Power supply socket and lighting device

Abstract

An object of the present disclosure is to improve the reliability of an electrical connection state.SOLUTION: The power supply socket 1 includes a conductive part 13, a socket body 10, and a spring member 14. The socket body 10 houses the conductive part 13. The spring member 14 biases the power supply terminal 21 in a direction approaching the conductive portion 13. The conductive portion 13 includes a contact portion 135 that comes into contact with the power feeding terminal 21. The contact portion 135 includes a first contact piece 136, a second contact piece 137, and a support piece 138. The first contact pieces 136 come into contact with the power supply terminals 21 from the D1 in the first direction. The second contact pieces 137 come into contact with the power supply terminals 21 from a second direction D1 different from the first direction D2. The support piece 138 protrudes from a rear end of the first contact piece 136 and is supported by the terminal portion 130 in a deflectable manner.SELECTED DRAWING: Figure 7

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 to which a light source unit is detachably attached, and a lighting device including the power supply socket and the light source unit. [Background technology]

[0002] As an example of a conventional socket, the socket (power supply socket) described in Patent Document 1 is shown. The socket described in Patent Document 1 (hereinafter referred to as the conventional socket) is configured with a plurality of terminals arranged around the periphery of a base receiving portion. The conventional socket is configured so that when the lamp unit is attached to the device body, the base of the lamp unit is engaged with the base receiving portion, and the plurality of terminal pins of the lamp unit are electrically connected to the corresponding terminals. [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] However, in conventional sockets (power supply sockets), the terminal pins of the lamp unit may temporarily become disconnected from the terminal portion due to, for example, vibrations of the building, etc. Therefore, in conventional sockets (power supply sockets), it is desired to improve the reliability of the electrical connection between the terminal pins of the lamp unit and the terminal portion.

[0005] An object of the present disclosure is to provide a power socket and a lighting device that can improve the reliability of the electrical connection state. [Means for solving the problem]

[0006] A power feed socket according to one aspect of the present disclosure includes one or more conductive parts electrically connected to a power feed terminal of a light source unit, a main body that houses the conductive parts, and a spring member housed in the main body and biasing the power feed terminal toward the conductive parts. The conductive parts have a terminal part electrically connected to an external power source and a contact part that contacts the power feed terminal. The contact part has a first contact piece, a second contact piece, and a support piece. The first contact piece contacts the power feed terminal from a first direction. The second contact piece protrudes from a tip of the first contact piece and contacts the power feed terminal from a second direction different from the first direction. The support piece protrudes from a rear end of the first contact piece and is flexibly supported by the terminal part.

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

[0008] The power supply socket and lighting device of the present disclosure have the advantage of being able to improve the reliability of the electrical connection state. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an illumination device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view of the lighting device as viewed obliquely from above. [Figure 3] FIG. 3 is an exploded perspective view of the lighting device as viewed obliquely from below. [Figure 4] FIG. 4 is an exploded 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 feed socket and the light source unit attached to the power feed socket, with the second body not shown. [Figure 6] FIG. 6 is a top view of the power feed socket and the light source unit attached to the power feed socket, with the second body not shown. [Figure 7] FIG. 7 is a top view of the main parts of the power feed socket and the light source unit attached to the power feed socket, with the second body not shown. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a power supply socket and a lighting device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each diagram described in the following embodiments is a schematic diagram, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0011] (1) Overview The power feed socket 1 according to the embodiment includes one or more conductive parts 13, a main body (socket main body 10), and a spring member 14 (see FIG. 4).

[0012] The conductive portion 13 is electrically connected to a power supply terminal 21 of the light source unit 2 (see FIG. 6). The socket body 10 accommodates the conductive portion 13. The spring member 14 is accommodated in the socket body 10 and biases the power supply terminal 21 in a direction approaching the conductive portion 13 (see FIG. 7).

[0013] The conductive portion 13 has a terminal portion 130 electrically connected to an external power supply and a contact portion 135 that comes into contact with the power supply terminal 21 .

[0014] The contact portion 135 has a first contact piece 136, a second contact piece 137, and a support piece 138 (see FIG. 4). The first contact piece 136 contacts the power supply terminal 21 from a first direction D1. The second contact piece 137 protrudes from the tip of the first contact piece 136 and contacts the power supply terminal 21 from a second direction D2 different from the first direction D1 (see FIG. 7). The support piece 138 protrudes from the rear end of the first contact piece 136 and is supported by the terminal portion 130 in a flexible manner.

[0015] According to the above configuration, when the power supply terminal 21 biased by the spring member 14 comes into contact with the first contact piece 136 and the second contact piece 137, the first contact piece 136 and the second contact piece 137 are pushed by the biasing force (spring force) of the spring member 14, thereby bending the support piece 138. Then, as the support piece 138 bends, a force is generated that causes the first contact piece 136 to press the power supply terminal 21 along the first direction D1, and a force is generated that causes the second contact piece 137 to press the power supply terminal 21 along the second direction D2 (see FIG. 7 ).

[0016] Thus, the power feed socket 1 according to the embodiment causes the first contact piece 136 and the second contact piece 137 to contact the power feed terminal 21 from the first direction D1 and the second direction D2 by deflecting the support piece 138 using the biasing force (spring force) of the spring member 14. Therefore, the power feed socket 1 according to the embodiment can easily maintain contact between the contact portion 135 and the power feed terminal 21 even if an impact is applied to the light source unit 2. As a result, the power feed socket 1 according to the embodiment can improve the reliability of the electrical connection between the conductive portion 13 and the power feed terminal 21.

[0017] The lighting device 100 according to the embodiment includes the power supply socket 1 according to the embodiment and the light source unit 2.

[0018] Therefore, since the lighting device 100 according to the embodiment includes the power feeding socket 1 according to the embodiment, the reliability of the electrical connection between the conductive portion 13 and the power feeding terminal 21 can be improved.

[0019] (2)Details (2-1) Power supply socket according to the embodiment 2 to 6, the power feeding socket 1 according to the embodiment (hereinafter simply referred to as the power feeding socket 1) has a main body (socket main body 10), a pair of conductive parts 13, and a pair of spring members 14. The pair of conductive parts 13 and the pair of spring members 14 are housed inside the socket main body 10.

[0020] (2-1-1) Socket body The socket body 10 is configured by combining a first body 11 and a second body 12 in one direction (up and down). Note that Figures 5 and 6 are top views of the power feed socket 1 and the light source unit 2 with the second body 12 not shown in the power feed socket 1 in a state where the light source unit 2 is attached.

[0021] The first body 11 has a disk-shaped first bottom 110, a cylindrical outer wall 115 protruding upward from the periphery of the first bottom 110, and an inner wall 111 protruding upward from the center of the first bottom 110 (see FIGS. 4 to 6). The first bottom 110, the outer wall 115, and the inner wall 111 are integrally formed from synthetic resin.

[0022] The socket body 10 is provided with a guide portion 116 including a pair of insertion holes (first insertion holes H1) into which the power supply terminals 21 described later can be inserted and removed, and an elongated hole (guide hole H3) whose first end is connected to the first insertion holes H1 (see Figures 3, 5 and 6).

[0023] The pair of first insertion holes H1 are circular through-holes that penetrate the first bottom portion 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 first bottom portion 110 (see FIG. 5). The pair of power supply terminals 21 are inserted upward into the pair of first insertion holes H1.

[0024] The pair of guide holes H3 are elongated holes that penetrate the first bottom portion 110 in the thickness direction. The pair of guide holes H3 are provided so as to be point-symmetric with respect to the center point C1 of the first bottom portion 110 (see FIG. 5). Here, the pair of guide holes H3 are connected to the pair of first insertion holes H1, respectively. More specifically, the guide holes H3 are formed in an arc shape that extends from the first insertion holes H1 and has the center point C1 as its center. The width of the guide hole H3 (the width in the radial direction of the first 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. Thus, by rotating the light source unit 2 about 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 holes 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 the direction opposite (downward) to the direction (upward) in which the pair of large diameter portions 212 are inserted into the pair of first insertion holes H1 is restricted.

[0025] The pair of guide portions 116 are configured to guide the pair of power supply terminals 21 to a connection position where they are electrically connected to the pair of conductive portions 13. That is, when the light source unit 2 is rotated with respect to the power supply socket 1, each guide portion 116 guides the power supply terminal 21 inserted into the first insertion hole H1 along the edge of the guide hole H3 to the connection position.

[0026] The second insertion hole H2 is a circular through-hole that penetrates the first bottom portion 110 in the thickness direction. The second insertion hole H2 is provided in the center of the first bottom portion 110 so that its center coincides with the center point C1 of the first bottom portion 110. The diameter of the second insertion hole H2 is larger than the diameter of a protrusion 22 of the light source unit 2, which will be described later. 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.

[0027] As shown in FIGS. 4 to 6, 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 protrude upward from the periphery H20 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 first bottom portion 110. The pair of guide walls 112 guide the protrusion 22 inserted upward from the second insertion hole H2.

[0029] The pair of grooves 113 are formed to protrude from the pair of guide walls 112 in a direction away from the center point C1 along the radial direction of the second insertion hole H2. The pair of grooves 113 are provided at positions that are point-symmetric with respect to the center point C1 of the first bottom 110 (see FIG. 5). When the protrusion 22 is inserted into the second insertion hole H2, the pair of protrusions 24 provided on the side surfaces of the protrusion 22 are inserted into the pair of grooves 113 (see FIG. 5).

[0030] The pair of restricting portions 114 protrude upward from the periphery H20 of the second insertion hole H2. That is, the pair of restricting portions 114 are formed in an arc shape when viewed in a plan view from the up-down direction.

[0031] As shown in FIG. 4, 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 first 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 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 second bottom portion 120 of the second body 12. In other words, a pair of gaps G1 are formed in the socket body 10 (see FIG. 4). The protrusions 24 inserted into the grooves 113 move in the gap G1 by rotating the light source unit 2 around the center point C1.

[0032] 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.

[0033] Further, inside the first body 11, a pair of holding portions 1100 are provided to hold the pair of conductive portions 13, respectively (see FIG. 5).

[0034] As shown in FIG. 5, the holding portion 1100 has a groove (fixing groove 1101) whose longitudinal direction is the up-down direction. A fixing piece 133 of the conductive portion 13 is inserted into the fixing groove 1101. As shown in FIG. 4, the holding portion 1100 also has an insertion hole B1 into which the electric wire W1 inserted downward into an electric wire insertion hole H4 (described later) is inserted. The insertion hole B1 is a hole with a bottom. The electric wire W1 inserted downward into the electric wire insertion hole H4 and electrically connected to the conductive portion 13 held by the holding portion 1100 is inserted into the insertion hole B1.

[0035] The second main body 12 includes a disk-shaped second bottom portion 120, a pair of wire guide portions 121, and an outer wall portion 122 (see FIG. 4). The second bottom portion 120, the pair of wire guide portions 121, and the outer wall portion 122 are integrally formed from synthetic resin.

[0036] A pair of electric wire insertion holes H4 are provided in the second bottom portion 120. A pair of electric wires W1 drawn out 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 are individually and electrically connected to the terminal portions 130 of the pair of conductive portions 13.

[0037] The pair of wire guide portions 121 protrude upward from the upper surface of the second bottom portion 120. Each of the pair of wire guide portions 121 has a wire guide portion 1211 and a reinforcing portion 1212 (see FIG. 4). The wire guide portion 1211 is formed in an annular shape protruding upward from the periphery of the wire insertion hole H4. The wire guide portion 1211 is configured to guide the wire W1 toward the wire insertion hole H4. The wire W1 is guided by the wire guide portion 1211, so that the wire W1 can be easily inserted into the wire insertion hole H4.

[0038] The reinforcing portion 1212 is formed in the shape of a rail that protrudes from the wire guide portion 1211 along the surface of the second bottom portion 120 .

[0039] The outer wall portion 122 is formed in a cylindrical shape that protrudes downward from the entire outer periphery of the second bottom portion 120. The outer wall portion 122 is disposed inside the outer wall portion 115 of the first main body 11 when the first main body 11 and the second main body 12 are combined together.

[0040] (2-1-2) Conductive part The pair of conductive parts 13 are formed to have the same shape and dimensions and are held by the holding part 1100 of the first main body 11 so as to be point symmetrical with respect to the center point C1 (see FIG. 5).

[0041] The conductive portion 13 has a terminal portion 130 and a contact portion 135 (see FIG. 4). The terminal portion 130 and the contact portion 135 are integrally formed from a metal plate material such as copper or a copper alloy.

[0042] The terminal portion 130 has a pair of leg pieces 131, a locking piece 132, a fixing piece 133, and a connecting piece 134 (see FIGS. 4 and 6). The pair of leg pieces 131, the locking piece 132, the fixing piece 133, and the connecting piece 134 are integrally formed by punching and bending a metal plate material.

[0043] The fixing piece 133 is formed in a flat plate shape. Both widthwise ends of the fixing piece 133 are inserted into the fixing grooves 1101 of the holding part 1100, whereby the conductive part 13 is held by the holding part 1100 of the first main body 11 (see FIGS. 5 and 6).

[0044] A pair of leg pieces 131 protrude from both widthwise ends of the upper end of the fixed piece 133. The tips of the pair of leg pieces 131 are connected to the rear end of the locking piece 132. The rear end portion of the locking piece 132 is rounded into a cylindrical shape. The tip portion of the locking piece 132 faces the fixed piece 133 with a gap therebetween.

[0045] The connecting piece 134 protrudes from the lower end of the fixing piece 133 in the opposite direction to the leg piece 131. The tip of the connecting piece 134 is bent downward.

[0046] In the terminal portion 130, the tip of the electric wire W1 inserted through the electric wire insertion hole H4 passes between the pair of leg pieces 131 and abuts against the tip of the locking piece 132. Then, as the electric wire W1 is inserted, the locking piece 132 is pushed by the tip of the electric wire W1 and bends, and when the electric wire W1 eventually passes the tip of the locking piece 132, the tip of the locking piece 132 catches on the side of the electric wire W1. As a result, the spring force of the locking piece 132 presses the electric wire W1 against the fixing piece 133, and the locking piece 132 prevents the electric wire W1 from coming loose, so that the terminal portion 130 is electrically and mechanically connected to the electric wire W1. Thus, 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.

[0047] The contact portion 135 has a first contact piece 136, a second contact piece 137, a support piece 138, and a bent piece 139. The first contact piece 136, the second contact piece 137, the support piece 138, and the bent piece 139 are integrally formed by bending a metal plate material.

[0048] One end of the support piece 138 is connected to the tip of the connecting piece 134 of the terminal portion 130. A portion of the support piece 138 is curved in a semi-cylindrical shape (see FIG. 4). The other end of the support piece 138 is connected to the rear end of the first contact piece 136. In other words, the support piece 138 protrudes from the rear end of the first contact piece 136 and is supported by the terminal portion 130 in a flexible manner.

[0049] The second contact piece 137 protrudes from the tip of the first contact piece 136, and the first contact piece 136 and the second contact piece 137 are formed in a V shape when viewed from above and below (see FIG. 6). In addition, a bent piece 139 is provided at the tip of the second contact piece 137.

[0050] Here, the first body 11 has a limiting portion 117 that limits the displacement of the contact portion 135 when the terminal portion 130 is accommodated in the socket body 10 (see FIG. 4). The limiting portion 117 protrudes upward from the inner bottom surface of the first bottom portion 110 of the first body 11. The limiting portion 117 is configured to face the first contact piece 136 and the second contact piece 137 so as to fit along the inner bottom surface of the first bottom portion 110.

[0051] Furthermore, the first body 11 has a pair of positioning portions 118 that individually position the pair of conductive portions 13 (terminal portions 130) when the pair of conductive portions 13 are accommodated in the socket body 10 (see FIG. 6). The pair of positioning portions 118 have grooves provided in protrusions that protrude from the inner circumferential surface of the outer wall portion 115 of the first body 11 toward the inner wall portion 111. That is, the conductive portions 13 are positioned relative to the first body 11 by inserting the tips of the connecting pieces 134, which are bent downward, into the grooves of the positioning portions 118 (see FIG. 6).

[0052] Thus, when the pair of conductive portions 13 are housed in the first main body 11, the terminal portions 130 of the pair of conductive portions 13 are located adjacent to the second ends (ends opposite to the first ends) of the pair of guide holes H3 (see FIG. 5). In other words, the pair of conductive portions 13 are housed outside the second ends of the guide holes H3 in the socket main body 10 so as not to be visible from the insertion direction (vertical direction) of the power supply terminal 21 into the first insertion hole H1.

[0053] (2-1-3) Spring material The pair of spring members 14 are formed of a plate-shaped metal member such as a stainless steel strip for springs. Each of the pair of spring members 14 has a fixed end piece 141, a spring piece 142, and a free end piece 143 (see FIG. 4). The fixed end piece 141, the spring piece 142, and the free end piece 143 are integrally formed by bending the plate-shaped metal member.

[0054] The fixed end piece 141 is formed into a hook shape by bending one longitudinal end of the spring member 14. The free end piece 143 is flat and is provided at the other longitudinal end of the spring member 14. The spring piece 142 is formed by bending the portion of the spring member 14 excluding both ends (the fixed end piece 141 and the free end piece 143) into a mountain shape.

[0055] The pair of spring members 14 are attached to the first main body 11 by hooking the fixed end pieces 141 onto a pair of columnar portions 1102 provided on the first bottom portion 110 of the first main body 11 (see FIG. 5). The free end pieces 143 of the pair of spring members 14 are inserted into holding grooves 1103 provided on the first bottom portion 110 of the first main body 11 (see FIG. 5). The free end pieces 143 are held on the first main body 11 in a state where they can move along the holding grooves 1103. In the pair of spring members 14 attached to the first main body 11, the bent portions (the vertices of the mountain shapes) of the spring pieces 142 overlap with the guide holes H3 when viewed from the top-bottom direction (see FIG. 5).

[0056] (2-2) Details of the lighting device according to the embodiment The lighting device 100 according to the embodiment (hereinafter simply referred to as lighting device 100) is a downlight that is embedded in a ceiling (see FIG. 1). However, the lighting device 100 is not limited to a downlight, and may be, for example, a spotlight that is installed on a ceiling or a wall and whose light irradiation direction can be changed.

[0057] As shown in FIGS. 1 to 3, the lighting device 100 includes a light source unit 2, a power supply socket 1, a cover member 6, a terminal block 7, and an attachment member 8. In the following description, the front-to-rear, left-to-right, and up-to-down directions (vertical directions) indicated by arrows in the drawings are defined as the front-to-rear, left-to-right, and up-to-down directions 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.

[0058] (2-2-1) 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 AC 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. 2) that electrically connects the terminal block 7 to the power feed socket 1. The AC power input to the power feed socket 1 is supplied to the light source unit 2 attached to the power feed socket 1.

[0059] 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).

[0060] The main body 20 is formed into a cylindrical shape from an insulating material such as synthetic resin.

[0061] An opening 201 is provided at one axial end (lower end) of the main body 20. A lens 23 is fitted in the opening 201 (see FIG. 3).

[0062] The light source unit is housed inside the main body 20. The light source unit has a light-emitting element such as an LED (Light Emitting Diode) and a light-emitting circuit that receives AC power supplied from the power supply socket 1 and causes the light-emitting element to emit light. Note that the light source unit may have a light-emitting element other than an LED, such as an organic electroluminescence element or a laser diode.

[0063] The lens 23 is configured to collect or diffuse the light emitted from the light source section (light emitting element).

[0064] The main body 20 has an attachment plate 202 at the other axial end (upper end) thereof. The attachment plate 202 is formed in a disk shape when viewed from the axial direction (up-down direction) of the main body 20.

[0065] 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.

[0066] The pair of power supply terminals 21 are provided so as to protrude upward from the pair of through holes 203 of the mounting plate portion 202. The pair of power supply terminals 21 are terminals for receiving AC power from the power supply socket 1 for causing the light source portion of the light source unit 2 to emit light. The pair of power supply terminals 21 receive AC power from the power supply socket 1 when the light source unit 2 is attached to the power supply socket 1.

[0067] 5 and 6, the power supply terminal 21 has a small diameter portion 211 and a large diameter portion 212. The small diameter portion 211 is formed in a cylindrical shape and protrudes upward from the through hole 203 of the mounting plate portion 202. The large diameter portion 212 is formed in a disk shape with a diameter larger than that of the small diameter portion 211 and is formed at the tip (upper end) 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. 5 and 6) of the power supply socket 1, respectively, and rotating the light source unit 2 by a predetermined angle.

[0068] The protrusion 22 protrudes upward from the center of the mounting plate portion 202. The protrusion 22 is inserted into the second insertion hole H2 of the power feed socket 1 described above. 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 portion 20, which is also cylindrical. The protrusion 22 accommodates a part of the light source portion of the light source unit 2 inside.

[0069] As shown in FIG. 2, 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 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. Note that the width of the pair of protrusions 24 narrows toward the tip, as shown in FIGS. 5 and 6. 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.

[0070] (2-2-2) Cover member The cover member 6 is made of a good thermal conductor such as aluminum or an aluminum alloy and has an opening 61 on the bottom surface and a bottom plate 62 on the top surface, and is formed into a cylindrical shape with a bottom (see FIGS. 1 to 3). An annular flange portion 63 is provided at the bottom end of the cover member 6. The flange portion 63 protrudes outward from the bottom end of the cover member 6.

[0071] The bottom plate 62 is provided with a pair of screw insertion holes and a pair of through holes 621 (see FIG. 2). Fixing screws 64 are inserted into the pair of screw insertion holes one by one from below the bottom plate 62. These two fixing screws 64 are first inserted one by one into a pair of insertion holes 15 provided in the socket body 10, and then inserted one by one into the pair of screw insertion holes. Furthermore, as will be described later, the two fixing screws 64 are each inserted one by one into a pair of screw insertion holes 811 provided in the mounting member 8, and then a nut 65 is tightened one by one. In other words, the cover member 6 fixes the power feed socket 1 to the lower surface of the bottom plate 62 and fixes the mounting member 8 to the upper surface of the bottom plate 62 by the two sets of fixing screws 64 and nuts 65 (see FIG. 1).

[0072] Furthermore, a pair of wire guides 121 of the power feeding socket 1 are inserted into a pair of through holes 621 provided in the bottom plate 62 from below the bottom plate 62. That is, one end of the wire W1 is electrically connected to the terminal block 7 and the other end is inserted through the pair of through holes 621 into the wire insertion hole H4 exposed above the bottom plate 62, and is electrically and mechanically connected to the terminal portion 130 of the power feeding socket 1.

[0073] (2-2-3) Mounting parts 2 and 3, the mounting member 8 has a fixing plate portion 81 and a pair of legs 82. The fixing plate portion 81 is formed in the shape of a long plate. The terminal block 7 is attached to the underside of one end portion of the fixing plate portion 81 in the longitudinal direction.

[0074] The other end of the fixing plate 81 in the longitudinal direction is provided with a recess 810 that protrudes upward and a pair of screw insertion holes 811. When viewed in the thickness direction (vertical direction) of the fixing plate 81, the recess 810 is formed in an oval shape with its longitudinal direction coinciding with the longitudinal direction of the fixing plate 81. The pair of screw insertion holes 811 are provided, one on each side of the recess 810. As described above, the mounting member 8 is fixed to the upper surface of the bottom plate 62 by tightening the nuts 65 onto the two fixing screws 64 that are inserted one by one into the pair of screw insertion holes 811.

[0075] Here, in a state where the mounting member 8 is fixed to the bottom plate 62 (cover member 6), the electric wire W1 and the electric wire guide portion 121 are housed in the space between the recessed portion 810 of the mounting member 8 and the upper surface of the bottom plate 62.

[0076] The pair of legs 82 protrude downward from both ends in the short direction at the other longitudinal end of the fixing plate 81. A pair of mounting springs 9 are attached to the lower end portions of the pair of legs 82, one each (see FIG. 1). Each of the pair of mounting springs 9 is formed into a curved band shape from, for example, a stainless steel plate. One longitudinal end of each mounting spring 9 is fixed to the lower end of the corresponding leg 82.

[0077] Thus, the cover member 6 to which the mounting member 8 is attached together with the pair of mounting springs 9 is inserted into a circular embedding hole provided in the ceiling material (ceiling finish material). Then, by sandwiching the ceiling material between the pair of mounting springs 9 and the flange portion 63 of the cover member 6, the cover member 6 and the mounting member 8 can be installed so as to be embedded in the ceiling.

[0078] (2-3) How to attach the light source unit to the power socket Next, a procedure for attaching the light source unit 2 to the power socket 1 in a situation where the lighting device 100, excluding the light source unit 2, is recessed into the ceiling will be described.

[0079] The worker performing the installation work (hereinafter referred to as the worker) holds the lower part of the main body 20 in his / her hand and inserts the light source unit 2 into the cover member 6 through the opening 61. Then, the worker aligns the pair of protrusions 24 with the grooves 113 of the socket main body 10, and inserts the protrusions 22 into the second insertion holes H2 of the socket main body 10. Here, by inserting the protrusions 22 into the second insertion holes H2 with the pair of protrusions 24 aligned with the grooves 113, the worker can insert the pair of power feeding terminals 21 one by one into the pair of first insertion holes H1 of the power feeding socket 1.

[0080] Next, the worker rotates the body 20 held in his / her hand counterclockwise as viewed from below. When the body 20 rotates counterclockwise, the pair of power supply terminals 21 inserted into the pair of first insertion holes H1 move along the guide holes H3, and the pair of protrusions 24 move through the gap G1 of the socket body 10.

[0081] The large diameter portion 212 of the power supply terminal 21 comes into contact with the spring piece 142 of the spring member 14 protruding into the guide hole H3, and moves inside the guide hole H3 while pushing and bending the spring piece 142, eventually climbing over the apex of the bent portion of the spring piece 142. At this time, the worker can feel a click in the hand holding the main body 20 as the large diameter portion 212 of the power supply terminal 21 climbs over the apex of the bent portion of the spring piece 142.

[0082] After climbing over the apex of the bent portion of the spring piece 142, the large diameter portion 212 of the power supply terminal 21 comes into contact with the first contact piece 136 and the second contact piece 137 of the contact portion 135 (see FIGS. 6 and 7). At this time, the pair of protrusions 24 of the protruding portion 22 are caught, one by one, on the pair of restricting portions 114 of the first main body 11. Therefore, even if the worker releases his / her hands from the main body 20, the light source unit 2 will not fall.

[0083] The large diameter portions 212 of the pair of power supply terminals 21 are each pushed toward the contact portion 135 by the biasing force (spring force) of the pair of spring members 14. The large diameter portions 212 of the pair of power supply terminals 21 then push the first contact piece 136 and the second contact piece 137 away from the guide hole H3, thereby deflecting the support piece 138. As a result, the large diameter portions 212 of the pair of power supply terminals 21 are each pushed by the first contact piece 136 from the first direction D1, pushed by the second contact piece 137 from the second direction D2, and pushed by the spring piece 142 of the spring member 14 from the third direction D3 (see FIG. 7). Note that the first direction D1 is different from the second direction D2. However, the third direction D3 may be different from the first direction D1 and the second direction D2, or may be the same as the first direction D1 or the second direction D2.

[0084] Using the above procedure, the worker can attach the light source unit 2 to the power feed socket 1. The worker can also remove the light source unit 2 from the power feed socket 1 by rotating the main body 20 clockwise when viewed from below.

[0085] (2-4) Advantages of the embodiment As described above, the power feed socket 1 causes the first contact piece 136 to contact the power feed terminal 21 from the first direction D1 and the second contact piece 137 to contact the power feed terminal 21 from the second direction D2 different from the first direction D1 by deflecting the support piece 138 with the biasing force (spring force) of the spring member 14 (see FIG. 7 ). Here, compared to a case where the contact portion 135 of the conductive portion 13 contacts the power feed terminal 21 from only one direction, the power feed socket 1 can reduce the possibility that the contact portion 135 will temporarily separate from the power feed terminal 21 when vibration or impact is applied to the light source unit 2. Furthermore, because the contact portion 135 of the conductive portion 13 has spring properties, the power feed socket 1 can cause the contact portion 135 (the first contact piece 136 and the second contact piece 137) to follow the movement of the power feed terminal 21. Therefore, even if the contact portion 135 separates from the power supply terminal 21 when the light source unit 2 is subjected to vibration or impact, the power supply socket 1 can shorten the time that the contact portion 135 is separated from the power supply terminal 21.

[0086] Therefore, the power feed socket 1 is likely to maintain contact between the contact portion 135 and the power feed terminal 21 even if an impact is applied to the light source unit 2. As a result, the power feed socket 1 can improve the reliability of the electrical connection between the conductive portion 13 and the power feed terminal 21. Note that the power feed socket 1 may be provided with one or more contact pieces on the contact portion 135 that contact the power feed terminal 21 from a direction different from both the first direction D1 and the second direction D2.

[0087] Furthermore, the power feed socket 1 has the first contact piece 136, the second contact piece 137, and the support piece 138 integrally formed from a strip-shaped member having spring properties (for example, a metal plate material such as copper or a copper alloy). Therefore, the power feed socket 1 has the advantage that the contact portion 135 having spring properties can be easily formed.

[0088] Furthermore, since the power supply socket 1 has the first contact piece 136 and the second contact piece 137 formed in a V shape, the first contact piece 136 and the second contact piece 137 can be brought into contact with the power supply terminal 21 from two different directions (first direction D1 and second direction D2) with a simple structure such as bending a plate material.

[0089] Here, in the power feed socket 1, at least a portion of the support piece 138 is curved, so that the support piece 138 can bend more easily than if it is not curved (for example, if it is simply bent).

[0090] Furthermore, the power feed socket 1 accommodates the conductive portion 13 outside the second end of the guide hole H3 in the socket body 10, making the conductive portion 13 invisible when viewed from the insertion direction (vertical direction) of the power feed terminal 21 into the first insertion hole H1. In other words, the power feed socket 1 accommodates the conductive portion 13 outside the guide hole H3 when viewed from the vertical direction. Therefore, the power feed socket 1 reduces the possibility of a finger or the like touching the conductive portion 13 through the guide hole H3 compared to when the conductive portion 13 is visible through the guide hole H3.

[0091] Furthermore, the power feeding socket 1 has a limiting portion 117 on the socket body 10 (see FIG. 4). The limiting portion 117 is configured to limit the displacement of the contact portion 135 when the first contact piece 136 and the second contact piece 137 are in contact with the power feeding terminal 21. By limiting the displacement of the first contact piece 136 and the second contact piece 137 with the limiting portion 117, the power feeding socket 1 can improve the durability of the first contact piece 136 and the second contact piece 137.

[0092] The power feed socket 1 also has a positioning portion 118 on the socket body 10 that positions the conductive portion 13 (see FIG. 6). Thus, by positioning the conductive portion 13 with the positioning portion 118 of the socket body 10, the power feed socket 1 can prevent misalignment between the power feed terminal 21 and the conductive portion 13 (the first contact piece 136 and the second contact piece 137). As a result, the power feed socket 1 can further improve the reliability of the electrical connection between the conductive portion 13 and the power feed terminal 21.

[0093] In the power feed socket 1, the force with which the spring member 14 urges the power feed terminal 21 is greater than the force applied to the power feed terminal 21 by the contact portion 135. In other words, if the force with which the spring member 14 urges the power feed terminal 21 is equal to or less than the force applied to the power feed terminal 21 by the contact portion 135, the contact portion 135 may be more likely to separate from the power feed terminal 21 when vibration or impact is applied to the light source unit 2. Therefore, by making the force with which the spring member 14 urges the power feed terminal 21 greater than the force applied to the power feed terminal 21 by the contact portion 135, the power feed socket 1 can make it less likely for the contact portion 135 to separate from the power feed terminal 21. As a result, the power feed socket 1 can further improve the reliability of the electrical connection between the conductive portion 13 and the power feed terminal 21.

[0094] (3) Summary A power feed socket (1) according to a first aspect of the present disclosure includes one or more conductive portions (13), a main body (socket main body 10), and a spring member (14). The conductive portion (13) is electrically connected to a power feed terminal (21) of the light source unit (2). The main body houses the conductive portion (13). The spring member (14) is housed in the main body and biases the power feed terminal (21) toward the conductive portion (13). The conductive portion (13) has a terminal portion (130) electrically connected to an external power source and a contact portion (135) that contacts the power feed terminal (21). The contact portion (135) has a first contact piece (136), a second contact piece (137), and a support piece (138). The first contact piece (136) contacts the power feed terminal (21) from a first direction (D1). The second contact piece (137) protrudes from the tip of the first contact piece (136) and contacts the power supply terminal (21) from a second direction (D2) different from the first direction (D1). The support piece (138) protrudes from the rear end of the first contact piece (136) and is flexibly supported by the terminal portion (130).

[0095] The power feed socket (1) according to the first aspect deflects the support piece (138) using the biasing force (spring force) of the spring member (14), thereby bringing the first contact piece (136) and the second contact piece (137) into contact with the power feed terminal (21) from the first direction (D1) and the second direction (D2). Therefore, the power feed socket (1) according to the first aspect easily maintains contact between the contact portion (135) and the power feed terminal (21) even when an impact is applied to the light source unit (2). As a result, the power feed socket (1) according to the first aspect can improve the reliability of the electrical connection between the conductive portion (13) and the power feed terminal (21).

[0096] A power feed socket (1) according to a second aspect of the present disclosure can be realized in combination with the first aspect. In the power feed socket (1) according to the second aspect, the first contact piece (136), the second contact piece (137), and the support piece (138) are preferably integrally formed from a strip-shaped member having spring properties.

[0097] In the power supply socket (1) according to the second aspect, the contact portion (135) having spring properties can be easily formed.

[0098] A power feed socket (1) according to a third aspect of the present disclosure can be realized by combining it with the second aspect. In the power feed socket (1) according to the third aspect, it is preferable that the first contact piece (136) and the second contact piece (137) of the contact portion (135) are formed in a V-shape.

[0099] The power supply socket (1) according to the third aspect can bring the first contact piece (136) and the second contact piece (137) into contact with the power supply terminal (21) from two different directions (first direction D1, second direction D2) with a simple structure, for example, by bending a plate material.

[0100] The power feed socket (1) according to the fourth aspect of the present disclosure can be realized by combining it with any of the first to third aspects. In the power feed socket (1) according to the fourth aspect, it is preferable that at least a portion of the support piece (138) is curved.

[0101] In the power supply socket (1) according to the fourth aspect, the support piece (138) can be made more flexible than when the support piece (138) is not curved (for example, when it is simply bent).

[0102] A power feed socket (1) according to a fifth aspect of the present disclosure can be realized by combining it with any of the first to fourth aspects. In the power feed socket (1) according to the fifth aspect, the main body is preferably provided with a guide portion (116) including one or more insertion holes (first insertion holes H1) into which the power feed terminals (21) can be inserted and removed, and an elongated hole (guide hole H3) whose first end is connected to the insertion hole. The conductive portion (13) is preferably housed outside the second end of the elongated hole, which is the other end of the first end, in the main body so that it is not visible from the insertion direction of the power feed terminals (21) into the insertion holes.

[0103] The power supply socket (1) according to the fifth aspect can reduce the possibility that a finger or the like will come into contact with the conductive part (13) through the slot, compared to when the conductive part (13) is visible through the slot.

[0104] A power feed socket (1) according to a sixth aspect of the present disclosure can be realized by combining it with any of the first to fifth aspects. In the power feed socket (1) according to the sixth aspect, the main body preferably has a limiting portion (117) that limits the displacement of the contact portion (135) when the first contact piece (136) and the second contact piece (137) are in contact with the power feed terminal (21).

[0105] The power supply socket (1) of the sixth aspect can improve the durability of the first contact piece (136) and the second contact piece (137) by limiting the displacement of the first contact piece (136) and the second contact piece (137) with the limiting portion (117).

[0106] A power feed socket (1) according to a seventh aspect of the present disclosure can be realized by combining it with any of the first to sixth aspects. In the power feed socket (1) according to the seventh aspect, the main body preferably has a positioning portion (118) that positions the conductive portion (13).

[0107] The power feed socket 1 according to the seventh aspect can suppress misalignment between the power feed terminal 21 and the conductive part 13. As a result, the power feed socket 1 according to the seventh aspect can further improve the reliability of the electrical connection between the conductive part 13 and the power feed terminal 21.

[0108] A power feed socket (1) according to an eighth aspect of the present disclosure can be realized by combining it with any of the first to seventh aspects. In the power feed socket (1) according to the eighth aspect, the force with which the spring member (14) urges the power feed terminal (21) is preferably greater than the force applied to the power feed terminal (21) from the contact portion (13).

[0109] In the power feed socket 1 according to the eighth aspect, the force with which the spring member 14 urges the power feed terminal 21 is greater than the force applied to the power feed terminal 21 by the contact portion 13, thereby making it difficult for the contact portion 135 to separate from the power feed terminal 21. As a result, the power feed socket 1 according to the eighth aspect can further improve the reliability of the electrical connection between the conductive portion 13 and the power feed terminal 21.

[0110] A lighting device (100) according to a ninth aspect of the present disclosure includes the power supply socket (1) according to any one of the first to eighth aspects and a light source unit (2).

[0111] The lighting device (100) according to the ninth aspect includes the power supply socket (1) according to any one of the first to eighth aspects, and therefore can improve the reliability of the electrical connection between the conductive part (13) and the power supply terminal (21). [Explanation of symbols]

[0112] 1 power socket 2 Light source unit 10 Socket body (body) 13 Conductive part 14 Spring member 21 Power supply terminal 100 lighting equipment 116 Guide part 117 Restricted Section 118 Positioning part 130 Terminal section 135 Contact area 136 1st contact piece 137 Second contact piece 138 Support piece D1 First direction D2 Second direction H1 First insertion hole (insertion hole) H3 Guide hole (long hole)

Claims

1. one or more conductive parts electrically connected to a power supply terminal of the light source unit; a main body that accommodates the conductive portion; a spring member that is housed in the main body and biases the power supply terminal in a direction approaching the conductive portion, The conductive portion is a terminal portion electrically connected to an external power supply; a contact portion that comes into contact with the power supply terminal; and The contact portion is a first contact piece that contacts the power supply terminal from a first direction; a second contact piece that protrudes from a tip of the first contact piece and contacts the power supply terminal from a second direction different from the first direction; a support piece that protrudes from a rear end of the first contact piece and is supported by the terminal portion in a flexible manner; having Power supply socket.

2. the first contact piece, the second contact piece, and the support piece are integrally formed by a strip-shaped member having spring properties; The power supply socket according to claim 1.

3. In the contact portion, the first contact piece and the second contact piece are formed in a V-shape. The power supply socket according to claim 2.

4. At least a portion of the support piece is curved. The power supply socket according to any one of claims 1 to 3.

5. the main body is provided with a guide portion including one or more insertion holes into which the power supply terminals can be inserted and removed, and an elongated hole whose first end is connected to the insertion hole; the conductive portion is accommodated in the main body outside a second end of the elongated hole, which is the other end of the first end, so as not to be visible from the insertion direction of the power supply terminal into the insertion hole; The power supply socket according to any one of claims 1 to 3.

6. the main body has a limiting portion that limits displacement of the contact portion when the first contact piece and the second contact piece are in contact with the power supply terminal. The power supply socket according to any one of claims 1 to 3.

7. The main body has a positioning portion that positions the conductive portion. The power supply socket according to any one of claims 1 to 3.

8. The force with which the spring member urges the power supply terminal is greater than the force applied to the power supply terminal from the contact portion. The power supply socket according to any one of claims 1 to 3.

9. The power supply socket according to any one of claims 1 to 3; the light source unit; Equipped with Lighting equipment.

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