JPH0982435A - Socket for baseless bulb, baseless bulb device and lighting system using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for a baseless bulb which can be tilted by only inserting straight a socket main body merely into a socket mounting hole even when the feeding terminal of a circuit board is formed either in the inner surface of the socket mounting hole or in the lower surface of the circuit board. SOLUTION: An electrically conductive terminal 30 having a flange side connecting piece 31 and a cylinder side connecting piece 32 is fitted to a socket main body 11 in which a baseless bulb is inserted into one end of a cylinder part 12 and a flange part 13 is formed in the side surface, and a first and a second power source introducing contact parts 33, 34 are respectively provided in the flange side connecting piece 31 and the cylinder side connecting piece 32. When the socket main body 11 is inserted into the socket mounting hole 41 of a circuit board 40, one 33 of the power source introducing contact parts is brought into contact with a first feeding terminal 44 provided in the inner surface of the socket mounting hole 41, and the other power source introducing contact part 34 is brought into contact with a second feeding terminal 45 provided in the lower surface of the circuit board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a socket for a baseless light bulb suitable for mounting on a circuit board such as a printed circuit board or a flexible board, and a baseless light bulb device comprising a combination of the socket and the baseless light bulb. The present invention also relates to a lighting device configured by mounting the baseless bulb device on a circuit board.

[0002]

2. Description of the Related Art A baseless electric bulb is used as a display lamp for illuminating or displaying the instrument panel of a driver's seat in an automobile. This type of baseless bulb uses a dedicated socket for the instrument panel. Mounted on.

The socket for the baseless bulb is designed to be mounted on a printed circuit board arranged on the back side of the instrument panel. Therefore, the conventional socket is actually fair 1-1.
As described in Japanese Unexamined Patent Publication No. 9839, a cylindrical socket body is provided, and a lamp insertion hole into which the sealing portion of the baseless bulb is inserted is formed at one end of the socket body. A flange portion is formed on the outer periphery of the other end of the socket body, and a pair of locking protrusions is formed on the outer periphery of the cylindrical portion with respect to the flange portion. The circuit board is held between the flange and the locking projection.

A pair of electric contact pieces are housed in the lamp insertion hole, and these electric contact pieces hold the sealed portion of the baseless bulb inserted in the lamp insertion hole.
The electrical contact piece is adapted to make electrical contact with the lead wire attached to the sealing portion of the baseless bulb,
It has a connecting tongue extending on the upper surface of the flange portion.
When the circuit board is held by the flange portion and the locking projection, the connecting tongue extending on the upper surface of the flange portion comes into contact with the power supply terminal formed on the lower surface of the circuit board.

[0005]

However, the socket for a baseless electric bulb having such a structure has a structure in which the connecting tongue extending on the upper surface of the flange portion comes into contact with the power supply terminal formed on the lower surface of the circuit board. Therefore, unless the flange portion is strongly pressed against the lower surface of the circuit board, the contact pressure between the connection tongue and the power supply terminal becomes insufficient, and it becomes impossible to maintain a stable energized state. Therefore, the circuit board is sandwiched between the flange portion formed on the socket body and the pair of locking protrusions formed on the outer circumference of the cylindrical portion. At the time of this holding, the socket body is inserted into the socket mounting hole formed on the circuit board, and at the same time, the pair of locking projections are inserted through the relief grooves formed on the inner surface of the socket mounting hole.
By rotating the socket with respect to the circuit board in this state, the circuit board is mechanically held between the flange portion and the pair of locking projections.

Therefore, since such an attachment structure involves insertion and rotation of the socket, the number of operations is large, and the operation of attaching and detaching the socket is troublesome. In this case, if the amount of rotation is insufficient, the posture of holding the circuit board between the flange portion and the locking projection becomes unstable, and if vibration or the like is applied, the socket is not easily detached, and the connection tongue And causes poor contact between the power supply terminals.

Further, in such a structure, it is necessary to form a power supply terminal on the lower surface of the circuit board around the socket mounting hole, and a large space is required on the lower surface of the circuit board surrounding the socket mounting hole. . Further, when the socket is rotated as described above, a space is required around the mounting portion of the circuit board to allow the rotation.

Therefore, when arranging a plurality of sockets close to each other, there is a concern that adjacent sockets and power supply terminals may interfere with each other. In order to avoid this, it is necessary to secure a large gap between the adjacent sockets. There is also a problem that the space becomes large.

Therefore, a socket structure has been studied in which the socket can be mounted on a circuit board by simply inserting the socket linearly into the socket mounting hole without rotating the socket. At the same time, a structure has been considered in which a power supply terminal is formed on the inner surface of a socket mounting hole on the circuit board side, and a conductive terminal on the socket side makes contact with the power supply terminal to establish electrical connection.

However, since the existing circuit board is a conventional type in which the power supply terminal is formed on the lower surface of the board near the socket mounting hole, the socket having a structure connectable to the power supply terminal formed on the inner surface of the socket mounting hole Then, it is dedicated to it, and thus there arises a problem that it cannot be used for a circuit board having an existing structure. That is, when the socket for the baseless bulb attached to the circuit board having the existing structure needs to be replaced with a new socket, there is a problem in that the socket currently under study and study cannot be applied.

Therefore, the present invention is a circuit board which can be linearly inserted into and removed from a circuit board without rotation operation and can be mounted, and in which the power supply terminal is formed on the inner surface of the socket mounting hole. , Or an existing circuit board formed on the lower surface of the board near the socket mounting hole, can be used for any circuit board, a socket for a baseless bulb and a baseless bulb device, and a lighting device using the same Is to provide.

[0012]

[Means for Solving the Problems]

[Structure of the Invention] The invention according to claim 1 has a cylindrical portion, and a lamp insertion hole for inserting a baseless electric bulb is opened at one end of the cylindrical portion, and a flange portion is formed on a side surface of the cylindrical portion. A socket body; a tube-side connecting piece attached to the tube portion and a flange-side connecting piece arranged on the flange portion, and a power supply terminal facing the tube-side connecting piece. A conductive terminal having a contactable first power supply introduction contact portion and a second power supply introduction contact portion formed on the flange-side connection piece and capable of contacting a power supply terminal facing the flange-side connection piece. A socket for a baseless bulb, characterized by comprising:

According to a second aspect of the present invention, the cylindrical portion of the socket body is formed with an insertion groove into which the side edge portion of the cylindrical connecting piece is inserted along the axial direction of the cylindrical portion, and the flange portion. The socket for a baseless bulb according to claim 1, wherein the socket has a fitting recess into which the flange-side connecting piece is fitted.

According to a third aspect of the present invention, at least one of the first power supply introduction contact portion formed on the cylinder side connection piece and the second power supply introduction contact portion formed on the flange side connection piece is elastically deformed. The socket for a baseless electric bulb according to claim 1 or 2, wherein the socket has a free end that is possible.

According to a fourth aspect of the present invention, when the first power source introducing contact portion formed on the cylinder-side connecting piece has a free end which is elastically deformable, the free end is the same as the first power source introducing contact portion. The socket for a baseless bulb according to claim 3, wherein the socket is provided at a position closer to the flange portion than a connecting portion with the cylinder-side connecting piece.

According to a fifth aspect of the present invention, there is provided a locking projection for holding the circuit board with the upper surface of the flange portion when the cylindrical portion of the socket body is inserted into the socket mounting hole formed in the circuit board. It is provided, The socket for baseless electric bulbs of any one of Claim 1 thru | or 4 characterized by the above-mentioned.

According to a sixth aspect of the invention, there is provided the socket for a baseless electric bulb according to the fifth aspect, wherein the locking projection is formed on the socket body. The invention according to claim 7 is the socket for a baseless electric bulb according to claim 5, wherein the locking projection is formed on a cylindrical side connecting piece of the conductive terminal.

According to an eighth aspect of the present invention, the conductive terminal is provided with a holding portion for holding a sealing portion of the baseless bulb and a holding piece electrically connected to a lead wire attached to the sealing portion. The socket for a baseless electric bulb according to claim 1, wherein the socket is for a baseless bulb.

The invention of claim 9 comprises a socket for a baseless electric bulb according to any one of claims 1 to 8; and a baseless electric bulb inserted into a lamp insertion hole of the socket. Is a baseless bulb device.

A tenth aspect of the present invention is the baseless bulb device according to the ninth aspect, wherein the lead wire of the baseless bulb is welded to the conductive terminal. Claim 11
The invention of claim 8 and a socket for a baseless bulb according to claim 8;
The socket was inserted into the lamp insertion hole of the socket, and the sealing portion was held by the holding piece of the conductive terminal, and the lead wire attached to the sealing portion was electrically connected to the holding piece. A baseless bulb device comprising: a baseless bulb.

A twelfth aspect of the present invention includes a baseless light bulb device according to any one of the eighth to tenth aspects; and a socket mounting hole into which a cylindrical portion of a socket body of the baseless light bulb device is inserted. The first power supply terminal formed on the inner surface of the socket mounting hole and contacting the first power supply contact portion of the socket for the baseless bulb and the bottom surface near the socket mounting hole for the baseless bulb And a circuit board having at least one power supply terminal of the second power supply terminals with which the second power supply contact portion of the socket is in contact.

According to the first aspect of the invention, when the socket body is inserted into the socket mounting hole formed in the circuit board, the circuit board has the first power supply terminal formed on the inner surface of the socket mounting hole. In this case, the first power supply contact portion formed on the tubular-side connecting piece of the conductive terminal contacts the first power supply terminal, and the circuit board forms the second power supply terminal on the lower surface near the socket mounting hole. In this case, the second power supply introduction contact portion formed on the flange-side connection piece of the conductive terminal contacts the second power supply terminal.

Therefore, the case where the power supply terminal of the circuit board is formed on the inner surface of the socket mounting hole (first power supply terminal) or the case where the power supply terminal is formed on the lower surface of the circuit board (second power supply terminal) Even in the above case, by linearly inserting the socket body into the socket mounting hole of the circuit board, either one of the power supply introduction contact parts comes into contact with the one power supply terminal facing the power supply introduction contact part.

Therefore, it suffices to simply insert the socket body into the socket mounting hole of the circuit board in a straight line, the workability of insertion / removal is improved, and the space for rotation is also unnecessary. According to the invention of claim 2, the side edge portion of the cylinder-side connecting piece is inserted into the insertion groove formed in the cylinder portion of the socket main body along the axial direction of the cylinder portion, and the fitting formed in the flange portion. Since the flange-side connecting piece is fitted in the recess, the conductive terminal can be securely fixed to the socket body.

According to the invention of claim 3, at least one of the first power supply introduction contact portion formed on the cylinder side connection piece and the second power supply introduction contact portion formed on the flange side connection piece is elastically deformed. Since it has possible free ends, the free ends of these power supply introduction contact parts come into elastic contact with the power supply terminals on the circuit board side, and a high contact pressure can be obtained.

According to the fourth aspect of the present invention, the free end of the first power supply introduction contact portion formed on the cylinder-side connection piece is more flanged than the connecting portion between the power supply introduction contact portion and the cylinder-side connection piece. Since the socket main body is provided at a position close to, when the socket body is inserted into the socket mounting hole of the circuit board, the free end of the first power supply contact portion is rearward in the insertion direction, and the free end of the circuit board is There is no risk of getting caught on the inner surface of the socket mounting hole.

According to the fifth aspect of the present invention, when the socket body is inserted into the socket mounting hole of the circuit board, the locking projection elastically deforms and passes through the socket mounting hole, and the locking projection elastically returns. The circuit board between the upper surface of the flange and the upper surface of the flange. Therefore, it can be attached to the circuit board simply by inserting the socket in a straight line.
There is no need to rotate the socket, operability is good, and there is no need to secure a large space on the circuit board side.

According to the sixth aspect of the invention, since the locking projection is formed on the socket body, the circuit board can be held between the locking projection and the flange portion, and the fixing strength is increased. be able to.

According to the invention of claim 7, since the locking projection is formed on the tubular-side connecting piece of the conductive terminal, no special molding is required for the socket body, and the molding of the socket body is facilitated. .

According to the invention of claim 8, since the sealing portion of the baseless bulb is held by the holding piece formed on the conductive terminal, the lead wire is also connected to the holding piece.
Only the baseless bulb can be inserted into and removed from the socket body.

According to the ninth aspect of the present invention, it is possible to mechanically and electrically connect and attach the socket body, on which the baseless bulb is mounted, to the circuit board side without rotating. According to the invention of claim 10, since the lead wire of the baseless bulb is welded to the conductive terminal by soldering or the like, the baseless bulb and the conductive terminal are integrated, and there is no concern that the baseless bulb will come off.

According to the eleventh aspect of the present invention, since the sealing portion of the baseless bulb is held by the holding piece formed on the conductive terminal and the lead wire is also connected to the holding piece, the baseless bulb can be obtained. If it fails to light, only the baseless bulb can be replaced. According to the twelfth aspect of the invention, it is possible to provide a lighting device that makes the most of the advantages of the baseless light bulb device according to the eighth to tenth aspects.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the first embodiment shown in FIGS. In the figure, 1 is a baseless bulb, 10 is a socket for a baseless bulb, and these baseless bulb 1 and socket 10 are combined to form a baseless bulb device.

The baseless bulb 1 has a filament 3 housed in a bulb 2 made of soft glass. A crush seal portion 4 is formed at one end of the valve 2, and a pair of lead wires 5 and 5 connected to the filament 3 airtightly penetrate the crush seal portion 4 and the crush seal portion 4 is formed. It is led out from the end face.

The socket 10 for a baseless bulb includes a socket body 11 made of an insulating material made of synthetic resin such as nylon, and a pair of conductive members made of a conductive plate such as copper-nickel alloy. It is composed of terminals 30 and 30. The socket body 11 includes a tubular portion 12 having a substantially quadrangular shape and a flange portion 13 formed on the outer periphery of the tubular portion 12, and at one end of the tubular portion 12, a lamp insertion hole 14 opened upward is formed. Also, the socket body 11
At the other end, a grip portion 15 that projects downward from the flange portion 13 is formed. The grip portion 15 is closed at its end surface and has, for example, a rectangular shape.

Locking projections 16 and 16 are formed on the side wall of the cylindrical portion 12 at positions opposite to each other by 180 °. These locking projections 16 and 16 have hooking claws 17 and 17 at their tips, and these hooking claws 17 and 17 and the flange portion 13 are provided.
It is designed to hold the circuit board between. The locking projections 16 and 16 of this example are provided upright from the grip portion 15 so that the upper end portions thereof can be elastically deformed in a direction orthogonal to the center line of the socket body 11.

Further, openings 18 and 18 for mounting the conductive terminals are formed on the side wall of the cylindrical portion 12 in a direction intersecting with the pair of locking projections 16 and 16. The openings 18, 18 for attaching the terminals are adapted to electrically connect the inside and the outside of the tubular portion 12.
On the side surface of 8, the insertion groove 1 along the center line of the socket body 11
9 and 19 are formed.

Then, the flange 13 is opposed to the openings 18 and 18, and the fitting recess 2 is formed along the radial direction.
0 and 20 are formed. These fitting recesses 20, 20
Has a groove shape that opens across the upper and lower surfaces of the flange portion 13, and has step portions 21 and 21 formed on the side surfaces.

Openings 18, 18 for attaching the conductive terminals
The conductive terminals 30, 30 are attached to the. The conductive terminal 30 has a flange-side connecting piece 31 installed on the flange portion 13, and a tube-side connecting piece 32 that is bent from the flange-side connecting piece 31 and stands upright and is attached to the opening 18. .

The flange side connecting piece 31 is the above flange portion 1.
3 is fitted into the fitting recess 20 and both side edges are stepped portions 21 and 2.
It is supposed to be supported by 1. The lead wire 5 of the baseless bulb 1 is attached to the lower surface of the flange-side connecting piece 31, and is joined by means such as soldering or spot welding. That is, when the baseless electric bulb 1 is inserted into the lamp insertion hole 14 of the socket body 11, the crushable sealing portion 4 is inserted into the grip portion 15 of the socket body 11, and at this time, is pulled out from the crushable sealing portion 4. Connect the lead wires 5 and 5 to the fitting recesses 20 and 2 of the flange 13.
Lead to zero. Such a lead wire 5 is joined to the lower surface of the flange-side connecting piece 31 by means such as soldering or spot welding as described above.

The cylindrical-side connecting piece 32 extending from the flange-side connecting piece 31 has its both side edges fitted in vertically extending insertion grooves 19, 19 formed in the conductive terminal mounting opening 18 of the socket body 11. As a result, the tube-side connecting piece 32 is locked to the socket body 11. In this case, locking tongue pieces 32a, 32
a is formed so that the locking tongue pieces 32a, 32a are hooked on the socket body 11 and the tube-side connecting piece 32 does not come out upward. Therefore, the tube-side connecting piece 32 comes to be locked to the socket body 11, and thus the conductive terminal 30 is substantially fixed to the socket body 11.

A first power source introduction contact portion 33 is formed on the cylinder side connection piece 32. This power supply contact portion 33
Is connected to the cylinder-side connecting piece 32 and is elastically deformable. In the case of this embodiment, the tube-side connecting piece 32 is cut and raised with its substantially central portion facing outward, and the cut-and-raised tongue forms the first power supply contact portion 33. The first power supply contact piece 33 is integrally connected to the cylinder-side connecting piece 32 at its upper end, and its lower end is a free end. That is, the free end 33a of the first power supply introduction contact portion 33 is provided at a position closer to the flange portion 13 than the continuous portion of the first power supply introduction contact portion 33 and the cylinder-side connecting piece 32. The free end 33a is elastically deformable in a direction perpendicular to the center line of the socket body 11, that is, in the radial direction of the tubular portion 12 (inward and outward). In the free state, the first power supply contact portion 33 projects outward from the outline of the tubular portion 12.
The first power supply contact portion 33 may be integrally formed with a contact protrusion (not shown) that further protrudes outward.

On the other hand, the flange-side connecting piece 31 has a second
The power supply contact portion 34 is formed. The second power supply introduction contact portion 34 is connected to the flange side connection piece 31 and is elastically deformable. In the case of the present embodiment, the flange-side connecting piece 31 is cut and raised with its substantially central portion facing upward, and the cut-and-raised tongue forms the second power supply contact portion 34. The second power supply contact portion 34 is integrally connected to the flange-side connecting piece 31 at the outer end, and the inner end is a free end. That is, the free end 34a of the second power supply contact portion 34 is
Is provided at a position closer to the tubular portion 12 than the connecting portion of the power supply introduction contact portion 34 and the flange-side connecting piece 31. The free end 34a is in a direction along the center line of the socket body 11, that is, It is elastically deformable in the vertical direction. In the free state, the tip of the second power supply introduction contact portion 34 projects above the upper surface of the flange portion 13. The second power supply introduction contact portion 34 may also be integrally formed with a contact protrusion (not shown) that further protrudes upward.

A printed circuit board 40 is shown in FIG. 1, and this printed circuit board 40 has a socket mounting hole 41 into which the cylindrical portion 12 of the socket body 11 is inserted. Notch grooves 42, 42 into which the locking projections 16, 16 of the socket 10 are inserted are provided on the inner surfaces of the socket mounting holes 41 at positions facing each other. further,
Guide grooves 43, 43 are formed on the inner surface in a direction intersecting the cutout grooves 42, 42 with which the first power supply contact portion 34 formed on the cylinder side connecting piece 32 slides. First feeding terminals 44, 44 are formed on the inner surface of 43. These first power supply terminals 44, 44 are connected to a printed wiring (not shown) formed on the lower surface of the printed circuit board 40, and are connected to a power source through this printed wiring.

In the case of a conventional existing printed circuit board or the like, as shown in FIGS. 3 and 5, the printed circuit board 4 is used.
Second power supply terminals 45, 45 are formed on the lower surface of 0 near the periphery of the socket mounting hole 41.

The operation of the capless electric bulb device thus formed will be described. In order to assemble the baseless bulb device, first, the baseless bulb 1 is inserted into the lamp insertion hole 14 of the socket body 11 from the crushing sealing portion 4 side, and the crushing sealing portion 4 is inserted into the grip portion 15. At this time, lead wires 5, 5
Are led out to the fitting recesses 20, 20 formed in the flange portion 13.

Next, the conductive terminals 30, 30 are attached to the socket body 11. The conductive terminals 30, 30 are fitted from above into the insertion grooves 19, 19 formed in the terminal mounting opening 18 of the socket body 11, with both side edges of the tube-side connecting piece 32 being fitted along the insertion grooves 19, 19. Push in. In this pushing down, the flange side connection piece 31 formed by bending the lower end of the cylinder side connection piece 32 is fitted into the fitting recess 20 of the flange portion 13, and the side edges thereof are stepped portions 21, 2.
It is supported by 1 and pushed in to the position. As a result, the locking tongues 32a, 32a formed on both side edges of the tube-side connecting piece 32 are formed.
Is caught by the socket body 11, and thus the rising piece 32 is prevented from coming out upward. From this,
The conductive terminals 30, 30 are fixed to the socket body 11.

In this state, the lead wire 5 guided from the baseless bulb 1 is attached to the lower surface of the flange-side connecting piece 31 which is fitted into the fitting recess 20 of the flange portion 13, and these are used for soldering or spot welding. To join.

As a result, the conductive terminals 30, 30 are fixed to the socket body 11, and the baseless bulb 1 and the conductive terminals 30, 30 are electrically connected, so that the baseless bulb 1 can be taken out without coming out of the socket body 11. Will be worn.

That is, in this way, the baseless bulb 1 can be integrally assembled with the socket 10, and thus the baseless bulb device is completed. The baseless bulb device is attached to the printed circuit board 40. At the time of this mounting, the locking projections 16, 16 formed on the socket body 11 are made to face the notch grooves 42, 42 of the circuit board 40, and this baseless bulb device is inserted into the socket mounting hole 41. Then, the locking protrusions 16 and 16 are attached to the circuit board 4.
When the hooking claws 17, 17 slide on the inner surfaces of the notch grooves 42, 42 and pass through the mounting hole 41, the inner surfaces of the notch grooves 42, 42 are elastically deformed. Hooking claw 17,
When the tip of 17 penetrates the upper surface of the circuit board 40, the locking projections 16 and 16 elastically return, and the hooking claws 17 and 17 are locked to the upper surface of the circuit board 40.

Therefore, the printed circuit board 40 is sandwiched between the hooking claws 17 and the flange portion 13, and the baseless bulb device is mechanically fixed to the printed circuit board 40. In this case, since the locking projections 16 and 16 are fitted into the cutout grooves 42 and 42, the rotation of the baseless bulb device is prevented.

On the other hand, when the baseless electric bulb device is inserted into the socket mounting hole 41 of the printed circuit board 40 as described above, the first power supply contact portion 33 protruding beyond the cylindrical portion 12 of the socket body 11 is introduced. , 33 is a guide groove 43,
43, and slides into contact with the first power supply terminals 44, 44 formed on the inner surfaces of the guide grooves 43, 43. As the insertion progresses, the first power supply introduction contact portions 33, 33 are connected to the first power supply terminal 4
4, 44, so that these power supply contact portions 33,
33 is elastically deformed.

Then, as described above, the hooking claws 17, 1
When the printed circuit board 40 is sandwiched between the flange 7 and the flange portion 13, the first power supply contact portions 33, 33 come into contact with the first power supply terminals 44, 44 at a predetermined contact pressure.
As a result, the circuit board 40 and the baseless bulb device are electrically connected.

In this state, the power source is the printed circuit board 4
A printed wiring (not shown) formed on the lower surface of 0, the first power supply terminals 44, 44, the first power supply introduction contact portion 33,
33, cylinder side connecting pieces 32, 32, flange side connecting piece 31,
31 and the lead wires 5 and 5 of the baseless bulb 1 are connected to the filament 3 of the baseless bulb 1.

In such a structure, when the socket body 11 is inserted into the socket mounting hole 41 of the circuit board 40, the first power supply contact portion 3 of the conductive terminals 30, 30 is inserted.
3, 33 contact the first power supply terminals 44, 44 formed on the inner surface of the socket mounting hole 41 of the circuit board 40. Therefore, electrical connection is made on the inner surface of the socket mounting hole 41 of the circuit board 40, and the first power supply introduction contact portions 33, 33 and the first power supply terminals 44, 44 come into contact with each other with a large contact pressure. become.

In this case, the first power supply terminals 44,
Since 44 is formed on the inner surface of the socket mounting hole 41,
Since it is not necessary to dispose the power supply terminals surrounding the socket mounting hole 41, that is, the second power supply terminals 45, 45 on the lower surface of the circuit board 40, a large space is not required.

When the above-mentioned baseless light bulb device is attached to the printed circuit board 40, the locking projections 16 and 16 are elastically deformed only by facing the socketless light bulb device to the socket mounting hole 41 and inserting it straight. Thus, it can be attached to the printed circuit board 40. At the same time, the first power supply contact portion 3 of the conductive terminals 30, 30
3, 33 enter the guide grooves 43, 43 and are electrically connected to the first power supply terminals 44, 44. Therefore, unlike the prior art, there is no need for an operation such as turning after inserting the baseless bulb device, and the mounting work becomes easy.

Further, since the turning operation is not required, the space for allowing the turning is not required, and when a plurality of the baseless bulb devices are arranged close to each other, the adjacent baseless bulb devices are Problems such as mutual interference are eliminated, and the baseless bulb devices can be arranged close to each other, and the installation space can be reduced.

In the above embodiment, the conductive terminal 3
0 and 30 are fixed to the socket main body 11 by fitting the tube-side connecting piece 32 into the insertion grooves 19 and 19 formed in the opening 18 of the socket main body 11.
Easy to attach 0, 30. Also, the cylinder side connecting piece 3
The flange-side connecting piece 31 formed at the lower end of the lamp 2 and the lamp-side lead wire 5 are joined in the fitting recess 20 of which the upper and lower surfaces provided in the flange portion 13 are open. Joining such as welding can be performed from the outside, which facilitates the joining work.

Further, since the free end 33a of the first power supply introduction contact portion 33 is provided at a position closer to the flange portion 13 than the continuous portion of the power supply introduction contact portion 33 and the cylinder-side connecting piece 32, When the socket 10 is inserted into the socket mounting hole 41 of the circuit board 40, the free end 33a of the power supply contact portion 33 is rearward in the insertion direction, and the free end 33
There is no concern that a will be caught on the inner surface of the socket mounting hole 41.

Further, the free end 33a of the first power source introduction contact portion 33 has the socket main body 11 as shown by the arrow in FIG.
Since it is movable in the direction perpendicular to the center line of the first power supply terminal, the first power supply contact portions 33, 33 can contact the first power supply terminals 44, 44 with a large contact pressure to maintain a good energized state. it can.

In the case of a conventional existing printed circuit board or the like, as shown in FIGS. 3 and 5, the second power supply terminal is provided on the lower surface of the circuit board 40 close to the periphery of the socket mounting hole 41. 45, 45 are formed. The above-mentioned baseless light bulb device can be attached to such a circuit board 40.

That is, the second power supply terminals 45, 4 are provided on the lower surface.
In the case of the circuit board 40 in which 5 is formed on the lower surface, when the above-mentioned baseless light bulb device is inserted into the socket mounting hole 41 of the printed circuit board 40, the hooking claws 17, 17 and the flange portion are inserted in the same manner as in the above case. The printed circuit board 40 is sandwiched between the two. In this case, the second power supply introduction contact portions 34, 34 projecting from the flange portion 13 of the socket body 11 to the upper surface are in predetermined contact with the second power supply terminals 45, 45 formed on the lower surface of the circuit board 40. Contact with pressure. As a result, the circuit board 40 and the baseless bulb device are electrically connected.

In this state, the power source is the printed circuit board 4
The second power supply terminals 45, 45 formed on the lower surface of
Second power supply contact portions 34, 34, flange side connection piece 3
1, 31 and lead wires 5, 5 of the baseless bulb 1 are connected to the filament 3.

Even in such a case, since the locking projections 16 and 16 are elastically deformed simply by facing the socket-free bulb device to the socket mounting hole 41 and inserting it straight, the locking projections 16 and 16 can be mounted on the printed circuit board 40, and at the same time. , The second power supply contact portions 34, 34 of the conductive terminals 30, 30 are electrically connected to the second power supply terminals 45, 45 formed on the lower surface of the substrate. There is no need to rotate the bulb device after inserting it, and the installation work is easy.

From the above, in the case of the baseless electric bulb device of the above embodiment, even the circuit board in which the power supply terminals 44, 44 are formed on the inner surface of the socket mounting hole 41 formed in the circuit board 40. , Or another circuit board in which the power supply terminals 45, 45 are formed on the lower surface of the circuit board, can be attached to any of them. Therefore, it can be attached to an existing circuit board, and the usability is expanded.

FIG. 7 shows a second embodiment of the present invention. This embodiment differs from the first embodiment in that the support structure for the baseless bulb 1 is different. That is, in the case of the first embodiment, the lead wire 5 of the baseless bulb 1 is welded to the flange-side connecting piece 31 of the conductive terminal 30 by means of soldering or the like to integrate the two, but as shown in FIG. In the case of the second embodiment, the structure of the baseless bulb 1 is detachably attached to the conductive terminals 30, 30.

In this embodiment, each conductive terminal 30, 3 is
In FIG. 0, holding pieces 38, 38 extending from the side end of the cylinder side connecting piece 32 and facing each other are formed. These holding pieces 3
Reference numerals 8 and 38 serve to elastically clamp the sealing portion 4 of the baseless bulb 1. In this case, the sealing portion 4 of the baseless bulb 1
A power receiving terminal 5a formed by bending and attaching a lead wire 5 is formed on the. The power receiving terminal 5a of this example is formed by bending the lead wire 5 into a U shape. Although not shown, the power receiving terminals 5a including the pair of lead wires 5 are arranged on the respective surfaces of the sealing portion 4 so as to be diagonal to each other. In this embodiment, the same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the case of such a configuration, the conductive terminals 30, 3
0 is the opening 1 for mounting the conductive terminal of the socket body 11 on both side edges of the tube-side connecting piece 32, as in the first embodiment.
Locking tongue pieces 32a, 32a which are fitted in the insertion grooves 19, 19 formed on the side wall 8 and are formed on both side edges of the tube-side connecting piece 32.
Is caught in the socket body 11 and is prevented from coming out upward, so that the conductive terminals 30, 30 are fixed to the socket body 11.

In this state, when the baseless bulb 1 is inserted into the lamp insertion hole 14 of the socket body 11, the sealing portion 4 enters between the holding pieces 38, 38 formed on the conductive terminals 30, 30 and these The holding pieces 38, 38 are pushed open. These holding pieces 38, 38 elastically return to hold the sealing portion 4 by this elastic force. At the same time, the power receiving terminal 5a attached to the sealing portion 4
Contacts any one of the holding pieces 38. Therefore, the baseless bulb 1 is mechanically locked to the conductive terminals 30 and 30 and simultaneously electrically connected.

In the case of such a configuration, if the baseless bulb 1 becomes incapable of lighting due to a disconnection or the like, only the baseless bulb 1 can be detached, and therefore the baseless bulb 1
Only can be exchanged.

8 and 9 show a third embodiment of the present invention. This embodiment is different from the first embodiment in that, as can be seen from FIG. 9, the first power supply contact portion 3 of the conductive terminal 30 is provided.
3 is bent from the upper end of the cylinder side connecting piece 32 and extends downward, and the second power supply contact portion 34 is also bent from the outer end of the flange side connecting piece 31 and extends inward. In the third embodiment, the same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Even in this case, the same effect as that of the first embodiment can be obtained. 10 and 11 show a fourth embodiment of the present invention. The difference between this embodiment and the first embodiment is that the structure of the conductive terminals is different, as can be seen from FIG. That is, in the conductive terminal 130 of the present example, the cylinder-side connecting piece 132, which is bent and extended from the flange-side connecting piece 131 similar to that of the first embodiment, is integrally formed. A plurality of sliding pieces 135 are formed vertically above and below the left and right side edges of the cylindrical connecting piece 132, and these sliding pieces 135 are formed in the opening 18 for mounting the conductive terminal of the socket body 11. It is adapted to be fitted in the insertion grooves 19, 19. A first power supply introduction contact portion 133 is formed by bending the middle of the cylinder side connection piece 132,
A contact protrusion 136 is formed on the first power supply contact portion 133. The second power supply introduction contact portion 134 is also formed by bending from the outer end of the flange side connection piece 131, and the second power supply introduction contact portion 134 extends inward.

In such a structure, when the socket is attached to the circuit board and the contact protrusion 136 of the first power supply introducing contact portion 133 is pushed to the first power supply terminal 44 on the circuit board side, the first power supply The introduction contact portion 133 is pushed, and the sliding pieces 135 of the cylinder side connecting piece 132 slide up and down along the insertion grooves 19 and 19 as shown by arrow A in FIG. The introduction contact portion 133 elastically deforms in the direction perpendicular to the central axis of the socket body 11 as shown by an arrow B. This elastic restoring force causes the contact protrusion 136 to move the first power supply terminal 44.
Will be contacted with a predetermined contact pressure.

In this case, the free end 133a of the first power supply contact portion 133 becomes the upper end of the cylinder side connecting piece 132 and can move in the direction along the center line of the socket body 11 as shown by arrow A. When the first power supply introduction contact portion 133 and the first power supply terminal 44 of the circuit board come into contact with each other, the deformation stress of the first power supply introduction contact portion 133 can be released in the direction of the center line, and an appropriate pressure contact force can be obtained. There is an advantage.

12 and 13 show a fifth embodiment of the present invention. In this embodiment, the engaging protrusion 116 for holding the circuit board 40 between the flange portion 13 and the conductive terminal 230 is provided.
It is formed in. That is, the conductive terminal 230 of this embodiment is similar to the flange side connecting piece 23 of the first embodiment.
1 is formed by bending the tube-side connecting pieces 232 ..., and the tube-side connecting pieces 232 ...
7 is provided with a pair of locking projections 116, 116, and a first power supply contact portion 233 is formed between the locking projections 116, 116. In this conductive terminal 230, the cylinder-side connecting pieces 232 ...
By being fitted in 19, it is attached to the socket, and in this case, the locking projections 116, 116 face the outside of the cylindrical portion 12. The flange-side connecting piece 231 is formed with a second power-introducing contact portion 234, which is similar to that in the first embodiment, but extends outward, and this second power-introducing contact portion 2 is formed.
34 projects from the upper surface of the flange portion 13.

Therefore, also in this case, if the socket 10 with the baseless bulb 1 is inserted into the socket mounting hole 41 of the circuit board 40, the circuit board 40 is held between the locking projections 116 and 116 and the flange portion 13. Moreover, the first power supply introduction contact portion 233 is electrically connected to the first power supply terminal 44. Further, when the second power supply terminal is formed on the lower surface of the substrate, the second power supply introduction contact portion 234 is connected to the second power supply terminal 45.

Also in this case, the socket 10 with the baseless bulb 1 mounted thereon may be inserted straight into the socket mounting hole 41 of the circuit board 40, and the turning operation is unnecessary, so that the attaching and detaching work is facilitated.

In the case of such a structure, since the locking projections 116, 116 are formed on the conductive terminal 230, the structure of the socket body 11 is simplified, and the socket body 11 that is normally molded can be easily molded. Become. In addition, the conductive terminal 2
Since the numeral 30 is cut out from the conductive metal plate and press-molded, the conductive terminal 230 is engaged with the locking projection 11
Even if 6,116 are formed, the number of steps does not increase significantly, and it becomes possible to manufacture at low cost. In the case of this embodiment, the locking projection 116 and the first power supply introduction contact portion 233 may be used together.

[0080]

As described above, according to the invention of claim 1, when the power supply terminal of the circuit board is formed on the inner surface of the socket mounting hole, the socket body is inserted into the socket mounting hole of the circuit board. The first power supply introduction contact portion formed on the cylindrical connection piece of the conductive terminal comes into contact with the first power supply terminal formed on the inner surface of the socket mounting hole. When the power supply terminal of the circuit board is formed on the lower surface near the socket mounting hole, when the socket body is inserted into the socket mounting hole of the circuit board, the second power source formed on the flange-side connecting piece of the conductive terminal is formed. The introduction contact portion comes into contact with the second power supply terminal formed on the lower surface of the circuit board.

Therefore, regardless of whether the power supply terminal of the circuit board is formed on the inner surface of the socket mounting hole or on the lower surface of the circuit board, the socket body is simply connected to the socket of the circuit board. By linearly inserting into the mounting hole, either one of the power supply introduction contact parts can be brought into contact with the power supply terminal facing the power supply introduction contact part.

Therefore, it is possible to linearly insert and remove the power supply terminal into and from the circuit board without rotating the socket, and the power supply terminal is formed on the inner surface of the socket mounting hole. Any existing circuit board formed on the lower surface of the board near the hole can be used.

According to the second aspect of the present invention, the side edge portion of the tubular-side connecting piece is inserted into the insertion groove formed in the tubular portion of the socket body along the axial direction of the tubular portion, and is formed on the flange portion. Since the flange-side connection piece is fitted in the fitting recess, the conductive terminal can be reliably fixed to the socket body.

According to the third aspect of the present invention, at least one of the first power supply introduction contact portion formed on the cylinder side connection piece and the second power supply introduction contact portion formed on the flange side connection piece is elastically deformed. Since it has possible free ends, the free ends of these power supply introduction contact parts come into elastic contact with the power supply terminals on the circuit board side, and a high contact pressure can be obtained.

According to the fourth aspect of the present invention, the free end of the first power supply introduction contact portion formed on the cylinder-side connecting piece is more flanged than the connecting portion between the power supply introduction contact portion and the cylinder-side connecting piece. Since the socket main body is provided at a position close to, when the socket body is inserted into the socket mounting hole of the circuit board, the free end of the first power supply contact portion is rearward in the insertion direction, and the free end of the circuit board is There is no risk of getting caught on the inner surface of the socket mounting hole.

According to the invention of claim 5, when the socket body is inserted into the socket mounting hole of the circuit board, the locking projection is elastically deformed and passes through the socket mounting hole, and the locking projection is elastically restored. The circuit board between the upper surface of the flange and the upper surface of the flange. Therefore, it can be attached to the circuit board simply by inserting the socket in a straight line.
There is no need to rotate the socket, operability is good, and there is no need to secure a large space on the circuit board side.

According to the invention of claim 6, since the locking projection is formed on the socket body, the circuit board can be held between the locking projection and the flange portion, and the fixing strength is increased. be able to.

According to the invention of claim 7, since the locking projection is formed on the cylindrical side connecting piece of the conductive terminal, no special molding is required for the socket body, and the molding of the socket body is facilitated. .

According to the invention of claim 8, since the sealing portion of the baseless bulb is held by the holding piece formed on the conductive terminal, the lead wire is also connected to the holding piece.
Only the baseless bulb can be inserted into and removed from the socket body.

According to the ninth aspect of the present invention, the socket main body on which the baseless bulb is mounted can be mechanically and electrically connected and attached to the circuit board side without rotating. According to the invention of claim 10, since the lead wire of the baseless bulb is welded to the conductive terminal by soldering or the like, the baseless bulb and the conductive terminal are integrated, and there is no concern that the baseless bulb will come off.

According to the eleventh aspect of the invention, since the sealing portion of the baseless bulb is held by the holding piece formed on the conductive terminal, and the lead wire is also connected to the holding piece, the baseless bulb can be obtained. If it fails to light, only the baseless bulb can be replaced. According to the twelfth aspect of the invention, it is possible to provide a lighting device that makes the most of the advantages of the baseless light bulb device according to the eighth to tenth aspects.

[Brief description of drawings]

FIG. 1 is a perspective view of a baseless bulb device and a circuit board showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the baseless electric bulb device of the embodiment.

FIG. 3 is a side view of the baseless bulb device according to the embodiment.

FIG. 4 is a front view of the baseless bulb device according to the embodiment.

FIG. 5 is a unidirectional sectional view of the baseless bulb device of the embodiment.

FIG. 6 is a cross-sectional view in the other direction of the baseless bulb device of the same embodiment.

FIG. 7 is an exploded perspective view of a baseless electric bulb device according to a second embodiment of the present invention.

FIG. 8 is a perspective view of a baseless bulb device and a circuit board showing a third embodiment of the present invention.

FIG. 9 is an exploded perspective view of the baseless electric bulb device according to the embodiment.

FIG. 10 is a perspective view of a baseless bulb device according to a fourth embodiment of the present invention.

FIG. 11 is a perspective view of the conductive terminal according to the embodiment.

FIG. 12 is a perspective view of a baseless bulb device according to a fifth embodiment of the present invention.

FIG. 13 is a perspective view of a conductive terminal of the same embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Baseless light bulb 2 ... Bulb 3 ... Filament 4 ... Sealing part 5 ... Lead wire 10 ... Socket 11 ... Socket body 12 ... Cylindrical part 13 ... Flange part 14 ... Lamp insertion hole 15 ... Grip part 16 ... Locking protrusion 17 ... hooking claw 18 ... opening 19 ... insertion groove 20 ... fitting recess 21 ... step 30 ... conductive terminal 31 ... flange side connecting piece 32 ... cylinder side connecting piece 32a ... locking tongue 33 ... first power source introduction Contact portion 33a ... Free end portion 34 ... Second power supply contact portion 38 ... Holding piece 5a ... Power receiving terminal 40 ... Printed circuit board 41 ... Mounting hole 42 ... Notch groove 43 ... Guide groove 44 ... First power supply terminal 45 ... 2nd electric power feeding terminal 130,230 ... Conductive terminal 131,231 ... Flange side connection piece 132,232 ... Cylinder side connection piece 133,233 ... 1st power supply introduction contact part 134,234 ... 2nd power supply introduction contact part

Claims (12)

[Claims] 1. A socket body having a tubular portion, a lamp insertion hole into which a baseless electric bulb is inserted is opened at one end of the tubular portion, and a flange portion is formed on a side surface of the tubular portion;
A first side having a tube-side connection piece attached to the tube portion and a flange-side connection piece arranged on the flange portion, the tube-side connection piece being in contact with a power supply terminal facing the tube-side connection piece.
And a conductive terminal having a second power supply contact portion formed on the flange-side connection piece and capable of contacting a power supply terminal facing the flange-side connection piece. Socket for light bulbs with no base. 2. The cylindrical portion of the socket body is formed with an insertion groove into which the side edge portion of the cylindrical connecting piece is inserted along the axial direction of the cylindrical portion, and the flange portion has the flange side. The socket for a baseless electric bulb according to claim 1, wherein a fitting recess into which the connection piece is fitted is formed. 3. At least one of the first power supply introduction contact portion formed on the cylinder side connection piece and the second power supply introduction contact portion formed on the flange side connection piece has a free end that is elastically deformable. It has, The socket for baseless bulbs of Claim 1 or Claim 2 characterized by the above-mentioned. 4. When the first power supply introducing contact portion formed on the cylinder side connecting piece has an elastically deformable free end, the free end is the first power introducing contact part and the cylinder side connecting piece. The socket for a baseless bulb according to claim 3, wherein the socket is provided at a position closer to the flange portion than the continuous portion. 5. A locking projection for holding the circuit board between the upper surface of the flange portion when the cylindrical portion of the socket body is inserted into a socket mounting hole formed in the circuit board. Claim 1 thru | or 4 characterized by the above-mentioned.
A socket for a baseless bulb according to any one of 1. 6. The socket for a baseless bulb according to claim 5, wherein the locking protrusion is formed on the socket body. 7. The socket for a baseless electric bulb according to claim 5, wherein the locking projection is formed on a cylindrical-side connecting piece of the conductive terminal. 8. The holding terminal for holding the sealing portion of the baseless electric bulb and a holding piece for electrically connecting a lead wire attached to the sealing portion are formed on the conductive terminal. The socket for a baseless electric bulb according to any one of claims 1 to 7, which is characterized in that. 9. A socketless electric bulb according to any one of claims 1 to 8, and a socketless electric bulb inserted into a lamp insertion hole of the socket; Gold light bulb device. 10. The baseless bulb device according to claim 9, wherein a lead wire of the baseless bulb is welded to the conductive terminal. 11. A socket for a baseless electric bulb according to claim 8, which is inserted into a lamp insertion hole of the socket, and a sealing portion is held by a holding piece of the conductive terminal, and the sealing portion is attached to the sealing portion. A baseless electric bulb device comprising: a baseless electric bulb having an attached lead wire electrically connected to the holding piece. 12. A baseless light bulb device according to any one of claims 8 to 10; a socket mounting hole into which a cylindrical portion of a socket body of the baseless lightbulb device is inserted; A first power supply terminal that is formed on the inner surface of the hole and is in contact with the first power supply contact portion of the socket for the baseless bulb and a second part of the socket for the baseless bulb that is formed on the lower surface near the socket mounting hole. An illumination device, comprising: a circuit board having at least one power supply terminal of the second power supply terminals with which the power supply introduction contact portion is in contact.