first characteristic of the lamp, and which is insertable into an identification recess of the socket; an identification recess located on the outer periphery side of the power supply pin, corresponding to a second characteristic of the lamp, into which an identification protrusion of the socket can be inserted; lamp.

13. A lamp that can be fitted into a socket, A light source and a lamp body in which the light source is disposed; a power supply pin provided on the lamp body for receiving power; The lamp body is a first identification recess located closer to the center than the power supply pin and corresponding to a first characteristic of the lamp, into which a first identification protrusion of the socket can be inserted; a second identification recess located on the outer periphery side of the power supply pin, corresponding to a second characteristic of the lamp, into which a second identification protrusion of the socket can be inserted; lamp.

14. A lamp that can be fitted into a socket, A light source and a lamp body in which the light source is disposed; a power supply pin provided on the lamp body for receiving power; The lamp body is a first identification protrusion located closer to the center than the power supply pin, corresponding to a first characteristic of the lamp, and insertable into a first identification recess of the socket; a second identification protrusion located on the outer circumferential edge side of the power supply pin, corresponding to a second characteristic of the lamp, and insertable into a second identification recess of the socket; lamp.

15. A socket into which a lamp having a power supply pin for receiving power can be attached, A socket body is provided. The socket body is a power supply hole into which the power supply pin of the lamp can be inserted; an identification recess located closer to the center than the power supply hole and into which an identification protrusion of a lamp of a type that is acceptable to the socket for a first characteristic of the lamp among a plurality of types of lamps including the lamp can be inserted; an identification protrusion located on the outer periphery side of the power supply hole and insertable into an identification recess of a lamp of a type that is acceptable to the socket for the second characteristic of the lamp among the plurality of types of lamps; socket.

16. A socket into which a lamp having a power supply pin for receiving power can be attached, A socket body is provided. The socket body is a power supply hole into which the power supply pin of the lamp can be inserted; a first identification protrusion located closer to the center than the power supply hole and insertable into a first identification recess of a lamp of a type that is acceptable for the socket with respect to a first characteristic of the lamp among a plurality of types of lamps including the lamp; a second identification protrusion located on the outer periphery side of the power supply hole and capable of being inserted into a second identification recess of a lamp of a type that is acceptable to the socket for the second characteristic of the lamp among the plurality of types of lamps; socket.

17. A socket into which a lamp having a power supply pin for receiving power can be attached, A socket body is provided. The socket body is a power supply hole into which the power supply pin of the lamp can be inserted; a first identification recess located closer to the center than the power supply hole and into which a first identification protrusion of a lamp of a type that is acceptable to the socket for a first characteristic of the lamp among a plurality of types of lamps including the lamp can be inserted; a second identification recess located on the outer periphery side of the power supply hole, into which a second identification protrusion of a lamp of a type that is acceptable to the socket for the second characteristic of the lamp among the plurality of types of lamps can be inserted; socket.

18. A socket according to any one of claims 15 to 17; and a fixture body to which the socket is attached. Fixture body unit.

Images