JP5212645B2 - Lamp socket - Google Patents

Description

  The present invention relates to a lamp socket capable of confirming a tightening contact of a lamp by sound.

  As a conventional lamp socket of this type, when the lamp base is rotationally engaged with a socket body that holds a lamp base of a lamp that is detachably mounted, and the lamp base is mounted in a normal state on the socket body. A device that emits an impact sound due to engagement to notify the completion of lamp tightening is known (see Patent Document 1).

  However, the lamp socket shown in Patent Document 1 is a lamp socket for a single-cap fluorescent lamp having a pin terminal type base having a plurality of pin terminals, and is a screw-in type such as an incandescent lamp or a bulb-type fluorescent lamp. It does not correspond to a single base lamp having a base (referred to as an E-type base). Therefore, a normal screw-in socket (referred to as an E-base socket) having a fixed contact and a base that come into contact with the front end portion and outer peripheral surface of the lamp base, respectively, is attached to the lamp of the screw-type base before being energized. It was not possible to confirm whether the lamp was securely tightened, and incandescent lamps and bulb-type fluorescent lamps were sometimes incompletely mounted.

JP-A-9-185978

  The present invention solves the above-described problem, and provides a lamp socket that can confirm the completion of tightening of a lamp having a screw-type base by sound, and can securely attach the lamp to the socket body. The purpose is to do.

  In order to achieve the above object, the invention according to claim 1 is directed to a socket body, a base that is engaged by inserting and rotating a lamp base through an opening of the socket body, and the lamp base is related to the base. And a contact plate spring member that contacts the tip terminal of the lamp base, and a contact leaf spring member that contacts the tip terminal of the lamp base. A fixed contact member that is in contact with the member, and the contact leaf spring member includes a fulcrum portion that is fixed to the socket body, a movable piece portion that is rotated by pressing the tip terminal of the lamp base, and the movable piece. A biasing piece disposed in a curved state between the front end of the socket and the socket body side and providing a biasing force for causing a snap action operation when the movable piece rotates. One part is front When the movable piece is not pressed by the tip terminal of the lamp base, the movable piece is urged toward the socket opening side, and the movable piece is rotated by being pressed by the tip terminal of the lamp base. Accordingly, when the posture of the biasing piece changes and exceeds the dead point, the movable piece is biased toward the fixed contact member by a snap action operation, and the movable piece is directed toward the fixed contact member by this biasing force. To rotate and collide.

  According to a second aspect of the present invention, in the lamp socket according to the first aspect, the urging piece portion of the contact leaf spring member is bifurcated from the distal end portion of the movable piece portion in the fulcrum portion direction. When the movable piece is urged toward the opening side of the socket body, the end is extended and locked to the socket body. When the movable piece portion is urged toward the fixed contact member after the snap action operation, it is curved convexly toward the opening side of the socket body.

  According to the first aspect of the present invention, when the lamp cap is rotationally engaged with the base, the urging piece of the contact leaf spring member performs a snap action operation, and the movable piece collides with the fixed contact member. The contact sound due to the impact can be generated. For this reason, it is possible to confirm the complete completion of the fastening of the lamp cap in the screw-in type lamp.

  According to the invention of claim 2, the urging force of the snap action operation by the urging piece portion of the contact leaf spring member can be increased, so that the contact sound between the movable piece portion and the fixed contact member can be increased, and the lamp It becomes easier to detect the completion of the fastening of the base.

The perspective view of the lamp socket which concerns on one Embodiment of this invention. Sectional drawing of the lamp socket. The top view seen from the opening side of the lamp socket. The perspective view of the contact leaf | plate spring member of the lamp socket. Sectional drawing in the insertion state of the lamp | ramp to the lamp socket. The figure which shows the state of the contact initial stage of the lamp front-end | tip terminal and contact leaf | plate spring member in the lamp socket. The figure which shows the state in the middle of the rotation of the said contact leaf | plate spring member. The figure which shows the state after rotation of the said contact leaf | plate spring member.

  Hereinafter, a lamp socket according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the lamp socket 1 is one in which a lamp base 21 of a screw-in type lamp 20 is mounted by tightening.

  As shown in FIGS. 2 to 5, the lamp socket 1 is provided in a socket body 2 as a cylindrical casing made of an insulating material having an opening 3 into which a lamp cap 21 is inserted, and the socket body 2. , A receiving base 4 to which the lamp base 21 is rotationally engaged, a contact leaf spring member 5 that constitutes a contact point, and a fixed contact member 6 that comes into contact with the contact leaf spring member 5.

  As shown in FIG. 4, the contact leaf spring member 5 has a T-shape that is rotated by pressing the fulcrum 51 fixed to the fixing base 7 provided in the socket body 2 and the tip terminal 22 of the lamp base 21. A movable piece 52 having a shape and a biasing piece 54 which is bifurcated from the tip 53 and formed in a U shape. Here, the length of the urging piece 54 is shorter than the length of the movable piece 52. The urging piece 54 is curved and arranged in an arc shape when mounted on the socket body 2.

  The movable piece 52 has a movable contact (contact) A in the vicinity of a substantially central portion between the fulcrum 51 and the tip 53, a movable contact (contact) B on the back side of the tip 53 facing the fixed contact member 6, Have each. The movable contact A is pressed in contact with the tip terminal 22 of the lamp base 21. The movable contact B is brought into contact with the fixed contact member 6 when the movable piece 52 is pressed and rotated by the tip terminal 22.

  The urging piece portion 54 has two spring pieces branched in a bifurcated shape and extends in the direction of the fulcrum portion 51, and its end portion 55 is supported and fixed to the fixed base 7 of the socket body 2. An arcuate shape is formed between the tip 53 and the fixed base 7 side. In the curved state, the urging piece portion 54 is compressed and deformed, and an elastic urging force due to the compression deformation is accumulated, and the movable piece portion 52 is attached by the accumulated urging force. Rush.

  At this time, the direction in which the movable piece 52 is biased changes depending on the direction of the arc of the biasing piece 54. For example, in a state where there is no external pressure from the lamp base 21, the urging piece 54 is curved in a convex shape on the side opposite to the opening 3 side of the socket body 2, and the movable piece 52 is connected to the socket body 2. The movable piece 52 is urged toward the opening 3 side, and is pushed up with an inclination that increases in the direction of the opening 3 from the fulcrum 51 toward the tip 53. Moreover, when this curve is reversed and is curving convexly toward the opening 3 side of the socket body 2, the movable piece portion 52 is biased toward the fixed contact member 6 side.

  The reversal of the urging direction by the urging piece portion 54 is such that the urging piece portion 54 is deformed when the pressure from the tip terminal 22 of the lamp base 21 is applied to the movable piece portion 52 as an external pressure and its posture changes greatly. Then, it is performed by a snap action operation that instantaneously changes the energizing direction.

  The fixed contact member 6 forms an electrode terminal that supplies power to the lamp 20 together with the receiving metal 4. The fixed contact member 6 is formed of a spring member fixed to the bottom of the socket body 2, one end side is fixed to the inner bottom surface of the socket body 2, and the other end side is lifted from the inner bottom surface to come into contact with the movable piece portion 52. It is a fixed contact (contact) C. The height of the fixed contact C of the fixed contact member 6 is set higher than the height from the inner bottom surface of the movable contact B in the movable piece 52 that is rotated downward during the snap action operation of the biasing piece 54. ing.

  The fixing base 7 is erected in a U-shape in plan view on the inner bottom surface of the socket body 2, and the fulcrum part 51 of the contact leaf spring member 5 is fixed by screwing or the like, and the end part of the biasing piece part 54 A locking groove for supporting and fixing 55 is provided.

  In the lamp socket 1 configured as described above, the operation of the contact leaf spring member 5 due to the pressing of the tip terminal 22 of the lamp cap 21 will be described with reference to FIGS. FIG. 5 shows a state in which the lamp 20 is inserted into the socket body 2, and FIGS. 6 to 8 show the contact leaf spring member 5 that is pressed by the tip terminal 22 of the lamp base 21 when the lamp base 21 is tightened. The rotation change of is shown.

  As shown in FIG. 5, when the tip terminal 22 of the lamp base 21 does not press the contact leaf spring member 5, the movable piece portion 52 of the contact leaf spring member 5 is opened by the biasing piece portion 54. It is biased to the 3rd side.

  When the lamp base 21 of the lamp 20 is rotated and tightened into the socket body 2 from this state, the tip terminal 22 of the lamp base 21 contacts the movable contact A of the movable piece 52 as shown in FIG. Start pressing.

  Subsequently, when the lamp base 21 is tightened into the socket body 2, the movable piece 52 is pressed by the tip terminal 22 of the lamp base 21 and is opposite to the opening 3 side of the socket body 2 as shown in FIG. 7. As the side is rotated, the fixed contact member 6 is brought closer. At this time, since the end portion 55 of the urging piece portion 54 is supported and fixed, the urging piece portion 54 receives a pressure that compresses and deforms the concave arc by the rotation of the movable piece portion 52. Since the biasing force to the side is strong, the arc shape does not change.

  Further, when the lamp base 21 is deeply tightened into the socket body 2, as shown in FIG. 8, the movable piece 52 is pressed more strongly by the tip terminal 22 of the lamp base 21, so that the movable piece 52 is The biasing piece 54 is further deformed and compressed by this rotation. Thus, when the balance between the tension spring force of the movable piece portion 52 and the compression spring force of the biasing piece portion 54 cannot be maintained, the biasing piece portion 54 cannot continue to maintain the same posture. Beyond the dead point, a snap action operation occurs in which the arcuate posture changes from a concave shape to a convex shape at a stroke with respect to the opening 3 of the socket body 2.

  In this snap action operation, the movable piece portion 52 is more sufficiently connected to the distal end terminal 22 of the lamp base 21 so that the movable piece portion 52 is not separated from the distal end terminal 22 of the lamp base 21 even after the operation. Operates when pushed in.

  By this snap action operation, the urging direction of the urging piece portion 54 toward the movable piece portion 52 is instantaneously reversed from the opening 3 side of the socket body 2 to the fixed contact member 6 side, and the urging force causes the movable piece portion 52 to move. The movable contact B of the movable piece 52 collides with the fixed contact C of the fixed contact member 6 by being rotated toward the fixed contact member 6 opposite to the opening 3 side. At this time, a contact sound is generated by the impact of the contact. The impact strength of these contacts is designed such that the contact sound is at a level that is perceived by the operator.

  As described above, according to the lamp socket 1 of the present embodiment, the movable piece 52 is fixed to the fixed contact member 6 by the snap action operation of the urging piece 54 by pressing from the tip terminal 22 of the screw-type lamp base 21. It can collide and make contact at a stretch. As a result, the tip terminal 22 of the lamp base 21 and the fixed contact member 6 become a closed circuit so that the lamp can be turned on, and at the same time, the operator completes the tightening of the lamp base 21 by the contact sound generated by the impact. Can be confirmed. That is, it is possible to confirm the completion of tightening of a lamp having a screw-in base similar to that of an incandescent lamp or a bulb-type fluorescent lamp by sound, and it is possible to confirm the reliable mounting of the lamp in the socket.

  Further, since the urging piece portion 54 is formed by two spring pieces that are bifurcated, the urging force of the snap action operation by the urging piece portion 54 of the contact leaf spring member 5 can be increased. The contact sound between the force piece portion 54 and the fixed contact member 6 can be increased, and it becomes easy to sense the completion of the fastening of the lamp cap 21.

  Further, the configuration on the lamp 20 side such as the lamp base 21 is not required, and only the socket body 2 side may be changed, such as the addition of the contact leaf spring member 5, so that it can be applied to almost all screw-type lamps. Can be highly versatile.

  Moreover, in the said embodiment, although the movable piece part 52 of the contact leaf | plate spring member 5 was made into the substantially straight line from the fulcrum part 51 to the front-end | tip part 53, the range which does not raise | generate the snap action operation | movement by the pressing of the lamp cap 21 for the movable piece part 52 Is bent convexly toward the opening 3, the vicinity of the apex of the central portion is set as a movable contact A with the tip terminal 22, and the movable contact B of the tip 53 of the movable piece 52 is brought close to the fixed contact member 6 in advance. Thus, the contact leaf spring member 5 can be brought into contact with the fixed contact member 6 quickly during the snap action operation of the urging piece 54. The spring strength of the movable piece 52 and the urging piece 54 can be changed depending on the width and thickness of the spring plate.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, in the above-described embodiment, the urging piece portion 54 is configured by two springs, but may be one or three or more. Further, the shapes of the movable piece 52 and the urging piece 54 in the contact leaf spring member 5 may be other than T-shape or U-shape, and the movable piece 52 and the urging piece 54 are made of different elastic members. It may be configured.

DESCRIPTION OF SYMBOLS 1 Lamp socket 2 Socket main body 3 Socket opening 4 Receptacle 5 Contact leaf | plate spring member 51 Supporting point part 52 Movable piece part 53 Tip part 54 Energizing piece part 6 Fixed contact member 20 Lamp 21 Lamp cap 22 Tip terminal A, B Movable contact ( contact)
C Fixed contact (contact)

Claims (2)

A socket body, a receiver that is engaged when the lamp base is inserted through the opening of the socket body and rotated, and a tip terminal of the lamp base is pressed when the lamp base is engaged with the receiver. A lamp socket with contact points,
The contact includes a contact leaf spring member that is in contact with the tip terminal of the lamp base, and a fixed contact member that is in contact with the contact leaf spring member.
The contact leaf spring member includes a fulcrum portion fixed to the socket body, a movable piece portion rotated by pressing of a tip terminal of the lamp cap, and a gap between the distal end portion of the movable piece portion and the socket body side. A biasing piece that is arranged in a curved state and applies a biasing force for causing a snap action operation when the movable piece rotates.
The biasing piece portion biases the movable piece portion toward the socket opening side when the movable piece portion is not pressed by the tip terminal of the lamp base, and the movable piece portion is pushed by the tip terminal of the lamp base. When the posture of the urging piece changes as it is pressed and rotated and the dead point is exceeded, the movable piece is urged toward the fixed contact member by a snap action operation, and is movable by this urging force. A lamp socket characterized in that one part is rotated toward a fixed contact member to cause collision.   The biasing piece portion of the contact leaf spring member is bifurcated from the distal end portion of the movable piece portion, extends in the direction of the fulcrum portion, and its end portion is locked to the socket body, and the movable piece portion is movable. When the one part is biased toward the opening side of the socket body, it is curved in a convex shape on the side opposite to the opening side of the socket body, and after the snap action operation, the movable piece part is moved toward the fixed contact member side. 2. The lamp socket according to claim 1, wherein, when energized, the lamp socket is curved convexly toward the opening side of the socket body.

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