Lamp unit, lighting fixture, lamp, socket, and appliance body unit

Abstract

To reduce the probability of an incompatible lamp being mistakenly fitted to a socket.SOLUTION: A lamp unit 1 is provided with a lamp 2 and a socket 3. The lamp 2 can be fitted to the socket 3. A lamp body 5 has an identification concave portion. The identification concave portion is positioned outside feeding pins 7, and has a size corresponding to an acceptable range of a characteristic of the lamp 2. A socket main body 8 has feeding holes 83 and an identification convex portion. The identification convex portion is positioned outside the feeding holes 83, and has a size allowing insertion into the identification concave portion. The larger the acceptable range of the characteristic of the lamp 2 is, the larger the size of the identification concave portion is. The size of the identification convex portion allows insertion into an identification concave portion of a lamp of a type for which the socket 3 is acceptable with regard to the characteristic among lamps of multiple types including the lamp 2; and disallows insertion of an identification concave portion of a lamp of a type for which the socket 3 is unacceptable with regard to the characteristic among the lamps of multiple types.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure generally relates to a lamp unit, a lighting fixture, a lamp, a socket, and an appliance body unit. More specifically, the present disclosure relates to a lamp unit including a lamp and a socket, a lighting fixture including the lamp unit, a lamp used with the socket, a socket used with the lamp, and an appliance body unit including the socket.

Background Art

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

[0003] The appliance body includes a socket portion having a positive-side power supply terminal and a negative-side power supply terminal. The appliance body is configured such that a straight-tube light-emitting element lamp is mounted on the socket portion (socket).

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

[0005] The lighting fixture described in Patent Document 1 further includes misconnection prevention means for preventing the positive-side power receiving terminal and the negative-side power receiving terminal of the light-emitting element lamp from being connected to the power supply terminals on the different-pole sides in the socket portion. The misconnection prevention means regulates the direction in which the positive-side power receiving terminal and the negative-side power receiving terminal are inserted into the insertion groove to be in one direction.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In the lighting fixture described in Patent Document 1, although the lamp can be attached to the socket without misidentifying the polarity of the power supply pin, there is a problem that an incompatible lamp cannot be prevented from being erroneously attached to the socket.

[0008] The present disclosure is an invention made in view of the above points, and an object of the present disclosure is to provide a lamp unit, a lighting fixture, a lamp, a socket, and an appliance body unit that can reduce the possibility of an incompatible lamp being erroneously attached to the socket.

Means for Solving the Problems

[0009] A lamp unit according to an aspect of the present disclosure includes a lamp and a socket. The socket is capable of attaching the lamp. The lamp includes a light source, a lamp body, and a power supply pin. The light source is disposed in the lamp body. The power supply pin is provided on the lamp body and is a pin for receiving power supply. The socket includes a socket body. The lamp body has an identification recess. The identification recess is located outside the power supply pin and has a size corresponding to an allowable range of characteristics in the lamp. The socket body has a power supply hole and an identification protrusion. The power supply hole is a hole into which the power supply pin can be inserted. The identification protrusion is located outside the power supply hole and has a size that can be inserted into the identification recess. The larger the allowable range of the characteristics in the lamp, the larger the identification recess. The identification protrusion has a size that can be inserted into the identification recess of a lamp of a type that the socket allows with respect to the characteristics among a plurality of types of lamps including the lamp, and has a size that cannot be inserted into the identification recess of a lamp of a type that the socket does not allow with respect to the characteristics among the plurality of types of lamps.

[0010] A lamp unit according to one aspect of the present disclosure includes a lamp and a socket. The socket is capable of mounting the lamp. The lamp includes a light source, a lamp body, and a power supply pin. The light source is disposed in the lamp body. The power supply pin is provided on the lamp body and is a pin for receiving power supply. The socket includes a socket body. The lamp body has an identification protrusion. The identification protrusion is located outside the power supply pin and has a size corresponding to an allowable range of characteristics of the lamp. The socket body has a power supply hole and an identification recess. The power supply hole is a hole into which the power supply pin can be inserted. The identification recess is located outside the power supply hole and has a size into which the identification protrusion can be inserted. The larger the allowable range of the characteristics of the lamp, the smaller the identification protrusion. The identification recess has a size into which the identification protrusion of a lamp of a type that the socket allows with respect to the characteristics among a plurality of types of lamps including the lamp can be inserted, and has a size into which the identification protrusion of a lamp of a type that the socket does not allow with respect to the characteristics among the plurality of types of lamps cannot be inserted.

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

[0012] A lamp according to one aspect of the present disclosure is a lamp that can be mounted on a socket. The lamp includes a light source, a lamp body, and a power supply pin. The light source is disposed in the lamp body. The power supply pin is provided on the lamp body and is a pin for receiving power supply. The lamp body has an identification protrusion. The identification protrusion is located outside the power supply pin and has a size corresponding to an allowable range of specified characteristics of the lamp. The larger the allowable range of the specified characteristics of the lamp, the smaller the identification protrusion.

[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 supply pin. The light source is disposed in the lamp body. The power supply pin is provided on the lamp body and is a pin for receiving power supply. The lamp body has an identification recess. The identification recess is located outside the power supply pin and has a size corresponding to an allowable range of specified characteristics of the lamp. The larger the allowable range of the specified characteristics of the lamp, the larger the identification recess.

[0014] A socket according to one aspect of the present disclosure is a socket to which a lamp can be attached. The lamp has a power supply pin. The power supply pin is a pin for receiving power supply. The socket includes a socket body. The socket body has a power supply hole and an identification recess. The power supply hole is a hole into which the power supply pin of the lamp can be inserted. The identification recess is located outside the power supply hole and has a size into which an identification projection of the lamp can be inserted. The identification recess has a size into which the identification projection of a type of lamp that the socket allows with respect to the specified characteristics of the lamp among a plurality of types of lamps including the lamp can be inserted, and has a size into which the identification projection of a type of lamp that the socket does not allow with respect to the specified characteristics among the plurality of types of lamps cannot be inserted.

[0015] A socket according to one aspect of the present disclosure is a socket to which a lamp can be attached. The lamp has a power supply pin. The power supply pin is a pin for receiving power supply. The socket includes a socket body. The socket body has a power supply hole and an identification projection. The power supply hole is a hole into which the power supply pin of the lamp can be inserted. The identification projection is a projection located outside the power supply hole and can be inserted into the identification recess of the lamp. The identification projection has a size that can be inserted into the identification recess of a type of lamp that the socket allows with respect to the specified characteristics among a plurality of types of lamps including the lamp, and has a size that cannot be inserted into the identification recess of a type of lamp that the socket does not allow with respect to the specified characteristics among the plurality of types of lamps.

[0016] The appliance body unit according to one aspect of the present disclosure includes the socket and the appliance body. The socket is attached to the appliance body.

Advantages of the Invention

[0017] According to the lamp unit, lighting fixture, lamp, socket, and appliance body unit according to the above aspect of the present disclosure, the possibility of an incompatible lamp being erroneously attached to the socket can be reduced.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Modes for Carrying Out the Invention

[0019] Hereinafter, the lamp unit according to Embodiments 1 and 2 and the lighting fixture according to Embodiment 3 will be described with reference to the drawings. Each of FIGS. 1 to 15 referred to in the following embodiments and the like is a schematic diagram, and the ratio of the size and thickness of each component in the drawing does not necessarily reflect the actual dimensional ratio.

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

[0021] As shown in FIG. 1, the lamp unit 1 according to Embodiment 1 includes a lamp 2 and a socket 3. The lamp unit 1 is used, for example, in 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 Embodiment 1 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 the socket 3, and includes a light source 4, a lamp body 5, a cover 6, and a plurality (two in the illustrated example) of power supply pins 7.

[0024] (2.1.1) Light source The light source 4 shown in FIG. 1 has, for example, one or a plurality of LEDs (Light Emitting Diodes). When the light source 4 has a plurality of LEDs, in the light source 4, the plurality of LEDs are arranged on a plane. The light source 4 is configured such that light from each LED is emitted from the emission 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 houses the light source 4. The light source 4 is disposed in the lamp body 5. The lamp body 5 is formed 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 installation portion 54. In Embodiment 1, the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation portion 54 are integrally formed. That is, the lamp body 5 is constituted by one member. Note that the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation portion 54 are not limited to being integrally formed, and may be separately formed. Alternatively, at least two of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation portion 54 may be separately formed. That is, the lamp body 5 may be constituted by a plurality of members. Further, each of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation portion 54 may be constituted by one member or may be constituted by a plurality of members.

[0027] The annular portion 52 has an annular shape. In the example of FIG. 2, the annular portion 52 has an 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.

[0028] The second side surface portion 53 is provided so as to protrude in the first direction D1 from the inner peripheral end 522 of the annular portion 52. Since the first side surface portion 51 is provided at the outer peripheral end 521 of the annular portion 52 and the second side surface portion 53 is provided at the inner peripheral end 522 of the annular portion 52, in a plan view from the first direction D1, the second side surface portion 53 is smaller than the first side surface portion 51. 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] As shown in FIG. 2, the first installation part 54 has a circular shape in a plan view from the first direction D1. The first installation part 54 has an outer peripheral end 541 that forms the outer periphery of the first installation part 54. The first installation part 54 is provided at one end of the second side surface part 53. The outer peripheral end 541 of the first installation part 54 and one end of the second side surface part 53 are connected. The first installation part 54 has a plurality (two in the illustrated example) of through holes 55 for the power supply pins 7 to penetrate.

[0030] (2.1.3) Cover The cover 6 shown in FIGS. 1 and 4 has translucency (including transparency) and transmits the 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 part 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 formed of a synthetic resin such as, for example, acrylic resin, polycarbonate resin, or silicone resin. Note that the cover 6 may be formed of a material other than synthetic resin. The cover 6 may be formed of, for example, glass. Further, the cover 6 may have light diffusing properties. Furthermore, the cover 6 may be transparent or milky white.

[0032] (2.1.4) Power supply pin As shown in FIGS. 1 to 4, the plurality of power supply pins 7 are pins for receiving power supply and are provided on the lamp body 5. More specifically, the plurality of power supply pins 7 are provided to protrude from the first installation part 54 of the lamp body 5. The plurality of power supply pins 7 are provided at positions point-symmetrical with respect to the center O1 of the first installation part 54 in the first installation part 54.

[0033] Each power supply pin 7 is formed 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. Note that the shaft portion 71 and the tip portion 72 may 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 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 As shown in FIGS. 5 to 7, the socket body 8 has a bottomed cylindrical shape. The socket body 8 is formed of, for example, resin.

[0036] The socket body 8 has a side surface portion 81 and a second installation portion 82. In Embodiment 1, the side surface portion 81 and the second installation portion 82 are integrally formed. That is, the socket body 8 is constituted by one 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 constituted by a plurality of members. Further, each of the side surface portion 81 and the second installation portion 82 may be constituted by one member or a plurality of members.

[0037] As shown in FIGS. 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 peripheral end 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 peripheral end 821 of the second installation portion 82 and the other end of the side surface portion 81 are connected.

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

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

[0040] (2.3) Attachment of the lamp to the socket The lamp 2 is attached to the socket 3 by relatively rotating the lamp 2 and the socket 3 with the plurality of power supply pins 7 inserted into the plurality of power supply holes 83 respectively.

[0041] (2.4) Attachment to the appliance body Socket 3 is attached to the instrument body 91 (see FIG. 15), for example, at one end of the side surface portion 81 of the socket body 8. In a state where the socket 3 is attached to the instrument body 91, the power supply pin 7 of the lamp 2 is inserted into the round hole 831 of the power supply hole 83 of the socket 3. Then, when the lamp 2 including the power supply pin 7 is rotated, the power supply pin 7 moves from the round hole 831 to the long hole 832, and finally, the power supply pin 7 is positioned at the other end of the power supply hole 83. Thereby, the lamp 2 is attached to the socket 3. At this time, the power supply pin 7 contacts the contact of the socket 3 and conducts electricity.

[0042] (3) Details of the first installation part and the second installation part Next, the details of the first installation part 54 of the lamp 2 and the second installation part 82 of the socket 3 will be described.

[0043] As shown in FIGS. 2 to 4, the first installation part 54 of the lamp 2 has a first identification convex part 56. The first identification convex part 56 is formed in the central region of the first installation part 54. The central region of the first installation part 54 is a region including the center O1 of the first installation part 54. More specifically, the central region of the first installation part 54 is a region located closer to the center than the plurality of power supply pins 7 on the straight line connecting two points on the outer peripheral end 541 passing through the center O1 of the first installation part 54.

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

[0045] In Embodiment 1, the height H1 of the first identification convex portion 56 varies depending on the allowable range of the first characteristic in the lamp 2. More specifically, the height H1 of the first identification convex portion 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 convex portion 56 is 7.5 mm. When the input power of the lamp 2 is P2 (P2 > P1), the height H1 of the first identification convex portion 56 is 10 mm. When the input power of the lamp 2 is P3 (P3 > P2), the height H1 of the first identification convex portion 56 is 12.5 mm. When the input power of the lamp 2 is P4 (P4 > P3), the height H1 of the first identification convex portion 56 is 15 mm.

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

[0047] Note that the height H1 of the first identification convex portion 56 of the lamp 2 is not limited to the above numerical values. As long as the relationship is such that the height H1 of the first identification convex portion 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 concave portion 84. The first identification concave portion 84 is formed in the central region of the second installation portion 82. The central region of the second installation portion 82 is a region including the center O2 of the second installation portion 82. More specifically, the central region of the second installation portion 82 is a region located closer to the center side than a plurality of power supply holes 83 on a straight line connecting two points on the outer peripheral end 821 passing through the center O2 of the second installation portion 82.

[0049] The first identification recess 84 has a size into which the first identification protrusion 56 can be inserted. More specifically, the first identification recess 84 has a size into which the first identification protrusion 56 of the type of lamp 2 that the socket 3 permits with respect to the first characteristic among a plurality of types of lamps 2 including the lamp 2 can be inserted. Further, the first identification recess 84 has a size into which the first identification protrusion 56 of the type of lamp 2 that the socket 3 does not permit with respect to the first characteristic among the plurality of types of lamps 2 cannot be inserted.

[0050] In Embodiment 1, the depth L1 of the first identification recess 84 varies depending on the first characteristic that the socket 3 permits with respect to the first characteristic of the lamp 2. 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 permits. 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. Also, 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] Note that when the first identification protrusion 56 of the lamp 2 is inserted into the first identification recess 84 of the socket 3, it is preferable that there is a gap between the first identification recess 84 and the first identification protrusion 56. The above gap is, for example, about 0.5 mm. From the above, it is preferable that the depth L1 of the first identification recess 84 is, for example, about 0.5 mm larger than the height H1 of the first identification protrusion 56. 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, and when the input power of the lamp 2 is P2, the depth L1 of the first identification recess 84 is 10.5 mm. Also, when the input power of the lamp 2 is P3, the depth L1 of the first identification recess 84 is 13 mm, and when the input power of the lamp 2 is P4, the depth L1 of the first identification recess 84 is 15.5 mm. Note that the gap between the first identification recess 84 and the first identification protrusion 56 is not limited to 0.5 mm and is a value that can be appropriately selected.

[0052] Note that the depth L1 of the first identification recess 84 of the socket 3 is not limited to the above numerical values. As long as the relationship is such that the greater the input power of the lamp 2 allowed by the socket 3, the deeper the depth L1 of the first identification recess 84.

[0053] As described above, when the socket 3 is of the input power P1 type, the lamp 2 with the input power P1 can be attached to the socket 3, but the lamp 2 with the input power P2 cannot be attached to the socket 3. On the other hand, when the socket 3 is of the input power P4 type, the lamp 2 with the input power P4 can be attached to the socket 3. Also, the lamp 2 with the input power P3 can be attached to the socket 3. Furthermore, the lamps 2 with the input powers P1 and P2 can also be attached to the socket 3.

[0054] As shown in FIG. 2, the first installation portion 54 of the lamp 2 has a plurality (two in the illustrated example) of second identification recesses 57. The plurality of second identification recesses 57 are formed in the outer peripheral region of the first installation portion 54. The outer peripheral region of the first installation portion 54 is, for example, a region located on the outer peripheral side of the plurality of power supply pins 7 on a straight line connecting two points of the outer peripheral end 541 passing through the center O1 of the first installation portion 54. In the example of FIG. 2, each second identification recess 57 is provided at the peripheral edge of the lamp body 5.

[0055] Each second identification recess 57 corresponds to the second characteristic of the lamp 2. The positions of the plurality of second identification recesses 57 are different depending on the second characteristic of the lamp 2. More specifically, the positions of the plurality of second identification recesses 57 are different according to the magnitude of the input voltage that can be input to the lamp 2.

[0056] In Embodiment 1, according to the magnitude of the input voltage of the lamp 2, the position angle θ1 representing the position of the second identification recess 57 with respect to the reference position is different. The reference position is, for example, a straight line connecting the center O1 of the first installation portion 54 and the power supply pin 7. That is, the relative positions of the second identification recess 57 and the power supply pin 7 in the lamp 2 are different according to the second characteristic. For example, when the input voltage of the lamp 2 is 100V, the position angle θ1 of the second identification recess 57 is 0°, and when the input voltage of the lamp 2 is 200V, the position angle θ1 of the second identification recess 57 is 45°. When the input voltage of the lamp 2 is a foreign voltage, the position angle θ1 of the second identification recess 57 is 90°, and when the input voltage of the lamp 2 is other voltages, the position angle θ1 of the second identification recess 57 is 135°.

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

[0058] Each second identification protrusion 85 corresponds to the second characteristic that the socket 3 allows for the second characteristic of the lamp 2. The positions of the respective second identification protrusions 85 are different according to the second characteristic that the socket 3 allows for the second characteristic of the lamp 2. More specifically, the positions of the respective second identification protrusions 85 are different according to the magnitude of the input voltage input to the lamp 2.

[0059] In Embodiment 1, according to the magnitude of the input voltage of the lamp 2, the position angle θ2 representing the position of the second identification convex portion 85 with respect to the reference position is different. 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 supply hole 83. That is, the relative positions of the second identification convex portion 85 and the power supply hole 83 in the socket 3 are different depending on the type of the lamp 2 that the socket 3 allows for the second characteristic among a plurality of types of lamps 2. For example, when the input voltage of the lamp 2 is 100V, the position angle θ2 of the second identification convex portion 85 is 0°, and when the input voltage of the lamp 2 is 200V, the position angle θ2 of the second identification convex portion 85 is 45°. When the input voltage of the lamp 2 is for overseas use, the position angle θ2 of the second identification convex portion 85 is 90°, and when the input voltage of the lamp 2 is otherwise, the position angle θ2 of the second identification convex portion 85 is 135°.

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

[0061] In addition, when the lamp 2 allows both an input voltage of 100V and an input voltage of 200V, it is provided at both a position where the position angle θ1 of the second identification concave portion 57 is 0° and a position where it is 45°. Similarly, when the lamp 2 allows both an input voltage of 200V and an overseas voltage, it is provided at both a position where the position angle θ1 of the second identification concave portion 57 is 45° and a position where it is 90°. In short, the lamp 2 has the second identification concave portion 57 so as to correspond to the allowable input voltage.

[0062] Also, the size of the second identification concave portion 57 of the lamp 2 is different depending on the third characteristic of the lamp 2. The second identification concave portion 57 is larger as the allowable range of the third characteristic in the lamp 2 is larger.

[0063] In Embodiment 1, the size of the second identification recess 57 varies according to whether the lamp 2 supports dimming. More specifically, the radial width W1 of the first installation portion 54 in the second identification recess 57 varies according to whether the lamp 2 supports dimming. For example, when the lamp 2 has a dimming function, the width W1 of the second identification recess 57 is 3 mm. When 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 according to the third characteristic that the socket 3 allows for the lamp 2. The second identification protrusion 85 is sized to be insertable into the second identification recess 57 of the type of lamp 2 for which the socket 3 allows the third characteristic among a plurality of types of lamps 2. The second identification protrusion 85 is sized such that it cannot be inserted into the second identification recess 57 of the type of lamp 2 for which the socket 3 does not allow the third characteristic among a plurality of types of lamps 2.

[0065] In Embodiment 1, it varies according to whether the socket 3 supports dimming. More specifically, the radial width W2 of the second installation portion 82 in the second identification protrusion 85 varies according to whether the socket 3 supports dimming. For example, when the socket 3 has a dimming function, the width W2 of the second identification protrusion 85 is 3 mm. When the socket 3 does not have a dimming function, the width W2 of the second identification protrusion 85 is 1.5 mm.

[0066] It should be noted that when the second identification protrusion 85 of the socket 3 is inserted into the second identification recess 57 of the lamp 2, it is preferable that there is a gap between the second identification recess 57 and the second identification protrusion 85. The above gap is, for example, about 0.5 mm. From the above, it is preferable that the width W1 of the second identification recess 57 is, for example, about 0.5 mm larger than the width W2 of the second identification protrusion 85. In this case, when the lamp 2 supports dimming, the width W1 of the second identification recess 57 is 3.5 mm, and when the lamp 2 does not support dimming, the width W1 of the second identification recess 57 is 2 mm. Note 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 a value selected as appropriate.

[0067] As described above, when the socket 3 does not have a dimming function, either a lamp 2 without a dimming function or a lamp 2 with a dimming function can be attached to this socket 3. On the other hand, when the socket 3 has a dimming function, a lamp 2 with a dimming function can be attached to this socket 3, but a lamp 2 without a dimming function cannot be attached.

[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 Embodiment 1, the first identification convex portion 56 of the lamp 2 is smaller as the allowable range of the first characteristic is larger. Further, the first identification concave portion 84 of the socket 3 has a size into which the first identification convex portion 56 of the type of lamp 2 that the socket 3 allows with respect to the first characteristic among a plurality of types of lamps 2 can be inserted, and the first identification convex portion 56 of the type of lamp that the socket 3 does not allow with respect to the first characteristic among a plurality of types of lamps 2 has a size that cannot be inserted. Thereby, with respect to the first characteristic, the possibility of misattachment of an incompatible lamp 2 to the socket 3 can be reduced.

[0070] In the lamp unit 1 according to Embodiment 1, the first identification convex portion 56 is provided in a region on the center O1 side of the plurality of power supply pins 7 and including the center O1. Thereby, since the first identification convex portion 56 is provided at a position that does not interfere with the rotation of the power supply pins 7 and the lamp 2, the rotation of the lamp 2 is not interfered with, and no new space for the first identification convex portion 56 is required.

[0071] In the lamp unit 1 according to Embodiment 1, the relative position (position angle θ1) between the second identification recess 57 and the power supply pin 7 in the lamp 2 differs depending on the second characteristic of the lamp 2. Further, the relative position (position angle θ2) between the second identification protrusion 85 and the power supply hole 83 in the socket 3 differs depending on the type of the lamp 2 that the socket 3 allows with respect to the second characteristic among a plurality of types of lamps 2. Thereby, it is possible to reduce the possibility of erroneously mounting an incompatible lamp 2 on the socket 3 not only for the first characteristic but also for the second characteristic.

[0072] In the lamp unit 1 according to Embodiment 1, the second identification recess 57 is provided at the peripheral edge (outer peripheral end 541) of the lamp body 5. Thereby, the second identification recess 57 can be provided at a position that does not interfere with the arrangement of the power supply pin 7.

[0073] In the lamp unit 1 according to Embodiment 1, the second characteristic of the lamp 2 is the magnitude of the input voltage that can be input to the lamp 2. Thereby, it is possible to reduce the occurrence of a problem that the input voltage of the lamp 2 is low.

[0074] In the lamp unit 1 according to Embodiment 1, the second identification recess 57 of the lamp 2 is larger as the allowable range of the third characteristic in the lamp 2 is larger. Further, the second identification protrusion 85 of the socket 3 is sized to be insertable into the second identification recess 57 of the type of lamp 2 that the socket 3 allows with respect to the third characteristic among a plurality of types of lamps 2, and is sized not to be insertable into the second identification recess 57 of the type of lamp 2 that the socket 3 does not allow with respect to the third characteristic among a plurality of types of lamps 2. Thereby, it is possible to reduce the possibility of erroneously mounting an incompatible lamp 2 on the socket 3 not only for the first characteristic and the second characteristic but also for the third characteristic.

[0075] In the lamp unit 1 according to Embodiment 1, the first characteristic is the magnitude of the input power that can be input to the lamp 2, and the third characteristic is whether or not the lamp 2 has a dimming function. Thereby, it is possible to reduce the possibility of erroneous mounting for characteristics that have a great influence on the lamp 2 and the socket 3.

[0076] In the lamp unit 1 according to Embodiment 1, the first characteristic is the magnitude of the input power that can be input to the lamp 2. Thereby, for the characteristics that have a great influence on the lamp 2 and the socket 3, the possibility of incorrect mounting can be reduced.

[0077] (5) Modification Hereinafter, a modification of Embodiment 1 will be described.

[0078] (5.1) Modification 1 As a modification 1 of Embodiment 1, 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 convex portion 56. The socket body 8b of the socket 3b has a first identification convex portion 84b instead of the first identification recess 84. In Embodiment 1, the lamp body 5 has the first identification convex portion 56 and the socket body 8 has the first identification recess 84, whereas in Modification 1, the lamp body 5b has the first identification recess 56b and the socket body 8b has the first identification convex portion 84b.

[0079] In Modification 1, the first identification recess 56b of the lamp body 5b has a size corresponding to the allowable range of the first characteristic in the lamp 2b. The first identification recess 56b of the lamp body 5b is larger as the allowable range of the first characteristic is larger.

[0080] Specifically, the depth L3 of the first identification recess 56b varies depending on the allowable range of the first characteristic in 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 convex portion 84b of the socket body 8b has a size that can be inserted into the first identification recess 56b of the type of lamp 2b that the socket 3b allows with respect to the first characteristic among a plurality of types of lamps 2b including the lamp 2b, and is a size that cannot be inserted into the first identification recess 56b of the type of lamp 2b that the socket 3b does not allow with respect to the first characteristic among the plurality of types of lamps 2b.

[0082] Specifically, the height H1 of the first identification convex portion 84b varies depending on the first characteristic allowed by the socket 3b for the first characteristic of the lamp 2b. More specifically, the height H3 of the first identification convex portion 84b varies depending on the input power of the lamp 2b allowed by the socket 3b.

[0083] (5.2) Modification Example 2 As a modification example 2 of the first embodiment, the 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 convex portion 57c instead of the second identification concave portion 57. The socket body 8c of the socket 3c has a second identification concave portion 85c instead of the second identification convex portion 85. In the first embodiment, the lamp body 5b has the second identification concave portion 57 and the socket body 8 has the second identification convex portion 85, while in the modification example 2, the lamp body 5c has the second identification convex portion 57c and the socket body 8c has the second identification concave portion 85c.

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

[0085] Each second identification concave portion 85c of the socket 3c corresponds to the second characteristic allowed by the socket 3c for the second characteristic of the lamp 2c. The position of each second identification concave portion 85c varies depending on the second characteristic allowed by the socket 3c for the second characteristic of the lamp 2c. More specifically, the position of each second identification concave portion 85c varies depending on the magnitude of the input voltage input to the lamp 2c.

[0086] In the modification example 2, the second identification convex portion 57c of the lamp body 5c has a size corresponding to the allowable range of the third characteristic in the lamp 2c. The second identification convex portion 57c of the lamp body 5c is smaller as the allowable range of the third characteristic is larger.

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

[0088] On the other hand, the second identification concave portion 85c of the socket body 8c has a size that allows it to be inserted into the second identification convex portion 57c of the lamp 2c of the type that the socket 3c allows with respect to the third characteristic among a plurality of types of lamps 2c including the lamp 2c, and has a size that does not allow it to be inserted into the second identification convex portion 57c of the lamp 2c of the type that the socket 3c does not allow with respect to the third characteristic among a plurality of types of lamps 2c.

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

[0090] (5.3) Modification Example 3 As a modification example 3 of the first embodiment, in the lamp unit 1, the first characteristic may be a characteristic of whether the lamp 2 has a dimming function, and the third characteristic may be the magnitude of the input power. Also in the lamp unit 1 according to the modification example 3, it is possible to reduce the possibility of misinstallation for the characteristics that have a great influence on the lamp 2 and the socket 3.

[0091] (5.4) Modification Example 4 As a modification example 4 of the first embodiment, in accordance with the first characteristic (input power), the areas of both the first identification convex portion 56 and the first identification concave portion 84 in a plan view from the first direction D1 may be changed. In the modification example 4, instead of the height H1 of the first identification convex portion 56 and the depth L1 of the first identification concave portion 84, the areas of both the first identification convex portion 56 and the first identification concave portion 84 in a plan view from the first direction D1 are changed in accordance with the first characteristic.

[0092] Further, when the first identification convex portion 56 and the first identification concave portion 84 are circular, the diameters of both the first identification convex portion 56 and the first identification concave portion 84 in a plan view from the first direction D1 may be changed according to the first characteristic of the lamp 2 (the input power of the lamp 2).

[0093] In short, the size of the first identification convex portion 56 of the lamp 2 is the height H1 of the first identification convex portion 56, the area of the first identification convex portion 56 in a plan view from the first direction D1, and the diameter of the first identification convex portion 56 when the first identification convex portion 56 is circular. The size of the first identification concave portion 84 of the socket 3 is the depth L1 of the first identification concave portion 84, the area of the first identification concave portion 84 in a plan view from the first direction D1, and the diameter of the first identification concave portion 84 when the first identification concave portion 84 is circular.

[0094] (5.5) Other modifications As another modification of Embodiment 1, the light source 4 is not limited to an LED and may be other light emitting elements. For example, the light source 4 may be an organic EL (Electro Luminescence).

[0095] Also in the lamp unit 1 according to each of the above modifications, the same effects as those of the lamp unit 1 according to Embodiment 1 are achieved.

[0096] (Embodiment 2) The lamp unit 1a according to Embodiment 2 is different from the lamp unit 1 (see FIG. 1) according to Embodiment 1 in that it has a plurality of types (two types in the illustrated example) of second identification concave portions 58 and 59 and a plurality of types of second identification convex portions 86 and 87 (two types in the illustrated example), as shown in FIGS. 10 to 12.

[0097] (1) Lamp unit The lamp unit 1a according to Embodiment 2 includes a lamp 2a and a socket 3a, as shown in FIG. 10. Similar to the lamp unit 1 according to Embodiment 1, the lamp unit 1a is used, for example, in a lighting fixture 9 (see FIG. 15). Regarding the lamp unit 1 according to Embodiment 2, the same components as those of the lamp unit 1 according to Embodiment 1 are denoted by the same reference numerals and the description thereof is omitted.

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

[0099] (2.1) Lamp Instead of the lamp body 5 (see FIG. 1) of Embodiment 1, the lamp 2a has a lamp body 5a as shown in FIGS. 10 and 11. Also, similar to the lamp 2 (see FIG. 1) of Embodiment 1, the lamp 2a has a light source 4, a cover 6, and a plurality (two in the illustrated example) of power supply pins 7. Regarding the lamp 2a of Embodiment 2, descriptions of the same configurations and functions as those of the lamp 2 (see FIG. 1) of Embodiment 1 will be omitted.

[0100] (2.1.1) Lamp body Similar to the lamp body 5 of Embodiment 1, the lamp body 5a houses the light source 4 as shown in FIGS. 10 and 11. The lamp body 5a is formed 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 installation portion 54a. In Embodiment 2, the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation portion 54a are integrally formed. That is, the lamp body 5a is composed of one member. Note that the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation 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 installation portion 54a may be formed separately. That is, the lamp body 5a may be composed of a plurality of members. Also, each of the first side surface portion 51, the annular portion 52, the second side surface portion 53, and the first installation portion 54a may be composed of one member or a plurality of members.

[0102] The first installation part 54a has a plate shape as shown in FIG. 11, similar to the first installation part 54 (refer to FIG. 2) in the first embodiment. In the example of FIG. 11, the first installation part 54a has a disc shape. The first installation part 54a has an outer peripheral end 541 that forms the outer periphery of the first installation part 54a. The first installation part 54a is provided at one end of the second side surface part 53. The outer peripheral end 541 of the first installation part 54a is connected to one end of the second side surface part 53. Similar to the first installation part 54 in the first embodiment, the first installation part 54a has a plurality (two in the illustrated example) of through holes 55 for the power supply pin 7 to penetrate.

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

[0104] (2.2.1) Socket body Similar to the socket body 8 (refer to FIG. 1) in the first embodiment, the socket body 8a has a bottomed cylindrical shape as shown in FIGS. 12 to 14. The socket body 8a is formed of, for example, resin.

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

[0106] As shown in FIGS. 12 to 14, the second installation portion 82a has a plate shape. In the example of FIG. 12, the second installation portion 82a has a disc shape. The second installation portion 82a has an outer peripheral end 821 that forms the outer periphery of the second installation portion 82a. The second installation portion 82a is provided at the other end of the side surface portion 81. The outer peripheral end 821 of the second installation portion 82a is connected to the other end of the side surface portion 81. Similar to the second installation portion 82 of Embodiment 1, the second installation portion 82a has a plurality (two in the illustrated example) of power supply holes 83 into which the power supply pins 7 of the lamp 2a are inserted.

[0107] The socket 3a is attached to the instrument main body 91 (see FIG. 15) at one end of the side surface portion 81 of the socket main body 8a, for example. In a state where the socket 3a is attached to the instrument main body 91, the power supply pin 7 of the lamp 2a is inserted into the round hole 831 of the power supply hole 83 of the socket 3a. Then, when the lamp 2a including the power supply pin 7 is rotated, the power supply pin 7 moves from the round hole 831 to the long hole 832, and finally, the power supply pin 7 is located at the other end of the power supply hole 83. Thereby, the lamp 2a is attached to the socket 3a.

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

[0109] Similar to the first installation portion 54 of the lamp 2 in Embodiment 1, the first installation portion 54a of the lamp 2a has a first identification convex portion 56 as shown in FIG. 11. Since the definition of the height H1 of the first identification convex portion 56 in Embodiment 2 is the same as the definition of the height H1 of the first identification convex portion 56 in Embodiment 1, the description thereof is omitted.

[0110] Similar to the second installation portion 82 of the socket 3 in Embodiment 1, the second installation portion 82a of the socket 3a has a first identification concave portion 84 as shown in FIGS. 12 to 14. Since the definition of the depth L1 of the first identification concave portion 84 in Embodiment 2 is the same as the definition of the depth L1 of the first identification concave portion 84 in Embodiment 1, the description thereof is omitted.

[0111] Further, the first installation part 54a of the lamp 2a has a second identification recess 58 as in the case of the first installation part 54 of the lamp 2 in the first embodiment, as shown in FIG. 11. Since the definition of the depth L2 of the second identification recess 58 in the second embodiment is the same as the definition of the depth L2 of the second identification recess 58 in the first embodiment, the description thereof is omitted.

[0112] The second installation part 82a of the socket 3a has a second identification protrusion 86 as in the case of the second installation part 82 of the socket 3 in the first embodiment, as shown in FIGS. 12 to 14. Since the definition of the height H2 of the second identification protrusion 86 in the second embodiment is the same as the definition of the height H2 of the second identification protrusion 85 in the first embodiment, the description thereof is omitted.

[0113] The first installation part 54a of the lamp 2a in the second embodiment has a second identification recess 59 separately from the second identification recess 58, as shown in FIG. 11.

[0114] Each second identification recess 59 corresponds to a third characteristic in the lamp 2a. The size of the second identification recess 59 differs depending on whether the lamp 2a is dimming-compatible or not. More specifically, the radial width W3 of the first installation part 54a in the second identification recess 59 differs depending on whether the lamp 2a is dimming-compatible or not. For example, when the lamp 2a has a dimming function, the width W3 of the second identification recess 59 is 3 mm. When the lamp 2a does not have a dimming function, the width W3 of the second identification recess 59 is 1.5 mm.

[0115] Further, the second installation part 82a of the socket 3a in the second embodiment has a second identification protrusion 87 separately from the second identification protrusion 86, as shown in FIGS. 12 to 14.

[0116] Each second identification convex portion 87 corresponds to a third characteristic that the socket 3a allows for the third characteristic of the lamp 2. The size of the second identification convex portion 87 differs according to whether the socket 3a is dimming-compatible or not. More specifically, the radial width W4 of the second installation portion 82a in the second identification convex portion 87 differs according to whether the socket 3a is dimming-compatible or not. For example, when the socket 3a has a dimming function, the width W4 of the second identification convex portion 87 is 3 mm. When the socket 3a does not have a dimming function, the width W4 of the second identification convex portion 87 is 1.5 mm.

[0117] Note that when the second identification convex portion 87 of the socket 3 is inserted into the second identification concave portion 59 of the lamp 2, it is preferable that there is a gap between the second identification concave portion 59 and the second identification convex portion 87. The above gap is, for example, about 0.5 mm. From the above, the width W3 of the second identification concave portion 59 is preferably, for example, about 0.5 mm larger than the width W4 of the second identification convex portion 87. In this case, when the lamp 2 is dimming-compatible, the width W3 of the second identification concave portion 59 is 3.5 mm, and when the lamp 2 is not dimming-compatible, the width W3 of the second identification concave portion 59 is 2 mm. Note that the gap between the second identification concave portion 59 and the second identification convex portion 87 is not limited to 0.5 mm and is a value that can be appropriately selected.

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

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

[0120] (4) Effects Also in the lamp unit 1a according to the second embodiment, similar to the lamp unit 1 according to the first embodiment, the first identification convex portion 56 of the lamp 2 is smaller as the allowable range of the first characteristic is larger. Further, the first identification concave portion 84 of the socket 3 has a size into which the first identification convex portion 56 of the lamp 2 of the type that the socket 3 allows with respect to the first characteristic among a plurality of types of lamps 2 can be inserted, and the first identification convex portion 56 of the lamp of the type that the socket 3 does not allow with respect to the first characteristic among a plurality of types of lamps 2 has a size into which it cannot be inserted. Thereby, with respect to the first characteristic, the possibility of erroneously attaching an incompatible lamp 2 to the socket 3 can be reduced.

[0121] (5) Modification Hereinafter, a modification of the second embodiment will be described.

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

[0123] As a second modification of the second embodiment, the presence or absence of the second identification concave portion 59 of the lamp 2a and the presence or absence of the second identification convex portion 87 of the socket 3a may be changed according to the third characteristic (dimming function). The second modification is an example of the first modification in which the depth of the second identification concave portion 59 and the height of the second identification convex portion 87 are changed, and is a case where both the depth of the second identification concave portion 59 and the height of the second identification convex portion 87 are 0.

[0124] When the lamp 2a is dimming-compatible, the lamp 2a has the second identification concave portion 59, and when the lamp 2a is not dimming-compatible, the lamp 2a does not have the second identification concave portion 59. On the other hand, when the socket 3a is dimming-compatible, the socket 3a has the second identification convex portion 87, and when the socket 3a is not dimming-compatible, the socket 3a does not have the second identification convex portion 87.

[0125] Also in Modifications 1 and 2, when the socket 3a does not have a dimming function, either a lamp 2a without a dimming function or a lamp 2a with a dimming function can be attached to this socket 3a. On the other hand, when the socket 3a has a dimming function, a lamp 2a with a dimming function can be attached to this socket 3a, but a lamp 2a without a dimming function cannot be attached.

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

[0127] As another modification of Embodiment 2, each modification of Embodiment 1 may be applied to the lamp unit 1a.

[0128] Also in the lamp unit 1a according to each of the above modifications, the same effects as those of the lamp unit 1a according to Embodiment 2 are obtained.

[0129] (Embodiment 3) In Embodiment 3, a lighting fixture 9 using the lamp unit 1 will be described. Regarding the lamp unit 1 according to Embodiment 3, the same components as those of the lamp unit 1 according to Embodiment 1 (see FIG. 1) will be denoted by the same reference numerals and the description thereof will be omitted.

[0130] (1) Configuration As shown in FIG. 15, the lighting fixture 9 according to Embodiment 3 includes a lamp unit 1, a fixture body 91, and a power supply circuit 92. Regarding the lamp unit 1 according to Embodiment 3, the description of the same configuration and function as those of the lamp unit 1 of Embodiment 1 (see FIG. 1) will be omitted.

[0131] The instrument body 91 shown in Fig. 15 holds the socket 3. The instrument body 91 is formed of, for example, metal and has a bottomed cylindrical shape. The instrument body 91 has a bottom surface portion 911 and a side surface portion 912. The bottom surface portion 911 has a disc 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 so as to project from the outer peripheral end of the bottom surface portion 911 along the first direction D1. The instrument body 91 houses the lamp unit 1 in the internal space.

[0132] The power supply circuit 92 shown in Fig. 15 supplies load power to the light source 4 by power supply from an external power source. The external power source is, for example, a commercial power system of 100V or 200V, a power generation device that generates power using renewable energy, or a secondary battery. As shown by the broken line in Fig. 15, the power supply circuit 92 is housed in the socket body 8 of the socket 3, for example. Note that, as shown by the two-dot chain line in Fig. 15, the power supply circuit 92 may be housed not in the socket body 8 of the socket 3 but in the lamp body 5 of the lamp 2. In this case, for example, the input voltage of a commercial power system such as 100V or 200V is input from the socket 3 to the lamp 2 via the power supply pin 7, and the power supply circuit 92 housed in the lamp body 5 uses the input voltage input to the lamp 2 to supply the light source 4 with the load power for lighting the light source 4.

[0133] Considering the assumed temperature on the instrument body 91 side, it is necessary to consider the input power of the lamp 2 for the socket 3. In other words, the socket 3 allows a lamp 2 with a small input power but does not allow a lamp 2 with a large input power. The socket 3 allows a lamp 2 with an input power smaller than the assumed maximum allowable input power, but does not allow a lamp 2 that exceeds the assumed maximum allowable input power.

[0134] (2) Effect In the lighting fixture 9 according to Embodiment 3, in the lamp unit 1, the first identification convex portion 56 of the lamp 2 is smaller as the allowable range of the first characteristic is larger. Further, the first identification concave portion 84 of the socket 3 has a size into which the first identification convex portion 56 of the lamp 2 of the type that the socket 3 allows with respect to the first characteristic among a plurality of types of lamps can be inserted, and the first identification convex portion 56 of the lamp 2 of the type that the socket 3 does not allow with respect to the first characteristic among the plurality of types of lamps 2 has a size into which it cannot be inserted. Thereby, with respect to the first characteristic, the possibility of erroneously attaching an incompatible lamp 2 to the socket 3 can be reduced.

[0135] (3) Modification As a modification of Embodiment 3, the lighting fixture 9 may include the lamp unit 1a according to Embodiment 2 instead of the lamp unit 1.

[0136] Also in the lighting fixture 9 according to the above modification, the same effects as those of the lighting fixture 9 according to Embodiment 3 are achieved.

[0137] The embodiments and modifications described above are only a part of various embodiments and modifications of the present disclosure. Further, the embodiments and modifications can be variously changed according to design and the like as long as the object of the present disclosure can be achieved.

[0138] (Aspect) The following aspects are disclosed in this specification.

[0139] The lamp unit (1; 1a; 1c) according to the first aspect includes a lamp (2; 2a; 2c) and a socket (3; 3a; 3c). The socket (3; 3a; 3c) is capable of mounting the lamp (2; 2a; 2c). 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 socket (3; 3a; 3c) has a socket body (8; 8a; 8c). The lamp body (5; 5a; 5c) has a first identification convex portion (56). The first identification convex portion (56) has a size corresponding to the allowable range of the first characteristic in the lamp (2; 2a; 2c). The socket body (8; 8a; 8c) has a first identification concave portion (84). The first identification concave portion (84) has a size into which the first identification convex portion (56) can be inserted. The first identification convex portion (56) is smaller as the allowable range of the first characteristic is larger. The first identification concave portion (84) has a size into which the first identification convex portion (56) of the type of lamp that the socket (3; 3a; 3c) allows for the first characteristic among a plurality of types of lamps including the lamp (2; 2a; 2c) can be inserted, and has a size into which the first identification convex portion (56) of the type of lamp that the socket (3; 3a; 3c) does not allow for the first characteristic among the plurality of types of lamps cannot be inserted.

[0140] According to the lamp unit (1; 1a; 1c) according to the first aspect, with respect to the first characteristic, the possibility of mis-mounting an incompatible lamp (2; 2a; 2c) to the socket (3; 3a; 3c) can be reduced.

[0141] The lamp unit (1b) according to the second aspect includes a lamp (2b) and a socket (3b). The socket (3b) is capable of mounting the lamp (2b). 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 in the lamp (2b). The socket body (8b) has a first identification protrusion (84b). The first identification protrusion (84b) has a size that can be inserted into the first identification recess (56b). The first identification recess (56b) is larger as the allowable range of the first characteristic is larger. The first identification protrusion (84b) has a size that can be inserted into the first identification recess of the type of lamp that the socket (3b) allows with respect to the first characteristic among a plurality of types of lamps including the lamp (2b). The first identification protrusion (84b) has a size that cannot be inserted into the first identification recess (56b) of the type of lamp that the socket (3b) does not allow with respect to the first characteristic among a plurality of types of lamps.

[0142] According to the lamp unit (1b) according to the second aspect, with respect to the first characteristic, the possibility of mis-mounting an incompatible lamp (2b) onto the socket (3b) can be reduced.

[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 supply. 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) according to the third aspect, conduction between the lamp (2; 2a; 2b; 2c) and the socket (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 supply pins (7). The lamp body (5; 5a; 5c) has a first installation part (54; 54a). A plurality of power supply pins (7) are provided in the first installation part (54; 54a). The socket body (8; 8a; 8c) has a plurality of power supply holes (83) corresponding to the plurality of power supply pins (7). The lamp (2; 2a; 2c) and the socket (3; 3a; 3c) are relatively rotated with the plurality of power supply pins (7) respectively inserted into the plurality of power supply holes (83), whereby the lamp (2; 2a; 2c) is attached to the socket (3; 3a; 3c). The plurality of power supply pins (7) are provided in the first installation part (54; 54a) so as to be point-symmetrical with respect to the center (O1) of the first installation part (54; 54a). The first identification convex part (56) is provided in the first installation part (54; 54a) in a region on the center (O1) side of the plurality of power supply pins (7) and including the center (O1).

[0146] According to the lamp unit (1; 1a; 1c) according to the fourth aspect, since the first identification convex part (56) is provided at a position that does not prevent the rotation of the power supply pin (7) and the lamp (2; 2a; 2c), it does not prevent the rotation of the lamp (2; 2a; 2c), and no new space for the first identification convex part (56) is required.

[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) can be fitted 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) is different 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) is different depending on the type of lamp that the socket (3; 3a; 3b) allows for the second characteristic among a plurality of types of lamps.

[0148] According to the lamp unit (1; 1a; 1b) according to the fifth aspect, not only for the first characteristic but also for the second characteristic, it is possible to reduce the possibility of mis-mounting an incompatible lamp (2; 2a; 2b) onto the socket (3; 3a; 3b).

[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 at the peripheral edge (outer peripheral end 541) of the lamp body (5; 5a; 5b).

[0150] According to the lamp unit (1; 1a; 1b) according to the sixth aspect, the second identification recess (57; 58, 59) can be provided at a position where it does not interfere with the arrangement 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 allowable range of the third characteristic in the lamp (2; 2a; 2b) is larger. The second identification protrusion (85; 86, 87) is sized to be insertable into the second identification recess (57; 58, 59) of the type of lamp that the socket (3; 3a; 3b) allows for the third characteristic among a plurality of types of lamps, and is sized not to be insertable into the second identification recess (57; 58, 59) of the type of lamp that the socket (3; 3a; 3b) does not allow for the third characteristic among a plurality of types of lamps.

[0152] According to the lamp unit (1; 1a; 1b) according to the seventh aspect, not only the first characteristic and the second characteristic but also the third characteristic can reduce the possibility of misinstallation of an incompatible lamp (2; 2a; 2b) into the socket (3; 3a; 3b).

[0153] In the lamp unit (1c) according to the eighth aspect, in the third or fourth aspect, the lamp body (5c) further has a second identification protrusion (57c). The second identification protrusion (57c) corresponds to the second characteristic in the lamp (2c). The socket body (8c) further has a second identification recess (85c). The second identification recess (85c) can be fitted to the second identification protrusion (57c). The relative position between the second identification protrusion (57c) and the power supply pin (7) in the lamp (2c) differs depending on the second characteristic. The relative position between the second identification recess (85c) and the power supply hole (83) in the socket (3c) differs depending on the type of lamp that the socket (3c) allows for the second characteristic among a plurality of types of lamps.

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

[0155] In the lamp unit (1c) according to the tenth aspect, in the eighth or ninth aspect, the second identification convex portion (57c) is smaller as the allowable range of the third characteristic in the lamp (2c) is larger. The second identification concave portion (85c) has a size into which the second identification convex portion (57c) of the type of lamp that the socket (3c) allows for the third characteristic among a plurality of types of lamps can be inserted, and has a size into which the second identification convex portion (57c) of the type of lamp that the socket (3c) does not allow for the third characteristic among a 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 the input power that can be input to the lamp (2; 2a; 2b; 2c) or whether the lamp (2; 2a; 2b; 2c) has a dimming function. The third characteristic is the remaining one of the magnitude of the input power and whether the lamp (2; 2a; 2b; 2c) has a dimming function.

[0157] According to the lamp unit (1; 1a; 1b; 1c) according to the eleventh aspect, it is possible to reduce the possibility of misinstallation for characteristics that have a great influence on the lamp (2; 2a; 2b; 2c) and the socket (3; 3a; 3b; 3c).

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

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

[0160] In the lamp unit (1; 1a; 1b; 1c) according to the thirteenth aspect, in any one of the first to twelfth aspects, the first characteristic is the magnitude of the input power that can be input to the lamp (2; 2a; 2b; 2c) or whether the lamp (2; 2a; 2b; 2c) has a dimming function.

[0161] According to the lamp unit (1; 1a; 1b; 1c) according to the 13th aspect, it is possible to reduce the possibility of misinstallation for characteristics that are greatly affected in the lamp (2; 2a; 2b; 2c) and the socket (3; 3a; 3b; 3c).

[0162] The lighting fixture (9) according to the 14th aspect includes any one of the lamp units (1; 1a; 1b; 1c) of the 1st to 13th aspects and the fixture main body (91). The fixture main body (91) holds the socket (3; 3a; 3b; 3c).

[0163] According to the lighting fixture (9) according to the 14th aspect, in the lamp unit (1; 1a; 1b; 1c), it is possible to reduce the possibility of misinstallation of an incompatible lamp (2; 2a; 2b; 2c) into the socket (3; 3a; 3b; 3c) for the first characteristic.

[0164] The lamp (2; 2a; 2c) according to the 15th aspect is a lamp that can be mounted on the 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 arranged in the lamp body (5; 5a; 5c). The lamp body (5; 5a; 5c) has an identification convex portion (first identification convex portion 56). The identification convex portion has a size corresponding to the allowable range of the specified characteristic (first characteristic) in the lamp (2; 2a; 2c). The larger the allowable range of the specified characteristic, the smaller the identification convex portion.

[0165] According to the lamp (2; 2a; 2c) according to the 15th aspect, the identification convex portion (first identification convex portion 56) of the type of lamp that the socket (3; 3a; 3c) allows for a specified characteristic (first characteristic) among a plurality of types of lamps is of a size that can be inserted, and together with a socket (3; 3a; 3c) having an identification concave portion (first identification concave portion 84) that is of a size that does not allow the insertion of the identification convex portion of the type of lamp that the socket (3; 3a; 3c) does not allow for the specified characteristic among a plurality of types of lamps, it is possible to reduce the possibility of misinstallation of an incompatible lamp (2; 2a; 2c) into the socket (3; 3a; 3c) with respect to the specified characteristic.

[0166] The lamp (2b) according to the 16th aspect is a lamp that can be mounted on 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 concave portion (first identification concave portion 56b). The identification concave portion has a size corresponding to the allowable range of a specified characteristic (first characteristic) in the lamp (2b). The larger the allowable range of the specified characteristic, the larger the identification concave portion.

[0167] According to the lamp (2b) according to the 16th aspect, the identification concave portion (first identification concave portion 56b) of the type of lamp that the socket (3b) allows for a specified characteristic (first characteristic) among a plurality of types of lamps is of a size that can be inserted, and together with a socket (3b) having an identification convex portion (first identification convex portion 84b) that is of a size that does not allow the insertion of the identification concave portion of the type of lamp that the socket (3b) does not allow for the specified characteristic among a plurality of types of lamps, it is possible to reduce the possibility of misinstallation of an incompatible lamp (2b) into the socket (3b) with respect to the specified characteristic.

[0168] The socket (3; 3a; 3c) according to the 17th aspect is a socket into which a lamp (2; 2a; 2c) can be mounted. 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 has a size into which an identification projection (first identification projection 56) of the lamp (2; 2a; 2c) can be inserted. The identification recess has a size into which the identification projection of a type of lamp that the socket (3; 3a; 3c) allows with respect to the specified characteristics of the lamp among a plurality of types of lamps including the lamp (2; 2a; 2c) can be inserted, and has a size into which the identification projection of a type of lamp that the socket (3; 3a; 3c) does not allow with respect to the specified characteristics among the plurality of types of lamps cannot be inserted.

[0169] According to the socket (3; 3a; 3c) according to the 17th aspect, by being used together with a lamp (2; 2a; 2c) having an identification projection (first identification projection 56) that is smaller as the allowable range of the specified characteristics (first characteristics) is larger, the possibility of mis-mounting an incompatible lamp (2; 2a; 2c) onto the socket (3; 3a; 3c) with respect to the specified characteristics can be reduced.

[0170] The socket (3b) according to the 18th aspect is a socket into which a lamp (2b) can be mounted. The socket (3b) includes a socket body (8b). The socket body (8b) has an identification projection (first identification projection 84b). The identification projection has a size into which an identification recess (first identification recess 56b) of the lamp (2b) can be inserted. The identification projection has a size into which it can be inserted into the identification recess of a type of lamp that the socket (3b) allows with respect to the specified characteristics (first characteristics) of the lamp among a plurality of types of lamps including the lamp (2b), and has a size into which it cannot be inserted into the identification recess of a type of lamp that the socket (3b) does not allow with respect to the specified characteristics among the plurality of types of lamps.

[0171] According to the socket (3b) according to the 18th aspect, by being used together with a lamp (2b) having a larger identification recess (first identification recess 56b) as the allowable range of the specified characteristics (first characteristics) is larger, it is possible to reduce the possibility of incorrect attachment of an incompatible lamp (2b) to the socket (3b) with respect to the specified characteristics.

[0172] The appliance body unit according to the 19th aspect includes the socket (3; 3a; 3b; 3c) according to the 17th or 18th aspect and an appliance body (91). The socket (3; 3a; 3b; 3c) is attached to the appliance body (91).

[0173] According to the appliance body unit according to the 19th aspect, by being used together with the lamp (2; 2a; 2b; 2c), it is possible to reduce the possibility of incorrect attachment of an incompatible lamp (2; 2a; 2b; 2c) to the socket (3; 3a; 3b; 3c) with respect to the specified characteristics.

Explanation of Signs

[0174] 1, 1a, 1b, 1c Lamp unit 2, 2a, 2b, 2c Lamp 3, 3a, 3b, 3c Socket 4 Light source 5, 5a, 5b, 5c Lamp body 56 First identification convex portion 56b First identification concave portion 57, 58, 59 Second identification concave portions 57c Second identification convex portion 7 Power supply pin 8, 8a, 8b, 8c Socket body 83 Power supply hole 84 First identification concave portion 84b First identification convex portion 85, 86, 87 Second identification convex portions 85c Second identification concave portion 9 Lighting fixture 91 Appliance body θ1, θ2 Position angles O1, O2 Centers

Claims

1. A lamp and, a socket to which the lamp can be attached, comprising: The lamp includes: a light source, a lamp body in which the light source is disposed, and a power supply pin provided on the lamp body for receiving power supply; The socket includes: a socket body, The lamp body has: an identification recess located outside the power supply pin and having a size corresponding to an allowable range of characteristics of the lamp, The socket body has: a power supply hole into which the power supply pin can be inserted, and an identification protrusion located outside the power supply hole and having a size that can be inserted into the identification recess; The larger the allowable range of the characteristics of the lamp, the larger the identification recess; The identification protrusion is: a size that can be inserted into the identification recess of a lamp of a type that the socket allows with respect to the characteristics among a plurality of types of lamps including the lamp, and a size that cannot be inserted into the identification recess of a lamp of a type that the socket does not allow with respect to the characteristics among the plurality of types of lamps; A lamp unit.

2. The identification protrusion can be fitted into the identification recess, The lamp unit according to Claim 1.

3. The identification recess is provided at a peripheral edge of the lamp body, The lamp unit according to Claim 1 or 2.

4. A lamp and, a socket to which the lamp can be attached, comprising: The lamp includes: a light source, a lamp body in which the light source is disposed, and a power supply pin provided on the lamp body for receiving power supply; The socket includes: a socket body, The lamp body has: an identification protrusion located outside the power supply pin and having a size corresponding to an allowable range of characteristics of the lamp, The socket body has: a power supply hole into which the power supply pin can be inserted, and an identification recess located outside the power supply hole and having a size that can be inserted into the identification protrusion; The larger the allowable range of the characteristics of the lamp, the smaller the identification protrusion; The identification recess is: a size that can be inserted into the identification protrusion of a lamp of a type that the socket allows with respect to the characteristics among a plurality of types of lamps including the lamp, and a size that cannot be inserted into the identification protrusion of a lamp of a type that the socket does not allow with respect to the characteristics among the plurality of types of lamps; A lamp unit.

5. The identification recess can be fitted into the identification protrusion, The lamp unit according to claim 4.

6. The identification convex portion is provided at a peripheral portion of the lamp body. The lamp unit according to claim 4 or 5.

7. The characteristic is either the magnitude of the input power that can be input to the lamp or whether the lamp has a dimming function. The lamp unit according to any one of claims 1 to 6.

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

9. The lamp includes a plurality of power supply pins including the power supply pin. The lamp body has an installation portion where the plurality of power supply pins are provided. The socket body includes the power supply holes and has a plurality of power supply holes corresponding to the plurality of power supply pins. The lamp and the socket are relatively rotated with the plurality of power supply pins inserted into the plurality of power supply holes respectively, so that the lamp is attached to the socket. The plurality of power supply pins are provided in the installation portion so as to be point-symmetrical with respect to the center of the installation portion. The lamp unit according to any one of claims 1 to 8.

10. The lamp unit according to any one of claims 1 to 9, and an instrument body that holds the socket. Lighting fixture.

11. A lamp that can be attached to a socket, including a light source, a lamp body on which the light source is disposed, and a power supply pin provided on the lamp body for receiving power supply. The lamp body has an identification convex portion located outside the power supply pin and having a size corresponding to an allowable range of a specified characteristic of the lamp. The larger the allowable range of the specified characteristic in the lamp, the smaller the identification convex portion. Lamp.

12. A lamp that can be attached to a socket, including a light source, a lamp body on which the light source is disposed, and a power supply pin provided on the lamp body for receiving power supply. The lamp body has an identification concave portion located outside the power supply pin and having a size corresponding to an allowable range of a specified characteristic of the lamp. The larger the allowable range of the specified characteristic in the lamp, the larger the identification concave portion. Lamp.

13. A socket to which a lamp having a power supply pin for receiving power supply can be attached, including a socket body, The socket body a power supply hole into which the power supply pin of the lamp can be inserted; an identification recess that is located outside the power supply hole and has a size into which the identification convex portion of the lamp can be inserted; The identification recess has a size into which the identification convex portion of a lamp of a type acceptable to the socket with respect to the specified characteristics of the lamp among a plurality of types of lamps including the lamp, and has a size into which the identification convex portion of a lamp of a type unacceptable to the socket with respect to the specified characteristics among the plurality of types of lamps cannot be inserted. Socket.

14. A socket onto which a lamp having a power supply pin for receiving power supply can be mounted, comprising a socket body, The socket body has a power supply hole into which the power supply pin of the lamp can be inserted, and an identification convex portion that is located outside the power supply hole and can be inserted into the identification recess of the lamp, The identification convex portion has a size into which it can be inserted into the identification recess of a lamp of a type acceptable to the socket with respect to specified characteristics among a plurality of types of lamps including the lamp, and has a size into which it cannot be inserted into the identification recess of a lamp of a type unacceptable to the socket with respect to the specified characteristics among the plurality of types of lamps. Socket.

15. A socket according to claim 13 or 14, and an appliance body to which the socket is attached. Appliance body unit.

Images