JP3413703B2 - Lamp socket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in type lamp socket for supporting a straight tube type fluorescent lamp.

[0002]

2. Description of the Related Art A plug-in type lamp socket has a socket body inserted through a front wall of a socket body to movably mount the socket body, and a pair of elastically deformable contact conductors incorporated in the socket body. There is. Then, the lamp pin inserted into the lamp pin insertion hole of the cap receiver is inserted between a pair of pin contact pieces forming a pin contact end portion of the contact conductor at one end thereof, and these contact piece portions are inserted. The elastic force of the lamp pinches the lamp pin from both sides in the radial direction to obtain an electrical connection between the lamp pin and the contact conductor and a holding force for the fluorescent lamp.

A lamp socket having such a structure is disclosed in Japanese Utility Model Publication No. 52-88375, particularly FIGS. 2 and 3, and Japanese Utility Model Publication No. 55-39571, particularly column 3, line 3 to column 5, line 5. And known from FIGS. 1-3. As shown in these publications, a pair of contact piece portions forming a pin contact end portion are continuous with each other, and a pin inlet is provided between the tip portions thereof, through which the lamp pin is provided between the pair of contact piece portions. It is supposed to be inserted.

By the way, since the diameter of the lamp pin is specified by JIS to be 2.29 mm to 2.67 mm, the pin entrance at the pin contact end is formed with a gap of about 1.5 mm correspondingly. , It is considered to obtain the predetermined lamp holding power specified by the Electrical Appliance and Material Control Law. The lamp holding force is a force required to pull out the lamp pin inserted into the lamp socket, and is defined as [(1 to 8) N / pin] in the above-mentioned law. In addition,
N is Newton. To obtain such holding power,
Conventionally, when the contact conductor is manufactured, the pin entrance which is pre-opened is provided at the pin contact end by press molding.

[0005]

However, due to the influence of variations in the hardness of the spring material constituting the contact conductor, the pin entrance between the pair of continuous pin pinching pieces forming the pin contact ends is formed. It is unavoidable that the size of the gap varies.

If the gap at the pin entrance becomes large due to such variations, it will fall below the standard value of the predetermined lamp holding force described above. Then, in particular, in a combination in which a lamp pin having a small diameter is inserted in consideration of a variation in the diameter of the lamp pin, there is a problem that reliability of holding the fluorescent lamp with an appropriate force is lowered. On the contrary, when the clearance at the pin entrance becomes small due to the variation in the pin entrance, the standard value of the lamp holding power is exceeded. Then, especially in a combination where a lamp pin with a large diameter is inserted in consideration of the variation in the diameter of the lamp pin, an excessive insertion force is required for the work, or the lamp pin is caught at the pin entrance or the insertion becomes defective. There is a problem called.

Therefore, in the press work for molding the pin contact portion of the contact conductor, strict process control is required, which causes a problem that the productivity of the contact conductor is not good.

Therefore, the first problem to be solved by the present invention is that the straight tube type fluorescent lamp can be stably held, the variation in the inserting force of the lamp pin can be reduced, and the manufacturability of the contact conductor is improved. Is to obtain a lamp socket that can also improve.

A second problem to be solved by the present invention is to solve the above-mentioned first problem and to obtain a lamp socket which can easily incorporate the contact conductor into the socket body.

[0010]

DISCLOSURE OF THE INVENTION The present invention is directed to a cap receiving body having a lamp pin insertion hole, a socket body having the cap receiving body inserted through a front wall so as to be movable in the thickness direction thereof, and the socket. The socket cover, which is attached to the socket body by closing the rear opening of the body, and the pin contact end, which comes into contact with the lamp pin of the straight tube fluorescent lamp inserted into the lamp pin insertion hole, at one end, the socket cover An elastically deformable contact conductor embedded in the body, and a pair of pin holding pieces having pin contact ends that are continuous with each other, and a pin entrance formed between the tips of the holding pieces. It is premised on a lamp socket in which the lamp pin inserted through the pin contact end portion is inserted between the pair of pin holding pieces.

In order to solve the first problem, the invention of claim 1 is such that, in a state where the contact conductor is not incorporated in the socket body, the pair of pin clamping pieces are elastic at the pin entrance. Forming the pin contact end portion so as to close the pin entrance by contacting each other, and ribs located on both sides of the lamp pin insertion hole and extending in the thickness direction of the base receiving body are provided in the base receiving body, When the contact conductor is assembled in the socket body, the rib is sandwiched between the pair of pin clamping pieces so that the pin entrance is opened according to the thickness of the rib.

According to the first aspect of the present invention, the pair of pin clamping pieces forming the pin contact ends of the contact conductor are elastic in their free state when the contact conductor is not assembled in the socket body due to their elastic force. Since the pin entrance is closed by making contact with each other, manufacturing control such as opening the pin entrance in a predetermined gap in advance can be dispensed with, and the pin contact end portion for closing the pin entrance is formed in this way. Pressing is much easier to manage than making pin openings with a given clearance. Then, when the contact conductor is assembled in the socket body, the pair of pin holding pieces are attached by sandwiching the rib of the mouthpiece receiving body, so that the ribs fit the pin inlets of the pair of pin holding pieces according to the thickness thereof. open. Therefore, regardless of variations in the hardness of the constituent material of the contact conductor,
The clearance at the pin entrance can be made mechanically constant, and the lamp holding power can also be made constant with this constant.

Further, in order to solve the second problem, the invention of claim 2 is such that the end of the rib away from the lamp pin insertion hole is tapered.

According to the second aspect of the present invention, when the pin contacting end portion of which the clearance at the pin entrance is determined by the rib is inserted into the rib, the tapered end portion of the rib is sandwiched by a pair. The pin pinching piece is guided to open the pin entrance to prevent the closed pin entrance from being caught by the end of the rib.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. Reference numeral 11 in FIGS. 1, 4 and 5 denotes a socket housing made of a hard synthetic resin. The housing 11 includes a socket body 12, a cap receiving body 13,
And a socket cover 14.

As shown in FIGS. 2, 6 and 7, the rear surface of the socket body 12 is open. The front wall 12a of the socket body 12 forming the front surface of the socket housing 11 is provided with a receiving body mounting hole 15 located on the front end side of the body 12, and the socket body 1
A plurality of sets of wire insertion holes 16 located on the mounting end side of 2,
17 and unlocking holes 18 and 19 which are arranged in the vicinity of the respective holes 17 are individually provided.

A pair of two wire insertion holes 16 and 17 are provided, and one wire insertion hole in each set is used for feed wiring. In addition, unlocking hole 1
If necessary, a pin-shaped unlocking tool (not shown) is inserted into each of 8 and 19 to release the locked state of the self-locked wire as described later.

As shown in FIGS. 3 to 7, a plurality of guide protrusions 20 are integrally provided inside the socket body 12 around the receiver mounting hole 15. These guide protrusions 20 are formed by ribs or the like extending in the thickness direction of the socket body 12. ing. Further, as shown in FIGS. 3 and 6, a pair of central partition walls 22 and 23, which are located between the electric wire insertion holes 16 and 17 and are close to each other, are integrally provided at the central portion in the width direction inside the socket body 12. Has been. These partition walls 22 and 23 are integrally connected to one guide convex portion 20 so that they are not easily deformed.

As shown in FIG. 6, one central partition wall 22 and one socket 22 are opposed to each other with the electric wire insertion hole 16 and the unlocking hole 18 placed between the walls 22 when viewed from the rear surface side. Side wall 1 on the mounting end side of the socket body 12
Conductor mounting grooves 24, which extend in the thickness direction of the socket body 12 and whose rear ends are opened, are provided on the surfaces facing the 2b so as to face each other. Similarly, the other central partition wall 2
3 and the wall 23 between the socket body 12 and the other electric wire insertion hole 17 and the unlocking hole 19 when viewed from the rear surface side, the side wall 12 on the mounting end side of the socket body 12 facing each other.
Conductor mounting grooves 25, which extend in the thickness direction of the socket body 12 and whose rear ends are released, are provided on the surfaces facing the c, so as to face each other. Reference numeral 26 shown in FIGS. 6 and 7 and the like is a socket mounting groove provided on the outer surfaces of the side walls 12b and 12c, respectively.

The socket cover 14 is connected to the socket body 12 with its rear opening closed. A screw, for example, may be used to attach the cover 14, but in order to omit screwing in the case of the drawing, a locking claw 14a integrally provided with the socket cover 14 shown in FIG. , 14b to the claw receiving portion 12 of the socket body 12.
It is performed by engaging with d and 12e. Nail receiving part 12d
Is a rib provided on the inner surface of the tip portion of the socket body 12 so as to extend in the width direction, and the claw receiving portion 12e is a stepped hole provided in the side walls 12b and 12c.

The ferrule receiving member 13 has, for example, a cylindrical shape in which the front surface is closed and the rear surface is opened, and a plurality of stopper projections 13a protruding outward at the opening edge of the rear surface.
Is provided. The cap receiving body 13 is passed through the receiving body mounting hole 15 from the rear surface opening of the socket body 12, and is provided so as to be movable along the thickness direction (front-back direction) of the socket body 12. In this movement, the base 1
The outer surface of the sliding member 3 slides on the guide protrusions 20 to guide the movement thereof, and the stopper protrusions 13a are caught on the edges of the receiving member mounting holes 15 to prevent the stopper members 13 from coming out of the socket body 12. Has become. In addition, 13
Reference numeral c denotes a rib provided to guide insertion when a pin contact end portion 42, which will be described later, is inserted into the mouthpiece receiving body 13 so as to prevent the end portion 42 from being inserted at an incorrect position. The base 13 is also reinforced.

As shown in FIG. 8 and the like, the base receiver 13
Is its front wall (in other words, the front surface of the socket housing 11)
It has a central insulating wall 31 extending from 13b toward the rear opening, and is located on both sides of this wall 31 to form the front wall 1.
It has a pair of lamp pin insertion holes 32 opened in 3b. Each lamp pin insertion hole 3 is provided inside the cap receiver 13.
The conductor holding portion 33 is provided in correspondence with No. 2.

The holding portions 33 are a pair of stepped portions 33a integrally formed on the inner surface of the central insulating wall 31 and the side wall opposed to the central insulating wall 31, and a pair of mutually parallel and integral with the stepped portion 33a. It is formed to have a guide wall surface 33b and a rib 33c integrally projected from the guide wall surface 33. These step portions 33a, the guide wall surface 33
b and the rib 33c are the lamp pin insertion holes 3
It is located on both sides of 2 and is provided so as to extend from the front wall 13b in the thickness direction of the base receiving body 13. The pair of step portions 33a are provided at the same height position as the lower end position of the lamp pin insertion hole 32, and form one surface of the rib 33c.

A pair of ribs 33c located on both sides of the lamp pin insertion hole 32 are guided to the guide wall surface 33 so that the ribs 33c approach each other.
Ends of the ribs 33c that are protruded from b and are distant from the lamp pin insertion hole 32, in other words, the end 33c1 on the socket cover 14 side are tapered as shown in FIGS. 4 and 8B. Is formed in. The thickness t of each rib 33c other than the end portion 33c1 is smaller than the diameter of the lamp pin 48 described later, and for example, about 2.0 mm in order to securely clamp the lamp pin 48 within the allowable variation range of this diameter. Is set to.

The socket body 1 of the socket housing 11
A pair of contact conductors 41 are provided inside the socket body 12 inside the socket body 12.
It is stored side by side in the width direction. These conductors 41
Is a press-molded clad material composed of a base material layer such as a stainless steel plate having a spring property and a conductor layer such as a copper plate adhered to one surface thereof and having an electric path, as shown in FIG. Pin contact end 42 and locking piece 43
And a support piece portion 44 and a spring plate portion 45. Moreover, as the contact conductor 41, a clad material having a thickness much smaller than the conventional one, for example, a thickness of 0.2 mm is adopted for the reason described later.

The pin contact end 42 is provided at one end of the contact conductor 41 in the longitudinal direction. The contact end portion 42 is provided with a pin inlet 42a between the tip portions thereof as shown in FIG.
It is formed with c. One pin holding piece 42b
Is bent from the spring plate portion 45.

The other pin holding piece portion 42c is narrower in width than the pin holding piece portion 42b, and its front end portion is bent in a dogleg shape so that the pin holding piece portion 42b has a front end portion. The pin inlet 42a is formed between them.
In the free state in which the contact conductor 41 is not incorporated in the socket body 12, the dogleg-shaped front end portion is elastically contacted with one pin holding piece portion 42b to close the pin inlet 42a. It has become. The width of the other pin pinching portion 42c is the guide wall surface 3 facing each other.
It is slightly narrower than the width between 3a.

The locking piece 43 is bent at the other end of the contact conductor 41 in the longitudinal direction from the front end of the support piece 44 in a diagonally rearward direction. The locking piece 43 is elastically contacted with an electric wire (not shown) inserted into the electric wire insertion hole 16 or 17, and the electric wire is held between the clamping surface 1 of the socket body 12.
It is provided for locking between 2g (see FIGS. 4 and 5).

The support piece portion 44 is provided in the middle portion of the contact conductor 41, and the locking piece portion 43 is bent and connected to the front end portion thereof as described above, and the spring plate portion is provided to the rear end portion thereof. 45
Are bent and connected. The support piece portion 44 is provided to fix the contact conductor 41 in the socket body 12, and the disengagement prevention pieces 44a are diagonally cut and raised on both sides in the width direction of the rear end portion thereof. There is.

The spring plate portion 45 integrally connects the pin holding piece portion 42b of the pin contact end portion 42 and the support piece portion 44. The spring plate portion 45 is provided to have a spring property for urging the base receiving body 13 forward. The spring plate portion 45, the support piece portion 44, and the pin holding piece portion 42a on one side have the same width, and the pin holding piece portion 42c and the locking piece portion 43 on the other side are formed narrower than these.

The contact conductor 41 having the above-described structure has the conductor layer facing the back surface of the front wall 12b of the socket body 12, and the socket base body 13 is already set by passing the base body 13 through the base body mounting hole 15. It is inserted in 12 and attached. In this mounting, both side edges of the support piece portion 44 are fitted into the conductor mounting grooves 24 or 25, respectively, which face each other, and the disengagement prevention piece 44a has a wall surface of one of the grooves 24 or one groove of the groove 25. Since it digs into the wall surface, the middle portion of the contact conductor 41 is fixed so as not to move with respect to the socket body 12 by the engagement.

In addition, in the mounting, the pin contact end portion 42 is brought into contact with both side edges of the one pin pinching piece portion 42b and the step portion 33a of the conductor holding portion 33 of the mouthpiece receiver 13, respectively, and The other pin holding piece portion 42c is provided by being inserted between the wall surfaces 33b of the conductor holding portion 33 which face each other. In addition, when the pin contact end 42 is housed in the mouthpiece receiving body 13, both side edges of one pin holding piece 42b are the step 33a, that is, the rib 3 as described above.
3c is engaged with one surface, while the other pin pinching piece 4
Since 2c is engaged with the other surface of the rib 33c, the rib 33c is sandwiched by the pair of pin clamping pieces 42b, 42c.

As a result, the pin holding piece portion 42c is separated from the one pin holding piece portion 42b against the elastic force, and the pin inlet 42a between the tip portions of these holding piece portions 42b, 42c is opened. As shown in FIG. 4, the pin inlet 42a is provided with the lamp pin insertion hole 32 of the cap receiver 13.
It is located directly behind.

When the pin contact end 42 is housed in the socket body 12, the tip 33 of the rib 33c is accommodated.
Since c1 is tapered, the tip 33c1 guides the pair of pin holding pieces 42b, 42c holding the rib 33c to quickly open the pin inlet 42a and close the front end 33c1. It is possible to prevent the pin entrance 42a from being caught. Therefore, the pin contact end portion 42 can be smoothly guided into the mouthpiece receiver 13 and easily assembled, and the workability thereof can be improved.

Then, as described above, the pin contact end 4
2 is connected in the base 13 and the contact conductor 41 is built in the socket body 12, so that the pin contact end 42 does not slide along the back surface of the front wall 13b of the base 13. In other words, it is attached and held immovably with respect to the base receiver 13.

Further, when the contact conductor 41 is attached, the spring plate portion 45 is bent and elastically deformed so as to be slightly convex toward the socket cover 14 from its free state. This is the conductor holding portion 33 of the base receiving body 13 that is passed through the receiving body mounting hole 15 of the socket body 12,
This is realized because the free length of the spring plate portion 45 of the contact conductor 41 is longer than the distance between the socket body 12 and the conductor mounting groove 24 or 25. Note that the concrete attachment of the contact conductor 41 is performed by first attaching the pin contact end portion 42 to the conductor holding portion 33 and then attaching the support piece portion 44 to the conductor attachment groove 24 or 25. Is.

As a result of the above-mentioned mounting, the tip of the pin contact end 42 is held in contact with the back surface of the front wall 13b by the elastic force of the spring plate 45, and the spring plate 45 bends through the contact. The cap receiving body 13 is biased forward by a corresponding repulsive load, whereby the cap receiving body 13 is biased forward and is projected and held on the front surface of the socket body 12. The open pin entrance 40a of the pin contact end portion 42 of the contact conductor 41 mounted in the socket body 12 is arranged continuously with the rear end opening of the lamp pin insertion hole 32 of the cap receiver 13, and is locked. The piece 43 is arranged to face one of the electric wire insertion hole 16 and the unlocking hole 18 or the other electric wire insertion hole 17 and the unlocking hole 19 so as to approach the rear surface opening. The mounting state of such contact conductors 41 is shown in FIG.

To connect an electric wire (not shown) for in-appliance wiring or feed wiring to the lamp socket having such a structure, the core wire of this electric wire may be inserted into the electric wire insertion hole 16 or 17. As a result, the core wire is inserted while pushing the locking piece portion 43 against the elastic force, so that the tip edge of the locking piece portion 43 bites into the core wire, and the core wire is locked by the locking piece portion 43 and the socket. It is sandwiched between the sandwiching surface 12g of the body 12. Thus, the electric wire is locked, and the mechanical and electrical connection between the electric wire and the contact conductor 41 is established.

The lamp socket having the above structure is used by being attached to the fixture body by fitting the socket mounting groove 26 of the socket casing 11 into the socket mount of the fixture body included in the fluorescent lamp lighting fixture (not shown). It In addition, in a fluorescent lamp lighting device arranged on the ceiling side, the socket housing 11 is usually used with its tip facing downward.

Then, in order to connect the straight tube type fluorescent lamp 46 to the lamp socket fixed to the instrument body as shown in FIG. 5, the lamp pin 48 protruding from the base 47 thereof.
Is inserted into the lamp pin insertion hole 32 of the base receiving body 13. Then, first, the lamp pin 48 that has passed through the lamp pin insertion hole 32 enters the already opened pin inlet 42a of the pin contact end portion 42, and separates from the other pin pinching piece portion 43b. While being elastically deformed mainly, is inserted between these contact piece portions 43b and 43c. As a result, the lamp pin 48 is clamped from both sides in the radial direction by the spring force of the pin contact end portion 42, and these electrical connections and the lamp pin 4 are connected.
8 mechanical retention is provided.

By the way, as described above, the pair of pin holding pieces 42 forming the pin contact ends 42 of the contact conductor 41.
b and 42c are contact conductors 42 due to their elastic force.
In a free state in which the pin is not assembled in the socket body 12, the pin inlet 42a is closed by elastically contacting. Therefore, the pin entrance 4 of the pin contact end 42 is previously prepared.
Strict control in manufacturing, such as opening 2a in a predetermined gap, can be dispensed with, and the pin entrance 42
The press work for forming the pin contact end portion 42 for keeping a closed is far easier to manage than the case of forming the pin entrance 42a with a predetermined gap. Therefore, the manufacturability of the contact conductor 41 can be improved, the conductor 41 can be obtained at low cost, and the cost of the entire socket can be reduced.

As described above, the pin contact end portion 42, in which the pin inlet 42a is closed in the free state, when the contact conductor 41 is assembled in the socket body 12,
The rib 33c is attached by sandwiching the rib 33c.
The pin inlet 42a of the pair of pin holding pieces 42b, 42c can be opened according to the thickness of the pin. Therefore, the gap of the pin inlet 42a can be mechanically regulated to a constant dimension regardless of the variation in hardness of the constituent material of the contact conductor 41, and the lamp holding force can be stabilized according to this regulation. For example,
According to the experiment with the above-mentioned configuration, the lamp holding power is approximately at an intermediate level of the standard value stipulated by the Electrical Appliance and Material Control Law [(3 ~
4) N / pin] of the lamp holding power could be stably obtained. Note that N is Newton.

That is, since the lamp holding power can be stabilized as described above, the quality of the lamp socket can be improved and the lamp pin 4 to the socket can be improved.
Variation in the insertion force required for inserting 8 can be reduced. Moreover, since the lamp pin 48 is inserted with the pin inlet 42a opened, the lamp pin 48 can be easily inserted without the pin 48 being caught by the pin inlet 42a and hindering the insertion.

In the first embodiment, as described above, the pin pinching pieces 42b that oppose the lamp pin 48,
The lamp pin 4
8 and the pin connection end 42 are electrically connected, the pinching force of the pin contact end 42 with respect to the lamp pin 48 is independent of the spring property of the spring plate portion 45. As a result, even if there is a shallow and deep difference in the tip position of the inserted lamp pin 48 based on the variation in the total length of the fluorescent lamp 46, the amount of bending of the spring plate portion 45 does not vary, and the electrical connection is affected. The contact reliability with respect to the lamp pin 48 can be improved.

When the lamp pin 48 is inserted to some extent, the base 47 hits the front wall 13b of the base 13, so that after this point, the base 13 remains in the socket body 12 while maintaining the electrical connection. Be pushed into.

By the way, as described above, the support piece portion 44 of the contact conductor 41 has the conductor attachment groove 2 of the socket body 12.
The pin contact end 42 of the contact conductor 41 is fixed to the conductor holding portion 33 of the base receiver 13 so as not to move with respect to the base receiver 13.
As a result, the spring plate portion 45 between the support piece portion 44 and the pin contact end portion 42 is provided on the socket body 12 and the base receiving body 13 while holding both ends thereof.

Therefore, even if the base receiving body 13 is pushed into the socket body 12 as described above, the pin contact end portion 42 does not slide on the back surface of the front wall 13b of the base receiving body 13, and With pushing, the spring plate portion 45, which is bent in advance to a free state and is curved so as to be convex toward the socket cover 14, and the bending direction is already determined, is further bent toward the socket body. Be curved. Thereby, the insertion force of the lamp pin 48 is prevented from being concentrated on the bent portion of the spring plate portion 45 and the support piece portion 44, and the lamp supporting force is increased by the repulsive load corresponding to the bending of the spring plate portion 45 as a whole. Can be obtained. Therefore, the lamp sockets at both ends provide the necessary lamp supporting force to the main body of the fluorescent lamp 4.
6 can be supported. A state in which the fluorescent lamp 46 is supported by the lamp socket is shown in FIG.

As described above, in the structure in which the lamp supporting force is obtained by the repulsive load corresponding to the bending of the entire spring plate portion 45 whose both ends are constrained so as not to move to the member with which it is engaged, as described above. The bending amount of the spring plate portion 45 does not change depending on the tip position of the lamp pin 48 inserted in the
Since the flexure follows the pressing force of the base 47, the variation of the lamp supporting force due to the variation of the total length of the lamp can be reduced and the fluorescent lamp 46 can be stably supported. In addition, as described above, the spring plate portion 45 is entirely bent to obtain the lamp supporting force as the lamp pin 48 is inserted.
It is possible to prevent one point from being concentrated on the bent portion of the support piece portion 44 and the spring plate portion 45. As a result, the fluorescent lamp 46
Even when it is repeatedly attached and detached, it is possible to reduce the risk that the bent portion will be broken, and therefore the quality of the product can be improved.

Along with this, as described above, the spring plate portion 45.
Since the lamp supporting force is obtained by the repulsive load due to the large bending of the whole, the contact conductor 41 can be formed of a thin plate spring material. Therefore, even when the contact conductor 41 is made of a clad material having a high material cost, the cost can be reduced, and thus the cost of the entire lamp socket can be reduced and the cost can be reduced.

Moreover, as described above, the spring plate portion 45 is easily bent as the contact conductor 41 is made thinner. for that reason,
Since the resistance of the contact conductor 41 at the time of inserting the lamp pin 48 is reduced and the operation force for inserting the lamp pin 48 can be reduced, the work of attaching the fluorescent lamp 46 to the lamp socket can be facilitated.

[0051]

Since the present invention is carried out in the form described in detail above, it has the following effects.

According to the lamp socket of the first aspect of the present invention, when the contact conductor is incorporated into the socket body regardless of variations in hardness of the constituent materials of the contact conductor,
The gap at the pin entrance can be mechanically set to a fixed size, and the lamp holding force can be set to a constant value with this setting, so a lamp holding force within the specified value can be reliably obtained.
The contact conductor can hold the straight tube fluorescent lamp in a stable manner, the variation in the insertion force of the lamp pin can be reduced, and the manufacturing control such as opening the pin entrance in advance in a predetermined gap is unnecessary. The manufacturability of can also be improved.

According to the lamp socket of the second aspect of the present invention, the pin entrance is prevented from being caught by the rib when the pin contact end is inserted into the rib of the cap receiving body that determines the clearance of the pin entrance. With this configuration, it is possible to easily incorporate the contact conductor into the socket body while solving the first problem.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a lamp socket according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the configuration of the entire lamp socket according to the first embodiment as viewed from the front side.

FIG. 3 is an exploded perspective view showing the structure of the lamp socket according to the first embodiment as viewed from the rear side with the socket cover removed.

FIG. 4 is a cross-sectional view showing the configuration of the entire lamp socket according to the first embodiment.

FIG. 5 is a sectional view showing a state in which the fluorescent lamp is supported by the lamp socket according to the first embodiment.

FIG. 6 is a rear view showing a state in which the socket body and the cap receiving body of the lamp socket according to the first embodiment are combined.

FIG. 7 is a rear view showing the configuration of the lamp socket according to the first embodiment with the socket cover removed.

FIG. 8A is a rear view showing the configuration of the base receiving body of the lamp socket according to the first embodiment. (B) is FIG.
(A) A sectional view of the mouthpiece receiving body shown along the ZZ line in the middle.

FIG. 9A is a side view showing the configuration of the contact conductor of the lamp socket according to the first embodiment. (B) The front view which shows the structure of the contact conductor of the lamp socket which concerns on 1st Embodiment.

[Explanation of symbols]

12 ... Socket body, 13 ... Base holder, 14 ... Socket cover, 14b ... the front wall of the base, 32 ... Lamp pin insertion hole, 33 ... Conductor holding part, 33c ... rib, 33c1 ... the tip of the rib, 41 ... Contact conductor, 42 ... Pin contact end, 42a ... Pin entrance, 42b, 42c ... Pin holding pieces, 48 ... Lamp pin.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-130880 (JP, A) JP-A-54-103595 (JP, A) Actually open Sho-53-93071 (JP, U) Actual-open Sho-57- 180907 (JP, U) Actual development Sho 52-88375 (JP, U) Japanese Patent Sho 55-39571 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 33/08 F21V 19 / 00 320

Claims (2)

(57) [Claims] 1. A cap receiving body having a lamp pin insertion hole, a socket body in which the cap receiving body is inserted through a front wall so as to be movable in a thickness direction thereof, and a socket body is closed by closing a rear opening of the socket body. It has a socket cover attached to the socket body and a pin contact end that contacts the lamp pin of the straight tube fluorescent lamp inserted in the lamp pin insertion hole at one end, and is elastically deformable built in the socket body. And a pair of pin clamping pieces having continuous pin contact ends, and the pin contact ends are inserted into the pin contact ends through a pin inlet formed between the tips of the pinching pieces. In a lamp socket in which the inserted lamp pin is sandwiched by the pair of pin sandwiching pieces, the pin in the state where the contact conductor is not assembled in the socket body. At the entrance, the pair of pin clamping pieces are elastically contacted to form the pin contact end so as to close the pin entrance, and are located on both sides of the lamp pin insertion hole in the thickness direction of the cap receiver. A rib extending to the base of the base, and when the contact conductor is assembled into the socket body, the rib is sandwiched between the pair of pin clamping pieces to open the pin entrance according to the thickness of the rib. The lamp socket is characterized in that 2. The lamp socket according to claim 1, wherein an end of the rib away from the lamp pin insertion hole is tapered.