JPH09185979A - Single base fluorescent lamp socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a member for pushing up a lamp pin unnecessary, reduce the number of components, make structure simple, and provide electrically stable connection. SOLUTION: A projecting part 6 is formed on a base bottom surface 5a of a single base fluorescent lamp 1. A locking part 7 is projected on the side surface of the projecting part 6. A lamp pin 8 is projected on the outside of the projecting part 6. A housing recess 9 capable of inserting the projecting part 6 is formed in the center of a socket main body 3. An elastic contact locking spring 10 is arranged so as to be capable of rotating on the bottom side of the housing recess 9. The tip of the projecting part 6 is elastically brought into contact with a pushing up spring part 11 of the elastic contact locking spring 10, and the locking part 7 is engaged with a rotating engaging part 14. A locking wall 13 which engages with the locking part 7 and stops drawing out is formed within the housing recess 9. The projecting part 6 of the single base fluorescent lamp 1 is inserted into the housing recess 9 and it is fixed to the socket main body 3 by turning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single base fluorescent lamp socket.

[0002]

2. Description of the Related Art A conventional single-ended fluorescent lamp socket of this type has been disclosed in Japanese Utility Model Laid-Open No. 182578/1979 as shown in FIG.
As shown in FIG. 19 and FIG. 19, the socket main body 3 for holding the lamp base 5 and the plug receiver 87 having the socket 86 rotatably provided in the socket main body 3 for inserting the lamp pin 8 are formed.
And a contact 85 that elastically contacts the inner edge of the receiving opening 86 and presses the tip end surface of the lamp pin 8 and the contact 85 formed on the socket body 3 by twisting the lamp base 5 to engage with each other.
There is known a structure including an engaging portion 88 that is held by an elastic force acting on. In FIG. 18B, 29 is an electric wire, 89
Is a coil spring, and 300 is a stopper body.

[0003]

However, in the conventional single base fluorescent lamp socket, the contact 85 for contacting the lamp pin 8 is provided for each lamp pin 8, and the contact 85 is further provided.
Since the coil spring 89 for pushing up is provided for each contact 85, there is a problem that the number of parts is large, the structure is complicated, and the assemblability is deteriorated. Lamp 1
At the time of the rotation of a, the electric wire 29 also rotates at the same time as the rotation of the plug receiver 87 in which the above-described components are incorporated, and it is necessary to look for a margin in the wiring of the electric wire 29. In addition to providing a separate rotation holding mechanism, the structure becomes more complicated, and the tip of the lamp pin 8 is pushed up while the contact 85 is point-contacted, which results in butt contact, and temporarily the lead of the wire 29 is lead. There is also a problem that contact instability tends to occur when a line is present.

The present invention has been made in view of the above points, and does not require a member for pushing up the lamp pin, has a small number of parts, has a simple structure, and is capable of obtaining an electrically stable connection state. An object is to provide a socket.

[0005]

In order to solve the above-mentioned problems, the present invention uses a base 5 of a single-base fluorescent lamp 1 as a socket body 3.
In a single-base fluorescent lamp socket that is inserted into and twisted into the socket body 3 to prevent the socket body 3 from coming off, a protruding portion 6 is projected from the base surface 5a of the single-base fluorescent lamp 1 in a direction substantially perpendicular to the base surface 5a, and Protrusion 6 on the side of part 6
The locking portion 7 in a direction substantially orthogonal to the protruding direction of the
A plurality of sets of lamp pins 8 are provided on the outside of the base in a direction substantially parallel to the protrusion 6 from the bottom face 5a of the base so that the tip is located closer to the bottom face 5a of the base than the tip of the protrusion 6. Then, a storage recess 9 into which the projection 6 can be inserted is provided on the center side of the socket body 3, and an elastic contact locking spring 10 is rotatably arranged on the bottom surface side in the storage recess 9 so as to rotate. Reference numeral 10 denotes a push-up spring portion 11 that is cut and raised from the bottom surface side of the elastic contact locking spring 10 toward the opening side of the storage recessed portion 9 and elastically contacts the tip of the protruding portion 6 of the single base fluorescent lamp 1.
The locking portion 7 protruding from the side surface of the protrusion 6 is provided with a rotary engaging portion 14 that engages in the rotation direction G of the single-ended fluorescent lamp 1, and the single-ended fluorescent lamp is provided around the storage recess 9. 1 is provided with a pin insertion hole 12 into which each lamp pin 8 can be inserted, and a locking wall 13 for locking the projection 6 with respect to the storage recess 9 by engaging the locking portion 7 in the storage recess 9. The single-base fluorescent lamp 1 can be mounted on the socket body 3 by rotating the single-base fluorescent lamp 1 with the projection 6 of the single-base fluorescent lamp 1 inserted into the housing recess 9 and the lamp pin 8 inserted into the pin insertion hole 12. With this configuration, the spring portion 11 pushes up the protrusion 6 projecting from the bottom face 5a of the single-screw fluorescent lamp 1, and the spring portion 11 pushes up the engaging portion 7 protruding from the side surface of the protrusion 6. Since the joint portion 14 is rotated and guided to the locking wall 13, One of the simple structure of rotating the resilient contact locking springs 14, the base 5 of the single base fluorescent lamp 1 can be easily and reliably attached to the socket body 3. Moreover, since only the elastic contact locking spring 10 rotates when the single-base fluorescent lamp 1 rotates, the electric wire 29 connected to the lamp terminal 26 does not rotate, so that it is not necessary to look around the electric wire 29. The connection status is stabilized.

Here, the elastic contact locking spring 10 is formed by bending a base piece portion 11a formed by cutting and raising a pair of push-up spring portions 11 and a substantially vertical direction from both side ends facing the base piece portion 11a. It is preferable that the pair of rotary engaging portions 14 are integrally formed. In this case, when the protrusions 6 elastically contact each other, the pair of push-up spring portions 11 more reliably apply a spring force to the protrusions 6. Yes, locking part 7 and locking wall 1
The pressing force with respect to 3 can be increased.

An annular rib 15 is formed in contact with the bottom surface portion 10a of the elastic contact locking spring 10 including the base piece portion 11a of the push-up spring portion 11 so as to be concentric with the rotation center of the elastic contact locking spring 10. It is preferable to provide it on the socket cover 4. In this case, the frictional force between the annular rib 15 and the bottom surface portion 10a of the elastic contact locking spring 10 becomes small and the operation becomes easy.

The bottom portion 10a of the elastic contact locking spring 10
It is preferable to form the narrowed portion 16 along a direction substantially orthogonal to the tangential direction of the annular rib 15 and to provide the annular rib 15 of the socket cover 4 with a locking step portion 17 for locking the narrowed portion 16. In this case, by locking the narrowing portion 16 and the locking step portion 17, it is possible to provide a strong click feeling when the single-base fluorescent lamp 1 is rotated, and it is difficult to cause a halfway state of the single-base fluorescent lamp 1. can do.

When the push-up spring portion 11 is elastically deformed by the protrusion 6 on the elastic contact lock spring 10, the biasing piece 1 for biasing the push-up spring portion 11 in the direction of pushing it against the lock portion 7.
In this case, when the single-ended base fluorescent lamp 1 is pushed in and the protrusion 6 pushes up the spring portion 11 to elastically deform, the urging piece 18 causes the rotary engagement portion 14 to fall inward and the single-ended base portion. By being pressed against the base 5 of the fluorescent lamp 1, the rotary engagement portion 14 of the elastic contact engagement spring 10 can be reliably engaged with the engagement portion 7 protruding from the side surface of the protrusion 6.

Rotational engaging portion 1 of the elastic contact locking spring 10
It is preferable to provide a temporary holding portion 19 at the tip of 4 for temporarily holding the locking portion 7 in the insertion direction H of the single-base fluorescent lamp 1 by engaging with the locking portion 7. In this case, an elastic contact locking spring is provided. 10 has a function of temporarily holding the single-base fluorescent lamp 1,
It is possible to prevent the single-ended fluorescent lamp 1 from dropping during the incomplete rotation.

The elastic contact locking spring 10 is made of a conductive material, and the elastic contact locking spring 10 constitutes a movable contact of the interlock switch. When the single base fluorescent lamp 1 is completely mounted, the contacts of the interlock switch are contacted. Is preferably turned on. In this case, since the interlock switch is kept in the off state when the lamp pin 8 and the lamp terminal 26 are in incomplete contact with each other, a high voltage is not applied to the single base fluorescent lamp 1. No worry about fever and fire.

A window hole 21 is formed in the outer shell of the socket 2 facing the elastic contact locking spring 10, and the elastic contact locking spring 10 is opened in either the insertion start state or the mounted state of the single-base fluorescent lamp 1. It is preferable that the elastic contact locking spring 10 is not exposed to the window hole 21 on the other side, and in this case, the angle of the elastic contact locking spring 10 is good and the elastic contact locking spring 10 is not contacted after the assembly. The presence / absence of the locking spring 10 can be easily confirmed by visual inspection without inverting the socket 2.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below. In the present embodiment, as shown in FIG. 1, a U-shaped fluorescent lamp 1a is used as the single base fluorescent lamp 1, and a projection 6, a locking portion 7 and a lamp pin 8 respectively project from the base 5a of the base of the lamp 1a. It is set up.

First, the projecting portion 6 is formed in a rectangular shape in plan view, and with respect to the bottom surface 5a of the base so as to be in a direction opposite from the bottom surface 5a of the base 1b and substantially parallel to the central axis of the lamp 1b. The projections 6 are projected in the vertical direction, and the locking portions 7 are respectively provided on both side surfaces of the projection 6 in a direction substantially orthogonal to the projection direction of the projection 6. In this embodiment, each locking portion 7 projects in a substantially V shape when viewed from the side surface, and the projecting direction of this locking portion 7 is a direction substantially parallel to the direction connecting the two lamp pins 8 forming a pair. Is set to. Further, two sets of lamp pins 8 are provided on the outside of the projecting portion 6 from the base 5a of the base of the projecting portion 6 in a direction substantially parallel to the projecting portion 6, one set of two lamp pins 8 in total. Two lamp pins 8 are provided on each side surface of the protrusion 6 other than the side surfaces on which the locking portion 7 is provided.
The tip of each lamp pin 8 is closer to the bottom surface of the base 5 than the tip of the protrusion 6.
It is formed at a height lower than that of the protrusion 6 so as to be located on the a side. Reference numeral 22 in the drawing denotes a misuse prevention rib provided at a corner of the bottom surface 5a of the base.

On the other hand, the socket 2 comprises a substantially cylindrical socket body 3 and a socket cover 4, the front surface of the socket body 3 being the mounting surface of the lamp 1a, and the back surface being the mounting surface of the socket cover 4. ing. At the center of the socket body 3, there is provided a storage recess 9 into which the projection 6 is rotatably inserted by a predetermined angle, and a pair of locking portions 7 can be inserted into the inner sidewalls of the storage recess 9 facing each other. Engaging portion insertion grooves 23 are formed, and the protruding portions 6 are accommodated in the engaging recesses 23 by engaging with the engaging portions 7 at the sides of the engaging portion insertion grooves 23 along the rotation direction G of the lamp 1a. Locking walls 13 are provided to prevent the 9 from coming off. This locking wall 13
Is inclined toward the inner side of the storage recess 9 as it goes from the lower end to the upper end, and the upper inclined surface of the locking portion 7 abuts on the locking wall 13 so that the protrusion 6 is stored. The recess 9 is prevented from coming off.

An elastic contact locking spring 10 is rotatably arranged on the bottom side in the storage recess 9. The elastic contact locking spring 10 includes a push-up spring portion 11 that is cut and raised from the bottom surface 10a of the elastic contact locking spring 10 toward the opening side of the storage recess 9 and elastically contacts the tip of the projection 6 of the lamp 1a. The lamp 1 is attached to the locking portion 7 protruding from the side surface of the protrusion 6.
The rotation engaging portion 14 that engages in the rotation direction G of a is provided. In the present embodiment, the elastic contact locking spring 10 has a base piece portion 11 formed by cutting and raising a pair of push-up spring portions 11.
a and a pair of rotary engaging portions 14 that are bent in a substantially vertical direction from both end portions facing the base piece portion 11a are integrally formed. The pair of push-up spring portions 11 are respectively cut and raised from the bottom surface portion 10a of the elastic contact locking spring 10 so as to have a V-shape when viewed from the side surface. When the surfaces are elastically contacted, the push-up spring portion 11 is elastically deformed, and a spring force can be reliably applied to the protrusion 6. On the other hand, the pair of rotary engaging portions 14 are formed in a U shape in plan view with one side surface opened, and are arranged such that their opening sides face each other. Each of the parts 7 can be freely inserted. Further, a shaft hole 24 serving as a rotation center of the elastic contact locking spring 10 is formed in the center of the bottom surface portion 10a of the elastic contact locking spring 10, and the push-up spring portions 11 are formed on both sides of the shaft hole 24. A pair of strip-shaped narrowed portions 16 are formed so as to bulge in a substantially parallel direction and below the bottom surface portion 10a of the elastic contact locking spring 10. In the present embodiment, the throttle portion 16 has not only a function of strengthening the spring force of the push-up spring portion 11 but also a function of a so-called click rib for strongly providing a click feeling when the lamp 1a rotates. ing.

On the other hand, at the center of the socket cover 4, a rotation center rib 25 which is inserted into the shaft hole 24 of the bottom surface portion 10a of the elastic contact locking spring 10 is provided so as to project. Has a ring rib 15 concentric with the rotation center rib 25 and shorter than the rotation center rib 25. The ring rib 15 has an upper surface on which the base piece 11a of the push-up spring portion 11 is attached. The bottom surface portion 10a of the elastic contact locking spring 10 including is supported. Also, ring rib 15
The upper surface of the elastic contact locking spring 10 has a pair of locking step portions 17 corresponding to the pair of throttle portions 16 provided on the bottom surface 10a of the elastic contact locking spring 10.
Is provided. In the present embodiment, each locking step portion 17
As shown in FIG. 4, is composed of a pair of front and rear recessed grooves 17a and 17b arranged in the circumferential direction of the annular rib 15, and its length direction coincides with the direction substantially orthogonal to the tangential direction of the annular rib 15. The narrowed portion 16 can be locked in either one of the both concave grooves 17a and 17b.

Further, as shown in FIG. 1, around the accommodating recess 9 of the socket body 3, a pair of two is arranged in a circular arc shape in plan view concentric with the accommodating recess 9 at a position corresponding to a total of two sets of lamp pins 8. The pin insertion holes 12 are formed respectively, and the lamp terminals 26 of the same number as the lamp pins 8 are arranged below the pin insertion holes 12 in correspondence with the lamp pins 8. Each of the lamp terminals 26 is formed by bending a conductive plate-like member into a U-shape in a plan view, and has a tip end thereof that holds the lamp pin 8 between the clamping contact portions 26 a.
Are formed. Also, at the bottom of each lamp terminal 26,
The quick-connect terminal 28 for connecting an electric wire is integrally formed through the connecting piece 28a, and the electric wire 29 can be connected to the quick-connect terminal 28 from the outside of the socket 2 through the pin hole 112 penetrating the terminal block 27 of the socket cover 4. Has become.

A pair of fitting claws 30 are provided on both ends of the socket cover 4 so as to project in the vertical direction. On the other hand, the socket cover 4 is fitted on both outer side surfaces of the socket body 3 at positions corresponding to the fitting claws 30. The fitting hole 31 is provided as a recess, and the fitting claw 30 is fitted into the fitting hole 31.
By fitting the socket body 3 to the socket cover 4
Can be easily installed. Next, the operation will be described.

First, the elastic contact locking spring 10 is rotatably arranged on the bottom surface side of the housing recess 9 of the socket body 3, and the lamp terminal 26 is arranged below the pin insertion hole 12 of the socket body 3. Then, the socket body 3 is attached to the socket cover 4. After that, a total of two sets of lamp pins 8 located outside the projection 6 are individually aligned with the pin insertion holes 12 around the storage recess 9, respectively.
The protrusion 6 protruding from the base 5a of the base of the lamp 1a is inserted into the storage recess 9 of the socket body 3. At this time, the locking portion 7 protruding from the side surface of the protruding portion 6 passes through the locking portion insertion groove 23 of the storage recess 9 and the rotary engaging portion 1 of the elastic contact locking spring 10.
4 (state of FIGS. 2A to 2C). on the other hand,
The lamp pin 8 on the outer side of the protrusion 6 is inserted from one end of the pin insertion hole 12 which is concentric with the storage recess 9 and is held in a non-contact state with the lamp terminal 26 located below the pin insertion hole 12. Lamp pin 8 and lamp terminal 2 at the stage
6 is kept in an insulated state.

After that, as shown in FIG. 2C, the lamp 1a is rotated while the bottom surface 5a of the lamp 1a is pressed against the front surface of the socket body 3. At this time, the protrusions 6 hit the push-up spring portions 11 to elastically deform the pair of push-up spring portions 11. Further, the rotation of the lamp 1a causes the engagement portion 7 of the elastic contact engagement spring 10 engaged with the rotation engagement portion 14 to rotate the rotation engagement portion 14. As a result, the elastic contact locking spring 10 rotates in the same direction as the lamp 1a (direction of arrow G in FIG. 1), and the bottom surface portion 10a of the elastic contact locking spring 10 rotates.
The narrowed portion 16 moves from the front concave groove 17a of the annular rib 15 to the rear concave groove 17b and is engaged (the state of FIG. 4A →
The state of FIG. 4B), the click feeling at this time causes the lamp 1
It can be easily known that the locking portion 7 of a has reached an angle at which it can be locked to the locking wall 13 of the storage recessed portion 9. At this stage, when the hand is released from the lamp 1a, FIG. As shown in (b), the protrusion 6 is urged by the spring force of the push-up spring portion 11 in a direction away from the elastic contact locking spring 10, and the locking portion 7 protruding from the side surface of the protrusion 6 is stored in the storage recess 9.
The protrusion 6 is pressed against the locking wall 13 provided on the lamp, so that the protrusion 6 is prevented from coming off the storage recess 9, and the lamp 1a
As a result of the reverse rotation being blocked, the base 5 of the lamp 1a is mechanically connected to the socket body 3. On the other hand, with the rotation of the lamp 1a, the lamp pin 8 moves from one end side to the other end side in the pin insertion hole 12 to make double-sided contact with the lamp terminal 26, and at this stage, the lamp pin 8 and the electric wire 29 are not connected. Is electrically connected via 26, and the lamp 1a
Installation work is completed.

Then, the bottom surface 5a of the base of the single-base fluorescent lamp 1
The spring portion 11 pushes up the protruding portion 6 that protrudes further, and the locking portion 7 protruding from the side surface of the protruding portion 6 is rotated and guided to the locking wall 13, so that one elastic contact locking With the simple structure of rotating the spring 14, the base 5 of the single-base fluorescent lamp 1 can be easily and surely attached to the socket body 3. Moreover, since the spring force is reliably applied to the protrusion 6 from the pair of push-up spring portions 11 when the protrusion 6 elastically contacts, the locking wall 13 of the locking portion 7 is provided.
The pressing force to Therefore, the number of parts is small and the structure is simple as compared with the case where a contactor that contacts the lamp pin is provided for each lamp pin or a coil spring for pushing up the contactor is provided for each contact as in the past. Assembling is improved. Moreover, the lamp 1a
Since only the elastic contact locking spring 10 rotates and the lamp terminal 26 does not rotate at the time of rotation, the electric wire 29 connected to the quick-connect terminal 28 provided on the lamp terminal 26 also does not rotate, and the electric wire 29 is laid out. There is no need to look at the margin, waste is eliminated, and the lamp terminal 26 is a contact type that contacts both sides of the lamp pin 8. The contact stability is improved compared to the conventional pressing contact type, and electrical contact is improved. There is also an advantage that the connection state is further stabilized.

Further, the bottom surface portion 1 of the elastic contact locking spring 10
0a is supported by the annular rib 15 provided on the socket body 3, and the narrowed portion 16 is formed on the bottom surface portion 10a of the elastic contact locking spring 10, so that the annular rib 15 of the socket cover 4 is formed.
Since the locking step portion 17 for locking the throttle portion 16 is provided in the
By locking the narrowed portion 16 and the locking step portion 17, the lamp 1
It is possible to give a strong click feeling when rotating a, and it is possible to make it difficult to generate a halfway state of the lamp 1a, so that it is possible to further improve contact stability, and
The bottom surface 10a of the elastic contact locking spring 10 is formed by the annular rib 15.
By supporting the ring rib 15 and the elastic contact locking spring 1
The contact area with the bottom portion 10a of 0 becomes small, the frictional force at the time of rotation of the elastic contact locking spring 10 can be reduced, and the operability can be improved. In order to prevent the bottom surface 10a of the spring 10 from being deformed, the spring force of the push-up spring portion 11 becomes strong, and accordingly, the locking force between the locking portion 7 and the locking wall 13 of the storage recess 9 is increased. As a result, the lamp 1a can be held more reliably.

Moreover, in the present embodiment, since the annular rib 15 also supports the base piece 11a of the push-up spring portion 11, even if stress concentrates on the root portion of the push-up spring portion 11, the annular rib 15 Since the deformation of the base piece 11a can be prevented at 15, there is also an advantage that the function of the elastic contact locking spring 10 can be maintained for a long time. Next, the elastic contact locking spring 1
As another embodiment of 0 ', as shown in FIGS.
When the protrusion 6 protruding from the base 5a of the base of the lamp 1a elastically contacts the push-up spring 11 of the elastic contact locking spring 10 'and the push-up spring 11 is elastically deformed, the push-up spring 11 is pressed against the lock 7. Urging piece 18 urging in the direction
May be provided. Further, in this embodiment, FIG.
As shown in FIG.
7c, the bottom surface 10a of the elastic contact locking spring 10 'is inclined toward the outer peripheral end 17c of the concave groove. It is supported in contact. Other configurations are similar to those of the embodiment shown in FIGS. Therefore, when the lamp 1a is pushed in and the push-up spring portion 11 is elastically deformed by the protrusion 6, the outer peripheral end 17c of the locking step portion 17 is a fulcrum of the deformation of the push-up spring portion 11, as shown in FIG. 6B. As a result, the rotary engaging portion 14 falls inward and the base 5 of the lamp 1a is elastically sandwiched from both sides, so that the elastic contact locking spring 1
It is possible to securely engage the 0'rotational engaging portion 14 with the locking portion 7 protruding from the side surface of the protrusion 6 of the lamp 1a, and further, when the lamp 1a is pushed, the rotational engaging portion 1 is pressed.
4 makes elastic contact with the base 5 of the lamp 1a, so that the lamp 1a
It is possible to further improve the reliability of preventing the slippage and retaining during rotation.

As yet another embodiment of the elastic contact locking spring 10 ", as shown in FIGS. 8 to 10, the tip of the rotary engaging portion 14 is engaged with the engaging portion 7 and engaged. You may make it provide the temporary holding part 19 for temporarily holding | maintaining the part 7 in the insertion direction H of the lamp 1a.Other structure is the same as that of embodiment of FIGS. The portion 19 is bent in a substantially V shape when viewed from the side surface, and when the protrusion 6 is inserted into the storage recess 9, as shown in FIG. The projection 6 is temporarily held, and when the lamp 1a is rotated, as shown in FIG. 10, the substantially dog-legged temporary holding portion 19 abuts on the locking wall 13 of the storage recess 9 and rotates. It is prevented from coming off together with the engaging portion 14, and the temporary holding portion 19 can be prevented from being deformed. Because have a function of temporarily holding the flop 1a, there is no fear of the lamp drops even when incomplete rotation of the lamp 1a, thus, the temporary holding part 19 will have a falling preventing function of the lamp 1a. Further, by providing the temporary holding portion 19, it is possible to prevent the rotary engaging portion 14 of the elastic contact locking spring 10 ″ from falling too far inward, and the engagement between the rotary engaging portion 14 and the locking wall 13 of the storage recess 9 is prevented. It is possible to ensure the match state.

As yet another embodiment of the present invention, FIG.
As shown in FIG. 15, the elastic contact locking spring 10 may be used as a movable contactor of the interlock switch. By the way, in the prior art, as shown in FIGS. 20 to 22, the lamp 1a is inserted into the lamp hole 202 of the plug blade body 200 arranged between the main body 3 of the straight tube fluorescent lamp socket 2 and the cover 4 and rotated halfway. Since the lamp pin 8 can be stopped when the conductive spring 60 made of a conductive material and connected to the contactor 201 is lightly touched (states of FIG. 21 (b) (e) and FIG. 22), it lights up when energized in this state. However, when vibration is applied, there is a disadvantage that discharge is repeated between the conductive spring 60 and the lamp pin 8.

Therefore, in this embodiment, FIG. 12 and FIG.
As shown in FIG. 3, the elastic contact locking spring 10 is formed of a conductive material, and the convex portion 20 is provided on the outer surface of the rotary engaging portion 14 of the elastic contact locking spring 10 so as to project. It is used as a movable contactor of an interlock switch that comes into contact with and separates from a fixed contact 70 fixed to a position below the locking wall 13 of 9. The fixed contact 70 is arranged at a position slightly recessed from the inner wall of the storage recess 9, and this recess is used as a click stop groove, and the projection 20 of the elastic contact locking spring 10 is inserted into this part. By this, the convex portion 2
In addition to the function as a movable contact, 0 can also serve as a member that prevents the lamp 1a locked to the socket body 3 from being reversely rotated and released from the locked state. Here, FIG. 15 shows a lamp circuit. In the figure, 81 is a DC power source, 82
Is an inverter, 2 is a socket portion, 1a is a lamp, 20 is a movable contactor, 70 is a fixed contact, and a connection line L between the movable contactor and the fixed contact 70 is connected to a control circuit (not shown). This control circuit is a low voltage circuit, and it is desirable that the voltage and current be such that there is no danger even if a person touches it.

Therefore, the lamp 1a shown in FIG.
From the state of the attachment / detachment position of the lamp 1a shown in FIG.
When the lamp pin 8 approaches the lamp terminal 26 when it is turned 1/2, the movable contact (convex portion 20) of the elastic contact locking spring 10 does not come into contact with the fixed contact 70 at this stage. When 8 is in contact with the lamp terminal 26 (incomplete contact state), the interlock switch is kept off. When the interlock switch is off, the inverter 82 stops oscillating and the lamp 1a
Since a high voltage is not applied to the inverter 8, the inverter 8 can be used both when the lamp 1a is attached and detached (state of FIG. 14A) and when the lamp 1a is incompletely contacted (state of FIG. 14B).
2 stops oscillating, there is no worry of heat generation and ignition, lamp 1
The effect of preventing an electric shock and the prevention of a ground fault when a is imperfectly mounted is obtained, and safety is secured. In addition, lamp 1
When a is completely rotated (state of FIG. 14 (c)), the lamp pin 8 is clamped by the lamp terminal 26, and at the same time, the movable contact 20 and the fixed contact 70 are brought into contact with each other, the interlock switch is turned on, and the lamp is turned on. The inverter 82 of the circuit starts oscillating and a starting voltage (generally, a pulse voltage of 500 V ₀ P or higher) is applied to maintain lighting. Reference numeral 91 in FIG. 12 is an assembly screw.

Yet another embodiment of the present invention is shown in FIGS. In this embodiment, the elastic contact locking spring 10
A window hole 21 is formed in the socket cover 4 facing the socket cover 4, the elastic contact locking spring 10 is made to face the window hole 21 in either the insertion start state or the mounted state of the lamp 1a, and the elastic contact locking is performed in the other side. The spring 10 does not face the window hole 21. Other configurations are similar to those of the embodiment shown in FIGS.

By the way, in the detached state of the lamp 1a, the U-shaped rotary engaging portion 14 of the elastic contact engaging spring 10 is provided with the engaging portion inserting groove 23 provided in the accommodating concave portion 9 of the socket body 3.
Since the lamp 1a cannot be inserted unless it is positioned at the same angle as the above, that is, the locking portion 7 projecting from the side surface of the projection 6 of the lamp 1a has the rotation engaging portion 14 of the elastic contact locking spring 10.
Since it does not go deep into the rotary engagement part 14 by hitting the edge of
It is necessary to keep the angle of the elastic contact locking spring 10 constant.
However, as shown in FIG. 16, the socket 2 is assembled in such a manner that the lamp body 26 and the elastic contact locking spring 10 are sequentially fitted into the socket cover 4 after the socket body 3 is placed downward.
Therefore, the angle of the elastic contact locking spring 10 cannot be directly viewed from above in the assembled posture (FIG. 17).
Therefore, in order to confirm it, it is necessary to take out the socket 2 once from the assembly jig, turn it over, and visually check it.

Therefore, in the present embodiment, the socket cover 4
17A and 17B, a window hole 21 is formed at the position shown by the solid line in FIG. 17A and FIG.
Only when the angle is correct (state of FIG. 17 (a)), the rotary engaging portion 14 of the elastic contact locking spring 10 is made invisible through the window hole 21, and the angle of the elastic contact locking spring 10 is displaced. 17 (b), the rotary engaging portion 14 of the elastic contact locking spring 10 can be seen through the window hole 21. As a result, the elastic contact locking spring 1 can be seen.
Whether or not the angle of 0 is correct can be viewed directly from above the socket cover 4 without turning the socket 2 over, and extra labor can be saved.

When the window hole 21 is formed at the position shown by the broken line in FIGS. 17 (a) and 17 (b), the visual recognition condition opposite to that described above is obtained. That is, when the angle of the elastic contact locking spring 10 is correct, the rotary engaging portion 14 becomes visible through the window 21, and when the angle of the elastic contact locking spring 10 is deviated, the rotary engaging portion 14 opens. 21. In this case as well, even in this case, the quality of the angle of the elastic contact locking spring 10 and the presence / absence of the elastic contact locking spring 10 can be easily visually confirmed without reversing the socket 2 after the assembly. The number of man-hours required to turn over can be reduced and the assembling ability can be improved.

[0033]

As described above, the invention of claim 1 is a single base fluorescent lamp socket in which the base of a single base fluorescent lamp is inserted into a socket body and twisted to prevent the socket body from coming off and engaging. A protrusion is projected from the bottom surface of the base of the fluorescent lamp in a direction substantially perpendicular to the bottom surface of the fluorescent lamp, and a locking portion is projected on a side surface of the projection in a direction substantially orthogonal to the protruding direction of the projection, and the base is outside the projection. Plural sets of lamp pins are projected from the bottom face in a direction substantially parallel to the protrusion and the tip is located closer to the bottom face of the base than the tip of the protrusion. An accommodating recess into which the protrusion can be inserted is provided, and an elastic contact locking spring is rotatably arranged on the bottom side inside the accommodating recess. It is cut and raised to the opening side and the above A push-up spring portion elastically contacting the tip of the protrusion of the light lamp, and a rotation engagement portion that engages with a locking portion protruding from the side surface of the protrusion in the rotation direction of the single-ended fluorescent lamp. , With a pin insertion hole around which the lamp pin of the single-ended fluorescent lamp can be inserted, around the storage recess,
A locking wall is provided in the storage recess for engaging the locking portion to prevent the projection from coming off from the storage recess. The projection of the single-ended fluorescent lamp is inserted into the storage recess and the lamp pin is used as a pin insertion hole. Since it can be attached to the socket body by rotating the single-ended fluorescent lamp while it is inserted, the spring that pushes up the protrusion protruding from the bottom of the base of the single-ended fluorescent lamp pushes up the locking portion that protrudes from the side surface of the protrusion. Since the rotation engaging part rotates and guides it to the locking wall, the simple structure of rotating one elastic contact locking spring makes it possible to easily and securely mount the base of the single base fluorescent lamp to the socket body. You can Therefore, as compared with the conventional case where a contactor that contacts the lamp pin is provided for each lamp pin, or a coil spring for pushing up the contactor is provided for each contactor,
The number of parts is small, the structure is simple, and the assemblability is good. Moreover, since only the elastic contact locking spring rotates and the electric wire does not rotate during rotation of the single-base fluorescent lamp, it is not necessary to look for a margin in wiring the electric wire, and the electric connection state can be stabilized.

According to a second aspect of the present invention, in the elastic contact locking spring according to the first aspect, the base piece portion formed by cutting and raising the pair of push-up spring portions is substantially perpendicular to both side ends facing the base piece portion. Since the pair of rotary engaging portions bent and formed in the direction are integrally formed, in addition to the effect according to claim 1, when the protrusions are elastically contacted with each other, the pair of push-up springs are more likely to contact the protrusions. The spring force is surely applied, and the base of the single-base fluorescent lamp can be firmly attached to the socket body.

According to a third aspect of the present invention, the bottom surface portion of the elastic contact locking spring including the base piece of the push-up spring portion according to the first or second aspect is in contact with the bottom surface portion of the elastic contact locking spring and is concentric with the rotation center of the elastic contact locking spring. Since the annular rib formed on the socket cover is provided on the socket cover, in addition to the effect according to claim 1 or 2, the contact area between the annular rib and the bottom surface of the elastic contact locking spring is reduced, and the elastic contact locking is achieved. It is possible to improve the operability by reducing the frictional force when the spring rotates.

According to a fourth aspect of the present invention, a narrowed portion is formed on the bottom surface of the elastic contact locking spring according to the third aspect along a direction substantially orthogonal to the tangential direction of the circular ring rib, and the circular ring of the socket cover is formed. Since the rib is provided with the locking step portion for locking the narrowed portion, in addition to the effect according to claim 3, by the locking of the narrowed portion and the locking step portion, a click feeling at the time of rotation of the single base fluorescent lamp is provided. Since it is possible to strongly emit the light, and it is possible to make it difficult to generate the halfway state of the single-ended fluorescent lamp, it is possible to further improve the contact stability.

According to a fifth aspect of the present invention, when the elastic contact locking spring according to any one of the first to fourth aspects is elastically deformed by the protrusion, the pressing spring portion is pressed against the locking portion. Since the urging member for urging in the direction is provided, in addition to the effect according to any one of claims 1 to 4, when the single-ended fluorescent lamp is pushed in to elastically deform the spring portion by pushing up the protrusion portion, The rotation engaging portion of the elastic contact locking spring protrudes from the side surface of the protruding portion of the single base fluorescent lamp by being pushed inward by the biasing piece and pressed against the base of the single base fluorescent lamp. It is possible to securely engage the single-ended base fluorescent lamp and to further improve the reliability of retaining and retaining the single-base fluorescent lamp during rotation.

According to a sixth aspect of the present invention, the elastic contact locking spring according to any one of the first to fifth aspects is engaged with the locking part at the tip of the rotary engaging part so that the locking part is provided with a single mouthpiece. Since the temporary holding portion for temporarily holding the fluorescent lamp in the insertion direction is provided, in addition to the effect according to any one of claims 1 to 5, the elastic contact locking spring has a function of temporarily holding the single-ended fluorescent lamp. As a result, it is possible to prevent the single-ended fluorescent lamp from falling even when the single-ended fluorescent lamp is incompletely rotated.

According to a seventh aspect of the invention, the elastic contact locking spring according to any one of the first to sixth aspects is made of a conductive material.
The movable contact of the interlock switch is constituted by the elastic contact locking spring, and the contact of the interlock switch is turned on when the single base fluorescent lamp is completely mounted. In addition to the effects described,
Since the interlock switch is kept in the off state when the lamp pin and the lamp terminal are in incomplete contact, high voltage is not applied to the single-ended fluorescent lamp, and there is no fear of heat generation or ignition, and safety can be secured. .

According to the invention of claim 8, a window hole is formed in the outer shell of the socket facing the elastic contact locking spring according to any one of claims 1 to 7, and the insertion start state or the attached state of the single base fluorescent lamp is set. The elastic contact locking spring is faced to the window hole on one side, and the elastic contact locking spring is not faced to the window hole on the other side. Therefore, the effect according to any one of claims 1 to 7. In addition, following assembly, the angle of the elastic contact locking spring and the presence / absence of the elastic contact locking spring can be easily checked by visual inspection without reversing the socket. Can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an embodiment of the present invention.

FIG. 2 (a) is a plan view at the start of inserting the lamp, and FIG. 2 (b).
(C) is a sectional view taken along the line AA of (a), and shows a pushing state of the push-up spring portion by the protrusion.

FIG. 3A is a plan view of the lamp during rotation, and FIG. 3B is a sectional view taken along line BB of FIG.

FIG. 4A is a sectional view taken along the line A′-A ′ of FIG.
FIG. 3B is a sectional view taken along the line B′-B ′ of FIG.

FIG. 5A is a plan view of another embodiment of the present invention,
(B) (c) is a CC line sectional view of (a), and shows the pressing state of the pushing-up spring part by a protrusion part.

6 (a) is a plan view of the lamp shown in FIG. 5 when rotating,
(B) is a sectional view taken along line DD of (a).

FIG. 7 is an enlarged cross-sectional view of an R part in FIG.

FIG. 8 is an exploded partial cutaway perspective view of still another embodiment of the present invention.

9 (a) is a plan view of the lamp of FIG. 8 at the beginning of insertion,
(B) and (c) are EE line sectional views of (a), and show the pressing state of the push-up spring portion by the protrusion.

10 (a) is a plan view of the lamp shown in FIG. 9 when it is rotated,
(B) is the FF sectional view taken on the line of (a).

FIG. 11 is an exploded perspective view showing an example of still another embodiment of the present invention.

FIG. 12 is an exploded perspective view of the socket of FIG.

13 (a) and 13 (b) are a side view and a disassembled partially cutaway perspective view illustrating a positional relationship between a movable contact and a fixed contact.

14 (a) to 14 (c) are plan views illustrating a state of attaching / detaching a lamp and a state of a half rotation.

FIG. 15 is an explanatory diagram of a lamp circuit.

FIG. 16 is an exploded perspective view of still another embodiment of the present invention.

FIG. 17A is a perspective view illustrating a conventional socket cover, and FIGS. 17B and 17C are plan views illustrating the socket cover of the present embodiment.

18A is a perspective view of a conventional single-ended fluorescent lamp, FIG. 18B is an exploded perspective view of a plug receiver, and FIG. 18C is a perspective view of a socket body.

FIG. 19 is a side sectional view illustrating a connection state between the electric wire and the lamp pin of FIG. 18.

FIG. 20 is an exploded perspective view showing another conventional example.

FIG. 21 shows a rotating operation of the lamp shown in FIG.
(C) is a side view, (d)-(f) is sectional drawing.

22 is a perspective view showing an incompletely mounted state of the lamp of FIG. 20. FIG.

[Explanation of symbols]

 1 Single-base fluorescent lamp 3 Socket body 4 Socket cover 5 Base 5a Base bottom 6 Projection 7 Locking part 8 Lamp pin 9 Storage recess 10 Elastic contact locking spring 10a Bottom part 11 Push-up spring part 11a Base part 12 Pin insertion hole 13 Locking wall 14 Rotational engagement part 15 Annular rib 16 Drawing part 17 Locking step part 18 Energizing piece 19 Temporary holding part 21 Window hole 26 Lamp terminal

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomoyuki Ono 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (8)

[Claims] 1. A single-base fluorescent lamp socket in which the base of a single-base fluorescent lamp is inserted into a socket body and twisted to engage with the socket body in a substantially vertical direction from the bottom surface of the base of the single-base fluorescent lamp. In addition to projecting the projecting portion, a locking portion is projecting on the side surface of the projecting portion in a direction substantially orthogonal to the projecting direction of the projecting portion. Plural sets of lamp pins are projected in pairs so that the tips are located closer to the bottom side of the base than the tips of the protrusions, and a storage recess is provided in the center of the socket body into which the protrusions can be inserted. An elastic contact locking spring is rotatably arranged on the bottom surface side in the recess, and the elastic contact locking spring is cut and raised from the bottom surface side of the elastic contact locking spring to the opening side of the storage recessed portion of the single-ended fluorescent lamp. Push up to make elastic contact with the tip of the protrusion And a rotation engaging portion that engages with a locking portion that protrudes from the side surface of the protrusion in the rotation direction of the single-ended fluorescent lamp. A pin insertion hole into which each lamp pin can be inserted is provided, and a locking wall that engages with the locking portion to prevent the projection from coming off the housing recess is provided in the storage recess. A single-base fluorescent lamp socket, wherein the single-base fluorescent lamp can be mounted on the socket body by rotating the single-base fluorescent lamp in a state where the portion is inserted into the housing recess and the lamp pin is inserted into the pin insertion hole. 2. The elastic contact locking spring comprises a base piece part formed by cutting and raising a pair of push-up spring parts, and a pair of rotary engagements formed by bending from both side ends facing the base piece part in a substantially vertical direction. The single base fluorescent lamp socket according to claim 1, wherein the part is integrally formed. 3. The socket cover is provided with an annular rib which is in contact with a bottom surface of the elastic contact locking spring including a base piece of the push-up spring portion and is concentric with the center of rotation of the elastic contact locking spring. The single-base fluorescent lamp socket according to claim 1 or 2, characterized in that. 4. A locking step in which a throttle portion is formed on a bottom surface portion of the elastic contact locking spring along a direction substantially orthogonal to a tangential direction of the annular rib, and the throttle portion is locked to the annular rib of the socket cover. The single base fluorescent lamp socket according to claim 3, wherein a portion is provided. 5. The elastic contact locking spring is provided with a biasing piece that biases the pushing-up spring portion in the direction of pushing it against the locking portion when the pushing-up spring portion is elastically deformed by the protrusion. Item 1. A single-base fluorescent lamp socket according to any one of items 1 to 4. 6. A temporary holding portion for engaging with the locking portion and temporarily holding the locking portion in the insertion direction of the single-base fluorescent lamp is provided at the tip of the rotary engaging portion of the elastic contact locking spring. The single-base fluorescent lamp socket according to any one of claims 1 to 5, which is characterized. 7. The elastic contact locking spring is made of a conductive material,
The movable contact of the interlock switch is constituted by the elastic contact locking spring, and the contact point of the interlock switch is turned on when the mounting of the single base fluorescent lamp is completed. One-sided fluorescent lamp socket described. 8. A window hole is formed in the outer shell of the socket facing the elastic contact locking spring, and the elastic contact locking spring is made to face the window hole in either the insertion start state or the mounting state of the single-base fluorescent lamp. The single base fluorescent lamp socket according to any one of claims 1 to 7, wherein the elastic contact locking spring is not exposed to the window hole on the other side.