JPH0616375B2 - Fluorescent lamp - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fluorescent lamp having a base at one end of a lamp main body having two U-shaped portions. [Prior Art] One end of a bent glass tube A variety of so-called single-base type fluorescent lamps having a base fixed thereto have been proposed since the entire lamp can be made compact. In particular, U-shaped fluorescent lamps are widely used because they are relatively easy to manufacture and easy to use. Japanese Unexamined Patent Publication (Kokai) No. 54-164373 discloses a typical U-shaped fluorescent lamp and a lamp socket suitable for this lamp. That is, FIG. 6 is a perspective view of a U-shaped fluorescent lamp disclosed in Japanese Patent Laid-Open No. 54-164373, in which a glass tube bent in a U shape is used as a lamp main body (1). Both ends of 1) are fixed to one common base (20). This base (20) has an oval shape, and the base pin facing the light emitting part (1) is on the bottom side.
(24) is provided in a protruding manner, and engaging projections (23) are provided at both ends on the longitudinal side. Then, install the lamp socket (3
As shown in FIG. 7 which is an exploded perspective view thereof, (0) is provided with a mouthpiece accommodating recess (31) corresponding to the outer shape of the mouthpiece (20), and the mouthpiece accommodating recess (31) is provided at the bottom thereof. A pin connecting portion (32) is provided, and a locking portion for locking the engagement protrusions (23) of the ferrule (20) at both longitudinal ends of the ferrule containing recess (31).
(32) is provided. Then, by mounting the fluorescent lamp in the lamp socket (30), they are electrically and mechanically coupled to each other, and they can sufficiently cope with each other in any lighting direction without being separated from each other. Is. However, although the U-shaped fluorescent lamp as described above is excellent in terms of usability, it is still insufficient in terms of compactness.

FIG. 8 and FIG. 9 show a fluorescent lamp disclosed in USP 3,501,662 as a fluorescent lamp which can be made more compact. That is, a straight glass tube (11), (12), (13), (14), which has four legs closed at the top, has two U-shaped parts overlapped with each other and the inside has a series. To form a lamp main body (1), and
A base (20) in which a pair of electrodes (2) are sealed at the ends of two glass tubes (11) and (14) with (1) at both ends, and four base pins (24) are projected. ) Is fixed to the ends of the glass tubes (11), (12), (13) and (14) which are the bottoms.

[Problems to be solved by the invention]

However, since the USP 3,501,662 publication does not describe a lamp socket, it can be inferred from the specification and the drawings that a lamp socket capable of electrically and mechanically coupling the fluorescent lamp has a geometrical shape. Considerable size is expected, and because the lamp has the above structure,
When a force is applied to the two U-shaped portions to approach each other when the lamp is attached or detached, it is conjectured that the joint portion on the end side of the leg portion is easily broken.

Further, when the lamp has a shape in which two U-shaped glass tubes are overlapped with each other in this manner, the weight increases, and therefore, in order to support the lamp in a so-called cantilever system, it is necessary to increase the supporting force. Therefore, when used in a place where the glass tube becomes long or where external force such as vibration is likely to be applied, there is also a problem that special measures such as provision of a lamp support member must be taken in order to prevent the lamp from being detached from the socket. .

This invention has a more compact lamp main body as disclosed in the above-mentioned USP 3,501,662, but can also achieve a compact base, and can prevent destruction of the lamp main body, and has been widely put into practical use. An object of the present invention is to provide a fluorescent lamp that can be mounted in the U-shaped fluorescent lamp socket.

[Means for solving problems]

According to the present invention, in order to achieve the above object, two U-shaped glass tubes each having an electrode (2) sealed at one end thereof are superposed on each other so that four legs are located at four corners of a square. And a lamp main body (1) connected so as to form a series of discharge paths, and a square shape corresponding to the outer shape of the lamp main body (1), and each leg of the lamp main body (1) is formed at four corners. Department (11) ~
(14) End plate with its ends positioned and its ends tightly fixed
(3) and a base (20) fixed to the end plate (3), the base (20) has a wall portion having a shape corresponding to the shape of the end plate (3) A flange portion (21) fixed to the opposite side of the plate (3) to which the lamp main body is fixed, and the end plate (3) of the flange portion (21).
Once fixed, it protrudes in an oval shape along the lengthwise direction on the diagonal line on the opposite side, and four cap pins (2
4) so that one of the lines connecting the adjacent pins (24) to each other extends along the longitudinal direction of the socket engaging portion (22) and the other line projects along the lateral direction, and An object of the present invention is to provide a fluorescent lamp having a structure including a socket engaging portion (22) provided with engaging protrusions (23) at both ends in the direction.

[Action]

In the present invention, the lamp main body is provided with two U-shaped portions. That is, the U-shaped fluorescent lamp is more compact than the conventional U-shaped fluorescent lamp because the U-shaped fluorescent lamp is further folded in half. Also, since the base has a shape corresponding to the outer shape of the lamp main body, there is no extra overhanging part, and when the lamp is attached or detached, the flange part can be operated, so a large force is applied to the lamp main body. Prevents corner destruction without adding.
Further, since the socket engaging portion of the base is provided along the diagonal line of the flange portion, the length of one side of the flange portion can be made smaller than the length of the socket engaging portion. Even if it has the same shape as the above, it does not protrude from the flange portion, and therefore, the base itself can be made compact, and moreover, it can be attached to the socket for the U-shaped fluorescent lamp.

Also, one of the lines connecting the base pins of adjacent base pins is along the longitudinal direction of the socket engaging part, and the other line is projected along the lateral direction, so that the lamp is most commonly used. That is, when the lamp is used in a state where the U-shaped surface of the lamp is parallel to the horizontal plane, the two base pins on one diagonal connecting the base pins are positioned in the vertical direction, The drag force against the acting vertical force will increase. Therefore, even if the length of the lamp main body becomes long, or if vertical (vertical) vibrations are applied to the lamp, the lamp support member is not used specially and the lamp is securely held. it can.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 to 5. In these figures, (1) is mainly a lamp, and two U-shaped glass tubes are polymerized so that the surfaces thereof face each other, and one leg (11),
The insides of the (12) s are connected in series through the connecting portion (15) and in an airtight manner to the outside. (2) is the leg (14) on the other side (only one is shown), the electrode sealed at the end, (3)
Is a common ceramic end plate that closes the ends of all legs (11) to (14). The glass frit (4) makes the lamp main body (1) airtight to the outside, and the lamp Subject
Fix (1) with mechanical strength. (5) is a sealed exhaust thin tube, (20) is a synthetic resin base, which is mainly the lamp (1)
The flange portion (21) having a substantially square rising portion, that is, a wall portion corresponding to the outer shape of the above, and the lower surface of the flange portion (21) opposite to the lamp main body, the base of the conventional U-shaped fluorescent lamp described above. An oval socket engaging portion (22) having the same shape as the (20) is integrally projected. The oval socket engaging portion (22) is provided along the diagonal line of the collar portion (21), and the engaging protrusions (23) are provided at both ends in the longitudinal direction, and four cap pins are provided on the lower surface. (24) is projected. In addition, the socket engaging portion (22) has a space inside and serves as a housing portion for the exhaust thin tube (5), and a lead wire (not shown) led out from the electrode (2) is attached to the base pin ( It is used as a passage to connect to 24).

The base (20) thus configured is fixed to the end plate (3) which is the bottom of the light emitting part (1) with an adhesive (not shown) to complete the fluorescent lamp.

In addition, (6) is a cover body that covers the joint between the light emitting portion (1) and the base (20), which improves the design and also has a function of reinforcing the joint.

In addition, in the present invention, the structure of the light emitting portion (1) is
The structure for connecting the legs (11) to (14) to each other is not limited to the above embodiment.

〔The invention's effect〕

As described above, the present invention has a square collar part corresponding to the outer shape of the light emitting part at the bottom of the light emitting part formed by superposing two U-shaped glass tubes and connecting them in series. ,
Further, since the base with the socket engaging portion protruding is fixed on the diagonal of this flange, the entire lamp including the base can be made compact and the socket for the U-shaped fluorescent lamp, which has been most popular in the past, can be used. It is possible to mount it, it is compatible with the U-shaped fluorescent lamp, and it is possible to prevent the destruction of the light emitting part. Furthermore, four cap pins (24) are adjacent to each other at the center of the socket engaging part. One of the lines connecting the pins (24) along the longitudinal direction of the socket engaging portion (22) and the other line along the lateral direction of the socket (24), so that the lamp supporting force can be enhanced. The practical value is enormous.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a sectional view taken along line AA in FIG. 2, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is a front view. FIG. 5 is a bottom view, FIG. 6 is a perspective view showing a conventional U-shaped fluorescent lamp, and FIG. 7 is an exploded perspective view showing a socket used in the U-shaped fluorescent lamp shown in FIG. FIG. 8 is a development view showing a conventional single-ended die fluorescent lamp having two U-shaped portions with a part thereof cut away, and FIG. 9 is a sectional view of FIG. In the figure, (1) is a light emitting part, (2) is an electrode, (11), (12), (1
3) and (14) are legs, (20) is a base, (21) is a flange, (22) is a socket engaging part, (23) is an engaging protrusion, and (24) is a base pin. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Iwasawa 5-1, 1-1 Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corporation Ofuna Works (56) Reference JP-A-56-88251 (JP, A) JP 54-161766 (JP, A) JP-A-55-133744 (JP, A) JP-A-60-39753 (JP, A)

Claims (1)

[Claims] 1. A series of discharge paths in which two U-shaped glass tubes having electrodes (2) sealed at one end are polymerized with each other so that four legs are located at four corners of a square. A lamp main body (1) connected so as to form a square shape corresponding to the outer shape of the lamp main body (1), and each leg portion (11) to ((4) of the lamp main body (1) to four corners. 14) An end plate (3) in which the end is positioned and the end of the leg portion is airtightly fixed, and a base (20) fixed to the end plate (3) are provided. A flange portion (21) fixed to the opposite side of the end plate (3) to the side to which the lamp main body is fixed and having a wall portion having a shape corresponding to the shape of the plate (3), and the flange portion (21). When the end plate (3) is fixed, it protrudes in an oval shape along a diagonal line on the opposite side surface along the longitudinal direction, and four ferrule pins (24) are provided in the center of the oval shape, each pin being adjacent to each other. (2
4) One of the lines connecting the two is projected along the longitudinal direction of the socket engaging portion (22), the other line is projected along the lateral direction, and engaging projections (23) are provided at both ends in the longitudinal direction. Socket engagement part
(22) A fluorescent lamp having a structure consisting of