JP5390928B2 - socket - Google Patents

Description

  The present invention relates to a socket for a bi-post type light bulb used for lighting equipment such as a spotlight for effect lighting in a production space such as a theater stage or a television studio.

  As prior art document information related to the present invention, for example, there are the following Patent Document 1 and Patent Document 2.

Japanese Utility Model Publication No. 57-25482

Japanese Utility Model Publication No. 57-57080

  In Patent Documents 1 and 2, two contacts divided into two are close to each other in the parallel direction so that the cap of the bi-post light bulb inserted between the contacts is clamped and separated, and the cap is inserted and removed. The specific structure of the socket that can be used is described. According to the socket structures of Patent Documents 1 and 2, it is easy to insert and remove the cap of the bipost-type light bulb, and it is possible to securely hold the cap.

  By the way, when a bi-post type light bulb is mounted on a socket, it is necessary to prevent the occurrence of electric shock, arc discharge, or the like by de-energizing the socket. That is, if the socket is in an energized state, an electric shock will occur when the socket is inserted with the finger touching the base. Also, when the cap is inserted, the base contacts the contact in an unstable state, causing arc discharge, which may oxidize the base or the surface of the base or partially increase the insulation resistance and overheat. This shortens the life of the bipost bulb and socket.

  An object of the present invention is to deal with such a problem. In other words, even if the socket is in an energized state, it is an object of the present invention to prevent electric shock or arc discharge when the base is inserted.

  In order to achieve the above object, a socket according to the present invention comprises at least the following configuration.

  By the approach of a pair of insulators, the pair of insulators clamps the cap of the bipost-type light bulb, holds the inserted state of the cap, and the pair of insulators separates to release the clamping of the cap. In the socket in which the base can be inserted and removed, the socket is provided on one of the pair of insulators, and is provided on the other of the pair of insulators. And a contact that contacts the supported base only in a clamped state.

  The contact is arranged so as to be in contact with the base on the insertion end side of the support portion.

  The insulator provided with the support portion has a cover portion that overlaps with the insertion start end surface of the other insulator in the insertion direction of the base in the approach / separation state of the other insulator, and the cover portion includes the support portion and the support portion. An insertion hole that communicates is provided.

  The support portion supports the base in a contact state.

  The contact is provided with a discharge portion that makes contact with the base, and the discharge portion is arranged so as to first contact the supported base.

  The discharge part is arranged on the insertion end side of the support part.

  The discharge part is arranged so as to be in contact with the insertion end side of the base.

  The pair of insulators is made of aluminum oxide.

1 is a sectional view showing a schematic configuration showing an example of a socket according to the present invention, and shows a state in which a base can be inserted and removed. The same shows the state of holding and holding the base. (3)-(3) sectional view taken on the line of FIG. (4)-(4) sectional view taken on the line of FIG. (5)-(5) sectional view taken on the line of FIG. (6)-(6) sectional view taken on the line of FIG. (7)-(7) sectional view taken on the line of FIG. (8)-(8) sectional view taken on the line of FIG. (9)-(9) sectional view taken on the line of FIG. (10)-(10) sectional view taken on the line of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing a socket according to the present invention will be described with reference to the drawings.

  1-10 has shown schematic structure of the socket 1 of this embodiment. The socket 1 of the present embodiment includes a pair of insulators 2 and 3 and a holding mechanism 4 that moves the pair of insulators 2 and 3 closer to and away from each other and holds the approached state and the separated state.

  That is, in the separated state of the pair of insulators 2 and 3 (see FIGS. 1 and 3 to 7), the cap B of the bipost-type light bulb (hereinafter referred to as “light bulb”) A can be inserted and removed, and the insulators 2 and 3 are approached. In the state (FIGS. 8 to 10), the base B is inserted and held. The light bulb A is of a known form (for example, a halogen light bulb) in which two caps B having a cylindrical shape are projected.

  The socket 1 is provided with a contact 50 that contacts only the base B and energizes only the insulator 3, and the insulator 2 supports the inserted base B when the base B is inserted. 2A is provided. When the insulators 2 and 3 are separated from each other, the contact 50 is in a non-contact state (see FIG. 6) with respect to the base B supported by the support portion 2A. The contact 50 is in contact with B (see FIG. 9).

  That is, the socket 1 prevents arc discharge, electric shock, etc. at the time of insertion since the base B is not in contact with the contact 50 at the beginning when the base B is inserted in an energized state. be able to. When the insulators 2 and 3 are brought close to each other with the base B inserted, the contact 50 comes into contact with the base B, the electric bulb A is energized, and the base B can be held.

  Hereinafter, each component of the socket 1 of the present embodiment will be described. The insulators 2 and 3 of the present embodiment are molded into a predetermined shape using aluminum oxide (hereinafter referred to as “alumina”) which is an insulating material. .

  In the following, the insertion start end side of the socket 1 is referred to as the upper side, and the insertion end side is referred to as the lower side.

  The insulator 2 has a cubic shape integrally provided with a plate-shaped cover portion 21 extending in the direction of the insulator 3 facing the upper surface. An insertion hole 21 </ b> A for inserting the base B is opened in the cover portion 21. The support portion 2 </ b> A communicating with the insertion hole 21 </ b> A is connected to the lower end surface of the cover portion 21. Further, a fitting groove 22 into which a half of the peripheral surface of the base B to be inserted is fitted is formed to the lower end surface of the insulator 2 so as to be continuous with the insertion hole 21A.

  The fitting groove 22 is formed in a planar semicircular shape that matches the arc of the half of the circumferential surface of the base B so that the circumferential surface of the inserted base B comes into contact therewith.

  The support portion 2A is formed in an arch shape whose inner and outer peripheral surfaces are both planar semicircular, and a through hole 21B communicating with the insertion hole 21A is formed by the fitting groove 22. Further, the support portion 2A has such a length as to support the base B so that the upper half of the base B penetrates and the remaining lower half is exposed. Further, the inner peripheral surface 20A of the support portion 2A is formed in a planar semicircular shape so as to fit and contact the arc of the base B.

  The cover portion 21 always overlaps the upper surface 3A of the insulator 3 in the approached state and the separated state of the insulators 2 and 3, and hides the contact 50 provided on the insulator 3 from the upper surface.

  That is, the cover portion 21 and the insertion hole 21A provided in the cover portion restrict the base B from being inserted into the insulator 3 side when the base B is inserted, and reliably attach the support portion 2A to the support portion 2A. It can be guided to be inserted. Therefore, by this regulation and guidance, it is possible to prevent the occurrence of electric shock and arc discharge when the base B is inserted.

  Further, heat is generated in the base B supported by the support portion 2A when energized, but the heat is conducted to the insulator 2 by the fitting contact of the base B with the through hole 21B and the fitting groove 22. The heat is dissipated.

  Alumina, which is the material for insulators 2 and 3 in this embodiment, is excellent in heat conduction efficiency, and is considered preferable as an insulator for insulators used in sockets that generate heat when energized as in the present invention. However, the insulator material used in the present invention is not limited to the exemplified alumina, and various ceramics such as steatite may be used.

  The insulator 3 has a cubic shape, and is arranged so that the upper surface 3 </ b> A is opposed to and overlaps the lower surface 21 </ b> C of the cover portion 21. On the surface of the insulator 3 facing the fitting groove 22, a fitting groove 31 into which the support portion 2 </ b> A fits in a fitting manner, and a contact support groove 32 continuously provided in the downward direction of the fitting groove 31. Is formed.

  The fitting groove 31 has a semicircular shape that is the same length as the supporting portion 2A and matches the semicircular shape of the outer periphery, and when the insulators 2 and 3 are close to each other, the supporting portion 2A is placed in the fitting groove 31. Are fitted (see FIG. 8), and the support portion 2A escapes from the fitting groove 31 when separated (see FIG. 5).

  The contact support groove 32 is a groove for supporting the contact 50, and includes a first groove portion 32 </ b> A provided in a downward direction with respect to the fitting groove 31 and a downward direction with respect to the first groove portion 32 </ b> A. It is comprised with the 2nd groove part 32B which was not provided.

  The holding mechanism 4 exemplified in the present embodiment has a well-known structure that moves the insulators 2 and 3 closer to and away from each other by the action of the cam mechanism and holds the approached state and the separated state. A schematic configuration of the mechanism 4 will be described. The configuration of the holding mechanism is not limited to the illustrated embodiment, and any configuration may be used as long as the insulators are moved closer to and away from each other and the approached state and the separated state are held.

  One end of the holding mechanism 4 is fixed to the insulator 2 side of the socket case 10 that holds the sides of the insulators 2 and 3, and the cam shaft 40 penetrates the insulators 2 and 3 in the opposite direction. An operation lever 41 pivotally supported by the end of the camshaft 40 projecting toward the insulator 3 so as to be pivotable in the vertical direction, and slidable on the camshaft 40 so as to come into contact with the shaft support portion 41A of the operation lever 41. The loosely-fitted collar 42 passes through the socket case 10, and is in contact with the collar 42 and insulator 3 between the collar 42 and insulator 3, and is slidable with respect to the camshaft 40. A holding spring 43 that is loosely fitted and a compression spring 44 that is mounted between the insulators 2 and 3 are provided.

  According to the holding mechanism 4, as shown in FIGS. 1 and 2, the operation lever 41 rotates so that the longitudinal direction is switched between the horizontal direction and the vertical direction. 3 is held apart (a state where the base B can be inserted / removed, see FIGS. 1 and 5 to 7), and the approaching state of the insulators 2 and 3 (a state where the base B is held, FIG. 2 and FIG. 8 to FIG. 10).

  In the separated state of insulators 2 and 3 shown in FIGS. 1 and 5 to 7, the separating state of insulator 3 with respect to insulator 2 is maintained by the urging force of compression spring 44, and the urging force is held by insulator 3 and pressing spring. 43, by pressing the end surface 410 of the shaft support part 41A facing the longitudinal direction of the operation lever 41 through the collar 42, the horizontal state of the operation lever 41 is maintained.

  When the longitudinal direction of the operation lever 41 is rotated from the horizontal state to the vertical direction, the collar 42 is pressed in the direction of the insulator 3 by the corner portion 411 of the shaft support portion 41A. The pressing force moves the insulator 3 in a direction approaching the insulator 2 against the compressive force of the compression spring 44 through the pressing spring 43. As shown in FIGS. 2 and 8 to 10, when the longitudinal direction of the operation lever 41 becomes vertical, the end surface 412 of the shaft support portion 41 </ b> A along the longitudinal direction of the continuous operation lever 41 is By preventing the insulator 3 from moving in the separating direction by the urging force, the approaching state of the insulators 2 and 3 is maintained.

  The end surface 410 is set to a position where the insulators 2 and 3 are separated in the horizontal state of the operation lever 41 in the longitudinal direction, and the end surface 412 is insulators 2 and 3 in the vertical state of the operation lever 41 in the longitudinal direction. Is set to a position to hold in an approaching state.

  Note that the operation lever 41 is not limited to the configuration in which the illustrated insulators 2 and 3 are simply moved toward and away from each other, and for example, as described in Japanese Utility Model Publication No. 63-17182, the operation lever 41 may be configured to also serve as a mirror mounting frame. Good.

  The contact 50 is formed in a planar angle shape at a portion that contacts the base B and is energized only when the insulators 2 and 3 are in an approaching state, and the fitting groove 22 and the fitting groove 22 in the plan view are formed in the first groove portion 32A. While fitting so as to face each other, it is attached to the first groove portion 32A so as to move laterally within the tolerance of the base B by riveting or the like (see FIGS. 6 and 9). In addition, the contact 50 is supported by the support portion 2A on two contact surfaces 50A having a vertex of a plane angle (a portion corresponding to the bottom of the contact 50) as a boundary in the approaching state of the insulators 2 and 3. The side surface of the base B is in contact (see FIG. 9). That is, in the approaching state of the insulators 2 and 3, the contact surface 50A of the fitting groove 22 and the contact 50 is in contact with the peripheral surface of the base B supported.

  On the lower side of the contact 50, a connecting portion 5 for connecting the cable 5A and a discharging portion 6 that discharges when the base B comes into contact are fixed by riveting or the like (not shown) so as to be integrally overlapped. .

  The connecting portion 5 is a thin plate having a cable 5A connected to the lower end thereof by caulking, and is fitted and held in the second groove portion 32B.

  The discharge part 6 includes a contact discharge part 61 with which the lower peripheral surface of the base B contacts.

  The contact 50 and the connection portion 5 are also brought into contact with the contact support groove 32 of the insulator 3, and heat generated by energization is conducted to the insulator 3 by this contact to dissipate heat.

  The contact discharge portion 61 is formed in the shape of two leaf springs extending from the left and right ends of the connection plate 60 so that the lower peripheral surface of the base B protruding from the lower end of the contact 50 comes into contact. Has been. The contact discharge part 61 sets the position of the contact surface 61A with which the base B contacts to a position closer to the insulator 2 than the contact surface 50A of the contact 50, and when the insulators 2 and 3 approach, After the lower peripheral surface of the base B comes into contact with the contact surface 61A, the peripheral surface of the base B excluding the lower peripheral surface comes into contact with the contact 50 (see FIGS. 9 and 10).

  That is, if the socket 1 is energized and the insulators 2 and 3 are brought close to each other, the lower peripheral surface, which is a part of the supported base B, contacts only the contact discharge portion 61, and arc discharge occurs at the contact portion. As a result, adverse effects due to arc discharge on most of the contacts 50, the connection portion 5 and the like, and most of the bottom surface of the base B can be suppressed.

  The contact discharger 61 is elastically deformed in the direction of the insulator 3 when the peripheral surface of the lower end of the base B comes into contact with the insulators 2 and 3 and generates a biasing force in a direction to return from the deformation. This biasing force ensures the contact reliability with respect to the lower peripheral surface of the base B (see FIG. 10).

  According to the socket 1 of the present embodiment, when the base B is inserted in the separated state of the insulators 2 and 3, the support part 2A supports the base B, whereby the socket 1 in which the insulators 2 and 3 are in the separated state. The insertion state of the light bulb A can be stabilized. In the separated state of the insulators 2 and 3, since the non-contact state between the base B and the contact 50 is maintained, if the base B is inserted when the socket 1 is energized, an electric shock or arc The occurrence of discharge can be prevented.

  Further, when the insulators 2 and 3 are close to each other in the energized state, an adverse effect on the base B and the contact 50 is suppressed by generating an arc discharge between the lower peripheral surface of the base B that contacts first and the contact discharge part 61 in the discharge part 6. The restriction of the contact of the base B with the contact 50 when the base B is inserted and the prevention of electric shock and arc discharge by reliable guidance to the support portion 2A, and the heat dissipation effect by forming the insulators 2 and 3 with alumina. Many effects can be expected, such as improvement and reduction of the number of parts by arranging the contact 50 only on the insulator 3 side.

  In addition, this invention is not limited to illustrated embodiment, Implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible. For example, the present invention can be implemented in various forms such as the structure of the holding mechanism, the shape of the operation lever in the holding mechanism, the shape of the insulator, and the shape of the contact.

1: socket 2: insulator 3: insulator 50: contact 6: discharge part 2A: support part 21: cover part 21A: insertion hole A: bipost type light bulb B: base

Claims (6)

When the pair of insulators approaches, the pair of insulators clamps the cap of the bipost-type light bulb, holds the inserted state of the cap, and the pair of insulators separates to release the clamping of the cap. Then, in the socket in which the base can be inserted and removed,
A support portion that is provided on one of the pair of insulators and supports the base in the inserted state;
A contact provided on the other of the pair of insulators and arranged to contact the base supported by the support portion only in a clamped state and to contact the base at the insertion end side of the support portion. When,
The insulator provided with the support portion has a cover portion that overlaps with the insertion start end surface of the other insulator in the insertion direction of the base in the approach / separation state of the other insulator, and the cover portion is connected to the support portion. A socket characterized by having an insertion hole for communication . The socket according to claim 1 , wherein the support portion supports the base in a contact state. Comprising a discharge portion which mouthpiece is in contact with said contact, said discharge portion, the socket according to claim 1 or claim 2, characterized in that it is arranged such that first contact with the mouthpiece. The socket according to claim 3 , wherein the discharge part is disposed on the insertion end side of the support part. The discharge unit, the socket according to claim 3 or claim 4, characterized in that it is placed in contact with the inserted narrowing end side of the ferrule. The pair of insulators is socket according to any one claims 1 to 5, characterized in that it consists of alumina.

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