JP6589423B2 - Lighting socket - Google Patents

Description

  The present invention relates to a lighting socket.

  In conventional lighting sockets (fluorescent lamp sockets), a hole for inserting a conductive pin of a fluorescent lamp (illuminating lamp) is provided in the socket body, a pair of contact pieces are provided inside the insertion hole, and the conductive pin is inserted. A device that is inserted into a hole and rotated to contact a contact piece is known (see, for example, Patent Document 1).

Japanese Patent No. 3668883

  However, in the conventional lighting socket shown in Patent Document 1, even if the rotation is insufficient or excessive when the illuminating lamp is attached, the conductive pin and the contact piece can conduct in an incomplete contact state. Therefore, even if the mounting state of the illuminating lamp is inappropriate, the illuminating lamp can be turned on and used, and therefore the illuminating lamp may be used with the mounting state being inappropriate. In addition, since the conductive pin and the contact piece are used with poor contact, the contact resistance between the conductive pin and the contact piece increases, which may increase the temperature of the contact portion.

  The present invention has been made to solve such a problem, and can prevent an illuminating lamp from being used in an improperly mounted state, and can conduct electricity due to incomplete mounting when the illuminating lamp is replaced. It is possible to obtain a lighting socket capable of preventing poor contact between a pin and a contact piece.

The lighting socket according to the present invention includes a pair of contact pieces made of an electrical conductor, and the illumination lamp is rotated in a state where the pair of conductive pins of the illumination lamp is disposed between the pair of contact pieces. Then, each of the conductive pins is brought into contact with each of the contact pieces, and the illuminating lamp is held by the elastic force of the contact pieces in a state where the conductive pins are in contact with each other at an appropriate preset position of the contact piece The lighting socket includes an insulator provided so as to cover a surface of the contact piece, and the insulator excludes a preset allowable range including the proper position on the surface of the contact piece. The pin can be in contact with the insulator , and can be provided at least in a portion where the elastic force of the contact piece can act on the conductive pin .

  In the lighting socket according to the present invention, the use of the illuminating lamp in an improper mounting state can be prevented, and the poor contact between the conductive pin of the illuminating lamp and the contact piece due to incomplete mounting when the illuminating lamp is replaced. It is possible to prevent this.

It is a disassembled perspective view of the socket for illumination which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the socket for illumination which concerns on Embodiment 1 of this invention. It is the perspective view seen from the back surface of the socket for illumination which concerns on Embodiment 1 of this invention. It is a principal part enlarged view of the contact piece with which the socket for illumination which concerns on Embodiment 1 of this invention is provided. FIG. 5 is an arrow view of the contact piece viewed from the direction of arrow C shown in FIG. 4. It is a principal part enlarged view which shows an example of the contact piece with which the socket for illumination which concerns on Embodiment 2 of this invention is provided. It is a principal part enlarged view which shows another example of the contact piece with which the socket for illumination which concerns on Embodiment 2 of this invention is provided. It is a principal part enlarged view which shows another example of the contact piece with which the socket for illumination which concerns on Embodiment 2 of this invention is provided. It is a disassembled perspective view of the socket for illumination which concerns on Embodiment 3 of this invention. It is a longitudinal cross-sectional view of the socket for illumination which concerns on Embodiment 3 of this invention. It is the perspective view seen from the back surface of the socket for illumination which concerns on Embodiment 3 of this invention. It is a principal part enlarged view of the contact piece with which the socket for illumination which concerns on Embodiment 3 of this invention is provided. It is the arrow line view of the contact piece seen from the direction of arrow E shown in FIG.

  DESCRIPTION OF EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and overlapping descriptions are simplified or omitted as appropriate. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the spirit of the present invention.

Embodiment 1 FIG.
1 to 5 relate to Embodiment 1 of the present invention. FIG. 1 is an exploded perspective view of a lighting socket, FIG. 2 is a longitudinal sectional view of the lighting socket, and FIG. 3 is a rear view of the lighting socket. FIG. 4 is an enlarged view of a main part of a contact piece provided in the lighting socket, and FIG. 5 is an arrow view of the contact piece seen from the direction of arrow C shown in FIG.

  As shown in FIGS. 1 and 2, the lighting socket according to the present invention includes a socket body 1. The socket body 1 has a box shape and is made of an insulating material such as plastic. The socket body 1 is formed by a peripheral wall including a front plate 2, a first side surface 3, a second side surface 4, an upper surface 5 and a bottom surface 6. A hollow portion 7 is formed inside the peripheral wall of the socket body 1.

  The upper part of the front plate 2 is formed in a substantially semicircular shape, and the upper surface 5 is formed in a curved surface according to this. The bottom surface 6 has a certain thickness. A circular conductive pin insertion hole 8 is formed in the upper part of the front plate 2. The conductive pin insertion hole 8 can insert a pair of conductive pins 9 in a rotatable manner. As shown in FIG. 2, a pair of conductive pins 9 are provided at both ends of the straight tubular illumination lamp 9a. The illumination lamp 9a is specifically a straight tube fluorescent lamp, a straight tube LED, or the like.

  An insertion groove 10 is formed in the upper part of the conductive pin insertion hole 8. One end side of the insertion groove 10 is connected to the conductive pin insertion hole 8. The insertion groove 10 is formed in an L shape from the front plate 2 to the vicinity of the rear portion of the upper surface 5. Further, a main body locking portion 11 is provided on the back side of the insertion groove 10 on the upper surface 5.

  An inverted concave central support 12 is formed at the center of the bottom surface 6 in the cavity 7. Side support plates 13 are provided on both the left and right sides of the central support 12. These side support plates 13 are arranged at the same height as the support upper surface 12 a of the center support portion 12. A fixed gap 14 is formed between the left and right support side surfaces 12 b of the center support portion 12 and the end portions of the side support plates 13. Then, leg support spaces 15 are formed in portions surrounded by the left and right side support plates 13 and the support side surfaces 12b.

  Press-fit pin insertion holes 16 are respectively provided on the left and right sides of the bottom surface 6. Further, an electric wire insertion hole 17 is formed so as to penetrate the inside and the outside of the cavity portion 7 of the socket body 1 at the left and right positions of the bottom surface 6. A pair of contact pieces 18 are accommodated in the cavity 7 of the socket body 1. Each of the pair of contact pieces 18 is made of a strip-shaped conductive material, that is, an electric conductor.

  Each contact piece 18 is twisted by 90 degrees in a substantially central portion in the longitudinal direction (more precisely, slightly on the side of the central portion), so that the surface A of one (upper surface portion 19) is the other (lower surface portion 20). A twisted portion 21 is formed so as to be orthogonal to the surface B. Further, the front end portion of the surface B of the lower surface portion 20 of each contact piece 18 is bent outward at a right angle to form a leg portion 23. Further, the central portion of the leg portion 23 of each contact piece 18 is cut and bent upward, and an inclined portion 24 is formed outward.

  Then, the pair of contact pieces 18 configured in this manner are put in the leg support space 15 of the socket body 1 with the respective leg portions 23 facing outward, the surface B of the lower surface portion 20 is face-to-face, and By arranging the contact lines 22 of the side edges located in the thickness direction of the upper surface portion 19 so as to face each other (orientated so that the surfaces A of the upper surface portion 19 are located on the same plane), as a whole, A spring structure having elasticity is formed. At this time, the surface B of the lower surface portion 20 is brought into contact with the support side surface 12 b of the central support portion 12, and the lower surface portion 20 of the contact piece 18 is held through the gap 14. In addition, the electric wire connection part 25 is provided in the leg part 23 of each contact piece 18, and the electric wire (not shown) penetrated in the electric wire insertion hole 17 is electrically connected.

  Then, by rotating the illuminating lamp 9a with the conductive pin 9 of the illuminating lamp 9a inserted into the conductive pin insertion hole 8, the conductive pin 9 comes into line contact or point contact with the contact line 22 of the contact piece 18, and the spring structure The contact piece 18 is elastically deformed against the urging force, and the illumination lamp 9a can be held by the illumination socket in a state where the conductive pin 9 is in contact with the contact piece 18.

  A back cover 26 is attached to the back surface of the socket body 1. A back cover locking portion 27 is provided on the top of the back cover 26. The back cover engaging portion 27 engages with the main body engaging portion 11 of the socket body 1 when the back cover 26 is attached to the socket body 1. In addition, press-fit pins 28 are respectively provided at the left and right positions of the lower portion of the back cover 26. These press-fit pins 28 are respectively inserted into the press-fit pin insertion holes 16 of the socket body 1 when the back cover 26 is attached to the socket body 1.

  An insulator 30 is provided on both or only one of the pair of contact pieces 18. The insulator 30 is provided so as to cover the surface of the contact piece 18 in particular. Specifically, the insulator 30 is a heat-resistant insulating film made of, for example, a thermosetting resin or an inorganic insulating film. The configuration of the contact piece 18 and the insulator 30 will be further described with reference to FIGS. 4 and 5.

  The insulator 30 is provided on the surface of the contact piece 18 except for a preset region. In the region where the insulator 30 is not provided on the surface of the contact piece 18, the contact piece 18 is exposed to the surface and the conductive region 40 is formed. The conductive region 40 in which the insulator 30 is not provided is a region having a preset allowable range d including the appropriate position 41.

  Here, the appropriate position 41 will be described. As described above, in order to attach the illuminating lamp 9a to the lighting socket, the illuminating lamp 9a is rotated in a state where the conductive pin 9 is inserted into the conductive pin insertion hole 8, and the elastic force of the spring structure of the contact piece 18 is used. The illumination lamp 9 a is held by sandwiching the pair of conductive pins 9 between the pair of contact pieces 18. At this time, there is a positional relationship between the contact piece 18 and the conductive pin 9 that can appropriately hold the conductive pin 9, that is, the illumination lamp 9 a, by the elastic force of the contact piece 18.

  In the example described in the first embodiment, when the contact piece 18 has a positional relationship in which the pair of conductive pins 9 are arranged along the direction to be sandwiched by the elastic force, the illuminating lamp 9a is used. Can be held properly. The contact position between the conductive pin 9 and the contact piece 18 that can appropriately hold the illumination lamp 9a is an appropriate position 41.

  The insulator 30 is provided at least in a portion of the surface of the contact piece 18 excluding the conductive region 40 including the proper position 41 and a portion where the conductive pin 9 can contact the insulator 30. “A portion where the conductive pin 9 can come into contact with the insulator 30” means that the conductive pin 9 is in contact with the surface of the contact piece 18 in the process of rotating the illuminating lamp 9a with the conductive pin 9 inserted into the conductive pin insertion hole 8. This is a portion that can contact the insulator 30.

  As described above, the insulator 30 is provided at least in a portion where the conductive pin 9 can contact the contact piece 18 except for the preset allowable range d including the proper position 41 on the surface of the contact piece 18. In addition, here, it is provided also in parts other than the conductive region 40 on the surface of the contact piece 18 and where the conductive pin 9 cannot contact the contact piece 18. This is mainly due to the convenience in the work process when the insulator 30 is provided on the surface of the contact piece 18.

  In order to assemble the lighting socket having the above configuration, first, it is attached to the bottom surface of the leg support space 15 with the leg part 23 of one contact piece 18 facing outward. Subsequently, the surface B of the lower surface portion 20 of each contact piece 18 is brought into contact with the support side surface 12b of the central support portion 12 so as to pass through the gap 14 and be held. Similarly, the other contact piece 18 is attached and held in the leg support space 15, and the pair of contact pieces 18 are disposed to face each other in the cavity portion 7.

  Next, the back cover 26 is covered from the rear of the socket body 1, and the back cover locking portion 27 is engaged with the body locking portion 11 of the socket body 1. Further, the press-fit pin 28 is press-fitted into the press-fit pin insertion hole 16 of the socket body 1 and coupled together. Then, the lighting socket is attached to a lighting fixture or the like, and the electric wire passed through the electric wire insertion hole 17 is connected to the electric wire connection portion 25 of each contact piece 18.

  To attach the illuminating lamp 9a to the lighting socket configured as described above, the conductive pin 9 is inserted from the insertion groove 10 of the socket body 1 and moved to the position of the conductive pin insertion hole 8 (solid line in FIG. 3). From this state, the illuminating lamp 9a is rotated, for example, in the direction of the arrow. In this way, each conductive pin 9 makes a line or point contact with the contact line 22 of the contact piece 18. At this time, the conductive pin 9 first contacts the insulator 30 of the contact piece 18.

  Then, when the illuminating lamp 9a is still rotated in the direction of the arrow, the conductive pin 9 elastically deforms the contact piece 18 having a spring structure in the outward direction against the urging force. At this time, the conductive pin 9 is in contact with the insulator 30 until the conductive pin 9 reaches the conductive region 40. When the conductive pin 9 reaches the conductive region 40, the conductive pin 9 comes into direct contact with the contact piece 18. Further, when the illuminating lamp 9a is rotated and the conductive pin 9 is rotated 90 degrees, the conductive pin 9 is in contact with the contact piece 18 at the appropriate position 41 (broken line in FIG. 3). When the rotation of the illumination lamp 9a is stopped at this position, the conductive pin 9 is held at that position and is electrically connected by the urging force of the pair of contact pieces 18.

  Thus, the lighting socket according to the present invention includes a pair of contact pieces 18 made of an electric conductor, and the pair of conductive pins 9 included in the illuminating lamp 9a is disposed between the pair of contact pieces 18. By rotating the illuminating lamps 9a, the respective conductive pins 9 are brought into contact with the respective contact pieces 18, and the illuminating lamps 9a are supported in a state where the conductive pins 9 are in contact with each other at the preset appropriate positions 41 of the contact pieces 18. It is supposed to be.

  Here, when the rotation of the illuminating lamp 9a is insufficient and the elastic force of the contact piece 18 acts on the conductive pin 9, but the conductive pin 9 is not within the allowable range including the appropriate position 41, that is, within the conductive region 40, the conductive pin 9 is in contact with the insulator 30 on the surface of the contact piece 18, and the conductive pin 9 and the contact piece 18 are not electrically connected. In addition, when the illuminating lamp 9a is rotated too much and the conductive pin 9 is out of the allowable range including the proper position 41, that is, the conductive region 40, the conductive pin 9 is in contact with the insulator 30, and the conductive pin 9 9 and the contact piece 18 are not electrically connected.

  That is, when the contact position of the conductive pin 9 to the contact piece 18 is not within the certain allowable range d from the appropriate position 41, the insulator 30 prevents the conductive pin 9 from contacting the contact piece 18, and the conductive pin 9 9 and the contact piece 18 are not electrically connected. On the other hand, when the contact position of the conductive pin 9 to the contact piece 18 is within a certain allowable range d from the appropriate position 41, the conductive pin 9 contacts the conductive region 40 of the contact piece 18 and contacts the conductive pin 9. The piece 18 is electrically connected.

  Therefore, if the contact position of the conductive pin 9 to the contact piece 18 is within a certain allowable range d from the appropriate position 41, the conductive pin 9 and the contact piece 18 are electrically connected, and power is supplied to the illumination lamp 9a. If the contact position of the conductive pin 9 to the contact piece 18 is not within a certain allowable range d from the appropriate position 41, the conductive pin 9 and the contact piece 18 can be turned on. Are not electrically connected and the lighting 9a cannot be turned on.

  As described above, when the contact position of the conductive pin 9 with the contact piece 18, that is, the rotation position of the illumination lamp 9a with respect to the socket body 1 has deviated from an appropriate position beyond a certain allowable range, the illumination is performed. Since the lamp 9a cannot be turned on, it is possible to reliably prevent use in such an inappropriate mounting state. Therefore, it is possible to prevent heat generation due to poor contact between the conductive pin 9 and the contact piece 18 due to incomplete insertion (insufficient or excessive rotation) at the time of replacement of the illumination lamp 9a.

  In order to prevent power supply to the illuminating lamp 9a, it is not always necessary to provide the insulator 30 on both the pair of contact pieces 18. That is, by providing the insulator 30 on at least one of the pair of contact pieces 18, it is possible to obtain the same effect as described above. At this time, the manufacturing process of providing the insulator 30 on the contact piece 18 can be reduced, and the necessary amount of the insulator 30 can be reduced and reduced, so that an increase in cost can be suppressed to a necessary minimum.

  Furthermore, in order to support the conductive pins 9 at both ends of the illuminating lamp 9a, two illumination sockets are required for one illuminating lamp 9a. If the insulator 30 is provided for the contact piece 18 included in at least one of the lighting sockets, the same effect can be obtained.

  At this time, as described above, by using a heat-resistant insulating film as the insulator 30, even if heat is generated due to poor contact between the conductive pin 9 and the contact piece 18, the insulating film melts. Damage can be prevented, and an increase in contact failure due to melting of the insulating coating can be prevented.

  In addition, what is necessary is just to operate in the reverse procedure to the case where the illumination light 9a is attached in order to remove the illumination light 9a. That is, when the conductive pin 9 of the illuminating lamp 9a is rotated in the same direction or in the opposite direction as when it is attached and stopped when the conductive pin 9 is rotated 90 degrees, the conductive pin 9 is released from the contact piece 18 and becomes free. The spring-structured contact piece 18 returns to the state indicated by the solid line from the position indicated by the broken line by the urging force. In this state, the illuminating lamp 9a can be removed by pulling out the conductive pin 9 of the illuminating lamp 9a from the insertion groove 10.

Embodiment 2. FIG.
FIGS. 6 to 8 relate to Embodiment 2 of the present invention, FIG. 6 is an enlarged view of a main part showing an example of a contact piece provided in the lighting socket, and FIG. 7 shows another contact piece provided in the lighting socket. The principal part enlarged view which shows an example, FIG. 8: is a principal part enlarged view which shows another example of the contact piece with which the socket for illumination is equipped.

  In the second embodiment described here, in the configuration of the first embodiment described above, a groove-like recess to be engaged with the conductive pin 9 is formed at an appropriate position 41 of the contact piece 18. The second embodiment will be described with an example. First, FIG. 6 shows a first example. In the first example, a semicircular recess 42 is formed in the conductive region 40 of the contact piece 18. The semicircular recess 42 is provided at an appropriate position 41. More specifically, the semicircular recess 42 is arranged so that the center of the semicircle of the semicircular recess 42, that is, the deepest position of the recess is located at the appropriate position 41.

  Next, FIG. 7 shows a second example. In the second example, a triangular recess 43 is formed in the conductive region 40 of the contact piece 18. The triangular recess 43 is provided at an appropriate position 41. More specifically, the triangular concave portion 43 is arranged so that the apex of the triangular concave portion 43, that is, the deepest position of the concave portion is located at the appropriate position 41.

  According to the lighting socket configured as in the first example or the second example described above, when the conductive pin 9 comes to the proper position 41, the conductive pin 9 is placed inside the semicircular recess 42 or the triangular recess 43. Enters the semicircular concave portion 42 or the triangular concave portion 43, so that the conductive pin 9 can be prevented from being displaced from the proper position 41, and the conductive pin 9 can be securely attached at the proper position 41. In addition, the operator who replaces the illumination lamp 9a can feel that the conductive pin 9 has reached the appropriate position 41 and has entered the semicircular recess 42 or the triangular recess 43 inside. The operator can be prompted to stop the rotation of the illumination lamp 9a at the position where the conductive pin 9 is at the proper position 41.

The third example shown in FIG. 8 is slightly different from the first and second examples described above. In the third example, no groove is provided directly in the contact piece 18 as in the first and second examples. Instead, a step is formed at the boundary between the conductive region 40 and the insulator 30 by increasing the thickness of the portion of the insulator 30 that can contact the conductive pin 9 in particular. Also by doing in this way, it is possible to form the stepped recess 44 in the conductive region 40 portion and obtain the same effect as the first example and the second example.
Other configurations are the same as those in the first embodiment, and detailed description thereof is omitted.

Embodiment 3 FIG.
FIGS. 9 to 13 relate to Embodiment 3 of the present invention, FIG. 9 is an exploded perspective view of the lighting socket, FIG. 10 is a longitudinal sectional view of the lighting socket, and FIG. 11 is from the back of the lighting socket. FIG. 12 is an enlarged view of the main part of the contact piece provided in the lighting socket, and FIG. 13 is an arrow view of the contact piece seen from the direction of arrow E shown in FIG.

  In the first embodiment described above, each contact piece 18 is twisted in the middle. On the other hand, in the third embodiment described here, each contact piece 18 is left in a straight plate shape.

  That is, in the third embodiment, the illumination socket is configured as shown in FIGS. 9 to 11 as a whole. Thus, each contact piece 18 is extended in a plate shape except that each contact piece 18 is bent outward to form the leg portion 23. And the part which contacts the conductive pin 9 especially of the contact piece 18 is comprised as shown in FIG.12 and FIG.13.

  That is, the insulator 30 is provided on both or only one of the pair of contact pieces 18. The insulator 30 is provided so as to cover the surface of the contact piece 18 in particular. The insulator 30 is provided on the surface of the contact piece 18 except for the conductive region 40 set in advance. In the conductive region 40, the contact piece 18 is exposed on the surface. The conductive area 40 is an area having a preset allowable range d including the proper position 41. The appropriate position 41 is a contact position between the conductive pin 9 and the contact piece 18 that can appropriately hold the illumination lamp 9a.

In this way, the insulator 30 is at least a portion on the surface of the contact piece 18 excluding the conductive region 40 including the proper position 41 and at a portion where the conductive pin 9 can contact the insulator 30. .
Other configurations are the same as those in the first embodiment, and detailed description thereof is omitted.

  The lighting socket configured as described above can achieve the same effects as those of the first embodiment while simplifying the configuration of the contact piece.

  DESCRIPTION OF SYMBOLS 1 Socket body, 2 Front plate, 3 1st side surface, 4 2nd side surface, 5 Upper surface, 6 Bottom surface, 7 Hollow part, 8 Conductive pin insertion hole, 9 Conductive pin, 9a Illumination lamp, 10 Insertion groove, 11 Main body connection Stop part, 12 center support part, 12a support upper surface, 12b support side surface, 13 side part support plate, 14 gap, 15 leg support space, 16 press-fit pin insertion hole, 17 wire insertion hole, 18 contact piece, 19 upper surface part, 20 Lower surface part, 21 Twist part, 22 Contact line, 23 Leg part, 24 Inclined part, 25 Electric wire connection part, 26 Back cover, 27 Back cover latching part, 28 Press-fit pin, 30 Insulator, 40 Conductive region, 41 Appropriate Position, 42 semicircular recess, 43 triangular recess, 44 step recess

Claims (4)

A pair of contact pieces made of an electric conductor is provided, and the illumination lamp is rotated in a state in which a pair of conductive pins of the illumination lamp is disposed between the pair of contact pieces. In the lighting socket for holding the illuminating lamp by the elastic force of the contact piece in a state in which the conductive pin is contacted, and the conductive pin is in contact with each other at a preset appropriate position of the contact piece ,
Comprising an insulator provided to cover the surface of the contact piece;
The insulator has a predetermined allowable range including the proper position on the surface of the contact piece. The conductive pin can contact the insulator , and the elastic force of the contact piece can be applied to the conductive pin. A socket for lighting provided at least on a portion where can operate.   The lighting socket according to claim 1, wherein the insulator is provided on only one of the pair of contact pieces.   The lighting socket according to claim 1, wherein the insulator is a heat-resistant insulating film made of a thermosetting resin or an inorganic insulating film.   The lighting socket according to any one of claims 1 to 3, wherein a groove-like recess that engages with the conductive pin is formed at the appropriate position of the contact piece.

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