JP2006331701A - Lamp socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obviate the need to plunge a rotor in attaching a lamp, to facilitate attachment and detachment operations of the lamp, and to allow the lamp to be surely attached, in a lamp socket. <P>SOLUTION: This lamp socket 1 is provided with: a socket body 10 comprising a cover 2 and a body 3; the rotor 4; and a pair of conductive plates 5. The rotor 4 is rotatably arranged in an opening 2a of the cover 2 and a cam surface 4c of the rotor 4 is brought into contact with a cam surface 3c of the body 3. Lamp pins of the lamp are arranged in a lamp pin holding slot 4b from a lamp pin insertion slot 2b of the cover 2 when the rotor 4 is located at an insertion position. When a rotation operation is executed and the rotor 4 is rotated along with the lamp pins, the cam surface 4c slides on the cam surface 3c and the rotor 4 moves forward. When the rotor 4 is rotated to a mounting position, lamp holder surfaces 4a of the rotor 4 contact a base surface of the lamp to catch the lamp and the lamp pins contact the conductive plates 5 to allow the lamp to carry a current. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lamp socket applied to a lighting fixture for lighting a straight tube fluorescent lamp.

  2. Description of the Related Art Conventionally, as a lamp socket applied to a lighting fixture for lighting a straight tube fluorescent lamp, for example, as shown in Patent Document 1, a rotatable rotor and a pair of contact conductive members sandwiching the rotor are provided. A sandwich type with a body built in the socket body is used. An example of a lighting fixture using such a lamp socket is shown in FIG. The lamp socket 81 is disposed on the instrument main body 840 at positions near both ends in the longitudinal direction of the lamp 850 and used as a pair. The lamp 850 is attached to the lamp socket 81 of the luminaire by moving the lamp 850 in the direction of the black arrow in the drawing in a state where the rotor is at a predetermined insertion position. After the lamp 850 is moved and the lamp pins 852 protruding from the cap surfaces 851 at both ends are inserted into the rotor of the lamp socket 81, the lamp 850 is rotated, and the rotor is rotated together with the lamp pins 852. When the rotor is rotated from the insertion position to a predetermined mounting position, the lamp pin 852 is held between the contact conductors, and the lamp 850 is held in the lamp socket 81. The lamp 850 is removed by the reverse procedure. After the lamp 850 is rotated and the rotor is moved from the mounting position to the insertion position, the lamp 850 is moved in the direction opposite to the black arrow in the figure, and the lamp 850 is removed. It is.

  When the lamp 850 is held as described above and there is play such that the lamp 850 moves in the longitudinal direction, the contact between the lamp pin 852 and the contact conductor becomes unstable when vibration is applied, and the contact is released. This may cause a problem that the lamp 850 turns off for a moment. In Patent Document 1, in order to solve such a problem, the rotor is urged in the axial direction of the lamp 850 by the contact conductor and pressed against the base surfaces 851 at both ends of the lamp 850. Is described. When the lamp 850 is not mounted, the distance between the rotors of the pair of lamp sockets 81 (hereinafter referred to as the socket interval) is smaller than the dimension between the base surfaces 851 at both ends of the lamp 850 (hereinafter referred to as the lamp length). Has been. When the lamp 850 is mounted, the lamp pin 852 is inserted into the rotor while pressing the rotor so as to widen the socket interval.

  Further, as another technique for solving the above-described problems, the lamp socket 81 itself is attached to the fixture body 840 so as to be movable in the longitudinal direction of the lamp 850, or the lamp socket 81 itself is flexible. What is composed is known. At this time, the lamp pin 852 is inserted into the rotor while pressing the lamp socket 81 and moving or deforming the lamp socket 81 in the direction of the white arrow in the figure to widen the socket interval.

  However, as described above, when the lamp 850 is always sandwiched between the lamp sockets 81, the work of attaching the lamp 850 cannot be easily performed because it is necessary to perform the work while expanding the socket interval. It will be difficult. Further, when the lamp pin 852 is inserted into the rotor, the base surface 851 is clamped by the lamp socket 81, so that the lamp 850 is apparently held at this point. If the lamp 850 and the rotor are not rotated by mistake, the lamp 850 may drop due to impact, vibration, or the like.

  Moreover, as a lamp socket for a straight tube fluorescent lamp, the lamp pin 852, the contact conductive plate, and the like can be obtained only by pushing the member of the lamp socket in the longitudinal direction without rotating the lamp 850 in addition to the sandwiching type as described above. A butting operation type is also known, in which a lamp 850 is attached by being brought into contact with each other. For this reason, the user misunderstands that the actual lamp socket 81 is a sandwich-type lamp socket as described above, but without rotating the mounted lamp 850, The lamp 850 may be forcibly removed only by pushing it in the axial direction.

In the pinch-type lamp socket 81, if the lamp 850 mounted as described above is not rotated when it is removed, the rotor remains in the insertion position. When the rotor is not in the insertion position, the contact conductive plate is not in a position where the lamp pin 852 can be inserted. Thus, if the lamp 850 is forcibly attached while the rotor is not in the insertion position, the contact conductive plate may be deformed or a contact failure may occur due to the lamp pin 852 not being inserted in the proper position. Sometimes.
JP-A-8-190973

  The present invention has been made to solve the above-described problems, and it is not necessary to push in the rotor when the lamp is mounted, the lamp can be easily attached and detached, and the lamp can be securely mounted. It is an object to provide a lamp socket capable of.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a socket body having an opening on the front surface and a lamp pin insertion groove communicating with the opening from the outer surface is rotatably disposed in the opening. A rotor whose front surface is a receiving surface in contact with the base surface of the lamp, and a conductive plate disposed in the socket body and energizing the lamp by being in contact with the lamp pin. A lamp pin holding groove that is open to the gold surface and communicates with the lamp pin insertion groove when the position of the rotor with respect to the socket body is the insertion position, so that the lamp pin can be inserted from the outside; A pair of lamp pins arranged in the luminaire body so as to face each other, and the lamp pins inserted into the lamp pin holding grooves from the lamp pin insertion grooves are rotated together with the rotor from the insertion position to the mounting position. Thus, in a lamp socket for a straight tube fluorescent lamp in which the lamp pin comes into contact with the conductive plate and is mounted so that the lamp can be energized, when both rotors of the pair of lamp sockets are in the insertion position, these rotors Are arranged in the luminaire main body so that the distance between the metal receiving surfaces is longer than the length between the cap surfaces at both ends of the lamp, and the rotor rotates when the lamp pin is rotated together with the rotor. At the same time, the metal receiving surface protrudes toward the base surface of the lamp, and when the lamp pin and the rotor are in the mounting position, the power receiving surface comes into contact with the base surface.

  According to a second aspect of the present invention, in the first aspect of the invention, the socket body and the rotor each have a cam surface that abuts each other, and the rotor is rotated when the rotor is rotated by a rotation operation. As the cam surface slides on the cam surface of the socket body, the rotor moves forward.

  According to a third aspect of the present invention, in the first aspect of the invention, the socket main body has a locking portion for locking the rotor, and the rotor has the rotor at the insertion position. Sometimes it is locked to the socket body by the locking portion, and when the position of the rotor is in the mounting position, the locking by the locking portion is released and can be moved forward.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, when the rotor is not mounted with a lamp and the rotor is in the mounted position, the rotors of the pair of lamp sockets are received. It is in a state of protruding forward so that the distance between the metal surfaces is shorter than the length between the base surfaces at both ends of the lamp.

  According to the first aspect of the present invention, when the rotor is in the insertion position when the lamp is mounted, the lamp pin can be inserted into the lamp pin holding groove without pushing the rotor, and the lamp pin is rotated together with the rotor. When the rotor is in the mounting position, the receiving surface of the rotor comes into contact with the base of the lamp, so that the lamp can be easily attached and removed, and the lamp must be mounted securely. Is possible.

  According to the invention of claim 2, when the rotor rotates, the rotor cam moves forward by sliding the cam surface of the rotor on the cam surface of the socket body. The rotor moves reliably in accordance with the rotation, and the lamp can be mounted more reliably as described above.

  According to the invention of claim 3, since the rotor is locked to the socket body when in the insertion position, and the locking is released when it is in the mounting position, the lamp pin is inserted into the lamp pin holding groove. At this time, the rotor is held in a state in which the socket interval is surely longer than the lamp length, and the lamp can be easily attached and detached as described above.

  According to the invention of claim 4, when the lamp is not mounted and the position of the rotor is the mounting position, the socket interval is shorter than the lamp length. Can no longer be inserted, and it is possible to prevent damage to the conductive plate and occurrence of poor contact.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a lamp socket 1 according to this embodiment. Moreover, FIG.2 and FIG.3 (a), (b) shows an example of the lighting fixture using the lamp socket 1 which concerns on this embodiment. The lamp socket 1 includes a socket body 10 including a cover 2 and a body 3, a rotor 4, and a pair of conductive plates 5. The rotor 4 and the conductive plate 5 are arranged in the body 3 and the front side is covered with the cover 2 and is housed in the socket body 10. The lamp socket 1 holds two lamp pins 52 erected on a base surface 51 at a longitudinal end portion of a lamp 50 that is a straight tube fluorescent lamp.

  The cover 2 of the socket body 10 has an opening 2a on the front surface, and has a lamp pin insertion groove 2b that communicates with the opening 2a from the outer surface and is open on the front surface. In the present embodiment, the lamp pin insertion groove 2b is provided at the upper end of the outer surface. Further, four wire insertion holes 2c through which electric wires for supplying power and the like to the conductive plate 5 disposed inside the socket body 10 pass are provided in the lower part.

  The body 3 of the socket main body 10 has a rotor holding cylinder 3a standing vertically on the back, a slit 3b provided in the rotor holding cylinder 3a, and a back of the body 3 of the rotor holding cylinder 3a. A cam surface 3c formed on the side root portion toward the front surface, a rotor locking claw (locking portion) 3d formed on the front tip of the rotor holding cylinder 3a, and a lower portion of the body 3. A mounting groove 3e is provided. As will be described later, the rotor holding cylinder 3a is inserted through the rotor 4 so as to be rotatable. The slit 3b is provided at a position corresponding to the lamp pin insertion groove 2b of the cover 2 when the cover 2 is assembled to the body 3, that is, in the vertical direction of the rotor holding cylinder 3a in this embodiment. As will be described later, the cam surface 3c comes into contact with the cam surface 4c formed on the rotor 4 when the rotor 4 is disposed. In the present embodiment, the cam surface 3c has a disk shape with the rotor holding cylinder 3a as an axis. For example, the cam surface 3c smoothly and alternately repeats unevenness every 90 degrees in the direction of rotation around the axis. Has a profile. The mounting groove 3e is formed so that when the lamp socket 1 is attached to the luminaire main body 40, the luminaire main body 40 is fitted. That is, the lamp socket 1 is supported by the luminaire main body 40 as shown in FIGS. 3A and 3B by fitting the luminaire main body 40 into the mounting groove 3e.

  The rotor 4 has a cylindrical shape in the present embodiment, and the front surface is a receiving surface 4a that comes into contact with the cap surface 51 when the lamp 50 is mounted, and is opened to the receiving surface 4a to be a circumferential side surface of the rotor 4. A lamp pin holding groove 4b formed on the rear surface, a cam surface 4c formed on the rear surface, and a locked portion 4d provided to be engaged with the rotor locking claw 3d at a predetermined position on the cylindrical inner surface. ing. The chamfers on both sides of the lamp pin holding groove 4b are chamfered so as to be smaller than the outer circumference of the cylindrical shape, but this is not restrictive. The rotor 4 is rotatably inserted into the rotor holding cylinder 3a of the body 3 with the metal receiving surface 4a as the front surface. When the body 3 is covered by the cover 2, the metal receiving surface 4a is the opening of the cover 2. It is comprised so that it may expose outside from the part 2a. That is, the rotor 4 is rotatably disposed in the opening 2 a of the socket body 10. The lamp pin holding groove 4b communicates with the lamp pin insertion groove 2b of the cover 2 when the rotor 4 is disposed in the opening 2a and the position in the rotation direction with respect to the socket body 10 is a predetermined position. Is provided. The rotational position of the rotor 4 at this time is the insertion position, and as will be described later, the lamp pin 52 of the lamp 50 can be inserted into the lamp pin holding groove 4b from the outside through the lamp pin insertion groove 2b. The cam surface 4 c is a surface that comes into contact with the cam surface 3 c when the rotor 4 is disposed on the body 3. In this embodiment, the cam surface 4c has a profile in which the direction of unevenness is substantially symmetrical to the cam surface 3c so as to be joined to substantially the entire surface of the cam surface 3c when the rotor 4 is at the insertion position. However, it is not limited to this.

  The conductive plate 5 has, for example, a terminal portion 5a which is a fast connection terminal and a concave portion 5b for holding the lamp pin 52 as will be described later. An electric wire from the outside is arranged in the lamp socket 1 through the electric wire insertion hole 2 c of the cover 2, and this electric wire is connected to the terminal portion 5 a of the conductive plate 5. When the conductive plates 5 come into contact with the lamp pins 52, the lamp 50 can be energized. The pair of conductive plates 5 are provided so as to sandwich the peripheral side surface of the rotor 4 as will be described later when disposed in the lamp socket 1. When the rotor 4 is in the insertion position, the conductive plate 5 is disposed so as not to obstruct the path through which the lamp pin 52 is inserted from the lamp pin insertion groove 2b to the lamp pin holding groove 4b.

  The lamp socket 1 is supported by the luminaire main body 40 so that the upper surface of the lamp socket 1 faces downward and the front surfaces thereof, that is, the metal receiving surfaces 4a face each other. Here, when the lamp 50 is not mounted and the rotors of the pair of lamp sockets 1 are both in the insertion position, the pair of lamp sockets 1 receive the rotors 4 as shown in FIG. The distance between the metal surfaces 4a (referred to as the “socket interval”) is set to be longer than the length between the cap surfaces 51 at both ends of the lamp 50 (referred to as the lamp length).

  Next, the operation when the lamp 50 is attached to and detached from the lamp socket 1 will be described. When the rotor 4 is in the insertion position, as shown in FIGS. 2 and 3A, the lamp 50 is disposed from below the luminaire body 40, that is, from above the lamp socket 1. Then, the lamp pins 52 at both ends of the lamp 50 are inserted into the lamp pin holding grooves 4b from the lamp pin insertion grooves 2b of the pair of lamp sockets 1, respectively. As shown in FIG. 3B, when the lamp pin 52 is inserted into the lamp pin holding groove 4b, the lamp 50 is rotated around its axis, so that the lamp pin 52 is mounted together with the rotor 4 from the insertion position, which will be described later. The lamp pin 52 is brought into contact with the conductive plate 5 so that the lamp 50 can be energized.

  4 (a), 4 (b), 5 (a), and 5 (b) show the lamp socket 1 when the rotor 4 is in the insertion position, and FIGS. 6 (a), 6 (b), and 7 (a). ), (B) show the lamp socket 1 when the rotor 4 is in the mounting position. As described above, when the rotor 4 is in the insertion position, the lamp pin insertion groove 2b and the lamp pin holding groove 4b communicate with each other. At this time, as shown in FIG. 5A, the rotor locking claw 3 d of the body 3 locks the locked portion 4 d of the rotor 4, so that the rotor 4 is attached to the socket body 10. It is locked. As a result, the rotor 4 is restricted from moving forward and can only rotate. At this time, as indicated by an arrow in FIG. 4A, the lamp pin 52 is inserted into the lamp pin holding groove 4b from above the lamp socket 1 through the lamp pin insertion groove 2b. As shown in FIG. 5B, the two lamp pins 52 inserted into the lamp pin holding groove 4b are arranged substantially symmetrically with the rotation axis of the rotor 4 interposed therebetween. As shown in FIG. 4B, the conductive plate 5 is arranged so as to sandwich the circumferential side surface of the rotor 4, so that when the rotor 4 is in the insertion position, it is exposed to the outside as viewed from the opening 2a. The conductive plate 5 and the lamp pin 52 are not in contact with each other.

  When the rotation operation for rotating the lamp 50 in the axial direction with the lamp pin 52 inserted in the lamp pin holding groove 4b is performed, the lamp pin 52 comes into contact with the vicinity of the side peripheral surface of the inner surface of the lamp pin holding groove 4b, thereby rotating with the lamp pin 52. The child 4 rotates together. In the present embodiment, the mounting position is the position when the rotor 4 is rotated 90 degrees in the left or right rotation direction from the insertion position. When the rotor 4 is rotated to the mounting position, as shown in FIGS. 6B and 7A, the portion where the chamfering of the side surface of the rotor 4 is sandwiched between the conductive plates 5 is sandwiched. Thus, the distance between the pair of conductive plates 5 approaches each other. At this time, as shown in FIG. 7B, the lamp pin 52 is in the recessed portion 5b of the conductive plate 5, the lamp pin 52 and the conductive plate 5 come into contact with each other, and the lamp 50 can be energized. Here, as shown in FIG. 7A, when the rotor 4 rotates from the insertion position, the position of the locked portion 4d shifts from the position of the rotor locking claw 3d. The locking is released, and the rotor 4 can move in the direction of the rotation axis. Further, since the rotor 4 and the body 3 are in contact with each other at the respective cam surfaces 3c and 4c, when the rotor 4 rotates, the contact position of the cam surfaces 3c and 4c changes, so that the rotor 4 Move forward.

  8A and 8B show the movement of the rotor 4 when the rotor 4 changes from the insertion position to the mounting position in a state where the lamp pin 52 is inserted into the lamp pin holding groove 4b. As shown in FIG. 8A, when the rotor 4 is in the insertion position, there is a gap between the metal receiving surface 4 a of the rotor 4 and the base surface 51 of the lamp 50. At this time, as described above, the cam surface 3c of the body 3 and the cam surface 4c of the rotor 4 are in a state in which the concave portion and the convex portion are combined with each other and the cam surface 3c is in contact with substantially the entire surface of the cam surface 4c. It has become. Then, when the lamp pin 52 and the rotor 4 are rotated by the rotation operation, the convex portion of the cam surface 4 c of the rotor 4 slides on the cam surface 3 c of the body 3. At this time, the portion where the convex portion of the cam surface 4c abuts changes from the concave portion on the cam surface 3c to the convex portion with the rotation of the rotor 4, whereby the rotor 4 moves forward and receives. The gold surface 4 a protrudes toward the base surface 51 of the lamp 50. Then, as shown in FIG. 8B, when the rotor 4 is rotated 90 degrees to the mounting position, the receiving surface 4a comes into contact with the base 51 and the lamp 50 is clamped.

  In this embodiment, when the mounted lamp 50 is removed, the procedure is the reverse of the above-described operation for attachment. That is, first, a rotation operation for rotating the lamp 50 is performed to rotate the rotor 4 from the mounting position to the insertion position. At this time, since the cam surface 3c slides on the cam surface 4c, the metal receiving surface 4a does not come into contact with the base surface 51 and the clamping of the lamp 50 is released. Then, the lamp pin 52 is removed from the lamp pin holding groove 4b through the lamp pin insertion groove 2b, and the lamp 50 is moved downward from the luminaire body to be removed. After the lamp 50 is removed, when the user pushes the rotor 4 into the socket body 10 by operating the rotor 4 or the like, the locked portion 4d is again engaged with the rotor locking claw 3d. It can be stopped, and the state before the mounting of the lamp 50 is returned again.

  In this way, when the rotor 4 is in the insertion position when the lamp 50 is attached, the lamp pin 52 can be inserted into the lamp pin holding groove 4b without pushing the rotor 4, and the lamp pin 52 and the rotor 4 can be inserted together. When the rotor 4 is rotated to the mounting position, the metal receiving surface 4a of the rotor 4 contacts the base surface 51 of the lamp 50, so that the lamp 50 can be easily attached and detached. At the same time, the lamp 50 can be securely mounted. Also, when the rotor 4 rotates, the cam surface 4c of the rotor 4 slides on the cam surface 3c of the body 3 of the socket body 10 so that the rotor 4 moves forward. The rotor 4 moves reliably according to the movement, and the lamp 50 is more securely clamped and mounted.

  Further, since the rotor 4 is locked to the body 3 of the socket body 10 when in the insertion position, and the locking is released when it is in the mounting position, the lamp pin 52 is inserted into the lamp pin holding groove 4b. At this time, the rotor 4 is held in a state in which the socket interval is surely longer than the lamp length, and the mounting operation of the lamp 50 can be performed more easily.

  FIG. 9 shows a lamp socket according to the second embodiment of the present invention. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and only the portions different from those in the above embodiment will be described. The lamp socket 11 is different from the above-described embodiment in that the rotor 14 is moved using a spring 16 instead of the cam surface as described above.

  In the present embodiment, the socket body 110 includes the cover 2 and the body 13. The body 13 includes a rotor holding cylinder 13a erected vertically forward from the back surface, a slit 13b provided in the rotor holding cylinder 13a, and a rotor locking formed at a front end portion of the rotor holding cylinder 13a. It has a claw (locking portion) 13d and a mounting groove 13e formed in the lower portion of the body 13. That is, the body 13 does not have a portion corresponding to the cam surface 3c as compared with the body 3 of the first embodiment.

  Further, the front surface of the rotor 14 is a receiving surface 14a that comes into contact with the cap surface 51 when the lamp 50 is mounted, and a lamp pin holding groove 14b that is opened on the receiving surface 14a and formed on the peripheral side surface of the rotor 14. And a locked portion 14d provided to be engageable with the rotor locking claw 13d at a predetermined position on the cylindrical inner surface. That is, the rotor 14 does not have a portion corresponding to the cam surface 4c as compared with the rotor 4 of the first embodiment. The locked portion 14d is provided so as to be locked by the rotor locking claw 13d of the body 13 when the rotor 14 is in the mounting position.

  The spring 16 has, for example, a string winding shape using a metal wire, and is inserted between the body 13 and the rotor 14 in the rotor holding cylinder 13a. The spring 16 contacts the body 13 at one end on the back side of the body 13 and contacts the rotor 14 at the other end. The length of the spring 16 is set so that when the lamp 50 is mounted on the socket body 110, the spring 16 is in contact with the body 13 and the rotor 14 and is contracted from the natural state.

  The operation when the lamp 50 is mounted on a lighting fixture using the lamp socket 11 will be described below. Also in the present embodiment, as in the first embodiment, when the rotor 14 is in the insertion position, the lamp pin 52 of the lamp 50 is inserted into the lamp pin holding groove 14b, and the lamp 50 is rotated around its axis. By setting the rotor 14 to the mounting position, the lamp pin 52 comes into contact with the conductive plate 5 and the lamp 50 is mounted so as to be energized.

  10A, 10B and 10C show the operation of the rotor 14 when the lamp 50 is mounted. As shown in FIG. 10A, when the rotor 14 is in the insertion position and the lamp pin 52 of the lamp 50 is inserted in the lamp pin holding groove 14b, there is a gap between the metal receiving surface 14a and the base surface 51. There is a gap. At this time, since the spring 16 is compressed more than the natural state, the rotor 14 is biased toward the front of the lamp socket 11, but the locked portion 14d is the rotor locking claw 13d. Since it is latched by, it is in the state which maintained the above-mentioned clearance gap.

  When the lamp pin 52 is inserted into the lamp pin holding groove 14b and the rotation operation of the lamp 50 is performed, the locking by the rotor locking claw 13d is released, and the rotor 14 can move forward. At this time, the rotor 14 moves forward by the restoring force of the spring 16 acting. Then, as illustrated in FIG. 10B, the rotor 14 is in the mounting position in a state where the metal receiving surface 14 a is in contact with the base surface 51. As a result, the lamp pin 52 comes into contact with the conductive plate 5 so that the lamp 50 can be energized, and the cap surfaces 51 at both ends of the lamp 50 come into contact with the receiving surface 14a so that the lamp 50 is clamped.

  When the lamp 50 is removed, the reverse operation of the attachment may be performed. That is, after the lamp 50 is rotated to place the rotor 14 in the insertion position, the lamp pin 52 is removed from the lamp pin holding groove 14b. Here, when the rotor 14 is in the insertion position, the lamp 50 may be removed in that state, or the lamp 50 may be removed after the rotor 14 is pushed rearward of the lamp socket 11. When the rotor 14 is pushed in when the rotor 14 is in the insertion position, the locked portion 14d is locked by the rotor locking claw 13d, and a gap is again formed between the metal receiving surface 14a and the base surface 51. The lamp pin 52 can be easily removed from the lamp pin holding groove 14b.

  Here, in the present embodiment, for example, when the position of the rotor 14 is in the mounting position in a state where the lamp 50 is mounted, the lamp 50 is forcibly pushed by, for example, the rotor 14 being pushed in forcibly. Assume that it has been removed. Such an operation may be performed when the user misunderstands the lamp socket 11 as a butted lamp socket. As described above, when the lamp 50 is not mounted and the position of the rotor 14 is the mounting position, the distance between the metal receiving surfaces 14a of the rotor 14 of the pair of lamp sockets 11 is equal to the caps at both ends of the lamp 50. It will be in the state protruded ahead so that it may become shorter than the length between the surfaces 51. FIG. That is, the metal receiving surface 14a of the rotor 14 is in a state of moving forward from the position when the lamp 50 is mounted by the restoring force of the spring 16, as indicated by the arrow in FIG. .

  Thus, in order to return the rotor 14 to the state before the lamp 50 is mounted again from the state in which the rotor 14 projects forward, the user picks the rotor 14 and rotates it 90 degrees from the mounting position to the insertion position. Can be pushed into the body 13. As a result, the locked portion 14d is locked to the rotor locking claw 13d, the rotor 14 is held at such an interval that the socket interval is longer than the lamp length, and the lamp 50 can be mounted again.

  As described above, in the present embodiment, when the lamp 50 is mounted, the lamp pin 52 is inserted into the lamp pin holding groove 14b without pushing the rotor 14, and the lamp 50 is rotated to bring the rotor 14 into the mounting position. Then, the locking by the rotor locking claw 13d is released, and the receiving surface 14a comes into contact with the base surface 51 by the restoring force of the spring 16, so that the lamp 50 is securely held. For this reason, as in the first embodiment described above, the lamp 50 can be easily attached and detached. Further, when the lamp 50 is not mounted and the position of the rotor 14 is the mounting position, the socket interval is shorter than the lamp length, so that the lamp 50 is inserted when the position of the rotor 14 remains unchanged. I can't do that. For this reason, it becomes possible to prevent the breakage of the conductive plate 5 and the occurrence of poor contact due to the lamp 50 being forcibly attached.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, in the first embodiment described above, the cam surfaces of the socket body 10 and the rotor 4 may not be in contact with each other. For example, a pin-shaped cam surface of the rotor 4 is fitted into a cam surface provided in a groove shape in the direction in which the rotor 4 rotates in the socket body, and the groove-shaped according to the rotation of the rotor 4. A configuration in which the rotor 4 is moved by a pin-shaped cam surface along the cam surface may be used. The cam surface not only moves the rotor 4 forward when the rotor 4 rotates from the insertion position to the mounting position, but conversely when the rotor 4 rotates from the mounting position to the insertion position. The configuration may be such that is moved backward.

  Further, in the present invention, the forward movement of the rotor 4 when the rotor 4 is rotated from the insertion position to the mounting position is not limited to the contact between the cam surfaces 3c and 4c, the spring 16 and the like. . For example, a resin spring or the like that urges the rotor 4 forward may be formed on the back surface of the body 3 of the socket body 10. At this time as well, the same as in the second embodiment described above. Thus, the lamp 50 can be easily and reliably attached.

1 is an exploded perspective view of a lamp socket according to a first embodiment of the present invention. The front view which shows an example of the lighting fixture using a lamp socket same as the above. (A) is a perspective view which shows before attaching a lamp to a lighting fixture same as the above, (b) is a perspective view which shows the state which attached the lamp to the fixture. (A) is a perspective view which shows when a rotor is an insertion position of a lamp socket same as the above, (b) is an exploded perspective view of (a). (A) is sectional drawing which shows when a rotor is an insertion position of the lamp socket same as the above, Comprising: The sectional view on the AA line of (b), (b) is the front view of the lamp socket. (A) is a perspective view which shows when a rotor is a mounting position of a lamp socket same as the above, (b) is an exploded perspective view of (a). (A) is sectional drawing which shows when a rotor is an attachment position of a lamp socket same as the above, Comprising: BB sectional drawing of (b), (b) is a front view of the lamp socket. (A) is a figure explaining operation | movement when mounting | wearing a lamp socket same as the above, Comprising: A figure which shows when a rotor is an insertion position, (b) is a rotor of (a) in a mounting position. The figure which shows a certain time. The disassembled perspective view of the lamp socket which concerns on the 2nd Embodiment of this invention. (A) is a figure explaining operation | movement when mounting | wearing a lamp socket same as the above, Comprising: A figure which shows when a rotor is an insertion position, (b) is a rotor of (a) in a mounting position. The figure which shows a certain time, (c) is a figure which shows the time when the lamp | ramp is not mounted | worn with the lamp socket but the position of a rotor is a mounting position. The front view which shows an example of the lighting fixture using the conventional lamp socket.

Explanation of symbols

1,11 Lamp socket 2 Cover 2a Opening 2b Lamp pin insertion groove 3,13 Body 3c Cam surface of the body (cam surface of the socket body)
3d, 13d Rotor locking claw (locking part)
4,14 Rotor 4a, 14a Receiving surface 4b, 14b Lamp pin holding groove 4c Rotor cam surface 5 Conductive plate 10, 110 Socket body 40 Lighting fixture body 50 Lamp 51 Base surface 52 Lamp pin

Claims (4)

A socket body having an opening on the front surface and a lamp pin insertion groove communicating with the opening from the outer surface;
A rotor that is rotatably arranged in the opening and has a front surface that serves as a metal receiving surface in contact with the base of the lamp;
A conductive plate disposed in the socket body and energizing the lamp by contacting the lamp pin;
The rotor has a lamp pin holding groove that is open to the metal receiving surface and communicates with the lamp pin insertion groove when the position of the rotor with respect to the socket body is an insertion position so that a lamp pin can be inserted from the outside. And
The lamp pins inserted in the lamp pin holding groove from the lamp pin insertion groove are rotated together with the rotor from the insertion position to the mounting position by being paired with the luminaire main body so that the receiving surfaces face each other. In a lamp socket for a straight tube fluorescent lamp in which the lamp pin comes into contact with the conductive plate so that the lamp can be energized,
When the rotors of the pair of lamp sockets are both in the insertion position, the distance between the receiving surfaces of these rotors is arranged in the luminaire main body so as to be longer than the length between the base surfaces at both ends of the lamp,
When the lamp pin is rotated together with the rotor, the rotor rotates and moves forward so that the receiving surface protrudes toward the base of the lamp, and the lamp pin and the rotor are in the mounting position. The lamp socket is characterized in that the receiving surface comes into contact with the base surface when the lamp socket is opened. The socket body and the rotor each have a cam surface that abuts each other,
The lamp according to claim 1, wherein when the rotor is rotated by a rotation operation, the rotor moves forward by sliding the cam surface of the rotor on the cam surface of the socket body. socket. The socket body has a locking portion for locking the rotor,
The rotor is locked to the socket body by the locking portion when the rotor is in the insertion position, and the locking by the locking portion is released when the rotor is in the mounting position. The lamp socket according to claim 1, wherein the lamp socket is movable forward. When the rotor is not mounted with a lamp and the rotor is in the mounted position, the distance between the receiving surfaces of the rotors of the pair of lamp sockets is the length between the cap surfaces at both ends of the lamp. 2. The lamp socket according to claim 1, wherein the lamp socket projects forward so as to be shorter.

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