Power supply socket and illuminating device

Abstract

To establish compatibility between downsizing and safety.SOLUTION: A power supply socket 1 supplies power to a light source unit comprising a protruding part. The power supply socket 1 comprises a first case 11, a second case 12, and a lid part 1201. The first case 11 comprises an insertion hole (second insertion hole H2) into which the protruding part of the light source is inserted. The first case 11 is attached to the second case 12. The lid part 1201 overlaps with the insertion hole in a planar view from the insertion direction when the first case 11 is attached to the second case 12.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Patent Document 1 describes a socket having an insertion hole into which a base 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] The socket (power supply socket) described in Patent Document 1 allows the lamp unit (light source unit) to have its base (protrusion) housed inside the socket, thereby enabling the downsizing of the lighting device. However, in the socket before the lamp unit is attached, there is a possibility that the user may come into contact with the charging part through the insertion hole. In other words, it may be difficult to achieve both downsizing and safety with the socket described in Patent Document 1.

[0005] An object of the present disclosure is to provide a power socket and a lighting device that can achieve both miniaturization and safety. [Means for solving the problem]

[0006] A power feed socket according to one aspect of the present disclosure is a power feed socket that supplies power to a light source unit having a protrusion. The power feed socket includes a first housing, a second housing, and a lid. The first housing has an insertion hole into which the protrusion of the light source unit is inserted. The first housing is attached to the second housing. When the first housing is attached to the second housing, the lid overlaps with the insertion hole in a plan view from the insertion direction. The insertion direction is the direction in which the protrusion is inserted into the insertion hole.

[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 power supply socket and lighting device according to one aspect of the present disclosure, it is possible to achieve both miniaturization and safety. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a lighting device according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the lighting device. [Figure 3] FIG. 3 is another exploded perspective view of the lighting device. [Figure 4] FIG. 4 is an exploded perspective view of the power supply socket according to the embodiment. [Figure 5] FIG. 5 is a plan view of the power supply socket. [Figure 6] FIG. 6 is a plan view of the power supply socket with the second housing removed. [Figure 7] FIG. 7 is another plan view of the power supply socket with the second housing removed. [Figure 8] FIG. 8 is a cross-sectional view of the power supply socket. [Figure 9] FIG. 9 is a cross-sectional view of the power supply socket of the same as above, with a light source unit attached thereto. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a power supply socket and a lighting device according to an embodiment will be described with reference to the drawings. The drawings referred to in the following embodiments are schematic diagrams, and the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensions, and the size and thickness ratios between the components do not necessarily reflect the actual dimensional ratios.

[0011] (Embodiment) (1) Overview First, an outline of a power socket 1 and a lighting device 100 according to an embodiment will be described with reference to FIGS.

[0012] The lighting device 100 according to the embodiment is, for example, a downlight that is embedded in the ceiling of a facility and emits light vertically downward. The facility may be, for example, a residential facility such as a detached house or an individual unit in an apartment building, or a non-residential facility such as a factory, a store, an office building, a commercial building, a hospital, or a school. In this embodiment, as an example, the facility is a detached house.

[0013] 1 to 3, the lighting device 100 according to the embodiment includes a power feed socket 1 and a light source unit 2. The lighting device 100 further includes a cover member 6, a terminal block 7, and an attachment member 8. The light source unit 2 is detachably attached to the power feed socket 1.

[0014] The power feeding socket 1 supplies power to the light source unit 2 having a protrusion 22 (see FIG. 2). As shown in FIG. 4, the power feeding socket 1 includes a first housing 11, a second housing 12, and a lid 1201. The first housing 11 has a second insertion hole H2 (insertion hole) into which the protrusion 22 of the light source unit 2 is inserted. The first housing 11 is attached to the second housing 12. When the first housing 11 is attached to the second housing 12, the lid 1201 overlaps with the second insertion hole H2 in a plan view from the insertion direction. The insertion direction is the direction in which the protrusion 22 is inserted into the second insertion hole H2. In this embodiment, as an example, the insertion direction is a direction along the vertical direction, which is the vertical direction in FIG. 2.

[0015] In the power feeding socket 1 according to the embodiment, when the light source unit 2 is attached to the power feeding socket 1, the protrusion 22 of the light source unit 2 is received in the housing 10 of the power feeding socket 1 through the second insertion hole H2. This allows the lighting device 100 to be made smaller (thinner). Furthermore, in the power feeding socket 1, the second insertion hole H2 provided in the first housing 11 is covered by the lid 1201. This prevents the user from touching the charging unit. In other words, the power feeding socket 1 according to the embodiment allows for both miniaturization and safety.

[0016] (2) Details Next, components of the power socket 1 and the lighting device 100 according to the embodiment will be described with reference to FIGS.

[0017] In the following description, unless otherwise specified, the front-rear direction, left-right direction, and up-down direction (vertical direction) indicated by arrows in Figures 1 to 3 are defined as the front-rear direction, left-right direction, and up-down direction of the lighting device 100 and its components, respectively. 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 "up," "down," "left," "right," "front," and "back" in Figures 1 to 3 are merely shown for the purpose of explanation and do not have any physical substance.

[0018] As described above, the lighting device 100 according to the embodiment is, for example, a downlight that is recessed into the ceiling of a facility and emits light vertically downward. As shown in FIGS. 1 to 3 , the lighting device 100 according to the embodiment includes a power socket 1 and a light source unit 2. The lighting device 100 further includes a cover member 6, a terminal block 7, and an attachment member 8.

[0019] (2.1) Power socket The power feed socket 1 is a device that supplies power to the light source unit 2. As shown in FIGS. 2 to 4, the power feed socket 1 includes a housing 10. As shown in FIG. 4, the housing 10 includes a first housing 11 and a second housing 12. The housing 10 is configured by combining the first housing 11 and the second housing 12 in one direction (the up-down direction). That is, the power feed socket 1 according to the embodiment includes the first housing 11 and the second housing 12.

[0020] 4, 6, and 7, the power feed socket 1 further includes 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 (see FIG. 8) of the housing 10. Note that FIGS. 6 and 7 are plan views of the power feed socket 1 and the light source unit 2 when the second housing 12 is removed from the power feed socket 1 with the light source unit 2 attached.

[0021] The first housing 11 is formed of an insulating material such as synthetic resin. The first housing 11 is, for example, cylindrical with one surface (top surface) open. As shown in FIGS. 4, 6, and 7, the first housing 11 has a bottom 110, an inner wall 111, and an outer wall 115.

[0022] The bottom portion 110 is formed, for example, in a disk shape. As shown in Figures 6 and 8, the bottom portion 110 has a first surface S1 and a second surface S2 that face each other in the up-down direction. In this embodiment, the first surface S1 is the upper surface of the bottom portion 110, and the second surface S2 is the lower surface of the bottom portion 110. As shown in Figures 6 and 7, the bottom portion 110 is provided with a pair of first insertion holes H1, a pair of guide holes H3, and a second insertion hole H2.

[0023] Each of the pair of first insertion holes H1 is a circular through-hole that penetrates the bottom 110 in the thickness direction (vertical direction) of the bottom 110. The diameter of each first insertion hole H1 is larger than the diameter of a large-diameter portion 212 of a power supply terminal 21, which will be described later (see FIGS. 6 and 7). The pair of first insertion holes H1 are provided at positions that are point-symmetrical with respect to the center C1 of the bottom 110. In each of the pair of first insertion holes H1, a corresponding one of the pair of power supply terminals 21 is inserted facing upward.

[0024] Each of the pair of guide holes H3 is a through-hole that penetrates the bottom portion 110 in the thickness direction (vertical direction) of the bottom portion 110. In a plan view from the vertical direction, each guide hole H3 is formed in an arc shape centered on the center C1 of the bottom portion 110. The pair of guide holes H3 are provided at positions that are point-symmetric with respect to the center C1 of the bottom portion 110. Here, each of the pair of guide holes H3 is connected to the corresponding one of the pair of first insertion holes H1. More specifically, each guide hole H3 extends from the corresponding first insertion hole H1 along a circular path centered on the center C1 of the bottom portion 110. The width of each guide hole H3 (the length 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 (see FIGS. 6 and 7). With this, with the corresponding large diameter portion 212 of the pair of large diameter portions 212 inserted into each of the pair of first insertion holes H1, the light source unit 2 can be rotated about the center C1 of the bottom portion 110 to move each power supply terminal 21 along each guide hole H3. At this time, because the width of the guide hole H3 is smaller than the diameter of the large diameter portion 212 of the power supply terminal 21, downward movement of the light source unit 2 is restricted.

[0025] 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.

[0026] The second insertion hole H2 is a circular through-hole that penetrates the bottom 110 in the thickness direction (vertical direction) of the bottom 110. The second insertion hole H2 is provided between the pair of first insertion holes H1 in the radial direction of the bottom 110. The second insertion hole H2 is provided at a position where the center of the second insertion hole H2 coincides with the center C1 of the bottom 110. The diameter of the second insertion hole H2 is larger than the diameter of a protrusion 22 (described later) of the light source unit 2. When the pair of power supply terminals 21 are inserted into the pair of first insertion holes H1, the protrusion 22 is inserted upward into the second insertion hole H2. That is, in the power supply socket 1 according to the embodiment, the first housing 11 has the second insertion hole H2 (insertion hole) into which the protrusion 22 of the light source unit 2 is inserted. In this embodiment, the second insertion hole H2 corresponds to the insertion hole into which the protrusion 22 is inserted.

[0027] 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.

[0028] The pair of guide walls 112 extend upward from a peripheral edge H20 (see FIG. 6) of the second insertion hole H2. The pair of guide walls 112 are provided at positions point-symmetrical with respect to the center C1 of the bottom 110. The pair of guide walls 112 guide the protrusion 22 inserted upward through the second insertion hole H2. As shown in FIG. 8, when the first housing 11 and the second housing 12 are combined, the tips of the guide walls 112 face the bottom 120 of the second housing 12 with a small gap between them. That is, in the power feed socket 1 according to the embodiment, the first housing 11 further has a guide wall 112 (first side wall) that protrudes from the opening edge (peripheral edge H20) of the second insertion hole H2 toward the second housing 12 (upper side).

[0029] 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 vertical direction. The pair of grooves 113 are grooves extending in the vertical direction. The pair of grooves 113 are provided at positions that are point-symmetric with respect to the center C1 of the bottom portion 110.

[0030] When the protrusion 22 is inserted upward into the second insertion hole H2, a pair of protrusions 24 (described below) that protrude in opposite directions from the side surfaces of the protrusion 22 are inserted into the pair of grooves 113, as shown in Figure 6.

[0031] 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.

[0032] As shown in FIG. 8 , the pair of restricting portions 114 are adjacent to the pair of groove portions 113 in the circumferential direction around the center C1. The pair of restricting portions 114 are provided at positions that are point-symmetric with respect to the center 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 112 in the vertical direction. As a result, when the first housing 11 and the second housing 12 are combined, a gap G1 that is continuous with the groove portions 113 is formed between the restricting portions 114 and the bottom portion 120 of the second housing 12. In other words, a pair of gaps G1 are formed in the housing 10. The protrusions 24 inserted into the groove portions 113 move in contact with the restricting portions 114 in the gap G1 by rotating the light source unit 2 around the center C1 of the bottom portion 110.

[0033] 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 downward movement of the protrusions 22.

[0034] The outer wall 115 extends upward from the entire periphery of the outer periphery of the bottom 110 .

[0035] The bottom 110, the inner wall 111, the outer wall 115, and the bottom 120 of the second housing 12 define an internal space Sp1 in which a pair of conductive parts 13 and a pair of spring parts 14 are housed.

[0036] 8, the first housing 11 has a pair of holding portions 1100 that protrude from the first surface S1 on the upper side of the bottom portion 110. The pair of holding portions 1100 hold the pair of conductive portions 13, respectively.

[0037] As shown in FIG. 6, the holding portion 1100 has a fixing groove 1101 that extends downward. A fixing piece 131 of the conductive portion 13 is inserted into the fixing groove 1101. As shown in FIG. 8, the holding portion 1100 further 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, which 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, is inserted into the insertion hole B1. The electric wire W1 is inserted into the insertion hole B1 until the tip of the electric wire W1 contacts the bottom surface 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 of the insertion hole B1.

[0038] The second housing 12 is formed of an insulating material such as synthetic resin. The second housing 12 is, for example, cylindrical and has an opening OP1 on one surface (bottom surface). The first housing 11 is attached to the second housing 12 so as to close the opening OP1. As shown in FIGS. 4 and 8, the second housing 12 includes a bottom portion 120, a pair of guide portions 121, and an outer wall portion 122.

[0039] The bottom 120 is formed, for example, in a disk shape. The bottom 120 has a first surface S3 and a second surface S4 that face each other in the up-down direction. In this embodiment, the first surface S3 is the lower surface of the bottom 120, and the second surface S4 is the upper surface of the bottom 120. When the first housing 11 and the second housing 12 are combined, the bottom 120 faces the bottom 110 of the first housing 11 in the up-down direction, with the internal space Sp1 between them.

[0040] The bottom 120 is provided with a pair of wire insertion holes H4. One of the pair of wires W1 drawn from the terminal block 7 is inserted downward into each of the pair of wire insertion holes H4. The pair of wires W1 inserted into the pair of wire insertion holes H4 extends 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 the up-down direction (e.g., the left-right direction) to route the wires W1, and the power feed socket 1 and the lighting device 100 can be made smaller in the direction intersecting the up-down direction.

[0041] As shown in FIG. 5 , each of the pair of wire insertion holes 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, each 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. Here, the guide hole H3 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. In other words, each 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. As a result, each wire insertion hole H4 is positioned so as to overlap with the conductive portion 13 in a top-bottom plan view. This shortens the path that the wire W1 inserted into each wire insertion hole H4 takes to be connected to the conductive portion 13. Furthermore, the vertical length of the conductive portion 13 can be shortened, or the shape of the conductive portion 13 can be simplified.

[0042] In addition, each wire insertion hole H4 is located on an arc-shaped extension of the corresponding guide hole H3 in a top-bottom plan view. More specifically, each wire insertion hole H4 is located on an imaginary circle CL1 that includes an extension of the corresponding guide hole H3. 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.

[0043] The bottom 120 is also provided with an inner wall 124 (see FIG. 8 ). The inner wall 124 protrudes downward from the first surface S3 of the bottom 120. More specifically, the inner wall 124 protrudes downward from the outer edge of the lid 1201. The inner wall 124 is formed in an annular shape when viewed from above in the vertical direction. That is, in the power supply socket 1 according to the embodiment, the second housing 12 further has an inner wall 124 (second side wall) protruding from the outer edge of the lid 1201 toward the first housing 11 (downward). When the first housing 11 is attached to the second housing 12, the guide wall 112 (first side wall) and the inner wall 124 (second side wall) overlap in the vertical direction (insertion direction) (see FIG. 8 ). This makes it possible to prevent foreign matter from entering the housing 10.

[0044] The pair of electric wires W1 inserted into 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.

[0045] The pair of guide portions 121 protrude upward from the upper second surface S4 of the bottom portion 120. Each of the pair of guide portions 121 has an electric wire guide portion 1211 and a reinforcing portion 1212, as shown in FIG.

[0046] 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. Furthermore, the wire W1 can be reliably connected to the conductive portion 13.

[0047] Furthermore, as described above, the guide portion 121 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, the insulation between the portion of the electric wire W1 inserted into the internal space Sp1 and the outside is realized by the guide portion 121 protruding upward from the second surface S4 of the bottom portion 120, and it is possible to prevent the dimension of the entire second housing 12 from increasing in the vertical direction. As a result, it is possible to prevent the dimension of the lighting device 100 from increasing in the vertical direction.

[0048] Reinforcing portion 1212 is a rail-shaped portion extending from wire guide portion 1211 above bottom portion 120. At the tip of reinforcing portion 1212, as shown in FIG.

[0049] Outer wall portion 122 extends downward from the entire periphery of the outer edge portion of bottom portion 120. Outer wall portion 122 is disposed inside outer wall portion 115 of first housing 11 when first housing 11 and second housing 12 are combined together (see FIG. 8).

[0050] Here, as shown in FIG. 4, the power feed socket 1 according to the embodiment includes a lid 1201. The lid 1201 is a part of the bottom 120 of the second housing 12. More specifically, as shown in FIGS. 4 and 5, the lid 1201 is a circular portion surrounded by a two-dot chain line and is provided at the center of the bottom 120. The outer diameter of the lid 1201 is slightly larger than the diameter (opening diameter) of the second insertion hole H2 provided in the first housing 11. Therefore, when the first housing 11 is attached to the second housing 12, the second insertion hole H2 is blocked by the lid 1201 in the up-down direction. This makes it possible to prevent a user from touching the charging portion of the power feed socket 1 before the light source unit 2 is attached.

[0051] That is, the power feed socket 1 according to the embodiment includes a lid 1201 that overlaps with the second insertion hole H2 in a plan view from the insertion direction when the first housing 11 is attached to the second housing 12. Furthermore, in the power feed socket 1 according to the embodiment, the lid 1201 is part of a portion (bottom 120) of the second housing 12 that faces the second insertion hole H2 of the first housing 11. The insertion direction is the direction in which the protrusion 22 of the light source unit 2 is inserted into the second insertion hole H2 of the first housing 11, which is the up-and-down direction in this embodiment.

[0052] 4, the cover 1201 has a through-hole 123 that penetrates the bottom 120 in the thickness direction (vertical direction) of the bottom 120. By providing the through-hole 123, it becomes possible to adjust the internal pressure of the housing 10.

[0053] Each of the pair of conductive parts 13 is formed of, for example, a plate-shaped metal member. The pair of conductive parts 13 are provided at positions that are point-symmetric with respect to the center C1 of the bottom part 110 of the first housing 11, as shown in Figs. 6 and 7 .

[0054] Each of the pair of conductive parts 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.

[0055] The fixing pieces 131 are formed, for example, in a flat plate shape. The fixing pieces 131 are inserted downward into the fixing grooves 1101 of the holding part 1100. This fixes the conductive parts 13 to the first housing 11. Here, each conductive part 13 is fixed to a position in the first housing 11 adjacent to the end of the corresponding guide hole H3 on the opposite side from the first insertion hole H1 side.

[0056] The terminal contact piece 133 protrudes toward the guide hole H3 from one end (the lower end in this embodiment) of the fixed piece 131 fixed to the first housing 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 fixed piece 131 is inserted into the fixing groove 1101 of the holding part 1100, and the conductive portion 13 is fixed to the first housing 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 to connect to the conductive portion 13, due to the conductive portion 13 being pressed by the power supply terminal 21.

[0057] The insertion piece 132 protrudes from the other end (upper end in this embodiment) of the fixed piece 131 toward the opposite side to the guide hole H3. The electric wire W1 inserted through the electric wire insertion hole H4 is clamped between the insertion piece 132 and the fixed piece 131. As a result, 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. As a result, commercial power is input from an external power source to the pair of conductive portions 13 via the pair of electric wires W1 inserted through the pair of electric wire insertion holes H4.

[0058] The pair of spring parts 14 are formed of, for example, a plate-shaped metal member. The pair of spring parts 14 are provided at positions that are point-symmetric with respect to the center C1 of the bottom part 110 of the first housing 11.

[0059] Each of the pair of spring portions 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.

[0060] The fixed end piece 141 is, for example, a plate-like member formed in a hook shape. The fixed end piece 141 is fixed to the first housing 11 by being hooked onto a column-like portion 1102 provided on the bottom portion 110 of the first housing 11.

[0061] The free end piece 143 is formed, for example, in a flat plate shape. The free end piece 143 is inserted into a holding groove 1103 provided in the bottom 110 of the first housing 11. The free end piece 143 is held in the holding groove 1103 in a state in which it can move along the holding groove 1103.

[0062] The spring piece 142 is, for example, a V-shaped plate member that connects the fixed end piece 141 and the free end piece 143. The spring piece 142 protrudes outward from the center C1 of the bottom part 110 of the first housing 11. The apex of the spring piece 142 overlaps with the guide hole H3 in a plan view from the top-bottom direction.

[0063] (2.2) 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 that electrically connect the terminal block 7 to the power feed socket 1. The commercial power input to the power feed socket 1 is supplied to the light source unit 2 attached to the power feed socket 1.

[0064] 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).

[0065] The main body 20 is formed in a cylindrical shape from an insulating material such as synthetic resin.

[0066] An opening 201 is provided at one end (lower end) in the axial direction (vertical direction) of the main body 20. In the opening 201, a lens 23 is fitted.

[0067] The light source unit is housed inside the main body 20. The light source unit has, for example, 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.

[0068] Light emitted from the light source unit (light-emitting element) is emitted to the outside through lens 23. Here, lens 23 is arranged so that the optical axis of the light emitted from the light source unit through lens 23 coincides with the central axis of main body unit 20.

[0069] The main body 20 has an attachment portion 202 at the other end (upper end) opposite to the opening 201. The attachment portion 202 is one surface of the main body 20 opposite to the opening 201. The attachment portion 202 has a circular shape when viewed in a plan view from the top-bottom direction.

[0070] The mounting portion 202 is provided with a pair of through holes 203 that penetrate the mounting portion 202 in the thickness direction (vertical direction) of the mounting portion 202. The pair of through holes 203 are provided at positions that are point-symmetric with respect to the central axis of the main body 20. A corresponding one of a pair of power supply terminals 21 electrically connected to the light source unit is inserted into each of the pair of through holes 203. In other words, the pair of power supply terminals 21 are provided at positions that are point-symmetric with respect to the center of the mounting portion 202.

[0071] The pair of power supply terminals 21 are provided so as to protrude outward (upward) from the mounting 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.

[0072] As shown in FIGS. 6 and 7, each of the pair of power supply terminals 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 attachment 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. 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, the light source unit 2 is electrically and mechanically connected to the power supply socket 1.

[0073] The protrusion 22 protrudes outward (upward) from the mounting portion 202. The protrusion 22 is inserted into the second insertion hole H2 of the power supply socket 1. The protrusion 22 is formed in a cylindrical shape. The protrusion 22 is provided at a position where the central axis of the protrusion 22 coincides with the central axis of the main body 20. The protrusion 22 functions as an accommodation space that accommodates the electronic component E1 (see FIG. 9) that constitutes the above-mentioned light-emitting circuit. The electronic component E1 accommodated in the protrusion 22 is, for example, an electrolytic capacitor that constitutes the above-mentioned light-emitting circuit.

[0074] 6 and 7, the protrusion 22 has a pair of protrusions 24. The pair of protrusions 24 are aligned in the radial direction of the protrusion 22. More specifically, the pair of protrusions 24 protrude in opposite directions from the side surfaces of the protrusion 22 and are provided at positions that are point-symmetrical with respect to the center of the protrusion 22.

[0075] 6 and 7, the width of at least one of the pair of protrusions 24 narrows (becomes thinner) 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.

[0076] Furthermore, the pair of protrusions 24 are provided at positions where a line segment connecting the centers of the pair of protrusions 24 and a line segment connecting the centers of the pair of power supply terminals 21 intersect at right angles. In this specification, "perpendicular" 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 distributes the support points of the light source units 2 on the power supply socket 1 evenly, enabling the power supply socket 1 to hold the light source units 2 evenly.

[0077] 6 and 7, the protruding portion 22 has a plurality of adjustment holes 222 (two in the illustrated example). Each of the plurality of adjustment holes 222 penetrates the bottom portion 220 of the protruding portion 22 along the thickness direction (vertical direction) of the bottom portion 220. With the plurality of adjustment holes 222, even if a problem occurs in which gas is generated from an electrolytic capacitor serving as the electronic component E1, for example, the generated gas can be released to the outside through the plurality of adjustment holes 222, making it possible to adjust the internal pressure of the protruding portion 22. Furthermore, the gas released from the protruding portion 22 through the plurality of adjustment holes 222 is released to the outside through a through-hole 123 provided in the bottom portion 120 of the second housing 12. That is, the protruding portion 22 has the adjustment holes 222 for adjusting the internal pressure of the protruding portion 22.

[0078] 9, when the light source unit 2 is attached to the power feed socket 1, a gap G2 is provided between a first surface S3 of the bottom 120 of the second housing 12 of the power feed socket 1 and one surface (upper surface) S5 of the bottom 220 of the protrusion 22 of the light source unit 2. This improves the attachability of the light source unit 2 to the power feed socket 1. That is, in the power feed socket 1 according to the embodiment, when the light source unit 2 is attached to the power feed socket 1, a gap G2 is provided between one surface S5 (surface) of the protrusion 22 that faces the lid 1201 and a first surface S3 (surface) of the lid 1201 that faces the protrusion 22.

[0079] (2.3) Cover member The cover member 6 is formed into a cylindrical shape and is 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] As shown in Fig. 3, an opening 61 is provided at one end (lower end) in the axial direction (vertical direction) of the cover member 6. Also, as shown in Fig. 2, the cover member 6 has an attachment portion 62 at the other end (upper end) in the axial direction.

[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 (bottom side).

[0082] The mounting portion 62 has a pair of through holes 621. Each of the pair of through holes 621 penetrates the mounting portion 62 along the thickness direction of the mounting portion 62.

[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 second housing 12 of the power feed socket 1 comes into contact with the attachment portion 62 from below. At this time, a pair of guide portions 121 protruding from the second 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, the mounting member 8 has a fixing portion 81 and a pair of gripping portions 82.

[0085] The fixing portion 81 is formed in a plate shape extending in the front-rear direction. In this embodiment, the lighting device 100 is embedded in the ceiling so that the fixing portion 81 is parallel to the horizontal plane. In this specification, "parallel" refers not only to the case where two elements are strictly parallel, but also to the case where the angle between the two elements is 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 fixed portion 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 fixed portion 81.

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

[0088] 3, a wiring space Sp2 is formed below the wiring portion 810. When the cover member 6 accommodating the power supply socket 1 and the light source unit 2 is fixed to the lower surface of the fixing 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] The pair of gripping portions 82 are formed in the shape of plates extending downward from both ends in the left-right direction of the front end of the fixing portion 81. The pair of gripping portions 82 clamp the lower end portion of the cover member 6.

[0090] (3) Light source unit installation procedure Next, a procedure for attaching the light source unit 2 to the power socket 1 will be described.

[0091] 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.

[0092] The pair of power supply terminals 21 are inserted upward into the pair of first insertion holes H1, and at the same time, the protrusion 22 of the light source unit 2 is inserted upward into the second insertion hole 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 each protrusion 24 becomes narrower (thinner) as it approaches the tip, which has the advantage that the pair of protrusions 24 can be easily inserted into the pair of grooves 113.

[0093] With the pair of power supply terminals 21, the protrusion 22, and the pair of protrusions 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 attachment portion 202 of the light source unit 2 comes into contact with the bottom 110 of the power supply socket 1. With the attachment portion 202 and the bottom 110 in contact, each protrusion 24 is positioned above the restriction portion 114.

[0094] With the mounting portion 202 and the bottom portion 110 in contact with each other, the worker rotates the light source unit 2 relative to the power feed socket 1, with the vertical direction as the rotation axis. Specifically, the worker rotates the light source unit 2 relative to the power feed socket 1 clockwise when viewed from below (counterclockwise when viewed from above).

[0095] By rotating the light source unit 2 relative to the power socket 1, the pair of power supply terminals 21 move counterclockwise along the pair of guide holes H3 as viewed from above. At this time, the large diameter portion 212 of each 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.

[0096] Furthermore, by rotating the light source unit 2 relative to the power supply socket 1, the protrusion 22 moves counterclockwise as viewed from above. Accordingly, the pair of protrusions 24 protruding from the protrusion 22 enter the pair of gaps G1 (see FIG. 8) from the pair of grooves 113. Furthermore, the pair of protrusions 24 move counterclockwise as viewed from above while in contact with the pair of restricting portions 114 in the pair of gaps G1. Here, the pair of restricting portions 114 restrict the downward movement of the protrusion 22.

[0097] 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.

[0098] (4) Effects In the power feeding socket 1 according to the embodiment, when the light source unit 2 is attached to the power feeding socket 1, the protrusion 22 of the light source unit 2 is received in the housing 10 of the power feeding socket 1 through the second insertion hole H2. This allows the lighting device 100 to be made smaller (thinner). Furthermore, in the power feeding socket 1, the second insertion hole H2 provided in the first housing 11 is covered by the lid 1201. This prevents the user from touching the charging unit. In other words, the power feeding socket 1 according to the embodiment allows for both miniaturization and safety.

[0099] Furthermore, in the power feeding socket 1 according to the embodiment, the lid 1201 is configured by the bottom 120 of the second housing 12 of the power feeding socket 1, which makes it possible to improve safety with a simple structure.

[0100] Furthermore, in the power supply socket 1 according to the embodiment, the guide wall 112 (first side wall) and the inner side wall 124 (second side wall) overlap in the vertical direction (insertion direction) when the first housing 11 is attached to the second housing 12. This makes it possible to prevent foreign matter from entering the inside of the housing 10.

[0101] In addition, in the power supply socket 1 of the embodiment, by providing a gap G2 between the first surface S3 of the bottom 120 of the second housing 12 and one surface S5 of the bottom 220 of the protrusion 22, it is possible to improve the attachment of the light source unit 2 to the power supply socket 1.

[0102] Furthermore, in the power feeding socket 1 according to the embodiment, the adjustment hole 222 and the through-hole 123 are provided, so that the internal pressure of the protruding portion 22 can be adjusted.

[0103] Furthermore, since the lighting device 100 according to the embodiment includes the power supply socket 1, it is possible to achieve both miniaturization and safety.

[0104] (5) Variations The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described 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-described embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0105] In the above-described embodiment, the lighting device 100 is a downlight, but the lighting device 100 is not limited to a downlight and may be, for example, a spotlight.

[0106] In the above-described embodiment, the lid portion 1201 is provided on the second housing 12, but the lid portion may be provided on the first housing 11. In this case, the lid portion is formed, for example, at the tip (upper end) of the guide wall 112 of the first housing 11 so as to close the second insertion hole H2.

[0107] In the above-described embodiment, the adjustment hole 222 provided in the protrusion 22 is a gas vent hole for explosion prevention, but the adjustment hole 222 may be any hole that adjusts the internal pressure of the protrusion 22, and is not limited to a gas vent hole for explosion prevention.

[0108] In the above-described embodiment, the second housing 12 is cylindrical and has an opening OP1 on one surface (lower surface), but the second housing may be, for example, flat (for example, disc-shaped).

[0109] In the above-described embodiment, the guide wall 112 (first side wall) of the first housing 11 and the inner side wall 124 (second side wall) of the second housing 12 overlap in the vertical direction (insertion direction). However, the first side wall of the first housing 11 and the second side wall of the second housing 12 may overlap so as to be adjacent to each other in the insertion direction, for example.

[0110] (Aspect) The present specification discloses the following aspects.

[0111] The power feed socket (1) according to the first aspect is a power feed socket (1) that supplies power to a light source unit (2) having a protrusion (22). The power feed socket (1) includes a first housing (11), a second housing (12), and a lid (1201). The first housing (11) has an insertion hole (H2) into which the protrusion (22) of the light source unit (2) is inserted. The first housing (11) is attached to the second housing (12). When the first housing (11) is attached to the second housing (12), the lid (1201) overlaps with the insertion hole (H2) in a plan view from the insertion direction. The insertion direction is the direction in which the protrusion (22) is inserted into the insertion hole (H2).

[0112] According to this aspect, it is possible to achieve both miniaturization and safety.

[0113] In the power supply socket (1) according to the second aspect, in the first aspect, the cover portion (1201) is a part of the portion (120) of the second housing (12) that faces the insertion hole (H2) of the first housing (11).

[0114] According to this aspect, it is possible to improve safety with a simple structure.

[0115] In the power feeding socket (1) according to the third aspect, in the second aspect, the first housing (11) further has a first side wall (112) protruding from the opening edge (H20) of the insertion hole (H2) toward the second housing (12). The second housing (12) further has a second side wall (124) protruding from the outer edge of the lid portion (1201) toward the first housing (11). When the first housing (11) is attached to the second housing (12), the first side wall (112) and the second side wall (124) overlap in the insertion direction.

[0116] According to this embodiment, it is possible to prevent foreign matter from entering the inside of the housing (10).

[0117] In the power feeding socket (1) according to the fourth aspect, in any one of the first to third aspects, when the light source unit (2) is attached to the power feeding socket (1), there is a gap (G2) between a surface (S5) of the protrusion (22) facing the lid portion (1201) and a surface (S3) of the lid portion (1201) facing the protrusion (22).

[0118] According to this aspect, it is possible to improve the attachability of the light source unit (2) to the power supply socket (1).

[0119] In the power feed socket (1) according to the fifth aspect, in any one of the first to fourth aspects, the protrusion (22) has an adjustment hole (222) for adjusting the internal pressure of the protrusion (22). The lid (1201) has a through-hole (123) that penetrates the lid (1201) along the insertion direction.

[0120] According to this embodiment, it is possible to adjust the internal pressure of the protruding portion (22).

[0121] A lighting device (100) according to a sixth aspect includes the power supply socket (1) according to any one of the first to fifth aspects and a light source unit (2).

[0122] According to this aspect, since the power supply socket (1) is provided, it is possible to achieve both miniaturization and safety.

[0123] The configurations according to the second to fifth aspects are not essential for the power feeding socket (1) and can be omitted as appropriate. [Explanation of symbols]

[0124] 1 power socket 2 Light source unit 11 First cabinet 12 Second enclosure 22 Protrusion 100 lighting equipment 112 Guide wall (first side wall) 120 Bottom (part) 123 Through Hole 124 Inner wall (second side wall) 222 Adjustment hole 1201 Lid G2 gap H2 Second insertion hole (insertion hole) H20 Periphery (opening edge) OP1 opening S3 1st side (side) S5 One side (side)

Claims

1. A power supply socket for supplying power to a light source unit having a protrusion, a first housing having an insertion hole into which the protrusion of the light source unit is inserted; a second housing to which the first housing is attached; a cover portion that overlaps with the insertion hole in a plan view from an insertion direction that is a direction in which the protrusion is inserted into the insertion hole when the first housing is attached to the second housing, Power supply socket.

2. the lid portion is a part of a portion of the second housing that faces the insertion hole of the first housing, The power supply socket according to claim 1.

3. the first housing further includes a first side wall that protrudes from an opening edge of the insertion hole toward the second housing, the second housing further includes a second side wall protruding from an outer edge of the lid portion toward the first housing, When the first housing is attached to the second housing, the first side wall and the second side wall overlap with each other in the insertion direction. The power supply socket according to claim 2.

4. When the light source unit is attached to the power supply socket, there is a gap between a surface of the protrusion facing the lid and a surface of the lid facing the protrusion. The power supply socket according to any one of claims 1 to 3.

5. the protruding portion has an adjustment hole for adjusting the internal pressure of the protruding portion, The lid portion has a through-hole that penetrates the lid portion along the insertion direction. The power supply socket according to any one of claims 1 to 3.

6. The power supply socket according to any one of claims 1 to 3; The light source unit, Lighting equipment.

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