JP4905990B2 - Fluorescent lamp - Google Patents

Description

  The present invention relates to a fluorescent lamp.

  In general, a base having a cylindrical connection pin is used for a base of a fluorescent lamp. This is because the circular cross section of the connection pin is suitable for connection with an introduction line inserted into the connection pin and connection with a socket receiver.

  FIG. 5 shows an example of a base of such a conventional fluorescent lamp. FIG. 5A is a schematic plan view showing an end portion of the fluorescent lamp, and FIG. 5B is a schematic front view of a base portion.

  A cylindrical connection pin 203 having a circular cross section protrudes from a base 202 provided at an end of the lamp body 210 of the fluorescent lamp 201. As shown in FIG. 6, an introduction line 204 having one end connected to an electrode (not shown) of the lamp body 210 is inserted into the connection pin 203, and the connection pin 203 is deformed by caulking deformation. It is fixed by the caulking deformation part 236 formed in the above. As a result, the lead-in wire 204 and the connection pin 203 are electrically connected. Here, it is suitable for the connection pin 203 having a circular cross section that the lead wire 204 can be reliably fixed regardless of the position in the connection pin 203.

  On the other hand, in recent years, connection pins having a non-circular cross-sectional shape have been used for the purpose of maintaining the incompatibility of the caps. FIG. 7 shows a schematic cross-sectional view of a connection pin having such a flat cross section.

  In the caulking deformation process in this case, the lead-in wire 104 is fixed to the connecting pin 103 by the caulking deforming portion 136 formed by pressing the flat surface 131 of the connecting pin 103 inward, and electrical connection is obtained. Yes. Here, the caulking deformation is performed along a broken line YY that extends in the perpendicular direction of the flat surface 131 through the point C on the flat surface 131. As shown in FIG. 7A, when the center of the introduction line 104 is substantially located on the broken line YY along the caulking direction, as in the case of the connection pin having a circular cross section, the introduction line 104 and the connection pin 103 can be securely fixed, and a sufficient electrical connection can be obtained (FIG. 7B).

  However, in the connection pin 103 having a flat cross section, as shown in FIG. 8A, the lead-in line 104 is greatly displaced from the broken line YY along the caulking direction inside the connection pin 103, for example, an end in the connection pin 103. It may happen that it is inserted into the part. In that case, even if the caulking deformation process along the broken line YY as described above is performed, the lead-in wire 104 and the connection pin 103 are not sufficiently fixed (FIG. 8B).

  As a result, in some fluorescent lamps, a connection pin that causes a conduction failure due to a failure in electrical connection with the lead-in wire, or generates heat due to an increase in contact resistance, or affects the receipt due to a temperature rise. Was a problem.

  Therefore, an object of the present invention is to provide a fluorescent lamp capable of stably fixing the connection pin of the base and the lead-in wire by caulking deformation.

  In order to achieve the above-described object, the fluorescent lamp of the present invention has a base provided at the end of the lamp body, and extends from the base, has a flat cross-sectional shape, and has a hollow space inside. A connecting pin, and one is connected to the electrode, and the other is inserted into the inner space of the connecting pin, and an introduction line fixed to the inner wall of the connecting pin by caulking deformation of a flat surface of the connecting pin, In a region where the flat surface of the connection pin is caulked and deformed, a projecting guide portion for restricting the position of the lead-in line is provided on the inner wall of the flat surface of the connection pin.

  As described above, according to the present invention, it is possible to provide a fluorescent lamp capable of stably fixing the connection pin and the lead wire of the base by caulking deformation.

  Hereinafter, embodiments of the fluorescent lamp of the present invention will be described with reference to FIGS. 1 to 4.

  FIG. 1A is a schematic side view showing the end portion of the fluorescent lamp 1 in a cutaway manner, and FIG. 1B is a schematic front view showing a base 2 portion of the fluorescent lamp 1.

  A base 2 is provided at the end of the lamp body 10, and a connection pin 3 is provided protruding from the base 2. The base 2 is attached to a socket receiver such as a lighting fixture, and power is supplied to the lamp body 10 through the connection pin 3. The connection pin 3 extending from the base 2 has a hollow space inside, has a flat cross-sectional shape, and includes two flat surfaces 31 parallel to each other.

  An introduction line 4 (not shown in FIG. 1) is inserted into the internal space of the connection pin 3, and is fixed to the inner wall of the connection pin 3 by caulking deformation. The other end of the lead-in wire 4 is connected to an electrode (not shown) of the lamp body 10, whereby the connection pin 3 and the lamp body 10 are electrically connected.

  FIG. 2 is a cross-sectional view schematically showing the connection pin 3 in a region where the caulking deformation is performed with respect to a state in which the introduction line 4 is fixed inside the connection pin 3 by caulking deformation. FIG. 2A and FIG. 2B show the state before and after the caulking deformation, respectively.

  As shown in FIG. 2A, each of the inner walls 32a and 33a of the flat surface 31 has a pair of guide portions 34a and 35a so as to be symmetrical with respect to the broken line XX which is a caulking direction line. Is formed. Here, the caulking direction line XX is a line that extends in the perpendicular direction of the two flat surfaces 31 through a point (point A in FIG. 2) that is caulked and deformed on the flat surface 31. The guide portions 34 a and 35 a are formed as linear protrusions along the extending direction of the connection pin 3 so as to allow the introduction wire 4 to be smoothly inserted into the connection pin 3. The guide portions 34 a and 35 a are sufficiently high so that the introduction wire 4 does not easily move in the connection pin 3. Therefore, when the lead-in line 4 is inserted into the connection pin 3, the position thereof is regulated near the caulking direction line XX.

  The caulking deformation is performed by pressing the flat surface 31 along the caulking direction line XX to cause plastic deformation. Here, as shown in FIG. 2 (b), the caulking deformed portion 36 a is formed on the inner wall 32 a side, and the lead-in wire 4 is securely fixed to the connection pin 3 by the caulking deformed portion 36 a. At this time, the position of the lead-in line 4 is not easily shifted from the vicinity of the caulking direction line XX because the position thereof is regulated by the guide portions 34a and 35a. Thereby, the lead wire 4 and the non-circular cross-section connection pin 3 are fixed stably by caulking deformation.

  In FIG. 2A, the guide portions 34a and 35a are formed so as to be symmetric with respect to the opposing inner walls 32a and 33a. For this reason, the introduction line 4 is arranged so that its center is substantially located at the midpoint O of the line segment AB connecting the two intersections A and B of the crimping direction line XX and the two flat surfaces 31. Yes. However, the guide portions 34a and 35a may be any one that positions the center of the introduction line 4 in the vicinity of the caulking direction line XX. Therefore, for example, the guide portions 34a and 35a do not need to be formed symmetrically with each other, and only one of them may be formed.

  The guide portions 34a and 35a may be configured so that the lead-in wire 4 can be smoothly inserted into the connection pin 3 and does not easily shift in the connection pin 3. Several protrusions arranged along the extending direction may be used.

  In FIG. 3, the guide portions 34 b and 35 b are point-symmetric with respect to the midpoint O of the line segment AB connecting the two intersections A and B of the caulking direction line XX and the two flat surfaces 31. Further, in this embodiment, the inner walls 32b and 33b of the flat surface 31 are respectively formed.

  Also in this case, the guide line 34b, 35b prevents the introduction line 4 inserted into the connection pin 3 from being easily displaced from the vicinity of the caulking direction line XX. The pin 3 can be securely fixed. Here again, the guide portions 34b and 35b do not necessarily have point symmetry with respect to the midpoint O of the line segment AB, or may not be linear protrusions extending in the direction of the connection pin 3; As long as the center of is positioned along the vicinity of the caulking direction line XX.

  Instead of providing a guide portion for smoothly inserting the lead-in wire 4 into the connection pin 3, it is also possible to perform caulking deformation twice and use one of them as the guide portion. Such an embodiment is shown in FIG.

  This embodiment is particularly effective when the position of the introduction line 4 greatly deviates from the caulking direction line XX as shown in FIG.

  FIG. 4B shows a state after the first caulking deformation, and a convex guide portion 34c is formed on one inner wall 32c. The guide portion 34 c here cannot completely fix the lead-in wire 4 and the connection pin 3, but is sufficient to hold the lead-in wire 4 between the arc portion of the inner wall of the connection pin 3. is there. If the second caulking deformation that forms the caulking deformation portion 36c on the other inner wall 33c is performed on the held introductory line 4 as shown in FIG. The pin 3 can be securely fixed, and a sufficient electrical connection can be obtained.

  On the other hand, when the lead-in wire 4 is not deviated from the caulking direction line XX in the connection pin 3, the lead-in wire 4 and the connection pin 3 are more firmly fixed by performing caulking deformation twice. Therefore, a more reliable electrical connection can be realized. In this way, according to this embodiment, the lead-in wire 4 and the connection pin 3 can be reliably fixed regardless of where the lead-in wire 4 is located in the connection pin 3.

FIG. 2 is a side view schematically showing a part of the fluorescent lamp of the present invention broken away, and a schematic front view of a base. It is sectional drawing which shows schematically the connection pin of the nozzle | cap | die of the fluorescent lamp in one Embodiment of this invention. It is sectional drawing which shows schematically the connection pin of the nozzle | cap | die of the fluorescent lamp in other embodiment of this invention. It is sectional drawing which shows schematically the connection pin of the nozzle | cap | die of the fluorescent lamp in other embodiment of this invention. It is the side view and the schematic front view of a nozzle | cap | die which a part of conventional fluorescent lamp is fractured | ruptured and shown schematically. It is sectional drawing which shows schematically the connection pin of the nozzle | cap | die of the conventional fluorescent lamp. It is sectional drawing which shows schematically the connection pin which has a flat cross section. It is sectional drawing which shows schematically the connection pin which has a flat cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent lamp 2 Cap 3 Connection pin 4 Lead line 10 Lamp main body 31 Flat surface 32a, 32b, 33a, 33b Inner wall 34a, 34b, 35a, 35b Guide part XX Caulking direction line

Claims (5)

A base provided at the end of the lamp body;
A connection pin provided extending from the base, having a flat cross-sectional shape, and having a hollow space inside;
One is connected to the electrode, the other is inserted into the inner space of the connection pin, and the lead wire is fixed to the inner wall of the connection pin by caulking deformation of the flat surface of the connection pin,
Including
A fluorescent lamp in which, in a region where the flat surface of the connection pin is caulked and deformed, a projecting guide portion for restricting the position of the lead-in line is provided on the inner wall of the flat surface of the connection pin.   At least one set of the guide portions is formed so that the center of the introduction line is positioned in the vicinity of the caulking direction line extending in the perpendicular direction of the two flat surfaces through the points to be caulked and deformed on the flat surface. The fluorescent lamp according to claim 1, wherein   The fluorescent lamp according to claim 2, wherein the guide portion is formed so as to be line symmetric with respect to the caulking direction line.   The fluorescence according to claim 2, wherein the guide portion is formed so as to be point-symmetric with respect to a midpoint of a line segment connecting two intersections of the caulking direction line and the two flat surfaces. lamp.   The fluorescent lamp according to any one of claims 2 to 4, wherein the guide portion is a linear protrusion along an extending direction of the connection pin.

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