JP4783262B2 - Lamp socket and lighting fixture - Google Patents

Description

  The present invention relates to a lamp socket to which a straight tube type lamp is attached and a lighting fixture using the lamp socket.

  2. Description of the Related Art Conventionally, there has been provided a lamp socket to which a lamp such as a fluorescent lamp, which is a straight tube type and has terminal pins at both ends in an axial direction, is attached (for example, see Patent Document 1).

  For example, as shown in FIG. 5, the terminal pin La1 of the straight tube lamp La is held on the inner surface of the cylindrical connecting portion La2. Moreover, the lamp socket corresponding to the lamp La of FIG. 5 has the connection recessed part 10 in which the connection part La2 is inserted, as shown to FIG. 6 (a) (b). As the contact 3 provided in this kind of lamp socket and in contact with the terminal pin La1, as shown in FIGS. 6 (a) and 6 (b), in addition to the contact 3 which contacts the tip of the terminal pin La1 from the axial direction of the lamp La. As shown in FIGS. 7A and 7B, there is one that contacts the side surface of the terminal pin La1 from the direction intersecting the axial direction of the lamp La.

  As a lighting fixture using this type of lamp socket, for example, as shown in FIG. 8, a fixture main body 2 attached to a mounting surface (not shown) such as a ceiling surface, and a connection concave portion 10, respectively, are contactors. 3 is provided with a movable side socket 1a and a fixed side socket 1b as lamp sockets fixed to the appliance main body 2 while holding 3.

The movable-side socket 1a has a socket body 4 fixed to the instrument body 2 and a connection recess 10, and the contact 3 is held in the connection recess 10 so that it can be displaced in the axial direction of the lamp La with respect to the socket body 4. A held plunger 5 and a return spring (not shown) that urges the plunger 5 in a direction approaching the fixed socket 1b are provided. In attaching the lamp La, first, one connecting portion La2 of the lamp La is inserted into the movable socket 1a, and the plunger 5 is pushed into the socket body 4 against the spring force of the return spring in the movable socket 1a. The other connection portion La2 of the lamp La is inserted into the fixed side socket 1b. Then, when the plunger 5 is returned by the spring force of the return spring, the connection portion La2 of the lamp La is inserted into the connection recess 10 respectively, and the terminal pin La1 is brought into contact with the contactor 3.
JP-A-5-29047

  Here, in the example of FIGS. 7A and 7B, in order to provide the contactor 3 with a spring property and ensure a contact pressure with the terminal pin La2, the material of the contactor 3 is relatively springy. Although a spring material which is a high material is used, since the spring material has a relatively high electric resistance, the amount of heat generation increases and the power consumption increases. However, if a material having a low spring property is used as the material of the contact 3 in order to keep the electrical resistance of the contact 3 low, the contact pressure between the contact 3 and the terminal pin La1 (hereinafter simply referred to as “contact pressure”). ), A separate contact pressure spring that presses the contact 3 against the terminal pin La1 is required, and the number of parts increases.

  On the other hand, when the contact 3 is brought into contact with the tip of the terminal pin La1 as shown in FIGS. 6 (a) and 6 (b), the contact spring 3 is made of a material having a low electric resistance as the material of the contact 3 and the contact pressure is applied by the return spring. Can be secured. However, in this case, the contact pressure decreases with the decrease in solder, which often adheres to the tip of the terminal pin La1, and the contact pressure is reduced by the dimensions of the lamp La and the mounting positions of the lamp sockets 1a and 1b. The contact pressure is not stable because it is easily affected by variations in the

  The present invention has been made in view of the above-mentioned reasons, and an object of the present invention is to use a lamp socket in which the contact pressure between the contact and the terminal pin is stable and the use of a spring material as the contact is unnecessary, and the lamp socket. It is to provide the lighting equipment that was.

According to the first aspect of the present invention, there is provided a socket body fixed to a fixture body of a lighting fixture, and a terminal pin at one end of a lamp among terminal pins projecting axially outward from both ends of a straight tube type lamp. A plunger having a connection recess into which the pin is inserted and held slidably in the depth direction of the connection recess with respect to the socket body, and a contact held in the connection recess of the plunger and in contact with the terminal pin of the lamp And a return spring that biases the plunger in a direction to pull out the lamp terminal pin from the connection recess, and the contact is biased by the return spring in a direction to pull out the lamp terminal pin from the connection recess. and parts, and the fulcrum portion urging portion is converted into a rotational force for rotating the contact force received from the return spring by coming into contact with the plunger on the opposite side of the bottom surface of the connection recess, run in the terminal pins of the lamp And a contact portion for contacting by the rotational force against the plane along the axial direction of the plunger, before the sites are orthogonal at the tip surface of the terminal pins in the depth direction of the connecting recess is in contact with the contacts It has a restricting part that abuts against the lamp and prohibits displacement of the terminal pin in the insertion direction with respect to the connection recess, and in the contact, the terminal pin of the lamp is inserted into the connection recess until the position where the restriction part of the plunger contacts the lamp. The surface in contact with the terminal pin in this state is only the surface in the direction orthogonal to the depth direction of the connection recess when the lamp is connected.

  According to the present invention, since the contact contacts the surface of the lamp terminal pin along the axial direction of the lamp, the contact pressure is more stable than when the contact contacts the tip of the terminal pin. Further, since the contact is urged by the return spring, it is not necessary to use a spring material as the contact, so that the electrical resistance of the contact can be easily kept low. Furthermore, since the tip of the terminal pin does not contact the contact, the operation is more stable than when the contact receives a force in the insertion direction from the terminal pin.

The invention of claim 2 is an illumination fixture to which a straight tube type lamp having terminal pins protruding outward in the axial direction from both ends in the axial direction is attached, and is fixed to the fixture main body and the fixture main body, respectively. is provided with at least one pair of lamp sockets each end portion in the axial direction of the lamp is mounted, at least one of the lamp socket, characterized in that 1 Symbol placement of the lamp socket according to claim is used.

  According to the first aspect of the present invention, since the contact contacts the surface of the lamp terminal pin along the axial direction of the lamp, the contact pressure is more stable than when the contact contacts the tip of the terminal pin. Further, since the contact is urged by the return spring, it is not necessary to use a spring material as the contact, so that the electrical resistance of the contact can be easily kept low. Furthermore, since the tip of the terminal pin does not contact the contact, the operation is more stable than when the contact receives a force in the insertion direction from the terminal pin.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  This embodiment is a movable socket 1a used in the lighting fixture of FIG. 8, and as shown in FIG. 2, a socket main body 4 fixed to the fixture main body 2 and a connection portion La2 of the lamp La are inserted. A plunger 5 having a connection recess 10 and slidably held in the axial direction of the lamp La (that is, the depth direction of the connection recess 10) with respect to the socket body 4, and held in the connection recess 10 of the plunger 5. And a contactor 3 that is in contact with the terminal pin La1 of the lamp La. In the following description, the top, bottom, left, and right are based on FIG. 2, and the direction in which the connection portion La2 of the lamp La is removed in the depth direction of the connection recess 10 (upper right direction in FIG. 2) is referred to as the front.

  Locking grooves 40c are provided on the left and right surfaces of the upper end portion of the socket body 4 over substantially the entire length of the socket body 4 in the front-rear direction, and the socket body 4 is formed with a locking protrusion ( (Not shown) is supported by the instrument body 2 by engaging with the locking groove 40c.

  Further, as shown in FIG. 3, the socket body 4 is made of a thermoplastic resin and includes a socket base 41 having a housing recess 40a (see FIG. 4) in which the plunger 5 can be accommodated, and a plunger 5 made of a thermoplastic resin. And a socket cover 42 attached to the front side of the socket base 41 with a plunger insertion hole 40b.

  Two return springs 6 made of compression coil springs and biasing the plunger 5 forward are housed in the housing recess 40a. Two positioning projections 40d (see FIG. 4) that are inserted into the return spring 6 and position the return spring 6 are respectively forward (upward in FIG. 4) on the bottom surface (rear inner surface) of the storage recess 40a. Projected.

  The socket cover 42 includes a main body portion 42a having a plunger insertion hole 40b opened on the front surface, and a convex base portion 42b provided on the upper side of the main body portion 42a and having a front surface protruding forward from the front surface of the main body portion 42a. A total of four wire insertion holes 40e into which two wires (not shown) are inserted are inserted in the front and back of the convex base part 42b, two in each of the two portions.

  The socket base 41 and the socket cover 42 include, for example, a main body portion 42a of the socket cover 42 that fits into the housing concave portion 40a, and a coupling convex portion 42c that projects from the outer surface of the main body portion 42a of the socket cover 42. They are coupled to each other by engaging with a coupling recess (not shown) provided on the inner surface of the storage recess 40a.

In addition, the socket body 4, two conductive plates 7 for electrically connecting the electric wire is inserted from the wire insertion hole 40 e respectively and contacts 3 are housed. The conductive plate 7 is formed by punching and bending a metal plate, for example, and a terminal portion 71 to which an electric wire is connected, a contact portion 72 in contact with the contact 3, a terminal portion 71 and the contact portion 72. And a connecting portion 73 having a central portion bulging rearward.

The terminal part 71 is formed by cutting and raising a U-shaped terminal piece 71a whose rear side is opened from the left and right sides and a center part of the terminal piece 71a rearward, and a lower end thereof is connected to the terminal piece 71a and is directed upward. And a locking spring piece 71b inclined rearward. The locking spring piece 71b is elastically deformable so that the tip end (upper end) is displaced back and forth with respect to the terminal piece 71a. Wire inserted from the wire insertion hole 40 e is introduced between the upper surface of the upper inner surface and lock spring pieces 71b of the terminal pieces 71a, eventually leading end reaches the rearward of the front end of the locking spring piece 71b The locking spring piece 71b is prevented from coming off when biting. Here, each terminal portion 71 of each conductive plate 7 faces two electric wire insertion holes 40e, and is inserted into two electric wire insertion holes 40e opened toward the terminal portion 71 of the same conductive plate 7. The electric wires are electrically connected to each other through the conductive plate 7. That is, one of the two electric wire insertion holes 40e can be used for the feed wiring.

  In the contact portion 72, an insertion hole 72a through which the rear end portion of the contact 3 is inserted is provided in the front-rear direction. In addition, the connecting portion 73 is smaller in size on the left and right sides than the terminal portion 71 and the contact portion 72 so that the contact portion 72 can be elastically deformed to maintain the close contact of the contact portion 72 with the contact 3.

  The contact 3 is inserted into the insertion hole 72 a of the conductive plate 7 and inserted into the return spring 6. The spring 3 is provided on the front side of the spring connection 31 and protrudes left and right beyond the spring connection 31. A receiving portion 32 and a contact portion 33 projecting forward from the spring receiving portion 32 on the inner side in the left-right direction than the spring connecting portion 31 are in contact with and connected to the terminal pin La1 of the lamp La. The left and right dimensions of the spring receiving portion 32 are larger than the outer diameter of the return spring 6, and the contact 3 receives the spring force of the return spring 6 through the contact portion 72 of the conductive plate 7 on the rear surface of the spring receiving portion 32. It has become.

  The plunger 5 is made of a thermosetting resin, and has a main body 51 that is long on the left and right and that has a connection recess 10 opened on the front surface, and a convex portion 52 that protrudes from both the upper and lower surfaces of the main body 51 and is long in the front and rear. The plunger insertion hole 40b has a cross shape when viewed from the front.

  Further, as shown in FIG. 4, two spring receiving recesses in which the spring receiving portion 32 and the spring coupling portion 31 of the contactor 3 are accommodated and the front end portion of the return spring 6 is accommodated on the rear surface of the plunger 5. 51a are provided side by side on the left and right.

  Furthermore, contact insertion holes 51b for communicating the spring receiving recesses 51a and the connecting recesses 10 are provided in the front and the rear of the bottom surfaces of the spring receiving recesses 51a. The contact insertion hole 51b is dimensioned so that the contact portion 33 of the contact 3 can be inserted and the spring receiving portion 32 cannot be inserted. The contact portion 33 of the contact 3 is connected to the connection recess 10 through the contact insertion hole 51b. Protrusively inside. The plunger 5 receives the spring force of the return spring 6 via the spring receiving portion 32 of the contact 3 and returns to a position protruding forward from the front surface of the main body portion 42 a of the socket cover 42.

  Further, a connection convex portion 11 to be inserted into the connection portion La2 of the lamp La protrudes from the central portion of the bottom surface of the connection concave portion 10, and the contact portion 33 of the contact 3 is respectively provided on the left and right surfaces of the connection convex portion 11. A guide groove 11 a that is partially inserted and guides the contact 3 is provided.

The operation of this embodiment will be described. In a state in which the lamp La is not connected as shown in FIG. 4, each of the contacts 3, a spring receiving portion 3 2 is subjected to spring force of the return spring 6 spring receiving recess 51a bottom surface (the upper side in FIG. 4 By being pressed against the inner surface), the upright posture shown in FIG. 4 is taken. Here, in each contactor 3, the laterally outer surface of the front end portion is a convex curved surface, and the front end surface (upper end surface in FIG. 4) of the contact portion 33 of each contactor 3 is rearward (in FIG. 4). It is an inclined surface that is inclined outwardly in the left-right direction (downward), that is, in the direction in which the protruding dimension into the connection recess 10 increases toward the insertion direction of the connection portion La2 of the lamp La. The inclined surface protrudes outward in the left-right direction from the guide groove 11a, and is in a position where the terminal pin La1 contacts when the connection portion La2 of the lamp La is inserted into the connection recess 10. When the lamp La in the connecting portion La2 is inserted into the connection recess 10, as shown in FIG. 1, by the inclined surface receives the pushing force from the terminal pins La1, contacts 3, spring receiving portion 3 2 In the direction of entering the guide groove 11a with a contact point between the outer edge of the left and right direction and the bottom surface of the spring receiving recess 51a as a fulcrum (that is, in FIG. 1, the left contact 3 is clockwise and the right contact 3 is counterclockwise) Around). At this time, each return spring 6 functions as a bending coil spring, and the contact 3 receives the spring force of the return spring 6 at the inner end in the left-right direction and is urged in the opposite direction. That is, the contact portion 33 of each contact 3 is elastically contacted with the terminal pin La1 from the inner side in the left-right direction, which is the direction intersecting the insertion direction of the connection portion La2. Further, in the contact 3, a fulcrum end portion of the left-right direction outer side of the spring receiving portion 3 2 in the claims, the end portions of the right and left inward of the spring receiving portion 3 2 is a biasing unit in the claims.

  Here, the size and shape of each contactor 3 is designed so that it does not contact the front end of the terminal pin La1 when the periphery of the connection portion La2 of the lamp La is in contact with the front end surface of the plunger 5. That is, in the plunger 5, the front end portion is the limiting portion in the claims. Further, since the laterally outer surface of the front end portion of each contactor 3 is a convex curved surface, in each contactor 3, the connecting portion of the lamp La to the position where the front end portion of the plunger 5 contacts the lamp La. A surface that contacts the terminal pin La1 in a state where La2 is inserted into the connection recess 10 is only a surface that is perpendicular to the depth direction of the connection recess 10 (left-right direction in FIG. 4).

  According to the above configuration, each contact 3 is elastically contacted with the terminal pin La1 from the direction intersecting the insertion direction of the connection portion La2, so that each contact 3 is in contact with the rear end of the terminal pin La1. The contact pressure between the contact 3 and the terminal pin La1 is stabilized because it is not easily affected by variations in the dimensions of the lamp La and the mounting positions of the sockets 1a and 1b. Further, since the contact pressure is obtained by the return spring 6 in each contact 3, it is not necessary to use a spring material as the material of the contact 3, and a contact pressure spring for obtaining the contact pressure is separately provided. Since the number of parts is reduced as compared with the case, the manufacturing cost can be reduced.

Further, since the tip (rear end) of the terminal pin La1 does not contact the contact 3, the contact 3 is not pushed backward (downward in FIGS. 1 and 4) by the terminal pin La1, and the contact since 3 of contact between the spring receiving portion 3 2 and the plunger 5 which is a fulcrum of rotation is stable, hardly occurs caught in the operation of the contact 3, the operation is stabilized.

It is sectional drawing which shows the state in which the lamp | ramp was connected in embodiment of this invention. It is a perspective view which shows the same as the above. It is a disassembled perspective view which shows the same as the above. It is sectional drawing which shows the state where the lamp | ramp is not connected in the same as the above. It is the side view partly fractured which shows an example of the shape of the connection part of a lamp | ramp. (A) (b) shows the principal part of a prior art example, respectively (a) is a front view, (b) is the II sectional drawing of (a). (A) and (b) each show the principal part of another prior art example, (a) is a front view, (b) is a roll sectional view of (a). It is a perspective view which shows an example of a lighting fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Movable side socket 1b Fixed side socket 2 Instrument body 3 Contact 4 Socket body 5 Plunger 6 Return spring 10 Connection recessed part 32 Spring receiving part 33 Contact part La Lamp La1 Terminal pin

Claims (2)

A socket body fixed to the fixture body of the lighting fixture, and a connection recess into which a terminal pin at one end of the lamp is inserted from both end portions of the straight tube type lamp protruding outward in the axial direction. A plunger that is slidably held in the depth direction of the connection recess with respect to the socket body, a contact that is held in the connection recess of the plunger and that is in contact with the terminal pin of the lamp, and the lamp from the connection recess A return spring that biases the plunger in the direction of pulling out the terminal pin of
The contact is received by the biasing portion from the return spring by abutting the plunger on the opposite side of the bottom surface of the connection recess, and the biasing portion biased by the return spring in the direction of pulling out the terminal pin of the lamp from the connection recess . includes a fulcrum portion for converting the rotational force for rotating the contact force, and a contact portion which contacts with the rotational force of the against the plane along the axial direction of the lamp at the terminal pins of the lamp,
The plunger has a restricting portion that prohibits displacement of the terminal pin in the insertion direction with respect to the connection recess by abutting against the lamp before a portion perpendicular to the depth direction of the connection recess contacts the contact on the tip surface of the terminal pin. And
In the contact, the surface that contacts the terminal pin in a state where the terminal pin of the lamp is inserted into the connection recess until the limit portion of the plunger contacts the lamp is in the depth direction of the connection recess with the lamp connected. A lamp socket characterized in that it is only a surface oriented in an orthogonal direction. A luminaire to which a straight tube type lamp in which terminal pins protrude outwardly in the axial direction from both ends in the axial direction is attached,
An appliance body, and at least one set of lamp sockets each fixed to the appliance body and attached to one end of the lamp in the axial direction;
The lamp socket according to claim 1 is used for at least one of the lamp sockets.

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