Power supply socket and illumination device

Abstract

To reduce the sizes of a power supply socket and an illumination device in a direction intersecting a direction in which a power supply terminal of a light source unit is inserted.SOLUTION: A power supply socket 1 comprises a conductive part electrically connected to a power supply terminal, and a main body 10 accommodating the conductive part. The main body 10 has a first plate part 110 and a second plate part 120 facing each other. The first plate part 110 is provided with a terminal insertion hole H1 and a guide hole H3. The terminal insertion hole H1 is a hole into which the power supply terminal is inserted in a first orientation. The guide hole H3 is a hole guiding the power supply terminal inserted into the terminal insertion hole H1 to a connection position where the power supply terminal is electrically connected to the conductive part. The second plate part 120 is provided with an electric wire insertion hole H4 into which an electric wire supplying power to the conductive part is inserted in a second orientation opposite to the first orientation. The electric wire insertion hole H4 is provided at a position not overlapping the terminal insertion hole H1 and the guide hole H3 in plan view from one direction including the first orientation and the second orientation.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a power supply socket and a lighting device, and more particularly to a power supply socket that supplies power to a light source unit and a lighting device that includes the power supply socket. [Background technology]

[0002] Patent Document 1 discloses a socket into which a terminal pin of a lamp unit is inserted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 005244 Summary of the Invention [Problem to be solved by the invention]

[0004] In a socket (power supply socket) such as that described in Patent Document 1, it is desirable to reduce the size in a direction intersecting the direction in which the terminal pins (power supply terminals) of the lamp unit (light source unit) are inserted.

[0005] The present disclosure has been made in view of the above-mentioned circumstances, and aims to provide a power feed socket and a lighting device that can be made smaller in size in a direction intersecting the direction in which the power feed terminal of the light source unit is inserted. [Means for solving the problem]

[0006] A power feed socket according to one aspect of the present disclosure includes a conductive part electrically connected to a power feed terminal of a light source unit, and a main body that houses the conductive part. The main body has a first plate part and a second plate part that face each other. The first plate part is provided with a terminal insertion hole into which the power feed terminal is inserted in a first orientation, and a guide hole that is connected to the terminal insertion hole and guides the power feed terminal inserted into the terminal insertion hole to a connection position where the power feed terminal is electrically connected to the conductive part. The second plate part is provided with a wire insertion hole into which an electric wire that supplies power to the conductive part is inserted in a second orientation opposite to the first orientation. The wire insertion hole is located at a position that does not overlap with the terminal insertion hole and the guide hole in a plan view from a direction that includes the first orientation and the second orientation.

[0007] An illumination device according to one aspect of the present disclosure includes the power supply socket and the light source unit. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to reduce the size of the power supply socket and the lighting device in a direction intersecting the direction in which the power supply terminal of the light source unit is inserted. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a top perspective view of a lighting device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view of the lighting device from above. [Figure 3] FIG. 3 is an exploded perspective view of the lower side of the lighting device. [Figure 4] FIG. 4 is an exploded top perspective view of a power supply socket according to an embodiment of the present disclosure. [Figure 5] FIG. 5 is a top view of the power supply socket. [Figure 6] FIG. 6 is a top view of the power socket with the light source unit attached thereto, with the second body removed. [Figure 7]FIG. 7 is a top view of the power socket with the light source unit attached thereto, with the second body removed. [Figure 8] FIG. 8 is a cross-sectional view of the power supply socket. [Figure 9] FIG. 9 is a front view of a lighting device according to an embodiment of the present disclosure. [Figure 10] FIG. 10 is a cross-sectional view of a modified power socket. DETAILED DESCRIPTION OF THE INVENTION

[0010] A power feed socket 1 and a lighting device 100 including the power feed socket 1 according to an embodiment of the present disclosure will be described in detail with reference to the drawings. Note that the embodiment and modifications described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiment and modifications. Various modifications other than the embodiment and modifications can be made depending on the design, etc., as long as they do not deviate from the technical concept of the present disclosure. Furthermore, the following embodiments (including modifications) may be realized in appropriate combinations.

[0011] (1) Overview 1 to 3, the lighting device 100 according to this embodiment includes a power feed socket 1 and a light source unit 2. The light source unit 2 is attached to the power feed socket 1.

[0012] As shown in FIGS. 2 to 4, the power feed socket 1 includes a conductive part 13 electrically connected to a power feed terminal 21 of the light source unit 2, and a main body (socket main body) 10 that houses the conductive part 13.

[0013] The socket body 10 has a first plate portion (bottom portion) 110 and a second plate portion (bottom portion) 120 that face each other.

[0014] 5 to 7, the bottom 110 is provided with a terminal insertion hole (first insertion hole) H1 and a guide hole H3. The first insertion hole H1 is a hole into which the power supply terminal 21 is inserted in a first orientation. The guide hole H3 is connected to the first insertion hole H1 and is a hole that guides the power supply terminal 21 inserted into the first insertion hole H1 to a connection position where the power supply terminal 21 is electrically connected to the conductive portion 13.

[0015] The bottom 120 is provided with a wire insertion hole H4 into which an electric wire W1 that supplies power to the conductive portion 13 is inserted in a second direction opposite to the first direction. The wire insertion hole H4 is provided at a position that does not overlap with the first insertion hole H1 and the guide hole H3 in a plan view from a direction that includes the first direction and the second direction.

[0016] According to the above configuration, the electric wire W1 inserted into the electric wire insertion hole H4 extends along one direction including the first direction and the second direction inside the power feeding socket 1. Therefore, in order to route the electric wire W1, it is not necessary to expand the internal space Sp1 of the power feeding socket 1 in a direction (second direction) intersecting the one direction (first direction) including the first direction and the second direction, and the power feeding socket 1 and the lighting device 100 can be made smaller in size in the second direction.

[0017] (2) Composition The lighting device 100 according to an embodiment of the present disclosure will be described in detail below. In the following description, the front-rear direction, left-right direction, and up-down direction (vertical direction) indicated by arrows in the drawings are defined as the front-rear direction, left-right direction, and up-down direction of the lighting device 100 and its components. However, these directions are not intended to limit the directions of the lighting device 100 and its components when in use. Furthermore, the arrows indicating "front," "rear," "left," "right," "up," and "down" in the drawings are merely shown for the purpose of explanation and do not have any physical substance.

[0018] In this embodiment, the lighting device 100 is a downlight that emits light vertically downward. However, the lighting device 100 may be a spotlight or the like that is capable of changing the direction of light emission.

[0019] 1 to 3, the lighting device 100 includes a light source unit 2, a power socket 1, a cover member 6, a terminal block 7, and a mounting member 8. In this embodiment, the lighting fixture 1, which is a downlight, is embedded in the ceiling so that light is emitted from the light source unit 2 vertically downward.

[0020] (2.1) Light source unit As shown in FIGS. 1 to 3, the light source unit 2 is detachably attached to the power feed socket 1. Commercial power is input to the power feed socket 1 from an external power source via a terminal block 7 (described later) and a pair of electric wires W1 (see FIG. 8) that electrically connects the terminal block 7 and the power feed socket 1. The power input to the power feed socket 1 is supplied to the light source unit 2 attached to the power feed socket 1.

[0021] The light source unit 2 has a main body 20, a pair of power supply terminals 21, a protrusion 22, a lens 23, and a light source (not shown).

[0022] The main body 20 is a cylindrical member made of an insulating material such as synthetic resin.

[0023] An opening 201 is provided at one axial end of the main body 20. A lens 23 is fitted in the opening 201.

[0024] The light source unit is housed inside the main body unit 20. The light source unit has a light-emitting element such as an LED (Light Emitting Diode), and a light-emitting circuit that receives power supplied from the power supply socket 1 and causes the light-emitting element to emit light.

[0025] Light emitted from the light source unit (light-emitting element) is emitted to the outside through lens 23. Here, lens 23 is configured so that the optical axis Ax1 of the light emitted from the light source unit through lens 23 coincides with the axis of main body 20, which is cylindrical.

[0026] The main body 20 has a mounting plate 202 on the side opposite the opening 201. The mounting plate 202 is one surface of the main body 20 opposite the opening 201. The mounting plate 202 has a circular shape when viewed in a plan view from a direction along the optical axis Ax1.

[0027] The mounting plate 202 is provided with a pair of through holes 203 that penetrate the mounting plate 202 in the thickness direction. The pair of through holes 203 are provided so as to be point symmetric with respect to the axis of the cylindrical main body 20. A pair of power supply terminals 21 electrically connected to the light source unit are inserted into the pair of through holes 203, respectively. In other words, the pair of power supply terminals 21 are point symmetric with respect to the center point of the mounting plate 202.

[0028] The pair of power supply terminals 21 are provided so as to protrude outward (upward) from the mounting plate portion 202. The pair of power supply terminals 21 are terminals that receive power from the power supply socket 1 to make the light source portion of the light source unit 2 emit light. The pair of power supply terminals 21 receive power from the power supply socket 1 when the light source unit 2 is attached to the power supply socket 1.

[0029] As shown in FIGS. 6 and 7, the power supply terminal 21 has a small diameter portion 211 and a large diameter portion 212. The small diameter portion 211 is a cylindrical member formed to extend upward from the mounting plate portion 202. The large diameter portion 212 is a disk-shaped member formed at the tip of the small diameter portion 211. The diameter of the large diameter portion 212 is larger than the diameter of the small diameter portion 211. The light source unit 2 is attached to the power supply socket 1 by inserting the large diameter portions 212 of the pair of power supply terminals 21 into a pair of first insertion holes H1 (see FIGS. 6 and 7) of the power supply socket 1, respectively, and rotating the light source unit 2 by a predetermined angle.

[0030] The protrusion 22 protrudes outward (upward) from the mounting plate 202. The protrusion 22 is inserted into a second insertion hole H2 of the power supply socket 1, which will be described later. The protrusion 22 is formed in a cylindrical shape. The cylindrical protrusion 22 is formed so that the axis of the protrusion 22 coincides with the axis of the main body 20, which is also cylindrical. The protrusion 22 accommodates a part of the light source portion of the light source unit 2 therein.

[0031] 6 and 7, the light source unit 2 further has a pair of protrusions 24 aligned in the radial direction of the protrusion 22. Here, the radial direction of the protrusion 22 in which the pair of protrusions 24 are aligned is a direction that intersects with the front-to-rear direction. The pair of protrusions 24 protrude in opposite directions from the side surface of the protrusion 22 along the radial direction of the protrusion 22. More specifically, the pair of protrusions 24 are provided point-symmetrically with respect to the axis of the cylindrical protrusion 22.

[0032] 6 and 7, the width of at least one of the pair of protrusions 24 narrows toward the tip. In this embodiment, the width of each of the pair of protrusions 24 narrows toward the tip. More specifically, the width of the protrusion 24 in the tangential direction of the peripheral edge of the protrusion 22 narrows toward the tip along the protruding direction of the protrusion 24.

[0033] Here, the pair of protrusions 24 are provided at positions where a line segment connecting the center points of the pair of protrusions 24 and a line segment connecting the center points of the pair of power supply terminals 21 intersect at right angles. Note that "perpendicular" in this disclosure includes cases where the two are strictly perpendicular to each other, as well as cases where the angle between the two has an error of a few degrees (for example, less than 5 degrees) from 90°. This allows the support points of the light source units 2 on the power supply socket 1 to be evenly distributed, enabling the power supply socket 1 to hold the light source units 2 evenly.

[0034] (2.2) Power socket As shown in FIGS. 2 to 4, the power feed socket 1 has a main body (socket main body) 10. The socket main body 10 is configured by combining a first main body 11 and a second main body 12 in one direction (the vertical direction in this embodiment). As shown in FIGS. 4, 6, and 7, the power feed socket 1 also has a pair of conductive parts 13 and a pair of spring parts 14. The pair of conductive parts 13 and the pair of spring parts 14 are housed in an internal space Sp1 of the socket main body 10 (see FIG. 8). Note that FIGS. 6 and 7 are top views of the power feed socket 1 and the light source unit 2 when the second main body 12 is removed from the power feed socket 1 with the light source unit 2 attached.

[0035] The first body 11 is made of an insulating material such as synthetic resin, etc. The first body 11 includes a bottom portion (first plate portion) 110, an inner wall portion 111, and an outer wall portion 115, as shown in Figures 4, 6, and 7.

[0036] 6 and 7, the bottom 110 is provided with a pair of first insertion holes (terminal insertion holes) H1, a pair of guide holes H3, and a second insertion hole H2.

[0037] The first insertion hole H1 is a circular through-hole that penetrates the bottom 110 in the thickness direction. The diameter of the first insertion hole H1 is larger than the diameter of the large diameter portion 212 of the power supply terminal 21. The pair of first insertion holes H1 are provided symmetrically with respect to the center point C1 of the bottom 110. The pair of power supply terminals 21 are inserted upward into the pair of first insertion holes H1.

[0038] The guide hole H3 is a through-hole that penetrates the bottom portion 110 in the thickness direction. In a plan view from the first direction (the vertical direction in this embodiment), the guide hole H3 has an arc shape centered on the center point C1 of the disk-shaped bottom portion 110. The pair of guide holes H3 are provided to be point-symmetrical with respect to the center point C1. Here, the pair of guide holes H3 are respectively connected to the pair of first insertion holes H1. More specifically, the guide holes H3 extend along a circular path from the first insertion holes H1 around the center point C1. The width of the guide hole H3 (the width in the radial direction of the bottom portion 110) is smaller than the diameter of the large diameter portion 212 of the power supply terminal 21 and larger than the diameter of the small diameter portion 211 of the power supply terminal 21. As a result, by rotating the light source unit 2 around the center point C1 with the pair of large diameter portions 212 inserted into the pair of first insertion holes H1, the power supply terminal 21 can be moved along the guide hole H3. Also, at this time, since the diameter of the guide hole H3 is smaller than the diameter of the large diameter portion 212, movement of the light source unit 2 in a second direction (downward in this embodiment) opposite to the first direction (upward in this embodiment) in which the pair of large diameter portions 212 are inserted into the pair of first insertion holes H1 is restricted.

[0039] The pair of guide holes H3 guide the pair of power supply terminals 21 inserted into the pair of first insertion holes H1 to a connection position where the pair of power supply terminals 21 are electrically connected to the pair of conductive portions 13.

[0040] The second insertion hole H2 is a circular through-hole that penetrates the bottom 110 in the thickness direction. The second insertion hole H2 is provided between the pair of first insertion holes H1. The second insertion hole H2 is provided at a position such that the center point of the circle coincides with the center point C1 of the bottom 110. The diameter of the second insertion hole H2 is larger than the diameter of the protrusion 22 of the light source unit 2. When the pair of power supply terminals 21 are inserted into the pair of first insertion holes, the protrusion 22 is inserted upward into the second insertion hole H2.

[0041] As shown in FIGS. 4, 6 to 8, the inner wall portion 111 has a pair of guide walls 112, a pair of groove portions 113, and a pair of restriction portions 114.

[0042] The pair of guide walls 112 extend upward from the peripheral edge H20 (see FIG. 6) of the second insertion hole H2. The pair of guide walls 112 are provided point-symmetrically with respect to the center point C1 of the bottom portion 110. The pair of guide walls 112 guide the protrusion 22 inserted upward from the second insertion hole H2. As shown in FIG. 8, when the first main body 11 and the second main body 12 are combined, the tip of the guide wall 112 faces the bottom portion 120 of the second main body 12 with a small gap therebetween.

[0043] The pair of grooves 113 are grooves recessed in opposite directions from the periphery H20 of the second insertion hole H2 in a plan view from the up-down direction. The pair of grooves 113 are grooves that extend along the up-down direction.

[0044] The pair of grooves 113 are provided symmetrically with respect to the center point C1 of the bottom portion 110.

[0045] As shown in FIG. 6 , a line L1 connecting the pair of grooves 113 intersects with a line L2 connecting the pair of first insertion holes H1. The lines L1 and L2 shown in FIG. 6 are merely examples. The line L1 may extend in any direction as long as it passes through the center point C1 and passes through any point included in one of the pair of grooves 113 and any point included in the other of the pair of grooves 113. The line L2 may extend in any direction as long as it passes through the center point C1 and passes through any point included in one of the pair of first insertion holes H1 and any point included in the other of the pair of first insertion holes H1. This ensures a sufficient distance between the grooves 113 and the first insertion holes H1, thereby improving the strength of the power feed socket 1.

[0046] As shown in FIG. 6, the line L1 connecting the pair of grooves 113 intersects with the line L3 connecting the pair of guide holes H3. Note that the lines L1 and L3 shown in FIG. 6 are merely examples. The line L3 may extend in any direction as long as it passes through the center point C1 and passes through any point included in one of the pair of guide holes H3 and any point included in the other of the pair of guide holes H3. This ensures a sufficient distance between the grooves 113 and the guide holes H3, thereby improving the strength of the power feed socket 1.

[0047] When the protrusion 22 is inserted upward into the second insertion hole H2, a pair of protrusions 24 protruding in opposite directions from the side surfaces of the protrusion 22 are inserted into the pair of grooves 113, as shown in Figure 6.

[0048] The pair of restricting portions 114 extend upward from the periphery H20 of the second insertion hole H2. That is, the pair of restricting portions 114 are arc-shaped in a plan view from the vertical direction. As described above, the second insertion hole H2 is provided between the pair of first insertion holes H1. That is, the pair of restricting portions 114 extending upward from the periphery H20 of the second insertion hole H2 are located inside the pair of guide holes H3 that are respectively connected to the pair of first insertion holes H1 in a plan view from the vertical direction.

[0049] As shown in FIG. 8 , the pair of restricting portions 114 are adjacent to the pair of grooves 113 in the circumferential direction around the center point C1. The pair of restricting portions 114 are provided point-symmetrically with respect to the center point C1 of the bottom portion 110. Here, the length of the restricting portions 114 in the vertical direction is shorter than the length of the guide wall in the vertical direction. As a result, when the first body 11 and the second body 12 are combined, a gap G1 that is continuous with the grooves 113 is formed between the restricting portions 114 and the bottom portion 120 of the second body 12. In other words, a pair of gaps G1 are formed in the socket body 10. The protrusions 24 inserted into the grooves 113 move in contact with the restricting portions 114 in the gap G1 by rotating the light source unit 2 around the center point C1.

[0050] When the pair of power supply terminals 21 are guided to the connection position by the pair of guide holes H3, the pair of regulating portions 114 come into contact with the pair of protrusions 24, respectively, thereby regulating the movement of the protrusions 22 in the second direction.

[0051] The outer wall 115 extends upward from the entire periphery of the outer edge of the bottom 110 .

[0052] The bottom 110, the inner wall 111, the outer wall 115, and the bottom 120 of the second main body 12 define an internal space Sp1 in which a pair of conductive parts 13 and a pair of spring parts 14, which will be described later, are housed.

[0053] 8, the first body 11 has a pair of holding portions 1100 that protrude from a first surface S1 on the first-facing side (upper side) of the bottom portion 110. The pair of holding portions 1100 hold the pair of conductive portions 13, respectively.

[0054] As shown in FIGS. 4, 6, and 7, the holding portion 1100 has a fixing groove 1101 that is a groove extending downward. A fixing piece 131 of the conductive portion 13 is inserted into the fixing groove 1101. Furthermore, as shown in FIG. 10, the holding portion 1100 has an insertion hole B1 into which the electric wire W1 inserted downward into the electric wire insertion hole H4 is inserted. The insertion hole B1 is a hole with a bottom. The electric wire W1 is inserted downward into the electric wire insertion hole H4 and is electrically connected to the conductive portion 13 held by the holding portion 1100. The electric wire W1 is inserted into the insertion hole B1 until the tip of the electric wire W1 contacts the bottom surface S3 of the insertion hole B1. Note that the electric wire W1 may be fixed by the sheath portion contacting a tapered portion provided in the electric wire insertion hole H4 before the tip of the electric wire W1 contacts the bottom surface S3.

[0055] The bottom surface S3 of the insertion hole B1 is located between the first surface S1 and the second surface S2 in the vertical direction. The second surface S2 is the surface of the bottom portion 110 opposite to the first surface S1. In other words, because the bottom surface S3 is located below the first surface S1, the electric wire W1 can be inserted into the insertion hole B1 to a position below the first surface S1. This ensures that the insertion length of the electric wire W1 in the insertion hole B1 is sufficient while preventing the socket main body 10 (first main body 11) from becoming longer in the vertical direction.

[0056] The second main body 12 is made of an insulating material such as synthetic resin. As shown in Figs. 4 and 8, the second main body 12 includes a disk-shaped bottom portion (second plate portion) 120, a pair of guide portions 121, and an outer wall portion 122. That is, the pair of guide portions 121 are made of an insulating material. Note that the pair of guide portions 121 may also be made of a conductor such as metal.

[0057] The bottom 120 is a disk-shaped member. When the first body 11 and the second body 12 are combined, the bottom 120 faces the bottom 110 of the first body 11 in the up-down direction across the internal space Sp1.

[0058] The bottom portion 120 is provided with a pair of wire insertion holes H4.

[0059] A pair of electric wires W1 drawn from the terminal block 7 are inserted downward into the pair of electric wire insertion holes H4. The pair of electric wires W1 inserted into the pair of electric wire insertion holes H4 extend downward in the internal space Sp1. Therefore, there is no need to expand the internal space Sp1 of the power feed socket 1 in a direction intersecting with the vertical direction to route the electric wires W1, and the power feed socket 1 and the lighting device 100 can be made smaller in the direction intersecting with the vertical direction.

[0060] As shown in FIG. 5 , the wire insertion hole H4 is positioned so as not to overlap with the first insertion hole H1 and the guide hole H3 in a top-bottom plan view. More specifically, the wire insertion hole H4 is positioned on the opposite side of the guide hole H3 from the first insertion hole H1 in a top-bottom plan view. The guide hole H3 guides the power supply terminal 21 inserted into the first insertion hole H1 to a connection position where the power supply terminal 21 is electrically connected to the conductive portion 13. In other words, the conductive portion 13 is positioned on the opposite side of the guide hole H3 from the first insertion hole H1 in a top-bottom plan view. In other words, the wire insertion hole H4 is positioned so as to overlap with the conductive portion 13 in a top-bottom plan view. This prevents the path of the wire W1 inserted into the wire insertion hole H4 until it is connected to the conductive portion 13 from becoming too long. This also reduces the vertical length of the conductive portion 13 or simplifies the shape of the conductive portion 13.

[0061] Furthermore, in a plan view from the top and bottom, the wire insertion hole H4 is provided on an extension of the arc shape of the guide hole H3. More specifically, the wire insertion hole H4 is provided on an imaginary circle CL1 along which the arc shape of the guide hole H3 extends. This allows the power supply terminal 21 to be electrically connected to the conductive portion 13 to which the electric wire W1 is connected through the wire insertion hole H4 by moving the power supply terminal 21 along the guide hole H3.

[0062] The pair of electric wires W1 inserted through the pair of electric wire insertion holes H4 are electrically connected to the pair of conductive parts 13 housed in the internal space Sp1, respectively.

[0063] The pair of guide portions 121 protrude from a first surface S4 on the first facing side (upper side) of the bottom portion 120.

[0064] As shown in FIG. 5, the guide portion 121 includes an electric wire guide portion 1211 and a reinforcing portion 1212.

[0065] The wire guide portion 1211 is an annular portion that protrudes upward from the periphery of the wire insertion hole H4. The wire guide portion 1211 guides the wire W1, which is inserted downward, into the wire insertion hole H4. The wire W1 is guided by the guide portion 1211, so that the wire W1 can be reliably inserted into the wire insertion hole H4. This also allows the wire W1 to be reliably connected to the conductive portion 13.

[0066] Furthermore, as described above, the guide portion 121 having the electric wire guide portion 1211 is formed of an insulating material. Therefore, the guide portion 121 can insulate the portion of the electric wire W1 inserted into the internal space Sp1 from the outside. Furthermore, by realizing the insulation between the portion of the electric wire W1 inserted into the internal space Sp1 and the outside by the guide portion 121 protruding upward from a portion of the bottom portion 120, it is possible to prevent the vertical dimension of the entire second main body 12 from increasing. This also makes it possible to prevent the vertical dimension of the lighting device 100 from increasing.

[0067] The reinforcing portion 1212 is a rail-shaped portion extending from the wire guide portion 1211 on the bottom portion 120. As shown in Figures 5 and 9, the tip of the reinforcing portion 1212 is provided with a recessed portion 1213 recessed downward. That is, the guide portion 121 has the recessed portion 1213 recessed downward.

[0068] The outer wall portion 122 extends downward from the entire periphery of the outer edge portion of the bottom portion 120. The outer wall portion 122 is disposed inside the outer wall portion 115 of the first main body portion 11 when the first main body 11 and the second main body 12 are combined together.

[0069] The pair of conductive parts 13 are formed, for example, from a plate-shaped metal member. The pair of conductive parts 13 are provided point-symmetrically with respect to a center point C1, as shown in Figs.

[0070] The conductive portion 13 has a fixed piece 131, an insertion piece 132, and a terminal contact piece 133. In this embodiment, the fixed piece 131, the insertion piece 132, and the terminal contact piece 133 are integrally formed.

[0071] The fixing piece 131 is a flat plate-shaped member. The fixing piece 131 is inserted downward into the fixing groove 1101 of the holding part 1100. This fixes the conductive part 13 to the first main body 11. Here, the conductive part 13 is fixed to a position in the first main body 11 adjacent to the end of the guide hole H3 on the opposite side from the first insertion hole H1.

[0072] The terminal contact piece 133 protrudes toward the guide hole H3 from one end (the lower end in this embodiment) of the fixing piece 131 fixed to the first main body 11. Here, the large diameter portion 212 of the power supply terminal 21, which is inserted through the first insertion hole H1 and moved along the guide hole H3, comes into contact with the terminal contact piece 133. As a result, the power supply terminal 21 is electrically connected to the conductive portion 13. Here, as described above, the fixing piece 131 from which the terminal contact piece 133 protrudes is inserted into the fixing groove 1101 of the holding part 1100, thereby fixing the conductive portion 13 to the first main body 11. Therefore, when the power supply terminal 21 is electrically connected to the conductive portion 13, movement of the conductive portion 13 is restricted. In other words, the holding part 1100 holds the conductive portion 13 so as to restrict movement of the conductive portion 13 when the power supply terminal 21 is electrically connected to the conductive portion 13. This makes it possible to prevent the conductive portion 13 from moving when the power supply terminal 21 is moved along the guide hole H3 and connected to the conductive portion 13, due to the power supply terminal 21 pressing against it.

[0073] The insertion piece 132 protrudes from the other end (upper end in this embodiment) of the fixed piece 131 to the side opposite the guide hole H3. Here, the electric wire W1 inserted through the electric wire insertion hole H4 is clamped between the insertion piece 132 and the fixed piece 131. In this manner, the pair of electric wires W1 inserted through the pair of electric wire insertion holes H4 are electrically connected to the pair of conductive portions 13 housed in the internal space Sp1, respectively. In other words, commercial power is input to the pair of conductive portions 13 from an external power source via the pair of electric wires W1 inserted through the pair of electric wire insertion holes H4.

[0074] The pair of spring portions 14 are formed, for example, from a plate-shaped metal member. The pair of conductive portions 13 are provided so as to be point-symmetrical with respect to the center point C1.

[0075] The spring portion 14 has a fixed end piece 141, a spring piece 142, and a free end piece 143. In this embodiment, the fixed end piece 141, the spring piece 142, and the free end piece 143 are integrally formed.

[0076] The fixed end piece 141 is a plate-like member formed in a hook shape. The fixed end piece 141 is fixed to the first main body 11 by being hooked onto a columnar portion 1102 provided on the bottom portion 110 of the first main body 11.

[0077] The free end piece 143 is a flat member. The free end piece 143 is inserted into a holding groove 1103 provided in the bottom 110 of the first main body 11. The free end piece 143 is held in the holding groove 1103 in a state where it can move along the holding groove 1103.

[0078] The spring piece 142 is a plate-like member formed in a mountain shape that connects the fixed end piece 141 and the free end piece 143. The mountain-shaped spring piece 142 protrudes outward from the center point C1. The apex of the spring piece 142 overlaps with the guide hole H3 in a plan view from the top-bottom direction.

[0079] (2.3) Cover member The cover member 6 is a cylindrical member made of a material with high thermal conductivity, such as aluminum. In this embodiment, the lighting device 100 is embedded in the ceiling so that the axial direction of the cover member 6 is aligned vertically.

[0080] 3, an opening 61 is provided at one axial end (lower end) of the cover member 6. In addition, as shown in FIG. 2, the cover member 6 has an attachment plate portion 62 at the other axial end (upper end).

[0081] The cover member 6 accommodates the power feed socket 1 and the light source unit 2 attached to the power feed socket 1. Specifically, the power feed socket 1 and the light source unit 2 are inserted into the cover member 6 through the opening 61 from the power feed socket 1 side.

[0082] The mounting plate portion 62 is provided with a pair of through holes 621 that penetrate the mounting plate portion 62 in the thickness direction.

[0083] When the power feed socket 1 and the light source unit 2 are housed inside the cover member 6, the bottom 120 of the power feed socket 1 (second main body 12) comes into contact with the mounting plate 62. At this time, a pair of guide portions 121 protruding from the first surface S4 of the bottom portion 120 are inserted into the pair of through holes 621, respectively. In other words, the pair of guide portions 121 are exposed upward through the pair of through holes 621.

[0084] (2.4) Mounting parts As shown in FIGS. 1 to 3 and 9, the mounting member 8 has a fixing plate portion 81 and a pair of grip portions 82.

[0085] The fixing plate portion 81 is a plate-shaped portion extending in the front-to-rear direction. In this embodiment, the lighting fixture 1 is embedded in the ceiling so that the fixing plate portion 81 is parallel to the horizontal plane. Note that "parallel" in this disclosure refers to two elements being strictly parallel, as well as an angle between the two elements being within a range of about several degrees (for example, less than 5 degrees).

[0086] A terminal block 7 is fixed to the underside of the rear end of the fixing plate 81. A cover member 6 accommodating the power supply socket 1 and the light source unit 2 is fixed to the underside of the front end of the fixing plate 81.

[0087] An upwardly recessed wiring portion 810 is formed at the front end of the fixed plate portion 81. When viewed from above in the vertical direction, the wiring portion 810 is formed in an elliptical shape with the longitudinal direction extending in the front-to-rear direction.

[0088] 3 and 9, a wiring space Sp2 is formed below the wiring portion 810. When the cover member 6 accommodating the power feed socket 1 and the light source unit 2 is fixed to the lower surface of the fixing plate portion 81, a pair of electric wires W1 extending from the terminal block 7 are wired in the wiring space Sp2. In this state, a pair of guide portions 121 exposed upward through a pair of through-holes 621 provided in the cover member 6 are also disposed in the wiring space Sp2.

[0089] As described above, guide portion 121 has downwardly recessed recess 1213. This reduces the possibility that the peripheral edge of wiring portion 810, which is oval in plan view from the top-bottom direction, will come into contact with guide portion 121.

[0090] The pair of gripping portions 82 are plate-shaped portions extending downward from both ends in the left-right direction of the front end of the fixing plate portion 81. The pair of gripping portions 82 clamp the lower end portion of the cover member 6.

[0091] (3) Light source unit installation procedure The procedure for attaching the light source unit 2 to the power supply socket 1 will be described below.

[0092] First, a worker (hereinafter referred to as the worker) who intends to attach the light source unit 2 to the power supply socket 1 inserts a pair of power supply terminals 21 of the light source unit 2 upward into a pair of first insertion holes H1 of the power supply socket 1, as shown in Figure 6.

[0093] The pair of power supply terminals 21 are inserted upward into the pair of first insertion holes H1, and at the same time, the protrusions 22 of the light source unit 2 are inserted upward into the second insertion holes H2 of the power supply socket 1. At this time, the pair of protrusions 24 are inserted upward into the pair of grooves 113. Here, the width of the protrusions 24 becomes narrower towards the tip, so that the pair of protrusions 24 can be easily inserted into the pair of grooves 113.

[0094] With the pair of power supply terminals 21, the protrusion 22, and the pair of projections 24 inserted into the pair of first insertion holes H1, the pair of second insertion holes H2, and the pair of grooves 113, respectively, the worker pushes the light source unit 2 upward until the mounting plate 202 of the light source unit 2 comes into contact with the bottom 110 of the power supply socket 1. With the mounting plate 202 and the bottom 110 in contact, the projections 24 are positioned above the restricting portion 114.

[0095] With the mounting plate portion 202 and the bottom portion 110 in contact with each other, the worker rotates the light source unit 2 around the vertical axis. Specifically, the worker rotates the light source unit 2 clockwise when viewed from below and counterclockwise when viewed from above.

[0096] By rotating the light source unit 2, the pair of power supply terminals 21 move counterclockwise as viewed from above along the pair of guide holes H3. At this time, the large diameter portion 212 of the power supply terminal 21 moves along the spring piece 142 of the spring portion 14. The worker rotates the light source unit 2 against the elastic force that the spring piece 142 applies to the large diameter portion 212.

[0097] Furthermore, by rotating the light source unit 2, the protrusion 22 moves counterclockwise as viewed from above. Accordingly, each of the pair of protrusions 24 protruding from the protrusion 22 enters a pair of gaps G1 (see FIG. 8) from the pair of grooves 113. Furthermore, each of the pair of protrusions 24 moves counterclockwise as viewed from above while in contact with a pair of restricting portions 114 in the pair of gaps G1. Here, the pair of restricting portions 114 restrict downward movement of the protrusion 22.

[0098] When the worker further rotates the light source unit 2 and the pair of power supply terminals 21 moves further along the pair of guide holes H3, the large diameter portion 212 is clamped between the terminal contact piece 133 and the spring piece 142, as shown in Fig. 7. This electrically connects the pair of power supply terminals 21 and the pair of conductive parts 13, completing the attachment of the light source unit 2 to the power supply socket 1.

[0099] (4) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0100] In the above embodiment, as shown in Fig. 8, the length of the restricting portion 114 in the first direction is constant. However, the length of at least a part of the restricting portion 114 in the first direction may be shorter as it approaches the groove portion 113. For example, as shown in Fig. 10, the length in the first direction (vertical direction) of a portion of the restricting portion 114 (114A) in the vicinity of the groove portion 113 in a modified example is shorter as it approaches the groove portion 113. In other words, the length in the vertical direction of the gap G1 between the restricting portion 114A and the bottom portion 120 of the second main body 12 is longer as it approaches the groove portion 113. This makes it easier for each of the pair of protrusions 24 protruding from the protruding portion 22 to enter the pair of gaps G1 from the pair of grooves 113 when the light source unit 2 is rotated.

[0101] The shape of the pair of first insertion holes H1 is not limited to a circular shape, but may be a polygonal shape, for example, the shape of the first insertion holes H1 may be a square shape.

[0102] (5) Summary As described above, the power feed socket (1) of the first aspect includes a conductive portion (13) electrically connected to the power feed terminal (21) of the light source unit (2), and a main body (10) that houses the conductive portion (13). The main body (10) has a first plate portion (110) and a second plate portion (120) that face each other. The first plate portion (110) is provided with a terminal insertion hole (H1) and a guide hole (H3). The terminal insertion hole (H1) is a hole into which the power feed terminal (21) is inserted in a first direction. The guide hole (H3) is connected to the terminal insertion hole (H1) and is a hole that guides the power feed terminal (21) inserted into the terminal insertion hole (H1) to a connection position where the power feed terminal (21) is electrically connected to the conductive portion (13). The second plate portion 120 is provided with a wire insertion hole H4 into which an electric wire W1 for supplying power to the conductive portion 13 is inserted in a second direction opposite to the first direction. The wire insertion hole H4 is provided at a position that does not overlap with the terminal insertion hole H1 and the guide hole H3 in a plan view from a direction including the first direction and the second direction.

[0103] According to this aspect, the electric wire W1 inserted into the electric wire insertion hole H4 extends along one direction including the first direction and the second direction within the power feed socket 1. Therefore, in order to route the electric wire W1, it is not necessary to expand the internal space Sp1 of the power feed socket 1 in a direction (second direction) intersecting the one direction (first direction) including the first direction and the second direction, and the power feed socket 1 can be made smaller in size in the second direction.

[0104] In the power feed socket (1) of the second aspect, in the first aspect, the wire insertion hole (H4) is provided on the opposite side of the guide hole (H3) from the terminal insertion hole (H1) in a plan view from the first direction.

[0105] According to this aspect, the wire insertion hole (H4) can be positioned so as to overlap the conductive portion (13) when viewed in a plane from one direction, thereby preventing the path taken by the wire (W1) inserted into the wire insertion hole (H4) until it is connected to the conductive portion (13) from becoming too long.

[0106] In the power supply socket (1) of the third aspect, in the first or second aspect, the main body (10) further includes a holding portion (1100) that protrudes from one surface (S1) of the first plate portion (110) on the first orientation side and holds the conductive portion (13). The holding portion (1100) has an insertion hole (B1) into which the electric wire (W1) inserted in the second orientation into the electric wire insertion hole (H4) is inserted.

[0107] According to this aspect, the holding portion (1100) can insulate the electric wire (W1) inserted into the internal space (Sp1) from the electric wire insertion hole (H4) from the outside.

[0108] In the fourth aspect of the power supply socket (1), in the third aspect, the bottom surface (S3) of the insertion hole (B1) is located between the first surface (S1), which is one surface (S1) of the first plate portion (110), and the second surface (S2) opposite the first surface (S1) of the first plate portion (110).

[0109] According to this aspect, it is possible to ensure the insertion length of the wire (W1) in the insertion hole (B1) while preventing the length of the main body (10) in the first direction from increasing.

[0110] In the power socket (1) of the fifth aspect, in any one of the first to fourth aspects, the guide hole (H3) has an arc shape when viewed from the first direction, and the wire insertion hole (H4) is provided on an extension of the arc shape when viewed from the first direction.

[0111] According to this embodiment, by moving the power supply terminal (21) along the guide hole (H3), the conductive portion (13) to which the electric wire (W1) is connected through the electric wire insertion hole (H4) can be electrically connected to the power supply terminal (21).

[0112] In the sixth aspect of the power supply socket (1), in the third or fourth aspect, the holding portion (1100) holds the conductive portion (13) so as to restrict movement of the conductive portion (13) when the power supply terminal (21) is electrically connected to the conductive portion (13).

[0113] According to this aspect, when the power supply terminal (21) is moved along the guide hole (H3) to connect to the conductive part (13), movement of the conductive part (13) due to being pressed by the power supply terminal (21) can be suppressed.

[0114] In the seventh aspect of the power feed socket (1), in any one of the first to sixth aspects, the main body (10) further includes a guide portion (121) protruding from a surface (S4) on the first-facing side of the second plate portion (120). The guide portion (121) guides the electric wire (W1) inserted in the second direction into the electric wire insertion hole (H4).

[0115] According to this embodiment, the electric wire (W1) can be reliably inserted into the electric wire insertion hole (H4).

[0116] In the power supply socket (1) of the eighth aspect, the guide portion (121) of the seventh aspect is made of an insulating material.

[0117] According to this embodiment, the guide portion (121) can insulate the portion of the electric wire (W1) inserted into the internal space (Sp1) from the outside.

[0118] In the power supply socket (1) of the ninth aspect, in the seventh and eighth aspects, the guide portion (121) has a recessed portion (1213) recessed in the second direction.

[0119] According to this embodiment, the possibility of the attachment member (8) coming into contact with the guide portion (121) can be reduced.

[0120] A lighting device (100) of a tenth aspect includes the power supply socket (1) of any one of the first to ninth aspects and a light source unit (2).

[0121] According to this aspect, the electric wire (W1) inserted into the electric wire insertion hole (H4) extends along one direction including the first direction and the second direction within the power feeding socket (1). Therefore, in order to route the electric wire (W1), it is not necessary to expand the internal space (Sp1) of the power feeding socket (1) in a direction (second direction) intersecting the one direction including the first direction and the second direction (first direction), and the lighting device (100) can be made smaller in size in the second direction. [Explanation of symbols]

[0122] 1 power socket 2 Light source unit 8 Mounting material 10 Main Unit 13 Conductive part 21 Power supply terminal 100 lighting equipment 110 1st plate part 120 2nd plate part 121 Guide part 1100 Holding part 1213 recess B1 Insertion hole H1 terminal insertion hole H3 guide hole H4 wire insertion hole S1 1st page S2 side 2 S3 bottom S4 side Sp1 Internal space W1 electric wire

Claims

1. a conductive portion electrically connected to a power supply terminal of the light source unit; a main body that accommodates the conductive portion, The main body has a first plate portion and a second plate portion facing each other, The first plate portion has a terminal insertion hole into which the power supply terminal is inserted in a first orientation; a guide hole connected to the terminal insertion hole, for guiding the power supply terminal inserted into the terminal insertion hole to a connection position where the power supply terminal is electrically connected to the conductive portion, the second plate portion is provided with a wire insertion hole into which an electric wire for supplying power to the conductive portion is inserted in a second direction opposite to the first direction, the wire insertion hole is provided at a position not overlapping with the terminal insertion hole and the guide hole in a plan view from one direction including the first direction and the second direction; Power supply socket.

2. the wire insertion hole is provided on the opposite side of the guide hole from the terminal insertion hole in a plan view from the one direction; The power supply socket according to claim 1.

3. the main body further includes a holding portion that protrudes from one surface of the first plate portion facing the first direction and holds the conductive portion; the holding portion has an insertion hole into which the electric wire inserted in the electric wire insertion hole in the second direction is inserted, The power supply socket according to claim 1 or 2.

4. a bottom surface of the insertion hole is located between a first surface which is the one surface of the first plate portion and a second surface which is opposite to the first surface of the first plate portion; The power supply socket according to claim 3.

5. the guide hole has an arc shape in a plan view from the one direction, The wire insertion hole is provided on an extension line of the arc shape in a plan view from the one direction. The power supply socket according to claim 1 or 2.

6. the holding portion holds the conductive portion so as to restrict movement of the conductive portion when the power supply terminal is electrically connected to the conductive portion. The power supply socket according to claim 3.

7. the main body further includes a guide portion protruding from one surface of the second plate portion facing the first direction, The guide portion guides the electric wire inserted in the second direction into the electric wire insertion hole. The power supply socket according to claim 1 or 2.

8. The guide portion is formed of an insulating material. The power supply socket according to claim 7.

9. The guide portion has a recessed portion recessed in the second direction. The power supply socket according to claim 7.

10. The power supply socket according to claim 1 or 2; The light source unit, Lighting equipment.

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