Feeding socket and illumination device

Abstract

To improve the electrical connection between a feeding terminal and a conducting part.SOLUTION: A feeding socket 300 comprises a first insertion part 320, a conducting part 330, and a guide part 340. The first insertion part 320 has a first insertion hole 321 into which a feeding terminal is inserted. The conducting part 330 is electrically connected to the feeding terminal. The guide part 340 guides the feeding terminal during connection operations. The guide part 340 has a guide hole 341 and a barrier part 342. The guide hole 341 is connected with the first insertion hole 321 and guides the feeding terminal from the first insertion part 320 to the conducting part 330. The barrier part 342 is provided between the first insertion part 320 and the conducting part 330 in a movement direction. The feeding terminal passes through at least the barrier part 342 to be electrically connected to the conducting part 330.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] Conventionally, lighting devices configured by mounting a lamp unit in a socket have been known. For example, Patent Document 1 discloses a socket in which a power supply terminal pin provided on the lamp unit is sandwiched between a pair of terminal portions at the end of a pin groove provided on the socket, thereby simultaneously supporting and electrically connecting the lamp unit to the socket. [Prior art documents] [Patent documents]

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

[0004] In the socket (power supply socket) described in Patent Document 1, the pair of terminal portions (conductive portions) are conductive, so even before the power supply terminal pin (power supply terminal) is held by the pair of terminal portions at the end of the pin groove, the power supply terminal pin may come into contact with the pair of terminal portions, causing the lamp unit (light source unit) to light up. Therefore, if the power supply terminal pin is used without being held by the pair of terminal portions at the end of the pin groove, the electrical connection between the power supply terminal pin and the pair of terminal portions may be weakened.

[0005] The present disclosure aims to provide a power supply socket and a lighting device that can improve the electrical connection between the power supply terminal and the conductive portion. [Means for solving the problem]

[0006] A power feed socket according to one aspect of the present disclosure is a power feed socket that feeds power to a light source unit that includes a power feed terminal. The power feed socket includes an insertion portion, a conductive portion, and a guide portion. The insertion portion has an insertion hole into which the power feed terminal is inserted. The conductive portion is electrically connected to the power feed terminal. The guide portion guides the power feed terminal during a connection operation to electrically connect the power feed terminal to the conductive portion. The guide portion includes a guide hole and a barrier portion. The guide hole is connected to the insertion hole and guides the power feed terminal from the insertion portion to the conductive portion. The barrier portion is provided between the insertion portion and the conductive portion in a movement direction in which the power feed terminal moves during the connection operation. The power feed terminal is electrically connected to the conductive portion by passing through at least the barrier portion.

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

[0008] According to the power feed socket and lighting device according to the above aspect, the electrical connection between the power feed terminal and the conductive portion can be improved. [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 a cross-sectional view of the lighting device. [Figure 3] FIG. 3 is a perspective view of a light source unit in the lighting device. [Figure 4] FIG. 4 is a front view of the power supply socket in the lighting device. [Figure 5] FIG. 5 is a rear view of the power supply socket in the lighting device. [Figure 6] FIG. 6 is a cross-sectional view of a power supply socket in the lighting device. [Figure 7]FIG. 7 is a cross-sectional view of a power supply socket in a lighting device according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] A power socket and a lighting device according to embodiments of the present disclosure will be described below with reference to the drawings. Each of the embodiments described below represents a preferred specific example of the present disclosure. Therefore, the numerical values, materials, components, component arrangements, connection configurations, processes, and process sequences shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, any components in the following embodiments that are not recited in the independent claims that represent the overall concept of the present disclosure will be described as optional components. The drawings referenced in the following embodiments are schematic and are not necessarily rigorous illustrations. In other words, the size and thickness ratios of each component in the drawings do not necessarily reflect the actual dimensional ratios.

[0011] (1) Description of the embodiment The following describes a lighting device 1 according to an embodiment. Fig. 1 is a perspective view of the lighting device 1 according to the embodiment. Fig. 2 is a cross-sectional view of the lighting device 1 according to the embodiment. The lighting device 1 is, for example, a downlight that is recessed into the ceiling of a house or the like and emits light downward, but is not limited to a downlight and may be, for example, a spotlight.

[0012] 1 and 2, the lighting device 1 includes a light source unit 10 and a fixture body 20. The lighting device 1 also includes a terminal block 30 and a pair of mounting springs 40. The fixture body 20 has an attachment member 210, a cover member 220, and a power feed socket 300. That is, the lighting device 1 includes the power feed socket 300 and the light source unit 10 that is detachably attached to the power feed socket 300. Each component of the lighting device 1 will be described in detail below.

[0013] In the following description, the front-rear, left-right, and up-down directions indicated by arrows in Fig. 1 are defined as the front-rear, left-right, and up-down directions of the lighting device 1 and its components. However, these directions are not intended to limit the directions of the lighting device 1 and its components when in use. Furthermore, the arrows indicating "front," "rear," "left," "right," "up," and "down" in Fig. 1 are merely shown for the purpose of explanation and do not have any physical substance.

[0014] (1.1) Light source unit FIG. 3 is a perspective view of the light source unit 10 in the lighting device 1 according to the embodiment. As shown in FIG. 3, the light source unit 10 has a main body 110, a plurality of (two in the illustrated example) power supply terminals 120, a protrusion 130, and a light source (not shown). The light source has, for example, one or more LEDs (Light Emitting Diodes). As shown in FIG. 2, the light source unit 10 is detachably attached to a power supply socket 300. External commercial power is input to the power supply socket 300 via a power cable. The power input to the power supply socket 300 is supplied to the light source unit 10.

[0015] The main body 110 is formed in a cylindrical shape with its axis extending in the vertical direction. The main body 110 has a base surface 111. The base surface 111 is the upper surface of the main body 110 and has a circular shape when viewed from above. As will be described later, a plurality of power supply terminals 120 and protrusions 130 are provided on the base surface 111.

[0016] 3, each of the multiple power supply terminals 120 is provided to extend upward from the base surface 111 of the main body 110. Each power supply terminal 120 is a terminal that receives power from outside the light source unit 10 to cause the light source section of the light source unit 10 to emit light. Each power supply terminal 120 receives power from the power supply socket 300 when the light source unit 10 is attached to the power supply socket 300.

[0017] Each power supply terminal 120 has a small diameter portion 121 and a large diameter portion 122. The small diameter portion 121 is a round bar-shaped portion that extends upward from the base surface 111 of the main body 110. The large diameter portion 122 is a disk-shaped portion that extends upward from the tip (upper end) of the small diameter portion 121. In a plan view from above, the diameter D2 (see FIG. 6) of the large diameter portion 122 is larger than the diameter D1 (see FIG. 6) of the small diameter portion 121. The light source unit 10 is attached to the power supply socket 300 by inserting the large diameter portion 122 of each power supply terminal 120 into a first insertion hole 321 of the power supply socket 300, which will be described later, and rotating the light source unit 10 by a predetermined angle.

[0018] The multiple power supply terminals 120 are provided at positions that are point-symmetric with respect to the center of the protrusion 130 located at the center of the base surface 111 of the main body 110. This allows the power supply socket 300 to hold the light source units 10 evenly.

[0019] As shown in FIG. 3, the protrusion 130 is provided so as to extend upward from the center of the base surface 111 of the main body 110. The protrusion 130 is inserted into a second insertion hole 351 (see FIG. 4) of the power supply socket 300, which will be described later. The protrusion 130 is formed in a cylindrical shape with its axial direction extending in the vertical direction. The protrusion 130 forms an accommodating space for accommodating, for example, a capacitor or the like, which is a circuit element of the light source unit 10. The protrusion 130 has a pair of protrusions 131. The pair of protrusions 131 are provided at positions that are point-symmetric in the radial direction of the protrusion 130.

[0020] (1.2) Device body 1 and 2, the fixture body 20 has an attachment member 210, a cover member 220, and a power supply socket 300. Each component of the fixture body 20 will be described in detail below.

[0021] (1.2.1) Mounting parts 1 and 2, the mounting member 210 is a member that is attached to the bottom and side surfaces of the cover member 220. A terminal block 30 is attached to the mounting member 210. The terminal block 30 supplies power from an external power source to the power feed socket 300.

[0022] (1.2.2) Cover member As shown in FIG. 2, the cover member 220 is a cover that covers the light source unit 10 and the like. The cover member 220 is formed in a cylindrical shape with a bottom and an open bottom. The cover member 220 functions as a mounting member to which the light source unit 10 is attached, and also functions as a heat sink (heat dissipation member) that dissipates heat generated by the light source unit 10. The cover member 220 is made of a material with high thermal conductivity, such as aluminum. The cover member 220 may also be made of an insulating resin with high thermal conductivity. This allows the cover member 220 to be lightweight while improving its insulating properties.

[0023] (1.2.3) Power socket Fig. 4 is a front view of the power feed socket 300 in the lighting device 1 according to the embodiment. Fig. 5 is a rear view of the power feed socket 300 in the lighting device 1 according to the embodiment. The power feed socket 300 is a power feed socket for feeding power to the light source unit 10 including the power feed terminal 120. As shown in Figs. 4 and 5, the power feed socket 300 includes a socket body 310 and a plurality of (two in the illustrated example) conductive parts 330.

[0024] (1.2.3.1) Socket body As shown in FIGS. 4 and 5, the socket body 310 is an outer casing of the power feeding socket 300 and is a cylindrical member large enough to accommodate multiple conductive portions 330. The socket body 310 is formed, for example, from an insulating resin material. The socket body 310 includes a main portion 311 that forms the top surface of the power feeding socket 300. The main portion 311 has an annular shape when viewed from above and below. The socket body 310 has multiple (two in the illustrated example) first insertion portions 320, multiple (two in the illustrated example) guide portions 340, and a second insertion portion 350.

[0025] Each of the multiple first insertion portions 320 has a first insertion hole 321. The first insertion hole 321 penetrates the main portion 311 of the socket body 310 in the up-down direction. The first insertion hole 321 has a circular shape in a plan view from the up-down direction. An opening length L1 of the first insertion hole 321 is longer than a diameter D2 (see FIG. 6 ) of the large diameter portion 122 of the power feeding terminal 120 of the light source unit 10. Therefore, the large diameter portion 122 of the power feeding terminal 120 can be inserted into the socket body 310 through the first insertion hole 321. In other words, the first insertion hole 321 has a size that allows the power feeding terminal 120 to be inserted therein. In this embodiment, the opening length L1 of the first insertion hole 321 is the diameter of the first insertion hole 321. In addition, in this embodiment, the first insertion portion 320 corresponds to an insertion portion, and the first insertion hole 321 corresponds to an insertion hole. That is, the power supply socket 300 includes a first insertion portion 320 having a first insertion hole 321 into which the power supply terminal 120 is inserted.

[0026] Each of the guide portions 340 has a guide hole 341. Each guide hole 341 penetrates the main portion 311 of the socket body 310 in the vertical direction. The multiple first insertion holes 321 and the multiple guide holes 341 correspond one-to-one to each other. Each guide hole 341 has an arc shape in a plan view from the vertical direction and is connected to a corresponding one of the multiple first insertion holes 321. In a plan view from the vertical direction, each guide hole 341 extends in an arc shape clockwise from the corresponding first insertion hole 321, with the center C1 of the socket body 310 as the center of symmetry. This allows the power supply terminal 120 to be inserted into the guide hole 341 by rotating the light source unit 10. Furthermore, the opening length L2 of each guide hole 341 in the intersecting direction is shorter than the opening length L1 of the corresponding first insertion hole 321 in the intersecting direction. Furthermore, the opening length L2 of each guide hole 341 is larger than the diameter D1 (see FIG. 6) of the small diameter portion 121 of the power feed terminal 120 and smaller than the diameter D2 (see FIG. 6) of the large diameter portion 122 of the power feed terminal 120. As a result, during the connection work of electrically connecting the power feed terminal 120 to the conductive part 330, the large diameter portion 122 of the power feed terminal 120 catches on the edge of the guide hole 341, so that the power feed terminal 120 is less likely to come off the power feed socket 300 and cause the light source unit 10 to fall. The intersecting direction is a direction intersecting with the movement direction in which the power feed terminal 120 moves during the connection work.

[0027] Each guide hole 341 has the function of guiding the power supply terminal 120, which is inserted through the first insertion hole 321 of the first insertion portion 320, from the first insertion portion 320 to the conductive portion 330. That is, each guide portion 340 guides the power supply terminal 120 during the connection process of electrically connecting the power supply terminal 120 to the conductive portion 330. In short, the power supply socket 300 includes guide portions 340 that guide the power supply terminal 120 during the connection process.

[0028] As shown in FIG. 6, each of the guide portions 340 further includes a barrier portion 342, a drop-off prevention portion 343, a retention portion 344, and a connection portion 345.

[0029] The barrier portion 342 is provided between the first insertion portion 320 and the guide portion 340 in the movement direction. The barrier portion 342 is also provided on both widthwise edges of the guide hole 341. The movement direction is the direction in which the power supply terminal 120 moves during the connection operation, and is a direction along the guide hole 341 of the guide portion 340. In other words, the guide hole 341 has an arc shape along the movement direction. The barrier portion 342 includes an inclined surface that slopes toward the conductive portion 330 in the insertion direction as it moves away from the retention portion 344. The insertion direction is the direction in which the power supply terminal 120 is inserted into the first insertion hole 321 of the first insertion portion 320, and is the up-down direction in this embodiment. In other words, in this embodiment, the inclined surface of the barrier portion 342 is an upward inclined surface that slopes obliquely upward as it moves away from the retention portion 344. This requires the user to consciously rotate the light source unit 10 until the power supply terminal 120 passes over the barrier portion 342, which prevents the power supply terminal 120 from being in an incomplete state (a state in which the power supply terminal 120 is not in contact with the conductive portion 330). In the power supply socket 300 according to this embodiment, the power supply terminal 120 is electrically connected to the conductive portion 330 by passing through at least the barrier portion 342. Note that the barrier portion 342 may be a wall that is perpendicular to the retention portion 344 described below.

[0030] The falling-off prevention portion 343 is provided between the first insertion hole 321 of the first insertion portion 320 and the barrier portion 342 in the movement direction. The falling-off prevention portion 343 is also provided on both widthwise edge portions of the guide hole 341. Specifically, the falling-off prevention portion 343 is provided on both peripheries of the guide hole 341 near the first insertion portion 320. The falling-off prevention portion 343 has a function of preventing the light source unit 10, with the large diameter portion 122 of the power feeding terminal 120 inserted into the socket body 310 of the power feeding socket 300, from falling off. When attaching or detaching the light source unit 10, the large diameter portion 122 of the power feeding terminal 120 passes through or comes into contact with the falling-off prevention portion 343.

[0031] The fall-off prevention portion 343 includes an inclined surface that slopes toward the conductive portion 330 in the insertion direction as it moves away from the retaining portion 344. That is, in this embodiment, the inclined surface of the fall-off prevention portion 343 slopes obliquely upward as it moves away from the retaining portion 344. Therefore, the inclination direction of the inclined surface of the barrier portion 342 and the inclination direction of the inclined surface of the fall-off prevention portion 343 are opposite directions. As a result, even if the power supply terminal 120 is used imperfectly and the light source unit 10 rotates in the opposite direction to the installation direction due to vibration or the like, the power supply terminal 120 is caught on the fall-off prevention portion 343, and therefore, it is possible to prevent the light source unit 10 from falling off the power supply socket 300.

[0032] Furthermore, the height H1 of the falling-off prevention portion 343 is a height that prevents the large diameter portion 122 of the power feeding terminal 120 from passing through due to an external factor such as vibration. For example, the height H1 of the falling-off prevention portion 343 is equal to or greater than half the height H2 of the large diameter portion 122. On the other hand, if the height H1 of the falling-off prevention portion 343 is too high, it becomes difficult to attach and detach the light source unit 10 to and from the power feeding socket 300. Therefore, it is preferable that the height H1 of the falling-off prevention portion 343 be a height that allows the light source unit 10 to be easily attached and detached to and from the power feeding socket 300.

[0033] The retaining portion 344 is provided between the detachment prevention portion 343 and the barrier portion 342 in the movement direction. Specifically, as shown in FIG. 6 , the retaining portion 344 is provided on the periphery of the guide hole 341 between the detachment prevention portion 343 and the barrier portion 342. In this embodiment, the retaining portion 344 is a flat surface located between the detachment prevention portion 343 and the barrier portion 342. When the light source unit 10 is attached or detached, the large diameter portion 122 of the power supply terminal 120 passes through or comes into contact with the retaining portion 344. When the power supply terminal 120 is released from contact with the conductive portion 330, the power supply terminal 120 moves down the barrier portion 342 due to the elastic force of the conductive portion 330 and is positioned in the retaining portion 344. When the power supply terminal 120 is positioned in the retaining portion 344, the power supply terminal 120 is not electrically connected to the conductive portion 330. In other words, when the power supply terminal 120 is positioned in the retaining portion 344, the power supply terminal 120 and the conductive portion 330 are not connected to each other. Therefore, during the above-mentioned connection work, the large diameter portion 122 of the power supply terminal 120 is not left in the retaining portion 344, and it is possible to move the large diameter portion 122 of the power supply terminal 120 to the correct position (a position where it is electrically connected to the conductive portion 330). This allows the user to notice that the power supply terminal 120 is in an incomplete state (a state where it is not electrically connected to the conductive portion 330).

[0034] The connection portion 345 is a flat surface of the guide portion 340 that is connected to the barrier portion 342. When the large diameter portion 122 of the power supply terminal 120 passes over the barrier portion 342 and reaches the connection portion 345, the power supply terminal 120 and the conductive portion 330 are electrically connected.

[0035] The second insertion portion 350 has a second insertion hole 351 and a pair of grooves 352. The second insertion hole 351 penetrates the socket body 310 in the vertical direction at the center of the socket body 310. The second insertion hole 351 has a circular shape when viewed from above. That is, the socket body 310 has an annular (donut-like) shape when viewed from above. As described above, the protrusion 130 of the light source unit 10 is inserted into the second insertion hole 351 of the second insertion portion 350. Therefore, the inner diameter of the second insertion hole 351 is larger than the outer diameter of the protrusion 130. Furthermore, it is desirable that the height of the second insertion portion 350 is larger than the height of the protrusion 130. The pair of grooves 352 are provided at positions point-symmetrical with respect to the center of the second insertion hole 351. A corresponding one of the multiple protrusions 131 is inserted into each of the pair of grooves 352.

[0036] As shown in Fig. 4, the two first insertion portions 320 are provided in the main portion 311 of the socket body 310 at positions that are point-symmetrical with respect to the center C1 of the socket body 310. Also, as shown in Fig. 4, the two guide portions 340 are provided in the main portion 311 of the socket body 310 at positions that are point-symmetrical with respect to the center C1 of the socket body 310. This allows the support points of the light source units 10 in the power feeding socket 300 to be evenly distributed, enabling the power feeding socket 300 to hold the light source units 10 evenly.

[0037] (1.2.3.2) Conductive parts 5, each of the plurality of conductive portions 330 is an elastic plate-like member. Each conductive portion 330 is arranged along a corresponding one of the plurality of guide holes 341 so as to cover the corresponding guide hole 341. Specifically, each conductive portion 330 overlaps a part of the corresponding guide hole 341 in a plan view from the top and bottom direction. Each conductive portion 330 comes into contact with a corresponding power supply terminal 120, thereby becoming electrically connectable to the corresponding power supply terminal 120.

[0038] 6 is a cross-sectional view of the power feed socket 300 in the lighting device 1 according to the embodiment. As shown in FIG. 6, each conductive portion 330 has a bent portion 331. The bent portion 331 in each conductive portion 330 protrudes downward in a V-shape. In the lighting device 1 according to the embodiment, the bent portion 331 in each conductive portion 330 of the power feed socket 300 makes line contact in the vertical direction with the large diameter portion 122 of the corresponding power feed terminal 120 of the light source unit 10, thereby supplying power from each conductive portion 330 to the corresponding power feed terminal 120. When the large diameter portion 122 of the corresponding power feed terminal 120 reaches the connection portion 345, each conductive portion 330 becomes electrically connectable to the large diameter portion 122.

[0039] (1.3) Overall structure Next, the overall configuration of the lighting device 1 configured as above will be described in detail.

[0040] 1 and 2, the light source unit 10 is inserted into the power feed socket 300 from below and electrically connected to the power feed socket 300. At this time, the protrusion 130 of the light source unit 10 is inserted into the second insertion portion 350 of the power feed socket 300. At this time, the power feed terminal 120 of the light source unit 10 is inserted into the first insertion portion 320 of the power feed socket 300 and moves along the guide portion 340 to a position where it contacts the conductive portion 330. The cover member 220 covers the periphery of the power feed socket 300 and the light source unit 10. The attachment member 210 covers the side and bottom surfaces of the cover member 220. In this embodiment, the diameter of the light source unit 10 is approximately the same as the diameter of the power feed socket 300.

[0041] (1.4) How to install the light source unit Next, a detailed description will be given of a method for attaching the light source unit 10 to the power feed socket 300 configured as described above. The attachment method according to this embodiment includes an insertion step, a rotation step, and a connection step. The insertion step is a step of inserting the power feed terminal 120 of the light source unit 10 into the first insertion portion 320 of the power feed socket 300. The rotation step is a step of rotating the light source unit 10 relative to the power feed socket 300. The connection step is a step of connecting the power feed terminal 120 of the light source unit 10 to the conductive portion 330 of the power feed socket 300.

[0042] (1.4.1) Insertion process First, the protrusion 130 of the light source unit 10 is inserted into the second insertion hole 351 of the second insertion portion 350 of the power feed socket 300. At the same time, the power feed terminal 120 of the light source unit 10 is inserted into the first insertion hole 321 of the first insertion portion 320 of the power feed socket 300.

[0043] (1.4.2) Rotation process Next, the light source unit 10 is rotated clockwise relative to the power feed socket 300 in a plan view from below. As a result, the power feed terminal 120 moves from the first insertion hole 321 of the first insertion portion 320 to the guide hole 341 of the guide portion 340. The power feed terminal 120 then moves down the inclined surface of the fall-off prevention portion 343 toward the conductive portion 330 and reaches the retention portion 344. The power feed terminal 120 then passes through the retention portion 344 and moves up the inclined surface of the barrier portion 342 toward the conductive portion 330, reaching the connection portion 345. In other words, the power feed terminal 120 is electrically connected to the conductive portion 330 by at least passing through the barrier portion 342. This requires the user to consciously rotate the light source unit 10 until the power feed terminal 120 passes over the barrier portion 342, which prevents the power feed terminal 120 from becoming incomplete and, as a result, prevents the light source unit 10 from falling off the power feed socket 300.

[0044] (1.4.3) Connection process Through the above-described rotation process, the power supply terminal 120 reaches the connection portion 345 of the guide portion 340, which is electrically connectable to the conductive portion 330. The power supply terminal 120 is able to supply power to the light source unit 10 by contacting the conductive portion 330, and the power supply terminal 120 is held in the power feed socket 300. Specifically, the large diameter portion 122 of the power supply terminal 120 is in line contact with the bent portion 331 of the conductive portion 330, and is thereby sandwiched (held) between the conductive portion 330 and the connection portion 345.

[0045] (1.5) Function of the power socket Next, the function of the power supply socket 300 configured as above will be described in detail.

[0046] (1.5.1) Function of the barrier First, the function of the barrier portion 342 will be described. Unless the power feed terminal 120 reaches an appropriate connection position (for example, the connection portion 345 of the guide portion 340), it will not come into contact with the conductive portion 330 and will not be able to obtain power. By providing the barrier portion 342 in front of the connection portion 345, which is the appropriate connection position, the user must consciously rotate the light source unit 10 until the power feed terminal 120 passes the barrier portion 342. This prevents the power feed terminal 120 from becoming incomplete (a state in which the large diameter portion 122 of the power feed terminal 120 is not at the connection portion 345). Furthermore, because the barrier portion 342 is an upwardly inclined surface, if the power feed terminal 120 is in an incomplete state, the power feed terminal 120 will move to the retention portion 344, allowing the user to notice that the power feed terminal 120 is in an incomplete state. Furthermore, when the power supply terminal 120 is positioned in the retention portion 344 or the barrier portion 342, the power supply terminal 120 is not electrically connected to the conductive portion 330, so the user can notice that the power supply terminal 120 is in an incomplete state.

[0047] (1.5.2) Function of the fall prevention part Next, the function of the fall-off prevention portion 343 will be described. The fall-off prevention portion 343 includes an upwardly inclined surface from the retaining portion 344 toward the first insertion portion 320. Therefore, in order for the large diameter portion 122 of the power feed terminal 120 to fall out of the first insertion hole 321, the large diameter portion 122 of the power feed terminal 120 needs to move diagonally upward (against gravity). Therefore, due to external factors such as vibration, it is difficult for the large diameter portion 122 of the power feed terminal 120 to reach the first insertion portion 320, and therefore the light source unit 10 is unlikely to fall out of the power feed socket 300.

[0048] (1.6) Action and Effect Next, the effects of the power supply socket 300 configured as above will be described.

[0049] The power feed socket 300 according to the embodiment includes a first insertion portion 320 having a first insertion hole 321 into which the power feed terminal 120 of the light source unit 10 is inserted, a conductive portion 330 electrically connected to the power feed terminal 120, and a guide portion 340 that guides the power feed terminal 120 during the connection work. The guide portion 340 includes a guide hole 341 that is connected to the first insertion hole 321 and guides the power feed terminal 120 from the first insertion portion 320 to the conductive portion 330, and a barrier portion 342 that is provided between the first insertion portion 320 and the conductive portion 330 in the movement direction during the connection work. The power feed terminal 120 is electrically connected to the conductive portion 330 by passing through at least the barrier portion 342.

[0050] According to the above configuration, since the barrier portion 342 is provided in front of the appropriate connection position (connection portion 345), the user needs to consciously rotate the light source unit 10 until the power supply terminal 120 passes the barrier portion 342, which prevents the power supply terminal 120 from becoming incomplete. As a result, it is possible to improve the electrical connection between the power supply terminal 120 and the conductive portion 330. In addition, it is possible to prevent the light source unit 10 from falling off the power supply socket 300.

[0051] In the power feeding socket 300, the guide portion 340 further includes a fall-off prevention portion 343 that prevents the power feeding terminal 120 from falling off, and a retaining portion 344 that is provided between the fall-off prevention portion 343 and the barrier portion 342. When the power feeding terminal 120 is positioned in the retaining portion 344, the power feeding terminal 120 and the conductive portion 330 are not electrically connected.

[0052] According to the above configuration, when the power supply terminal 120 is positioned in the retention section 344 or the barrier section 342, the power supply terminal 120 and the conductive section 330 are not electrically connected, so the user can notice that the power supply terminal 120 is in an incomplete state.

[0053] Furthermore, in the power feeding socket 300, the barrier portion 342 includes an inclined surface that is inclined so as to approach the conductive portion 330 in the insertion direction as it moves away from the retention portion 344.

[0054] According to the above configuration, since the barrier portion 342 includes the inclined surface, if the power supply terminal 120 is in an incomplete state, the power supply terminal 120 will move to the retention portion 344, and the user will be able to notice that the power supply terminal 120 is in an incomplete state.

[0055] The guide hole 341 has an arc shape along the movement direction. An opening length L2 of the guide hole 341 in the intersecting direction is shorter than an opening length L1 of the first insertion hole 321 in the intersecting direction.

[0056] According to the above configuration, by rotating the light source unit 10, the power supply terminal 120 can be inserted into the guide hole 341. Furthermore, since the diameter D2 of the large diameter portion 122 of the power supply terminal 120 is smaller than the opening length L1 of the first insertion hole 321 and larger than the opening length L2 of the guide hole 341, there is an advantage that the power supply terminal 120 is less likely to fall out of the guide hole 341.

[0057] Even when the guide portion 340 does not have the retaining portion 344, by providing the barrier portion 342 on the guide portion 340, the user needs to consciously rotate the light source unit 10 until the power supply terminal 120 passes the barrier portion 342. This makes it possible to prevent the power supply terminal 120 from becoming incomplete, thereby improving the electrical connection between the power supply terminal 120 and the conductive portion 330 and preventing the light source unit 10 from falling off the power supply socket 300. Therefore, the guide portion 340 does not need to have the retaining portion 344.

[0058] Even if the guide portion 340 is not provided with the fall-off prevention portion 343, by providing the barrier portion 342 on the guide portion 340, the user needs to consciously rotate the light source unit 10 until the power supply terminal 120 passes the barrier portion 342. This makes it possible to prevent the power supply terminal 120 from becoming incomplete, thereby improving the electrical connection between the power supply terminal 120 and the conductive portion 330 and preventing the light source unit 10 from falling off from the power supply socket 300. Therefore, the guide portion 340 does not need to be provided with the fall-off prevention portion 343.

[0059] (1.7) Variations The configuration of the present disclosure has been described above based on the embodiments, but the present disclosure is not limited to the above embodiments. Furthermore, the materials, values, etc. described in the above embodiments are preferred examples and are not intended to be limiting. Furthermore, the configuration of the power supply socket 300 can be modified as appropriate without departing from the scope of the technical concept of the present disclosure.

[0060] The barrier portion 342 may be an inclined surface that slopes away from the conductive portion 330 as it moves away from the retention portion 344. In other words, the barrier portion 342 may be an inclined surface that slopes downward from the retention portion 344 toward the conductive portion 330.

[0061] 7 is a cross-sectional view of a power feeding socket 300 in a lighting device 1 according to a modified example. As shown in FIG. 7, the conductive portion 330 may be configured to supply power by contacting the large diameter portion 122 of the power feeding terminal 120 from the radial direction of the socket body 310.

[0062] Furthermore, the power feed socket 300 may be provided with a guide portion 340 in which the barrier portion 342 is a downwardly sloping surface from the retaining portion 344 toward the conductive portion 330, and the fall-off prevention portion 343 is an upwardly sloping surface from the retaining portion 344 toward the first insertion portion 320. This allows the large diameter portion 122 of the power feed terminal 120 to be electrically connected to the conductive portion 330 at a position lower (below) than the first insertion hole 321. Therefore, in order for the large diameter portion 122 of the power feed terminal 120 to fall out through the first insertion hole 321, the large diameter portion 122 needs to move obliquely upward (against gravity). This has the advantage that the large diameter portion 122 is less likely to fall out of the power feed socket 300.

[0063] Furthermore, bent portion 331 of conductive portion 330 is V-shaped and is in line contact with large diameter portion 122, but bent portion 331 may be convex and in surface contact with large diameter portion 122. This reduces poor conduction between conductive portion 330 and large diameter portion 122 and also improves the holding force of conductive portion 330 against large diameter portion 122.

[0064] The shape of the first insertion hole 321 of the first insertion portion 320 is not limited to a circle, but may be a polygon. For example, the shape of the first insertion hole 321 may be a rectangle.

[0065] (Aspect) The power feed socket (300) according to the first aspect is a power feed socket (300) that feeds power to a light source unit (10) that includes a power feed terminal (120). The power feed socket (300) includes an insertion portion (320), a conductive portion (330), and a guide portion (340). The insertion portion (320) has an insertion hole (321) into which the power feed terminal (120) is inserted. The conductive portion (330) is electrically connected to the power feed terminal (120). The guide portion (340) guides the power feed terminal (120) during the connection process for electrically connecting the power feed terminal (120) to the conductive portion (330). The guide portion (340) includes a guide hole (341) and a barrier portion (342). The guide hole 341 is connected to the insertion hole 321 and guides the power supply terminal 120 from the insertion section 320 to the conductive section 330. The barrier section 342 is provided between the insertion section 320 and the conductive section 330 in the movement direction of the power supply terminal 120 during the connection work. The power supply terminal 120 is electrically connected to the conductive section 330 by passing through at least the barrier section 342.

[0066] According to the power feed socket (300) of the above aspect, the barrier portion (342) is provided in front of the appropriate connection position, so that the user needs to consciously operate the light source unit (10) until the power feed terminal (120) passes the barrier portion (342). This makes it possible to prevent the power feed terminal (120) from becoming incomplete, thereby improving the electrical connection between the power feed terminal (120) and the conductive portion (330).

[0067] In the power feed socket (300) according to the second aspect, the guide portion (340) of the first aspect further includes a fall-off prevention portion (343) and a retaining portion (344). The fall-off prevention portion (343) is provided between the insertion hole (321) and the barrier portion (342) in the movement direction and prevents the power feed terminal (120) from falling off. The retaining portion (344) is provided between the fall-off prevention portion (343) and the barrier portion (342) in the movement direction. When the power feed terminal (120) is positioned in the retaining portion (344), the power feed terminal (120) and the conductive portion (330) are not electrically connected.

[0068] According to the power supply socket (300) of the above aspect, when the power supply terminal (120) is positioned in the retention portion (344) or the barrier portion (342), the power supply terminal (120) and the conductive portion (330) are not electrically connected, so the user can notice that the power supply terminal (120) is in an incomplete state.

[0069] In the power supply socket (300) according to the third aspect, in the second aspect, the barrier portion (342) includes an inclined surface that inclines toward the conductive portion (330) in the insertion direction, which is the direction in which the power supply terminal (120) is inserted into the insertion hole (321), as it moves away from the retention portion (344).

[0070] In the power feed socket (300) according to the above aspect, the barrier portion (342) includes an inclined surface that slopes toward the conductive portion (330), so that the power feed terminal (120) becomes defective when it moves to the retention portion (344). This allows the user to notice that the power feed terminal (120) is defective.

[0071] In the power supply socket (300) according to the fourth aspect, in the second aspect, the barrier portion (342) includes an inclined surface that inclines so as to move away from the conductive portion (330) in the insertion direction, which is the direction in which the power supply terminal (120) is inserted into the insertion hole (321), as the barrier portion (342) moves away from the retention portion (344).

[0072] According to the power feed socket (300) of the above aspect, the power feed terminal (120) is unlikely to fall off the insertion portion (320), and therefore, the light source unit (10) can be prevented from falling off.

[0073] In the power socket (300) according to a fifth aspect, in any one of the first to fourth aspects, the guide hole (341) has an arc shape along the movement direction. An opening length (L2) of the guide hole (341) in a cross direction intersecting the movement direction is shorter than an opening length (L1) of the insertion hole (321) in the cross direction.

[0074] The power supply socket (300) according to the above aspect has the advantage that the power supply terminal (120) is less likely to fall out of the guide hole (341).

[0075] The lighting device (1) according to a sixth aspect includes the power feed socket (300) according to any one of the first to fifth aspects, and a light source unit (10) detachably attached to the power feed socket (300).

[0076] According to the lighting device (1) of the above aspect, the power supply socket (300) is provided, which improves the electrical connection between the power supply terminal (120) and the conductive portion (330). [Explanation of symbols]

[0077] 1. Lighting equipment 10 Light source unit 120 Power supply terminal 300 power socket 320 First insertion part (insertion part) 321 First insertion hole (insertion hole) 330 Conductive part 340 Guide part 341 Guide hole 342 Barrier 343 Fall-off control section 344 Retention part L1, L2 opening length

Claims

1. A power supply socket for supplying power to a light source unit having a power supply terminal, an insertion portion having an insertion hole into which the power supply terminal is inserted; a conductive portion electrically connected to the power supply terminal; a guide portion that guides the power supply terminal during a connection operation for electrically connecting the power supply terminal to the conductive portion, The guide portion is a guide hole connected to the insertion hole and guiding the power supply terminal from the insertion portion to the conductive portion; a barrier portion provided between the insertion portion and the conductive portion in a movement direction in which the power supply terminal moves during the connection work, the power supply terminal is electrically connected to the conductive portion by passing through at least the barrier portion; Power supply socket.

2. The guide portion is a fall-off prevention portion provided between the insertion hole and the barrier portion in the movement direction and configured to prevent the power supply terminal from falling off; a retention portion provided between the fall-off prevention portion and the barrier portion in the movement direction, When the power supply terminal is positioned in the retention portion, the power supply terminal and the conductive portion are not electrically connected to each other. The power supply socket according to claim 1.

3. the barrier portion includes an inclined surface that is inclined so as to approach the conductive portion in an insertion direction that is a direction in which the power supply terminal is inserted into the insertion hole as the barrier portion moves away from the retention portion, The power supply socket according to claim 2.

4. the barrier portion includes an inclined surface that is inclined so as to move away from the conductive portion in an insertion direction that is a direction in which the power supply terminal is inserted into the insertion hole as the barrier portion moves away from the retention portion, The power supply socket according to claim 2.

5. the guide hole has an arc shape along the movement direction, an opening length of the guide hole in a cross direction that is a direction crossing the movement direction is shorter than an opening length of the insertion hole in the cross direction; The power supply socket according to any one of claims 1 to 4.

6. The power supply socket according to any one of claims 1 to 4, The light source unit is detachably attached to the power supply socket. Lighting equipment.

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