JP5445782B2 - Socket and lighting device - Google Patents

Description

  FIELD Embodiments described herein relate generally to a socket for connecting a straight tube lamp having a shaft portion at one end and a connecting portion having an elliptical cross section at the tip of the shaft portion, and a lighting device using the socket.

  In general, there are many illuminating devices using a straight tube fluorescent lamp having G13 type caps at both ends from which a pair of lamp pins having a circular cross section project, and a socket for a straight tube fluorescent lamp to which the straight tube fluorescent lamp is connected. It is used.

  In such a straight tube fluorescent lamp socket, the lamp pins at both ends of the straight tube fluorescent lamp are inserted from the end surfaces of a pair of sockets, and are rotated by rotating around the tube axis of the straight tube fluorescent lamp. There is a rotating mounting type.

  In addition, a straight tube lamp using a low power consumption and long-life LED element has been proposed as a light source that can be used in an existing lighting device instead of a straight tube fluorescent lamp.

  This straight tube lamp has the same tube length as that of the straight tube fluorescent lamp, and is provided with a G13-type base in which a pair of base pins having the same circular section as the straight tube fluorescent lamp protrudes at both ends. Similar to the tube fluorescent lamp, it can be mounted between a pair of sockets provided in an existing lighting fixture.

  However, since the straight tube lamp uses a G13 type base that is compatible with the straight tube fluorescent lamp, the straight tube lamp is mistakenly attached to an illumination device equipped with a lighting circuit for the straight tube fluorescent lamp. There is a risk that the straight tube fluorescent lamp may be mounted or the straight tube fluorescent lamp may be erroneously mounted on a lighting device equipped with a lighting circuit for a straight tube lamp.

JP 2003-100402 A Utility Model Registration No. 3152509

  In order to prevent erroneous mounting of a straight tube lamp, for example, a ground pin is projected at one end of a straight tube lamp, and a pair of lamp pins for power feeding is projected at the other end. It is conceivable to eliminate the compatibility with the tube fluorescent lamp.

  When the ground pin of such a straight tube lamp is mounted in a rotary mounting type socket, the ground pin can be rotated even if the ground pin is not inserted to a predetermined insertion position of the socket because there is only one ground pin. Conceivable. In that case, there is a possibility that the connection between the ground pin and the ground terminal arranged in the socket cannot be made reliably, or the ground pin falls off from the socket.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a socket capable of reliably connecting the ground pin and the ground terminal and preventing the ground pin from falling off, and an illumination device using the socket. And

  The socket of the embodiment includes a socket body provided with a ground pin mounting opening on the front surface and an insertion groove extending from a front end surface intersecting the front surface to the ground pin mounting opening on the front surface. Then, the ground pin of the straight tube lamp is inserted from the insertion groove on the front end surface of the socket body, the shaft portion of the ground pin is inserted from the insertion groove on the front surface of the socket body into the ground pin mounting opening, and the ground pin is inserted into the tube of the straight tube lamp. Rotate around the shaft and attach to the socket. Further, the socket allows rotation of the ground pin with the shaft portion inserted into the ground pin mounting opening of the socket body, and the ground pin in a state positioned in the insertion groove before the shaft portion is inserted into the ground pin mounting opening of the socket body. A rotation restricting portion for restricting rotation is provided.

  According to the present invention, since the rotation restricting portion restricts the rotation of the ground pin in a state where the shaft portion is positioned in the insertion groove before the shaft portion is inserted into the ground pin mounting opening of the socket body, the ground pin is inserted into the ground pin mounting opening of the socket body. It is possible to prevent the ground pin from being attached when the shaft part of the socket is not securely inserted or obliquely inserted, and the correct insertion position where the shaft part of the ground pin is inserted into the ground pin attachment opening of the socket body By allowing the rotation of the ground pin only with, it can be expected that the connection between the ground pin and the ground terminal can be ensured and the ground pin can be prevented from falling off the socket body.

It is sectional drawing of the socket for earth | grounding which shows 1st Embodiment. It is sectional drawing of the lamp pin mounting state of the socket for grounding same as the above. It is a perspective view of a part of socket for earthing and a straight tube type lamp same as the above. It is a perspective view of the decomposition | disassembly state of the socket for earth | ground same as the above. It is a front view of the socket for electric power feeding same as the above. It is a perspective view of a straight tube | pipe type lamp same as the above. It is a side view of the illuminating device using the socket for earth | ground and the socket for electric power feeding same as the above. It is a perspective view of an illuminating device same as the above. It is sectional drawing of the socket for earth | grounding which shows 2nd Embodiment. It is a perspective view of the ground terminal of the socket for earth | ground which shows 3rd Embodiment. It is sectional drawing of the socket for earth | ground same as the above. The earthing | grounding socket which shows 4th Embodiment is shown, (a) is sectional drawing of the state which inserted the earth pin, (b) is sectional drawing of the state which rotated the earthing pin to the attachment position.

  Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 8.

  As shown in FIG. 8, the illuminating device 11 includes a luminaire 12 that is an embedded luminaire of the type for two straight tube fluorescent lamps, and two straight tube lamps 13 used in the luminaire 12. I have.

  The luminaire 12 is an elongated lower fixture body 15 that is embedded in the ceiling surface, and is opposed to both ends of the fixture body 15 in the longitudinal direction. Two sets of sockets 16 and 17 (socket 16 is shown in FIG. 7), and a lighting device 18 which is disposed on the instrument body 15 and is a dedicated power source for lighting the straight tube lamp 13. The socket 16 on one end side where the one end side of the straight tube lamp 13 is mounted is for grounding, and the socket 17 on the other end side where the other end side of the straight tube lamp 13 is mounted is for power feeding.

  As shown in FIG. 6, the straight tube lamp 13 includes a translucent cover 21 having a tube length and a tube diameter similar to those of a straight tube fluorescent lamp and formed in substantially the same appearance as the straight tube fluorescent lamp. The light source unit 22 accommodated in the transparent cover 21 and the caps 23 and 24 provided at both ends of the translucent cover 21 are provided. The cap 23 on one end side of the straight tube lamp 13 is for grounding that is mounted on the socket 16 for grounding, and the cap 24 on the other end side of the straight tube lamp 13 is for power feeding that is mounted on the socket 17 for power feeding. It is.

  The light source unit 22 includes a plurality of substrates 26 on which a plurality of semiconductor light emitting elements 25 such as LED elements and EL elements are mounted, and a mounting plate 27 to which these substrates 26 are attached. In the case of an LED element, the semiconductor light emitting element 25 uses an SMD (Surface Mount Device) package with a connection terminal on which an LED chip is mounted. In this SMD package, for example, an LED chip that emits blue light is arranged in the package, and this LED chip is mixed with a yellow phosphor that emits yellow light by being excited by a part of the blue light from the LED chip. Sealed with a phosphor layer such as silicone resin. Therefore, the surface of the phosphor layer becomes a light emitting surface, and white light is emitted from this light emitting surface.

  As shown in FIG. 3, one (one) ground pin 28 projects from the end face of the grounding base 23 from the center of the tube axis of the end face. The ground pin 28 has a cylindrical shaft portion 29 protruding from the base 23 and an elliptical (oval-shaped) connection portion 30 provided at the tip of the shaft portion 29. Both ends in the longitudinal direction of the connecting portion 30 are formed in arcuate surfaces. As shown in FIG. 1, when the diameter of the shaft portion 29 is a, the dimension in the short direction of the connecting portion 30 is b, and the length in the longitudinal direction of the connecting portion 30 is c, the dimensional relationship of a <b <c. It is in. As a specific example of the dimension of the connection part 30, the dimension b in the short direction of the connection part 30 is 4 mm, and the dimension c in the longitudinal direction of the connection part 30 is 8 mm.

  As shown in FIGS. 6 and 7, a pair of power supply lamp pins 31 protrude from the end face of the power supply base 24.

  In the straight tube lamp 13, the longitudinal direction of the connection portion 30 of the ground pin 28 is aligned with the direction in which the pair of lamp pins 31 are aligned, and the surface parallel to these directions and the semiconductor light emitting element of the light source unit 22 25 light emitting surfaces are provided in parallel. That is, it is provided so that light from the light emitting surface of the semiconductor light emitting element 25 of the light source unit 22 can be irradiated in a predetermined irradiation direction in a state where the straight tube lamp 13 is correctly mounted between the sockets 16 and 17.

  As shown in FIG. 7, the sockets 16, 17 are inserted into the ground pins 28 and the lamp pins 31 from the front end surfaces of the sockets 16, 17 and rotated by, for example, 90 ° about the tube axis of the straight tube lamp 13. A rotational mounting type that is mounted at the mounting position is used.

  Next, FIGS. 1 to 4 show a socket 16 for grounding. The socket 16 includes a socket body 41 and a pair of ground terminals 42 disposed in the socket body 41. Hereinafter, with respect to the socket 16, the side attached to the instrument body 15 is referred to as the base end, and the opposite side is referred to as the front end, the surface facing the end surface of the straight tube lamp 13 is the front surface, the opposite side is the back surface, and the front surface. The space between the back surface is called the outer surface.

  The socket body 41 is made of an insulating synthetic resin, and includes a case 45 having a back surface opened and a cover 46 attached to the back surface of the case 45.

  At the base end of the case 45, a mounting portion 47 that is attached to the instrument body 15 is provided. A substantially circular ground pin mounting opening 48 is formed on the front surface of the case 45, and the front surface from the front end surface that is the front end of the outer surface of the case 45 to the front surface. An insertion groove 49 communicating with the ground pin mounting opening 48 is formed.

  A regulation wall 50 constituting both side walls of the insertion groove 49 is formed from both side edges of the insertion groove 49 on the distal end surface of the case 45 toward the inside of the case 45. The facing distance d between the regulation walls 50 on both sides is formed to be larger than the dimension b in the short direction of the connection part 30 of the ground pin 28 and smaller than the dimension c in the longitudinal direction of the connection part 30. Further, in the case 45, wall portions 51 are formed on the outer sides of the regulating walls 50 on both sides.

  The space between the insertion groove 49 on the front surface of the case 45 and the ground pin mounting opening 48 is narrower than the diameter of the shaft portion 29 of the ground pin 28, and the ground pin 28 between the insertion groove 49 and the ground pin mounting opening 48 is A narrow portion 52 that provides resistance to movement of the shaft portion 29 is provided. The narrow portion 52 is formed in a mountain shape protruding into the insertion groove 49, and a slit 53 is formed on the front surface of the case 45 outside the narrow portion 52. When the shaft portion 29 of the ground pin 28 passes through the narrow portion 52, the narrow portion 52 is elastically deformed to the outside of the insertion groove 49, and the shaft portion 29 of the ground pin 28 passes through the narrow portion 52. Allow.

  In the case 45, a pair of ground terminal holding portions 54 for holding the base end sides of the pair of ground terminals 42 are formed, and an earth terminal holding portion 55 for holding the distal end sides of the pair of ground terminals 42 is formed. Has been. The ground terminal holding part 55 is composed of a regulation wall 50 and a wall part 51. A ground wire insertion hole 56 communicating with each ground terminal holding portion 54 is formed at the base end of the case 45.

  The front surface of the cover 46 is formed with a plurality of locking portions 57 that are locked to the case 45 in a state in which the back surface of the case 45 is closed, and a plurality of holdings that position and hold the ground terminals 42 with the case 45. A protrusion 58 is provided.

  The ground terminal 42 is formed by a conductive leaf spring. The ground wire connecting portion 61 disposed on the ground terminal holding portion 54 on the proximal end side of the case 45 and the ground terminal holding on the distal end side of the case 45 are provided. A distal end portion 62 disposed in the portion 55 and a terminal piece portion 63 connected to the ground pin 28 between the ground wire connecting portion 61 and the distal end portion 62 are formed. The pair of ground terminals 42 are arranged in the case 45 so that the terminal piece 63 extends along both sides of the insertion groove 49 in the case 45.

  The ground wire connection 61 is electrically connected to the ground hole 64 through which the ground wire inserted from the ground wire insertion hole 56 is inserted, and the ground wire inserted through the insertion hole 64 and prevents the ground wire from coming off. A locking piece 65 is provided.

  The distal end portion 62 is bent in a substantially L shape from the distal end of the terminal piece portion 63 facing the insertion groove 49 on the distal end surface of the socket body 41 toward the outer side of the insertion groove 49.

  The terminal piece 63 is formed with a ground pin holding portion 66 whose surface facing the insertion groove 49 is recessed. The ground pin holding portion 66 is formed in a recess having a substantially V-shaped cross section composed of a pair of inclined surfaces 67. As shown in FIG. 2, the peripheral surface of the connection portion 30 of the ground pin 28 rotated to a predetermined mounting position. The two points of the pair of inclined surfaces 67 are configured to contact each other.

  The terminal piece 63 is formed with a regulating piece 68 that is bent from the distal end side of the ground pin holding portion 66 toward the outside opposite to the insertion groove 49. This restricting piece 68 abuts against the wall 51 of the case 45 and restricts the terminal piece 63 from being elastically deformed outside the insertion groove 49.

  As shown in FIG. 1, in the terminal piece portion 63 of the pair of ground terminals 42, the facing interval e at the distal end side of the terminal piece portion 63 and closer to the entrance side of the insertion groove 49 than the ground pin holding portion 66 is The dimension is set to be smaller than the dimension b in the short direction of the connecting portion 30 of the earth pin 28. The terminal piece 63 of the pair of ground terminals 42 is elastically deformed outside the insertion groove 49, thereby allowing the connection portion 30 of the ground pin 28 to pass.

  Then, the regulation wall 50 located on both sides of the insertion groove 49 of the case 45 and the tip side of the pair of ground terminals 42 allow rotation of the ground pin 28 with the shaft portion 29 inserted into the ground pin mounting opening 48, and the ground pin is mounted. A rotation restricting portion 71 that restricts the rotation of the ground pin 28 in a state of being positioned in the insertion groove 49 before the shaft portion 29 is inserted into the opening 48 is configured.

  As shown in FIG. 5, the power supply socket 17 includes a socket body 74, a rotor 75 that is rotatably disposed in the socket body 74, and a pair of power supply terminals 76 that are disposed in the socket body 74. It has.

  The socket body 74 is formed with a circular opening 74a in which the rotor 75 is rotatably arranged on the front surface, and an insertion groove 74b through which the pair of lamp pins 31 are inserted from the front end surface to the front opening 74a. Is formed. The rotor 75 is also formed with an insertion groove 75a into which the pair of lamp pins 31 are inserted.

  Then, the pair of lamp pins 31 of the straight tube lamp 13 are inserted into the insertion groove 74b and the insertion groove 75a of the rotor 75 from the front end surface of the socket body 74, and the straight tube lamp 13 is rotated by 90 ° about its tube axis. By doing so, the pair of lamp pins 31 come into contact with the pair of power supply terminals 76 in the middle of the rotation, and the pair of power supply terminals 76 are elastically deformed outward and mounted at a predetermined mounting position.

  Further, the lighting device 18 shown in FIG. 8 receives a commercial AC power supply, converts AC power into DC power, and converts the DC power into a pair of power supply terminals 76 of a power supply socket 17 and a pair of straight tube lamps 13. Is supplied to the light source unit 22 through the lamp pin 31.

  Next, when the straight tube lamp 13 is connected in the illuminating device 11 configured as described above, the ground pin 28 and the lamp pin 31 of the straight tube lamp 13 are connected to the sockets 16 and 17 as shown in FIG. The straight tube lamp 13 is inserted between the front end surfaces, the straight tube lamp 13 is arranged between the sockets 16 and 17, and the straight tube lamp 13 is rotated by 90 ° about the tube axis of the straight tube lamp 13, so that the straight tube lamp 13 is inserted into the socket 16, Wear between 17.

  As shown in FIG. 1, the ground pin 28 of the straight tube lamp 13 is inserted into the insertion groove 49 with the longitudinal direction of the connecting portion 30 directed to the insertion groove 49 on the distal end surface of the case 45.

  When the connection portion 30 of the earth pin 28 is inserted into the insertion groove 49 from the front end surface of the case 45, first, at the entrance portion of the insertion groove 49, the connection portion 30 contacts the pair of ground terminals 42 and the ground pin 28 is connected to the ground. Connection is made immediately. At this time, in the power supply socket 17, the lamp pin 31 does not come into contact with the power supply terminal 76 simply by inserting the power supply lamp pin 31 of the straight tube lamp 13 into the power supply socket 17.

  When the connecting portion 30 of the earth pin 28 is further inserted into the insertion groove 49, the connecting portion 30 of the earth pin 28 is elastically deformed outwardly by the connecting portion 30 of the earth pin 28, while the connecting portion 30 of the earth pin 28 becomes the pair of earth terminals 42. It is inserted in between.

  When the connecting portion 30 of the earth pin 28 is further inserted into the insertion groove 49, the shaft portion 29 of the ground pin 28 comes into contact with the pair of narrow portions 52 of the case 45, and resistance to insertion of the ground pin 28 is applied. When the ground pin 28 is further inserted against this resistance, the shaft 29 of the ground pin 28 elastically deforms the pair of narrow portions 52 of the case 45 outward while the shaft 29 of the ground pin 28 The pair of narrow portions 52 is passed over and fitted into the ground pin mounting opening 48 of the case 45. When the shaft portion 29 of the earth pin 28 is fitted into the ground pin mounting opening 48 of the case 45, the insertion of the ground pin 28 is restricted and the insertion position is positioned, and a pair of the ground pin 28 opposite to the insertion direction of the shaft portion 29 is positioned. The narrow portion 52 is in contact, and the shaft portion 29 of the ground pin 28 is held in a state of being fitted into the ground pin mounting opening 48 of the case 45. Therefore, it is easy for an operator to grasp that the ground pin 28 of the straight tube lamp 13 has been inserted to the predetermined insertion position of the socket 16, and the ground pin 28 of the straight tube lamp 13 is displaced from the predetermined insertion position of the socket 16. Can be prevented.

  When the ground pin 28 of the straight tube lamp 13 is inserted to a predetermined insertion position of the socket 16, the ground pin 28 is disposed between the ground pin holding portions 66 of the pair of ground terminals 42 as shown by a two-dot chain line in FIG.

  On the other hand, as shown in FIG. 5, the ground pin 28 of the straight tube lamp 13 is inserted into the socket 16 on the ground side, and at the same time, the pair of lamp pins 31 of the straight tube lamp 13 are inserted into the socket 17 on the power supply side. The pair of lamp pins 31 is disposed on the rotor 75 but is not yet connected to the pair of power supply terminals 76.

  Then, it is rotated by 90 ° about the tube axis of the straight tube lamp 13 to the mounting position so that the light emission direction of the straight tube lamp 13 is directed to a predetermined irradiation direction.

  When the straight tube lamp 13 is rotated, the connecting portion 30 of the ground pin 28 rotates while elastically deforming the ground terminals 42 on both sides outward at both ends in the longitudinal direction of the connecting portion 30 of the ground pin 28. As shown in FIG. 2, when the ground pin 28 is rotated by 90 °, both ends in the longitudinal direction of the connecting portion 30 are fitted into the ground pin holding portions 66 of the ground terminals 42 on both sides and stopped.

  When both end portions of the connecting portion 30 in the longitudinal direction are fitted into the ground pin holding portions 66 of the ground terminals 42 on both sides, the inclined surfaces 67 of the ground pin holding portions 66 of the ground terminals 42 on both sides are in contact with the connecting portions 30 respectively. The ground pin 28 is held in a state where the ground terminals 42 on both sides are in contact with each other at four points. At this time, the restricting piece 68 provided on the front end side of the ground pin holding portion 66 abuts against the wall portion 51 of the case 45 and restricts the ground terminals 42 on both sides from moving outward. Is prevented from coming off from the ground pin holding portion 66, and the ground pin 28 is reliably prevented from falling off the socket 16.

  On the other hand, in FIG. 5, when the straight tube lamp 13 is rotated, the pair of lamp pins 31 are rotated together with the rotor 75 to contact the pair of power supply terminals 76, and the pair of lamp pins 31 are rotated at 90 °. Is held in the socket 17.

  Then, by the operation of the lighting device 18, DC power from the lighting device 18 is supplied to the light source unit 22 through the pair of power supply terminals 76 of the socket 17 for power supply and the pair of lamp pins 31 of the straight tube lamp 13, and the light source unit 22 Each of the semiconductor light emitting elements 25 is turned on, and light from each of the semiconductor light emitting elements 25 passes through the translucent cover 21 and is irradiated in a predetermined irradiation direction below the lighting fixture 12.

  When the straight tube lamp 13 is removed, the straight tube lamp 13 is rotated by 90 ° from the mounting position to the insertion position. Thereby, in the grounding socket 16, the longitudinal direction of the connecting portion 30 of the ground pin 28 is oriented in the insertion direction with respect to the socket 17, and the ground pin 28 can be removed from the insertion groove 49 of the socket 17. On the other hand, in the power supply socket 17, the direction in which the pair of lamp pins 31 are aligned is directed to the insertion direction with respect to the socket 16, and the pair of lamp pins 31 can be removed from the insertion groove 74b of the socket 17.

  When the straight tube lamp 13 is removed, if the straight tube lamp 13 is rotated by 90 ° from the mounting position to the insertion position, the pair of lamp pins 31 is paired with the ground pin 28 and the ground terminal 42 kept in contact with each other. When the contact with the power supply terminal 76 is released and then the straight tube lamp 13 is removed from the sockets 16 and 17, the contact between the ground pin 28 and the ground terminal 42 is released.

  As described above, when the straight tube lamp 13 is attached or detached, the pair of lamp pins 31 and the pair of power supply terminals 76 can be brought into contact with or released from contact with the ground connection.

  According to the socket 16 for grounding, the rotation restricting portion 71 restricts the rotation of the ground pin 28 in a state where the shaft portion 29 is positioned in the insertion groove 49 before the shaft portion 29 is inserted into the ground pin mounting opening 48 of the socket body 41. Therefore, the shaft pin 29 of the ground pin 28 is not securely inserted into the ground pin mounting opening 48 of the socket body 41, or the ground pin 28 can be prevented from being mounted in an obliquely inserted state, and the socket body By allowing rotation of the ground pin 28 only at the correct insertion position where the shaft portion 29 of the ground pin 28 is inserted into the ground pin mounting opening 48 of 41, the ground pin 28 and the ground terminal 42 can be securely connected, and the ground pin 28 It is possible to prevent the socket body 41 from falling off.

  In addition, the space between the insertion groove 49 on the front surface of the socket body 41 and the ground pin mounting opening 48 is narrower than the diameter of the shaft portion 29 of the ground pin 28, and the ground pin is between the insertion groove 49 and the ground pin mounting opening 48. Since the narrow portion 52 that provides resistance to the movement of the shaft portion 29 of 28 is provided, when the ground pin 28 is inserted into the socket 16, it is indicated to the operator that the ground pin 28 has been inserted to the predetermined insertion position of the socket 16. On the other hand, the ground pin 28 can be positioned and held at a predetermined insertion position, and the ground pin 28 can be prevented from being displaced or removed from the predetermined insertion position of the socket 16.

  Next, a second embodiment will be described with reference to FIG. In addition, about the same structure as the said embodiment, the description is abbreviate | omitted using the same code | symbol.

  Dowel-shaped protrusions 81 protrude from both ends of the ground pin holding portion 66 of the ground terminal 42 at both ends on the distal end side and the proximal end side corresponding to the rotation direction of the connection portion 30 of the ground pin 28.

  Then, when rotating the connecting portion 30 of the ground pin 28 inserted between the ground pin holding portions 66 of the pair of ground terminals 42, both ends in the longitudinal direction of the connecting portion 30 of the ground pin 28 are one protrusion of each ground terminal 42. Since both ends in the longitudinal direction of the connecting portion 30 are fitted into the ground pin holding portions 66 of the respective ground terminals 42 by abutting 81 and overcoming each one of the protrusions 81, moderation is given to the rotational position of the ground pin 28. The operator can easily grasp that the ground pin 28 has been rotated to the predetermined mounting position. Also, each other protrusion 81 of each ground terminal 42 is disengaged from the ground pin holding part 66 of each ground terminal 42 because both ends in the longitudinal direction of the connecting portion 30 that have passed over each one protrusion 81 rotate too much. Can be prevented.

  Next, a third embodiment will be described with reference to FIGS. 10 and 11. In addition, about the same structure as the said embodiment, the description is abbreviate | omitted using the same code | symbol.

The ground pin holding portion 66 of the terminal piece 63 of the pair of ground terminals 42 is provided with a ground pin fitting opening 84 into which the connecting portion 30 of the ground pin 28 that rotates to the mounting position is fitted. When rotating the connecting portion 30 of the ground pin 28 inserted between the earth pin holding portions 66, both ends in the longitudinal direction of the connecting portion 30 of the ground pin 28 are fitted into the ground pin fitting openings 84. Moderation can be imparted and the operator can easily understand that the ground pin 28 has been rotated to a predetermined mounting position. In addition, in a state where both ends in the longitudinal direction of the connecting portion 30 are fitted in the ground pin fitting openings 84, the distal end side and the base end side edges of the ground pin fitting openings 84 of the ground terminals 42 on both sides are connected portions 30. Since the ground pin 28 is held in a state where the ground terminals 42 on both sides are in contact with each other, the ground pin 28 can be securely held by the four-point support by the ground terminals 42 on both sides. Prevents it from coming out of 42 or falling out of the socket 16.

  Next, a fourth embodiment will be described with reference to FIG. In addition, about the same structure as the said embodiment, the description is abbreviate | omitted using the same code | symbol.

  The pair of ground terminals 42 are arranged on both sides of the insertion groove 49 in the case 45 at positions where the connection portions 30 of the ground pins 28 inserted into the insertion groove 49 do not contact. That is, the pair of ground terminals 42 do not come into contact only by inserting the ground pin 28 into the insertion groove 49 of the socket body 41, and the ground pin 28 is rotated after being inserted into a predetermined insertion position of the socket body 41, so that the ground pin 28 is rotated. Configured to contact 28.

  The ground pin holding portions 66 of the pair of ground terminals 42 are disposed at positions facing both sides of the connection portion 30 of the ground pin 28 inserted at a predetermined insertion position of the socket body 41.

  When the straight tube lamp 13 is mounted, the connection portion 30 of the ground pin 28 is connected to a pair of ground terminals 42 in a state where the ground pin 28 is inserted into a predetermined insertion position of the socket body 41 as shown in FIG. Not touching. On the other hand, as shown in FIG. 5, in a state where the pair of power supply lamp pins 31 is inserted into the socket 17, the pair of lamp pins 31 is not in contact with the pair of power supply terminals 76.

  By rotating the straight tube lamp 13, as shown in FIG. 12B, the connection portion 30 of the ground pin 28 contacts the pair of ground terminals 42, while the pair of lamp pins 31 contacts the pair of power supply terminals 76. Contact. At this time, the rotation angle θ1 required for the connection portion 30 of the ground pin 28 to contact the pair of ground terminals 42 is smaller than the rotation angle θ2 required for the pair of lamp pins 31 to contact the pair of power supply terminals 76, There is a relationship of θ1 <θ2.

  Therefore, when the straight tube lamp 13 is rotated, the ground pin 28 and the ground terminal 42 are first brought into contact with each other to be connected to the ground, and thereafter, the pair of lamp pins 31 are brought into contact with the pair of power supply terminals 76 to supply power. Become.

  When the straight tube lamp 13 mounted between the sockets 16 and 17 is rotated to remove it, the pair of lamp pins 31 is first released from contact with the pair of power supply terminals 76, and then the ground pin 28 and Contact with the ground terminal 42 is released.

  As described above, when the straight tube lamp 13 is attached or detached, the pair of lamp pins 31 and the pair of power supply terminals 76 can be brought into contact with or released from contact with the ground connection.

  Also in the fourth embodiment, similarly to the first embodiment, the grounding socket 16 includes the rotation restricting portion 71, and the shaft portion 29 of the ground pin 28 is securely inserted into the ground pin mounting opening 48 of the socket body 41. It is possible to prevent the ground pin 28 from being attached when not inserted or obliquely inserted, and at the correct insertion position where the shaft 29 of the ground pin 28 is inserted into the ground pin mounting opening 48 of the socket body 41. Only allowing the rotation of the ground pin 28 ensures the connection between the ground pin 28 and the ground terminal 42 and prevents the ground pin 28 from falling off the socket body 41. Further, the configuration of the ground terminal 42 of the second and third embodiments can be applied.

  Further, the rotation restricting portion 71 may be constituted by only the socket body 41, may be constituted by only the ground terminal 42, or may be constituted by both of them.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Lighting equipment
13 Straight tube lamp
16 socket
17 socket
28 Earthpin
29 Shaft
30 connections
41 Socket body
42 Earth terminal
48 Earthpin mounting opening
49 Insertion groove
52 Narrow part
63 Terminal piece
66 Earthpin holder
71 Rotation restriction part
81 Projection
84 Earth pin fitting opening

Claims (5)

A ground pin mounting opening is provided on the front surface, and an insertion groove is provided from the front end surface intersecting the front surface to the ground pin mounting opening on the front surface, and the shaft portion of the ground pin protruding from one end of the straight tube lamp and the shaft portion The connecting part with an elliptical cross section at the tip is inserted into the inside through the insertion groove on the tip surface, the shaft part of the ground pin is inserted into the ground pin mounting opening from the insertion groove on the front surface, and the ground pin inserted into the ground pin mounting opening is a straight pipe A socket body that is rotated and mounted at a predetermined mounting position around the tube axis of the shaped lamp;
Rotation that allows rotation of the ground pin with the shaft portion inserted into the ground pin mounting opening of the socket body and restricts rotation of the ground pin in a state where it is positioned in the insertion groove before the shaft portion is inserted into the ground pin mounting opening of the socket body With the regulatory department;
A ground terminal to which a connecting portion of a ground pin that rotates to the mounting position is connected;
A socket characterized by comprising: The distance between the insertion groove on the front of the socket body and the ground pin mounting opening is narrower than the diameter of the shaft part of the ground pin, and resistance is given to the movement of the shaft part of the ground pin between the insertion groove and the ground pin mounting opening. The socket according to claim 1, wherein a narrow portion is provided. The grounding terminal faces the peripheral surface of the ground pin connection part, and the ground pin connection part that fits and contacts the ground pin connection part that rotates to the mounting position, and both ends of the ground pin holding part corresponding to the rotation direction of the ground pin connection part The socket according to claim 1, further comprising a protrusion provided at a position. The ground terminal has a pair of terminal pieces facing the peripheral surface of the connection portion of the ground pin, and the pair of terminal pieces is provided with a ground pin fitting opening into which the connection portion of the ground pin that rotates to the mounting position is fitted. The socket according to claim 1, wherein the socket is provided. A straight tube lamp in which a ground pin having a shaft portion at one end and a connecting portion having an elliptical cross section at the tip of the shaft portion is projected, and a power supply lamp pin is projected from the other end;
A socket according to any one of claims 1 to 4, wherein a ground pin of a straight tube lamp is mounted;
A power supply socket into which a lamp pin of a straight tube lamp is inserted;
An illumination device comprising:

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