JP2009026555A - Socket for cold-cathode tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a socket for a cold cathode tube facilitating installation of the cold cathode tube and preventing disconnection of the installed cold cathode tube. <P>SOLUTION: The socket for a cold cathode tube for electrically connecting a cold cathode tube to a wiring substrate includes a frame-shaped socket body having front, rear, left, right, and bottom walls with its top opened; a cover member of a rectangular cylinder shape having front, rear, left, and right walls with its top and bottom opened and capable of moving up and down between first and second positions in the socket body; and a contact unit fixed to the bottom wall of the socket body and equipped with at least two contact pieces disposed right and left and capable of elastically moving right and left although they are closed (viewed from the front side) when no load is applied; wherein a cam is provided on the front and/or rear walls of the cover member to open and close the two contact pieces according to the movement of the cover member between the first and second positions. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cold cathode that sandwiches dimet wires as external electrodes formed at both ends of a cold cathode tube used for a backlight of a liquid crystal panel and electrically connects the cold cathode tube and a wiring board. It relates to a socket for tubes.

  A cold cathode fluorescent lamp (CCFL) used for a backlight of a liquid crystal panel or the like is provided with jimet wires as pin-like terminal electrodes protruding from the inside of the glass tube at both ends thereof. The cold cathode tube is electrically connected to an external contact of a wiring board on which a printed circuit is formed via the dimet wire. In recent years, a socket or connector of a type that is sandwiched between a pair of contacts as shown in Patent Documents 1 and 2 in order to facilitate electrical connection between a cold cathode tube and a wiring board via a zimet wire. Has been developed.

JP 2005-259370 A JP 2006-244749

  In the connector disclosed in Patent Document 1, it is necessary to rotate the actuator clockwise and counterclockwise in order to open and close the pair of contacts that sandwich the jimet wire that is the terminal electrode of the cold cathode tube. Therefore, a space that allows rotation of the actuator is required. Further, if the pair of contacts are normally closed, when the cold cathode tube is mounted on the connector, a process of opening the closed contact is necessary, and automation when the cold cathode tube is mounted is difficult. Conversely, if the contact is previously opened by the actuator, a load is applied to the contact. Therefore, if the connector is attached to the wiring board by reflow soldering with the contacts open in this manner, the contacts may be thermally deformed by being exposed to high temperatures during reflow soldering. As a result, the contact and the jimet wire cannot be brought into contact with each other with a predetermined contact pressure, and the electrical contact between them becomes unstable.

  In addition, the connector disclosed in Patent Document 2 requires accuracy in order to obtain a predetermined contact pressure between the contact and the jimet wire, and is difficult to manufacture. Further, the cold cathode tube attached to the connector has a structure that can be pulled upward, which is not preferable. Furthermore, the contact is difficult to follow the expansion and contraction due to the heat in the longitudinal direction of the dimmet wire of the cold-cathode tube.

  In view of the above problems, an object of the present invention is to provide a cold cathode tube socket capable of preventing deformation of a contact due to reflow soldering even if the contact is a normally closed type. Another object of the present invention is to provide a cold-cathode tube socket that is easy to mount a cold-cathode tube and can prevent the mounted cold-cathode tube from coming off. Still another object of the present invention is to provide a cold cathode tube socket capable of ensuring the electrical contact between the contact and the dimmet wire of the cold cathode tube and improving the reliability of the electrical contact. In addition, another object of the present invention is to provide a cold cathode tube socket capable of stable electrical connection when a cold cathode tube is used, even if the dimmet wire of the cold cathode tube is thermally expanded.

  In order to achieve the above object, a cold cathode tube socket for electrically connecting a cold cathode tube having a dimethyl wire according to the present invention to a wiring board has a peripheral wall and a bottom wall, and the upper part is open. A casing-shaped socket body and a cylindrical body that has a peripheral wall and is open at the top and bottom, and is movable between an upper first position and a lower second position within the socket body. A cover member, and a contact fixed to the bottom wall of the socket body, disposed on the left and right, closed in a no-load state when viewed from the front, and having at least two contact pieces elastically deformable in the left-right direction, A cam body that opens and closes the two contact pieces as the cover member moves between the first position and the second position is provided in front and / or rear of the peripheral wall of the cover member. It is characterized by That.

  In the cold cathode tube socket according to the present invention, a mounting recess in which one end of the cold cathode tube is mounted is further formed in front of the peripheral wall of the cover member, and the front of the peripheral wall of the cover member. It is preferable that a guide groove for guiding the jimet wire is formed on the rear side.

  Furthermore, the cam body provided in the cover member of the cold cathode tube socket according to the present invention includes at least a first inclined surface that forms a cam surface, and a second parallel to the left and right vertical surfaces of the guide groove provided in the cover member. Preferably, it has one vertical plane and a second inclined plane and is formed in a trapezoidal cross section.

  Further, the contact of the cold cathode tube socket according to the present invention includes one left contact piece and two right contact pieces, and the left contact piece and the right contact piece are arranged symmetrically when viewed from the front, The contact pieces are alternately arranged in the front-rear direction so as to be sandwiched between the two right contact pieces, and each contact piece comes into contact with the elastically deformable portion, the bent portion, and the jimet wire that can be elastically deformed left and right. A contact portion, a curved portion that inverts the contact piece, and a drive piece that opens and closes two closed contact pieces that move to the left and right along the cam surface of the cam body as the cover member moves. It is preferable.

  Further, the drive piece of each of the contact pieces arranged on the left and right sides constituting the contact of the cold cathode tube socket according to the present invention has a lower end of the cam body of the cover member when the cover member is in the first position. When the cover member is in the second position, the cover member is preferably configured to be positioned on the left and right of the upper end of the cam body of the cover member.

  The contact of the cold-cathode tube socket according to the present invention further includes a terminal support member that supports a terminal connected to the wiring board, and the terminal support member has a contact fixing for fixing the contact to the socket body. It is preferable that a member is formed and the left and right contact pieces are swingably connected to the socket body in the front-rear direction.

  The peripheral wall of the cover member of the cold cathode tube socket according to the present invention is configured by a front wall, a rear wall, and left and right side walls, and the cover member is preferably a rectangular housing as viewed from above. Moreover, it is preferable that the surrounding wall of the said socket main body is comprised from the front wall, the rear wall, and the right and left side wall, and the said socket main body is a rectangular-shaped square cylinder body seen from the top.

  Since the cold-cathode tube socket of the present invention is configured to be closed in a no-load state, when the cold-cathode tube socket is attached to the wiring board by reflow soldering, contact deformation can be prevented.

  In addition, as the cover member moves in the vertical direction between the first position and the second position, the cam member provided on the cover member opens and closes the closed contact, and the cover member Since there is a mounting recess for mounting the cold cathode tube and a guide groove for guiding the dimmet wire of the cold cathode tube, the cold cathode tube can be easily attached to or removed from the socket for the cold cathode tube. be able to. In addition, no external force acts on the cold cathode tube and the dimet wire when the cold cathode tube is attached and detached, and therefore, the cold cathode tube and the jimet wire are not damaged.

  Furthermore, since the contact does not apply a force to the cam body provided in the cover member when the cover member is in the first and second positions, the contact member may be fatigued or deformed. Absent.

  In addition, since at least two, preferably three contact pieces constituting the contacts are provided, there are a plurality of contact points between the cold cathode fluorescent lamps and the contacts, which improves contact reliability and is reliable and stable. Electrical connection is obtained.

  Further, since the contact piece is configured to be supported so as to be swingable in the front-rear direction, the thermal expansion of the jimet wire can be absorbed, and the jimet wire is not damaged.

  Hereinafter, embodiments of the cold cathode tube socket according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a perspective view of an embodiment according to the cold cathode tube socket of the present invention, FIG. 2 is a top view of the cold cathode tube socket shown in FIG. 1, and FIG. 3 is a cold view shown in FIG. FIG. 4 is a front view of the cathode tube socket, and FIG. 4 is a side view of the cold cathode tube socket shown in FIG. FIG. 5 is a cross-sectional view taken along the line VV of the cold cathode tube socket shown in FIG. 2 or 3. 6 is a perspective view of a cover member constituting the cold cathode tube socket shown in FIG. 1, and FIG. 7 is a cross-sectional view taken along line VII-VII of the cover member of FIG. 8 is a perspective view of a socket main body constituting the cold cathode tube socket shown in FIG. 1, and FIG. 9 is a cross-sectional view taken along line IX-IX of the socket main body of FIG. FIG. 10 is a perspective view showing a state in which the cold cathode tube shown in FIG. 1 is placed in the placement recess of the cold cathode tube socket. 11 is a side view showing a state in which the cover member is pushed down from the state of FIG. 7 and the cold cathode tube is completely attached to the socket, and FIG. 12 is a perspective view of the socket in the state of FIG. is there. FIG. 13 is a diagram for explaining an operation of mounting the cold cathode tube in the cold cathode tube socket of FIG. 1, and FIG. 13 (a) shows the cold cathode tube shown in FIG. It is sectional drawing which follows the VIII-VIII line of FIG. 1 which shows the state mounted in the mounting recessed part of a socket, (b) is the VIII of FIG. 1 which shows the state by which the cover member was pushed down and the contact was opened. It is sectional drawing which follows a -VIII line, (c) is a cross section which follows the VIII-VIII line of FIG. 1 which shows the state by which the cover member was pushed down similarly to FIG. 11, and the cold cathode tube was completely attached to the socket. FIG. 14 is an enlarged perspective view of a main part of the contact of the cold cathode tube socket shown in FIG. 1, FIG. 14A is a perspective view showing a state in which the contact is closed, and FIG. It is a perspective view which shows the state in which the line is clamped. FIG. 15 is an enlarged top view of the main part of the contact shown in FIG. 14, (a) is a top view showing a free state in which the contact is closed, and (b) is a diagram in which a jimet wire is sandwiched between the contacts. It is a top view which shows the state performed. FIG. 16 is a perspective view showing the entire contact of the cold cathode tube socket shown in FIG. 1, (a) is a perspective view showing a free state in which the contact is closed, and (b) is a view showing the contact. It is a perspective view which shows the state opened. 17A and 17B show another embodiment of the contact, wherein FIG. 17A is a perspective view showing a free state in which the contact is closed, and FIG. 17B is a perspective view showing a state in which the contact is opened. is there. FIG. 18 is an enlarged side view of a main part showing countermeasures against thermal expansion of the cold cathode tube mounted on the cold cathode tube socket shown in FIG.

In this specification, the terms “front” and “rear” respectively indicate the + x direction and the −x direction in FIG. 1, and the terms “left” and “right” respectively indicate the + y direction in FIG. And the terms “upper” and “lower” refer to the + z direction and the −z direction in FIG. 1, respectively. O ₁ -O ₁ is the center line of the cold cathode tube socket according to the present invention parallel to the x-axis, and O ₂ -O ₂ is the center line parallel to the z-axis. Unless otherwise specified, “width” refers to the length in the left-right direction, “height” refers to the length in the up-down direction, and “depth” refers to the length in the front-rear direction.

  The cold cathode tube socket 1 according to the present invention is disposed on the wiring board 100 so as to support both ends of the cold cathode tube 90 (see FIG. 11). That is, two cold cathode tube sockets 1 are originally required for one cold cathode tube 90. However, in order to simplify the description, only one end of the cold cathode tube socket 1 according to the present invention and one end portion of the cold cathode tube 90 attached to the socket 1 are illustrated and described herein.

  As shown in FIGS. 1 to 5, a cold cathode tube socket 1 (hereinafter simply referred to as “socket 1”) according to the present invention generally includes a cover member 10, a socket body 30, and contacts 50. .

The cover member 10 extends from a first upper position where the cold cathode tube 90 is not mounted (see FIGS. 1 and 4) to a lower second position where the cold cathode tube 90 is mounted (see FIGS. 11 and 12). It is formed so as to be movable in the vertical direction in a socket body 30 to be described later. The cover member 10 is also configured to be able to open and close the contacts 50 by moving in the vertical direction. The cover member 10 is integrally molded from an electrically insulating synthetic resin such as 9T nylon or liquid crystal polymer (LCP), and is roughly symmetrical with respect to the center lines O ₁ -O ₁ and O ₂ -O _2. Moreover, it is formed so as to form a rectangular tube shape that is open up and down.

  As shown in detail in FIGS. 6 and 7, the cover member 10 includes a front wall 11, a left side wall 12, a rear wall 13 and a right side wall 14, and adjacent walls are orthogonal to each other. A rectangular tube is formed.

On the front surface of the front wall 11 of the cover member 10, a substantially U-shaped mounting recess 21 is formed symmetrically with respect to the center line O ₂ -O _{2 of the} socket 1 when viewed from the front where the cold cathode tube is mounted. (See FIG. 3). The mounting recess 21 is opened forward and upward, and the lower surface 211 is formed in an arc shape in accordance with the circular cross section of the cold cathode tube 90. Therefore, one end of the cold cathode tube 90 can be placed on the arcuate lower surface 211 of the placement recess 21 from above the placement recess 21. The width of the mounting recess 21 is set to be slightly larger than the diameter of the cold cathode tube 90, and the length (height) from the upper surface of the front wall 11 to the arcuate lower surface 211 of the mounting recess 21 is the cover member. 10 is in the first position, and when the cold cathode tube 90 is placed in the placement recess 21, the dimmet wire 91 of the cold cathode tube 90 is set to be located above a contact 50 described later. The depth of the mounting recess 21 is set as appropriate.

In the front wall 11 of the cover member 10, a first guide groove 22 that guides a jimet wire 91 that is an external terminal of the cold cathode tube 90 is further formed behind the mounting recess 21. The first guide groove 22 is substantially U-shaped when viewed from the front, is formed symmetrically with respect to the center line O ₂ -O _{2 of} the socket 1, passes through the front wall 11, and opens upward. Yes. The lower surface 221 of the first guide groove 21 is also preferably formed in an arc shape. The arcuate lower surface 221 of the first guide groove 22 is formed at a position that is the same as or slightly higher than the arcuate lower surface 211 of the mounting recess 21. What is the difference in height between the arcuate lower surface 211 of the mounting recess 21 and the arcuate lower surface 221 of the first guide groove 22 as long as it is less than the difference between the radius of the cold cathode tube 90 and the radius of the jimet line? May be set. The width of the first guide groove 22 is set slightly larger than the diameter of the jimet wire 91.

  A first cam body 15 and a third cam body 17 are provided at predetermined positions on both sides of the first guide groove 22 on the rear surface of the front wall 11 of the cover member 10. The first cam body 15 is formed on the left side of the first guide groove 22 and acts on a drive piece 51a provided on a left contact piece 50a constituting a contact 50 described later. The third cam body 17 is formed on the right side of the first guide groove 22 and acts on the drive piece 51 b that is common to the right contact pieces 50 b 1 and 50 b 2 constituting the contact 50. Thereby, the first cam body 15 and the third cam body 17 together with the second cam body 16 and the fourth cam body 18 provided on the rear wall 13 to be described later, the left and right contacts as the cover member 10 moves up and down. Open and close the piece.

  The first cam body 15 has a substantially trapezoidal cross section having an upper inclined surface 151 that forms a cam surface, a first vertical surface 152, a lower inclined surface 153, and a second vertical surface 154 that forms a bottom surface. It is formed so as to protrude (see FIGS. 7 and 13, etc.). The second vertical surface 154 is parallel to the first vertical surface 152 and is longer in the vertical direction than the first vertical surface. Further, it is more preferable that the second vertical surface 154 is parallel to the left vertical surface of the guide groove 22 and is formed flush with the same as in this embodiment. When the cover member 10 is in the first position where the cover member 10 is located above the socket body 30, the lower end of the lower inclined surface 153 of the first cam body 15 is the lower end of the drive piece 51a of the left contact piece 50a. It is formed so as to be located on the right side. Furthermore, when the cover member 10 is in the second position where the cover member 10 is positioned below the socket body 30, the upper cam surface 151 of the first cam body has an upper end on the upper inclined surface 151 of the left contact piece 50a. It is formed so as to be located on the right side.

The third cam body 17 has the same trapezoidal cross-sectional shape as the first cam body 15, and is arranged symmetrically with respect to the first cam body 15 and the center line O ₂ -O _{2 when} viewed from the rear. (See FIGS. 7 and 13 etc.). However, the position of the third cam body 17 in the front-rear direction is more forward than the first cam body 15 due to the difference in the length in the front-rear direction of the drive pieces 51 a and 51 b provided on the left and right contact pieces of the contact 50. Formed (see FIG. 2). Specifically, the third cam body 17 is formed to project a predetermined length rearward from the rear surface of the front wall 11 formed with a thin thickness (length in the front-rear direction).

  On the bottom surface 111 of the front wall 11 of the cover member, a left front leg portion 26 and a right front leg portion 28 are provided at the left and right corners of the front end. The left front leg portion 26 and the right front leg portion 28 extend vertically downward from the bottom surface 111, and locking claws 261 and 281 are provided on the lower ends of the left front leg portion 26 and the right front leg portion 28, respectively. The claw 261 is formed to protrude toward the left side and the locking claw 281 toward the right side). When the cover member 10 is in the second position, the left front leg portion 26 and the right front leg portion 28 are fitted into a vertical hole (not shown) provided in the bottom wall 35 of the socket body 30 described later. Further, when the cover member 10 is in the first position, the locking claws 261 and 281 are formed on the upper surfaces of the front window portions 326 and 346 formed in front of the left and right side walls 32 and 34 of the socket body 30 described later. Engage and prevent the cover member 30 from coming off upward. In this embodiment, the bottom surface 111 of the front wall 11 is in contact with the lower ends of the first and third cam bodies 15, 17, and includes a bottom surface 124 of the left side wall 12 and a bottom surface 144 of the right side wall 14 described later. They are formed flush with each other (see FIG. 5).

  At the upper end of the outer surface (left side surface) 122 of the left side wall 12 of the cover member 10, an engagement protrusion 123 that fits into an engagement recess 325 formed in the left side wall 32 of the socket body 30 described later is formed from the outer surface 122. It is formed so as to protrude toward the outside (left side). The amount of protrusion of the engaging protrusion 123 (the length in the left-right direction protruding from the outer surface 122) is set to be approximately equal to the width of the left side wall 32 of the socket body 30. Further, the height of the engagement protrusion 123 is equal to the depth (length in the vertical direction) of the engagement recess 325, and the depth of the engagement protrusion 123 is set to be approximately equal to the depth of the engagement recess 325. . Therefore, when the cover member 10 is in the second position, the upper surface of the cover member 10 and the upper surface of the socket body 30 and the left side surface of the cover member 10 and the left side surface of the socket body 30 are all flush with each other.

  A locking claw 125 is also formed at a predetermined position on the outer surface 122 of the left side wall 12 of the cover member 10. When the cover member 10 is in the second position, the locking claw 125 is locked to the upper end surface of the rear window portion 327 (see FIG. 5) provided on the left side wall 32 of the socket body 30 to be described later. The cover member 10 is prevented from coming out upward. A holding claw 126 (see FIG. 7) is further formed on the outer surface 122 below the center in the front-rear direction. The holding claw 126 is provided together with the holding claw 146 provided symmetrically on the right side wall 14 to maintain the first position when the cover member 10 is in the first position.

  In the left side wall 12 of the cover member 10, the inner surface (right side surface) 121 has a contact piece 50 a along the cam surface of the first cam body provided on the front wall 11 and the second cam body 16 provided on the rear wall 13 described later. It is comprised so that the movement to the left direction may not be prevented. In the present embodiment, considering the miniaturization of the socket 1, the width (thickness) of a predetermined portion of the left side wall 12 is reduced to form an interval between the cam bodies 15 and 16 ( (See FIG. 7, FIG. 13, etc.)

On the rear wall 13 of the cover member 10, the second guide groove 23 that faces the first guide groove 22 formed on the front wall 11 described above and similarly guides the jimet wire 91 that is an external terminal of the cold cathode tube 90. Is formed. The second guide groove 23 is substantially U-shaped when viewed from the rear, is formed symmetrically with respect to the center line O ₂ -O _{2 of} the socket 1, passes through the rear wall 13, and opens upward. The lower surface 231 is formed in an arc shape. The arcuate lower surface 231 of the second guide groove 23 may be formed at the same position as or slightly lower than the arcuate lower surface 221 of the first guide groove 22. The width of the second guide groove 23 is the same as the width of the first guide groove 22, and is set slightly larger than the diameter of the jimet wire 91.

  A second cam body 16 and a fourth cam body 18 are provided at predetermined positions on both sides of the second guide groove 23 on the front surface of the rear wall 13 of the cover member 10. The second cam body 16 is opposed to the first cam body 15 formed on the front wall 11 and is formed on the left side of the second guide groove 23. Together with the first cam body 15, the second cam body 15 forms a contact 50 described later. It acts on the drive piece 51a provided in the contact piece 50a. The fourth cam body 18 faces the third cam body 17 formed on the front wall 11, is formed on the right side of the second guide groove 23, and together with the third cam body 17, a right contact piece that constitutes a contact 50. It acts on the drive piece 51b common to 50b1 and 50b2.

  As clearly shown in FIG. 7, the second cam body 16 is flush with the upper inclined surface 161, the first vertical surface 162, the lower inclined surface 163, and the right vertical surface of the second guide groove 23 forming the cam surface. The second vertical surface 164 is formed. The second cam body 16 has a trapezoidal shape that is exactly the same as that of the first cam body 15 and is located at the same height as the first cam body 15 from the rear surface of the rear wall 13 toward the front first cam body 15. It is formed to protrude. Therefore, the second cam body 16 is also set so that the lower end of the lower inclined surface 163 is positioned on the right side of the drive piece 51a of the left contact piece 50a when the cover member 10 is in the first position. Similarly, when the cover member 10 is in the second position, the second cam body 16 is set such that the upper end of the upper inclined surface 161 of the second cam body is located on the right side of the drive piece 51a of the left contact piece 50a. The

  The fourth cam body 18 has the same trapezoidal cross-sectional shape as the third cam body 17 and is located at the same height position as the third cam body 17 from the rear surface of the rear wall 13 to the front third cam body 17. It is formed so as to protrude. However, the position of the fourth cam body 18 in the front-rear direction is rearward of the second cam body 16 due to the difference in the length in the front-rear direction of the drive pieces 51a, 51b provided on the left and right contact pieces of the contact 50. Formed (see FIG. 2). Specifically, the fourth cam body 18 is formed so as to protrude forward from the front surface of the rear wall 13 formed with a thin thickness (length in the front-rear direction). In the present embodiment, the fourth cam body 18 is formed so as to protrude until the front surface of the fourth cam body 18 is flush with the front surface of the portion on the left side of the second guide groove 23 of the rear wall 13.

  A left rear leg portion 27 and a right rear leg portion 29 are provided on the bottom surface 131 of the rear wall 13 of the cover member 10 at the left and right corners of the rear end thereof. The left rear leg portion 27 and the right front leg portion 29 extend vertically downward from the bottom surface 131. In this embodiment, the bottom surface 131 of the rear wall 13 is formed so as to be positioned below the bottom surface 124 of the left side wall 12 and the bottom surface 144 of the right side wall 14 described later, but is not limited thereto. . Similar to the front wall 11, the position may be in contact with the lower ends of the second and fourth cam bodies 16, 18 and may be flush with the bottom surface 124 of the left side wall 12 and the bottom surface 144 of the right side wall 14 described later. . In this embodiment, the lower rear legs 27 and the right rear legs 29 are not provided with locking claws for preventing them from coming off unlike the left front legs 26 and the right front legs 28. Such locking claws may also be provided at the lower ends of the rear leg portion 27 and the right rear leg portion 29.

At the upper end of the outer surface (right side surface) 142 of the right side wall 14 of the cover member 10, an engagement protrusion 143 that fits into an engagement recess 345 formed in the right side wall 34 of the socket body 30 described later is formed from the outer surface 142. It is formed so as to protrude toward the outside (right side). The engaging protrusions 143 are arranged symmetrically with respect to the engaging protrusion 123 provided on the left side wall 12 and the center line O ₂ -O ₂ . The amount of protrusion of the engaging protrusion 143 (the length in the left-right direction protruding from the outer surface 142) is set to be approximately equal to the width of the right side wall 34 of the socket body 30. Further, the height of the engagement protrusion 143 is equal to the depth (length in the vertical direction) of the engagement recess 345, and the depth of the engagement protrusion 143 is set to be approximately equal to the depth of the engagement recess 345. . Therefore, when the cover member 10 is in the second position, the upper surface of the cover member 10 and the upper surface of the socket body 30 and the right side surface of the cover member 10 and the right side surface of the socket body 30 are all flush with each other (see FIG. 12). ).

  A locking claw 145 is also formed at a predetermined position on the outer surface 142 of the right side wall 13 of the cover member 10. When the cover member 10 is in the second position, the locking claw 145 is locked to the upper end surface of the rear window 347 provided on the right side wall 32 of the socket body 30 described later, and the cover member 10 is Prevent slipping out. A holding claw 146 (see FIGS. 1 and 6) is further formed on the outer surface 142 below the center in the front-rear direction. As described above, the holding claws 146 are provided together with the holding claws 126 provided symmetrically on the left side wall 12 to maintain the first position when the cover member 10 is in the first position. Yes.

  Also in the right side wall 13 of the cover member 10, the inner surface (right side surface) 141 has the left contact portion 50 b in the left direction along the cam surfaces of the third cam body 17 and the fourth cam body 18 provided on the front wall 11. It is comprised so that a movement may not be prevented (refer FIG. 7).

  A guide protrusion 24 may be provided on the upper end of the inner surface 141 of the right side wall 13 of the cover member 10 at a substantially central portion in the front-rear direction. The guide protrusion 24 protrudes from the inner surface 141 toward the inner side (left side) and extends to reach a plane including the right side surface of each of the first guide groove 22 and the second guide groove 23 (see FIG. 7).

Next, the socket body 30 will be described. The socket body 30 is a member that supports the cover member 10 so as to be movable up and down and holds a contact 50 described later. Like the cover member 10, the socket body 30 is integrally formed from an electrically insulating synthetic resin and is roughly symmetrical with respect to the center lines O ₁ -O ₁ and O ₂ -O ₂ . It is formed so as to form a case opened upward.

  As shown in detail in FIGS. 8 and 9, the socket body 30 includes a front wall 31, a left side wall 32, a rear wall 33, a right side wall 34 and a bottom wall 35, wherein the adjacent walls are orthogonal to each other. A rectangular casing as viewed from above is formed.

  A rectangular through hole 36 is formed in the bottom wall 35 of the socket body 30 when viewed from above where the contact 50 is disposed. The position of the upper surface of the bottom wall 35 on the front wall 31 side is set so that the bottom surface 111 of the front wall 11 of the cover member 10 abuts when the cover member 10 is in the second position. Similarly, when the cover member 10 is at the second position, the bottom surfaces 124 and 144 of the left and right side walls 12 and 14 of the cover member 10 are in contact with each other. Set to touch. Mounting holes 35a and 35b into which fixing members 62a and 62b of contacts 50 described later are press-fitted are formed on the left and right sides of the bottom wall 35. The mounting holes 35a and 35b are formed so as to open at least downward, but may pass through the bottom wall 35.

  At the four corners of the bottom wall 35 of the socket body 30, that is, outside the front wall 31 and the left and right side walls 32 and 34, and the intersection of the rear wall 33 and the left and right side walls 32 and 34, the front bases 31a and 31b and the rear base 33a , 33b are formed to project from side to side. The upper surfaces of the four pedestals 31a, 31b, 33a and 33b and the left and right terminal portions 61a and 61b of the contact 50 described later are formed to be flush with each other, and the wiring board 100 is placed thereon (see FIG. 11). . Although not shown, the left front leg 26, the right front leg 28, the left rear leg 27, and the right front leg 29 of the cover member 10 are fitted inside the four corners of the bottom wall 35 of the socket body 30. A vertical hole is formed. The four vertical holes may be formed so as to penetrate through the four bases 31a, 31b, 33a and 33b provided below the four corners. These four vertical holes are also formed adjacent to the insides of front window portions 326 and 327 and rear window portions 327 and 347 formed in front and rear of left and right side walls 32 and 34, which will be described later. . In other words, the four vertical holes communicate with the front window portions 326 and 327 and the rear window portions 327 and 347, respectively.

The front wall 31 of the socket body 30 is formed with a support recess 311 that supports one end of the cold cathode tube 90 when the cold cathode tube 90 is attached to the socket 1. The support recess 311 is substantially U-shaped when viewed from the front, and is formed symmetrically with respect to the center line O ₂ -O _{2 of} the socket 1 (see FIG. 3). The support recess 311 penetrates the front wall 31 and opens upward, and the lower surface is formed in an arc shape in accordance with the circular cross section of the cold cathode tube 90. The width of the support recess 311 is set slightly larger than the diameter of the cold cathode tube 90. That is, the support recess 311 has substantially the same shape as the mounting recess 21 formed in the front wall 11 of the cover member 10 described above. However, the mounting recess 21 is deeper than the support recess 311 (the length from the upper surfaces of the front walls 11 and 31 to the lower surfaces of the recesses 21 and 311). Therefore, when the cold cathode tube 90 is attached to the socket 1 and the cover member 10 is lowered from the first position to the second position, the cold cathode tube 90 moves from the mounting recess 21 to the support recess 311. Thereby, the positioning of the jimet wire of the cold cathode tube 90 in contact with the contact 50 is reliably performed with respect to the contact 50 fixed to the socket body 30.

  Above the left side wall 32 of the socket body 30, an engagement recess 325 is formed in which the engagement projection 123 provided on the left side wall 12 of the cover member 10 is fitted. The engaging recess 325 penetrates the left side wall 32 to the left and right and opens upward. An elongated front window portion 326 and a rear window portion extending in the vertical direction along the front wall 31 and the rear wall 33 inside the front wall 31 and the rear wall 33 before and after the left side wall 31 of the socket body 30. 327 is formed. The front window portion 326 and the rear window portion 327 penetrate the left side wall 32 in the left-right direction, and are opened downward through the pedestals 31a and 33a.

  A guide groove 321 for guiding the holding claw 126 provided on the left side wall 12 of the cover member 10 is formed on the inner surface of the left side wall 32 of the socket body 30 at the center in the front-rear direction. The guide groove 321 is not limited to this structure, but in this embodiment, the guide groove 321 extends vertically downward from a position slightly below the lower surface of the engagement recess 325 and is formed in the bottom wall 35. It is continuous with the left mounting hole 35a.

A third guide groove 331 for guiding a zimet wire 91 that is an external terminal of the cold cathode tube 90 is formed above the rear wall 33 of the socket body 30. The third guide groove 331 is substantially U-shaped when viewed from the rear, is formed symmetrically with respect to the center line O ₂ -O _{2 of} the socket 1, passes through the rear wall 33, and opens upward. The lower surface is formed in an arc shape. The width of the third guide groove 331 is set slightly larger than the diameter of the jimet wire 91. That is, the third guide groove 331 has substantially the same shape as the second guide groove 23 formed in the rear wall 13 of the cover member 10 described above. However, the third guide groove 331 is deeper than the second guide groove 23 (the length from the upper surfaces of the rear walls 33 and 13 to the lower surfaces of the guide grooves 331 and 23).

The right side wall 34 of the socket body 30 is formed substantially symmetrically with the left side wall 32 with the center line O ₂ —O ₂ of the socket 1 interposed therebetween. Specifically, an engagement recess 345 into which an engagement protrusion 143 provided on the right wall 14 of the cover member 10 is fitted is formed above the right wall 34 of the socket body 30. The engaging recess 345 penetrates the right side wall 34 to the left and right and opens upward. Further, an elongated front window portion 346 and a rear portion extending in the vertical direction along the front wall 31 and the rear wall 33 inside the front wall 31 and the rear wall 33 before and after the right side wall 33 of the socket body 30. A window portion 347 is formed. The front window portion 346 and the rear window portion 347 penetrate the right side wall 32 in the left-right direction, and are opened downward through the bases 31b and 33b.

  Further, a guide groove 341 for guiding a holding claw 146 provided on the right side wall 14 of the cover member 10 is formed on the inner surface of the right side wall 32 of the socket body 30 at the center in the front-rear direction. The guide groove 341 is not limited to this structure, but in this embodiment, the guide groove 341 extends vertically downward from a position slightly below the lower surface of the engagement recess 345 and is formed in the bottom wall 35. It is continuous with the right mounting hole 35b.

  Next, the contact 50 used in the present embodiment will be described with reference to FIGS. 14 (a) to 16 (b).

  The entire structure of the contact 50 used in this embodiment is shown in FIG. The contact 50 is a normally closed contact, which is stamped from a conductive thin metal plate such as a Corson copper alloy or phosphor bronze alloy, and is integrally formed by pressing. As shown in FIG. 16 (a), the contact 50 is roughly divided into a left contact piece 50a, right contact pieces 50b1 and 50b2, contact support members 57a and 57b, a connecting member 58, a terminal support member 59, terminals 61a and 61b, And contact fixing members 62a and 62b.

  The left contact piece 50a includes a drive piece 51a, a bending portion 52a, a contact portion 53a, a bent portion 54a, and an elastic deformation portion 55a. The left contact piece 50a is supported on a left contact support piece 57a constituting a contact support member described later. When the socket 1 is assembled, the left contact piece 50a is generally disposed at a position corresponding to the guide protrusion 24 provided on the right side wall 14 of the cover member 10 as seen from above, as shown in FIG. It is preferable to set as follows.

  More specifically, the elastic deformation portion 55a disposed below the left contact piece 50a is bent toward the inside (right side) at a connection portion between the lower end of the elastic deformation portion 55a and the left contact support piece 57a. ing. That is, the elastically deforming portion 55a of the left contact piece 50a extends from the left contact support piece 57a so as to incline upward and inward. In this embodiment, as shown in FIG. 13A, the elastic deformation portion 55a of the left contact piece 50a intersects with an elastic deformation portion 55b1 or 55b2 of the right contact piece 50b1 or 50b2, which will be described later, as viewed from the front. Extend to. The elastic deformation portion 55a is supported in a cantilever shape by the left contact support piece 57a, and is elastically deformable in the left-right direction with respect to the left contact support piece 57a. In this embodiment, the elastically deforming portion 55a of the left contact piece 50a has a wide connection portion with the left contact support piece 57a at the lower end in the front-rear direction and narrows in the front-rear direction at the connection portion with the bent portion 54 at the upper end. It has a trapezoidal shape. However, the shape of the elastically deforming portion 55a of the left contact piece 50a is not limited to this. For example, the same width as the whole of the right contact pieces 50b1 and 50b2 (the length in the front-rear direction in the drawing). It may be a strip shape having.

  A bent portion 54a is provided above the elastic deformation portion 55a of the left contact piece 50a. The left contact piece 50a is bent outwardly (on the left side) at the bent portion 54a so as to have a substantially inverted “<” shape when viewed from the front. Following the bent portion 54a, an arc-shaped contact portion 53a is provided above the bent portion 54a as viewed from the front. The contact portion 53a is a portion that contacts the jimet wire 91 of the cold cathode tube 90, has an arc shape so as to form a recess toward the inner side (right side), and further extends in the vertical direction on the inner side. It is preferable that a rib 56a that protrudes inward is formed. The radius of curvature of the arc of the arc-shaped contact portion 53a is preferably sufficiently larger than the radius of the jimet line 91.

  Following the arcuate contact portion 53a of the left contact piece 50a, a curved portion 52a is provided above it. As shown in FIG. 16 (a), the left contact piece 50a is largely bent outward at the curved portion 52a until the left contact piece 50a is inverted, whereby the left contact piece 50a is directed downward. Extend.

  In addition, it is preferable that the curved part 52a, the contact part 53a, and the bending part 54a of the left contact piece 50a have the same length in the front-back direction.

  A drive piece 51a is provided below the curved portion 52a of the left contact piece 50a. The drive piece 51a has lower ends of the first cam body 15 and the second cam body 16 in which the front and rear ends of the drive piece 51 are provided in front and rear of the cover member 10 when the contact 50 is assembled and fixed to the contact body 30. It extends in the front-rear direction from the curved portion 52a so as to be arranged on the left side. The length of the drive piece 51a in the vertical direction is appropriately set to be the same as the width of the curved portion 52a (length in the front-rear direction), for example.

As shown in the figure, the right contact pieces 50b1 and 50b2 of the contact 50 are, in the present embodiment, a first right contact piece 50b1 and a second right contact piece that are provided symmetrically in the front-rear direction with the left contact piece 50a interposed therebetween. 50b2. The first right contact piece 50b1 and the second right contact piece 50b2 have exactly the same shape, and are formed symmetrically with the left contact 50a across the center line O ₂ -O ₂ of the socket 1 when viewed from the front. (See FIG. 13A). Therefore, here, the first right contact piece 50b1 will be briefly described, and the description of the second right contact piece 50b2 will be omitted. The second right contact piece 50b2 may be read by replacing the numeral 1 attached after the lowercase letter b with 2 in the description of the first right contact piece 50b1.

  The first right contact piece 50b1 includes a drive piece 51b shared with the second right contact piece 50b2, a curved portion 52b1, a contact portion 53b1, a bent portion 54b1, and an elastically deformable portion 55b1. The right contact piece 50b1 is supported on a right contact support piece 57b constituting a contact support member described later.

  More specifically, the elastic deformation portion 55b1 disposed below the first right contact piece 50b1 is directed toward the inner side (left side) at the connection portion between the lower end of the elastic deformation portion 55b1 and the right contact support piece 57b. It is bent. That is, the elastically deformable portion 55b1 of the first right contact piece 50b1 extends so as to incline upward and inward from the right contact support piece 57b. As described above, the elastic deformation portion 55b1 of the first right contact piece 50b1 extends until it intersects with the elastic deformation portion 55a of the left contact piece 50a as viewed from the front. The elastic deformation portion 55b1 of the first right contact piece 50b1 is supported in a cantilever shape by the right contact support piece 57b, and can be elastically deformed in the left-right direction with respect to the right contact support piece 57b. In the present embodiment, the elastic deformation portion 55b1 of the first right contact piece 50b1 extends in the vertical direction with the same width (length in the front-rear direction). However, the shape of the elastic deformation portion 55b1 of the first right contact piece 50b1 is not limited to this.

  A bent portion 54b1 is provided above the elastically deformable portion 55b1 of the first right contact piece 50b1. The first right contact piece 50b1 is bent at the bent portion 54b1 outward (on the right side) into a substantially “<” shape symmetrically with the bent portion 54a of the left contact piece 50a when viewed from the front. It is done. Following the bent portion 54b1, an arc-shaped contact portion 53b1 is provided above the symmetrical portion with the contact portion 53a of the left contact piece 50a when viewed from the front. The contact portion 53b1, like the bent portion 54a of the left contact piece 50a, is a portion that contacts the jimet wire 91 of the cold cathode tube 90, and has an arc shape so as to form a recess toward the inside (left side). I am doing. A rib 56a that extends in the vertical direction and protrudes toward the inner side is preferably formed inside the arcuate contact portion 53b1. In addition, it is preferable that the radius of curvature of the arc of the arcuate contact portion 53 a is sufficiently larger than the radius of the jimet line 91.

  Following the arcuate contact portion 53b1 of the first right contact piece 50b1, a curved portion 52b1 is provided above it. The first right contact piece 50b1 is formed symmetrically with the curved portion 52a of the left contact piece 50a when viewed from the front. That is, as shown in FIG. 16A, the first right contact piece 50b1 is largely bent outward at the curved portion 52b1 until the first right contact piece 50b1 is inverted, whereby the first right contact piece 50b1 is bent. The contact piece 50b1 extends downward.

  In addition, it is preferable that the curved part 52b1, the contact part 53b1, the bending part 54b1, and the elastic deformation part 55b1 of the first right contact piece 50b1 have the same length in the front-rear direction.

  A drive piece 51b is provided below the curved portion 52b1 of the first right contact piece 50b1. As described above, the drive piece 51b is shared with the second right contact piece 50b2. That is, the drive piece 51b connects the curved portions 52b1 and 52b2 of the first right contact 50b1 and the second right contact piece 50b2, respectively, and further extends forward from the curved portion 52b1 and backward from the curved portion 52b2. Exist. The drive piece 51b has lower ends of the third cam body 17 and the fourth cam body 18 in which the front and rear ends of the drive piece 51b are provided in front and rear of the cover member 10 when the contact 50 is assembled and fixed in the contact body 30. It extends forward from the curved portion 52b1 and rearward from the curved portion 52b2 so as to be disposed on the right side. Note that the length of the drive piece 51b in the vertical direction is appropriately set to be the same as the length of the drive piece 51a in the vertical direction, for example.

  The left and right contact support pieces 57a and 57b constituting the contact support members that respectively support the left contact piece 50a and the right contact pieces 50b1 and 50b2 are arranged in parallel. As shown in FIG. 15A, the left contact piece 50a and the right contact pieces 50b1 and 50b2 are arranged so that the left contact piece 50a is sandwiched between the first right contact piece 50b1 and the second right contact piece 50b2. Alternatingly arranged. The left and right contact support pieces 57a and 57b are connected by a connecting member 58 on the front side.

  At the lower end of the connecting member 58, a terminal support member 59 formed by being bent so as to form a substantially right angle rearward at the lower end is provided. The terminal support member 59 extends horizontally from the rear ends of the left and right contact support pieces 57a and 57b to the rear. With this configuration, the connecting member 58 and, by extension, the left contact piece 50a and the right contact pieces 50b1 and 50b2 connected to the connecting member 58 via the contact support pieces 57a and 57b, respectively, are connected to the terminal support member 59. It can swing in the front-rear direction.

  Left and right terminals 61a and 61b are provided on the left and right sides of the terminal support member 59 symmetrically. The left and right terminals 61a and 61b extend substantially horizontally from the terminal support member 59 in the left-right direction, are bent upward at appropriate positions, and extend horizontally again at the tip portions at the left and right ends. As described above, the top surfaces of the left and right terminals 61a and 61b are flush with the top surfaces of the front bases 31a and 31b and the rear bases 33a and 33b of the socket body 30 when the socket 1 is assembled. It is formed. In addition, contact fixing members 62a and 62b are provided on the left and right sides of the terminal support member 59 at the center in the front-rear direction. The contact fixing members 62 a and 62 b are pressed into mounting holes 35 a and 35 b provided in the bottom wall 35 of the socket body 30, respectively, thereby fixing the contact 50 to the socket body 30. In this embodiment, the contact fixing members 62a and 62b are cut and raised from the terminals 61a and 61b provided on the left and right sides of the terminal support member 59, and above the horizontal terminals 61a and 61b in the vicinity of the terminal support member 59. It is formed by being bent vertically toward the surface. The contact fixing members 62a and 62b are formed in parallel with each other and in parallel with the left and right contact support pieces 57a and 57b, respectively.

  The contact 50 according to the present embodiment has the above configuration. As shown in FIG. 16A, the left contact piece 50a and the right contact pieces 50b1 and 50b2 constituting the contact 50 are normally closed. Yes. At this time, no biasing force is applied to the left contact piece 50a and the right contact pieces 50b1 and 50b2, and the contact pieces 50a, 50b1 and 50b2 are in a free state. The contact 50 is incorporated in the socket body 30 and finally incorporated in the socket 1 and maintains this free state even when delivered as a product. Thus, in the socket 1 according to the present embodiment, the elastically deformable left contact piece 50a and the right contact pieces 50b1 and 50b2 constituting the contact 50 are incorporated in the socket 1 in a free state. Therefore, after the socket 1 according to the present embodiment is delivered, when the socket 1 is reflow soldered to the wiring board 100, the contact 50, particularly the left and right contact pieces 50a, 50b1, 50b2 are thermally deformed by reflow heat. There is nothing to do. As a result, the elastic force of each contact piece 50a, 50b1, 50b2 changes, and the predetermined contact pressure between each contact piece 50a, 50b1, 50b2 and the jimet wire 91 is prevented from changing.

  As will be described later, the left contact piece 50a and the right contact pieces 50b1 and 50b2 constituting the contact 50 according to the present embodiment are moved between the first position and the second position of the cover member 10, Opened and closed. Therefore, the cold cathode tube 90 can be easily attached to and detached from the socket 1, and the jimet wire 91 as an external electrode of the cold cathode tube 90 is not deformed. Further, when the cover member 10 is in the first position and the second position, the contact 50 is free with respect to the cover member 10 (for example, the cam bodies 15 to 18), as will be described later. A spring force is not applied to the cover member 10. Therefore, when the cover member 10 continues to maintain the first position or the second position for a long time, the load due to the contact 50 to the cover member 10 is not applied, so that the deformation of the cover member 10 is prevented. .

  In the contact 50 according to the present embodiment, ribs 56a, 56b1, and 56b2 are provided at contact portions 53a, 53b1, and 53b2 of left contact pieces 50a and two right contact pieces 50b1 and 50b2 that are alternately arranged. Therefore, as will be described later, when the cold cathode tube 90 is attached to the socket 1, the jimet wire 91 and the contact 50 of the cold cathode tube 90 can contact at three points. With 1, the contact reliability is improved, and electrical connection can be reliably obtained. In addition, the jimet wires 91 of the cold cathode tubes 90 are alternately viewed from the left and right as viewed from the front by the left and right contact pieces 50a, 50b1, and 50b2 (more specifically, the contact portions 53a, 53b1, 53b2). Touch to be pinched. Therefore, the jimet wire 91 of the cold cathode tube 90 and the contact 50 can be brought into contact with each other at a desired contact pressure, and a stable electrical connection can be obtained.

  The contact 50 in this embodiment is fixed to the socket body 30 via contact fixing members 62 a and 62 b provided on the terminal support member 59. Thereby, the left and right contact pieces 50a and 50b1, 50b2 can swing in the front-rear direction with respect to the socket body 30 as described later (see FIG. 18). In this configuration, even when the cold cathode tube 90 is attached to the socket 1, even if the jimet wire 91 of the cold cathode tube 90 linearly expands due to the heat generated with the use of the cold cathode tube 90, the dimmet wire 91. It is possible to absorb the linear expansion.

  Although the contact 50 in the present embodiment has been described above, the contact 50 is not limited to this configuration. For example, the left contact piece 50a and the right contact pieces 50b1 and 50b2 may be provided to be reversed left and right. Further, as shown in FIGS. 17A and 17B, the left contact piece 550a and the right contact piece 550b constituting the contact 550 may each be composed of one contact piece, or the left and right contact pieces. May have a large number of contact pieces. In any case, the contact may have a configuration in which the left and right contact pieces constituting the contact are arranged symmetrically when viewed from the front, and the left and right contact pieces are alternately arranged in the front-rear direction. Note that the contact 550 shown in FIGS. 17A and 17B may be read by adding 500 in the description of the contact 50, and the description is omitted here.

  Next, an operation for mounting the cold cathode tube 90 to the cold cathode tube socket 1 will be described with reference to FIGS. 10 to 12, FIGS. 13A to 13C, and the like.

  The socket 1 is a member for electrically connecting the cold cathode tube 90 to the wiring board 100 and is attached to the wiring board 100 in a pair. In this embodiment, as shown in FIG. 11, the terminals 61a and 61b of the contacts 50 of the pair of sockets 1 are back surfaces opposite to the surface side on which the cold cathode tubes 90 of the wiring board 100 are arranged. It is electrically connected to the external terminal of the wiring board 100 on the side. The connection between the wiring board 100 and the socket 1 may be performed on the surface side of the wiring board 100. In this case, the lower surfaces of the terminals 61a and 61b are formed flush with the lower surfaces of the front pedestals 31a and 31b and the rear pedestals 33a and 33b.

  When the cold cathode tube 90 is not attached to the socket 1 or immediately before the attachment, the cover member 10 is in a first position located above the socket body 30 as shown in FIG. . In the cover member 10, holding claws 126 and 146 formed on the left and right side walls 12 and 14 respectively engage with upper surfaces of engaging recesses 325 and 345 formed on the left and right side walls 32 and 34 of the socket body 30. Thus, the first position is maintained. Further, the lower ends of the first to fourth cam bodies 15 to 18 of the cover member 10 are disposed inside the left and right drive pieces 51a and 51b of the contact 50, as clearly shown in FIG. However, the drive pieces 51 a and 51 b of the contact 50 are not in contact with the cam bodies 15, 16, 17 and 18. When the cover member 10 is in the first position, the locking claws 261 and 281 of the left and right front legs 26 and 28 provided below the front wall 11 of the cover member 10 are the left and right side walls of the socket body 30. The front window portions 326 and 346 formed at 32 and 34 are locked to the upper surface. Thereby, the cover member 10 is prevented from coming off from the socket body 30.

  When the cover member 10 is in the first position, one end portion of the cold cathode tube 90 is inserted into the mounting recess 21 from above the mounting recess 21 formed on the front wall 11 of the cover member 10. It is placed on the lower surface 211 of the recess 21. Dimet wires 91, which are external electrodes of the cold cathode tube 90, are formed on the first guide groove 22 and the second guide groove 23 formed on the front wall 11 and the rear wall 13 of the cover member 10 and the guide protrusion 24 of the right side wall 14, respectively. It is guided and inserted into the first guide groove 22 and the second guide groove 23. When the cold cathode tube 90 is placed on the cover member 10, since no external force acts on the cold cathode tube 90 itself and the jimet wire 91 of the cold cathode tube 90, the cold cathode tube 90 can be easily placed. Note that the jimet line 91 may or may not reach the lower surfaces of the first and second guide grooves. In any case, the jimet line 91 is located above the closed contact 50 as shown in FIG.

At this time, as shown in FIG. 13A, the center line passing through the cold cathode fluorescent lamp 90 (and hence the zimet line 91) is parallel to the center line O ₁ -O ₁ passing through the socket 1, and the center line Crosses O ₂ -O ₂ at a right angle. That is, the center line passing through the cold cathode tube 90, the center line O ₁ -O ₁ passing through the socket ₁ and the center line O ₂ -O ₂ form the same plane. This state is maintained until the cold cathode tube 90 is completely attached to the socket 1.

  From the state of FIG. 10 or FIG. 13A in which the cover member 10 is in the first position, the cover member 10 is attached to the socket body 30 against the holding force of the holding claws 126 and 146 using a jig or the like. Push down toward the second position below.

  As the cover member 10 is lowered, the lower inclined surfaces 153 and 163 of the first and second cam bodies 15 and 16 provided on the cover member 10 are the inner surfaces of the front and rear portions of the drive piece 51a of the left contact piece 50a of the contact 50. And move to the left. Accordingly, the elastic deformation portion 55a of the left contact piece 50a is elastically deformed, and the contact portion 53a is moved to the left (outside). Similarly, the lower inclined surfaces 173 and 183 of the third and fourth cam bodies 17 and 18 come into contact with the inner surfaces of the front and rear portions of the common drive piece 51b of the right contact pieces 50b1 and 50b2, and move to the right (outside). . Thereby, the contact portions 53b1 and 53b2 of the right contact pieces 50b1 and 50b2 are also opened outward. Further, the cold cathode tube 90 placed in the placement recess 21 of the cover member 10 is also lowered, and therefore the jimet wire 91 is also lowered.

  When the cover member 10 is further lowered and the jimet wire 91 of the cold cathode tube 90 reaches the upper end of the contact 50 as shown in FIG. 13B, the left contact piece 50a is moved to the left (outside). Open to the full. At this time, the drive piece 51a of the left contact piece 50a rides on the vertical surfaces 152 and 162 of the first and second cam bodies 15 and 16, respectively. Similarly, the common drive piece 51b of the right contact pieces 50b1 and 50b2 also rides on the first vertical surfaces 172 and 182 of the third and fourth cam bodies 17 and 18, respectively, so that the right contact pieces 50b1 and 50b2 are moved to the right. It is fully open (outside). That is, the left and right contact pieces 50 a and 50 b 1, 50 b 2 constituting the contact 50 are opened left and right toward the outside in order to receive the jimet wire 91. At this time, the contact 50 or The first to fourth cam bodies 15, 16, 17, 18 are designed.

  When the lowering of the cover member 10 further proceeds, the drive pieces 51a, 51b of the left and right contact pieces 50a, 50b1, 50b2 are the upper inclined surfaces 151, 161, 171 of the first to fourth cam bodies 15, 16, 17, 18 respectively. , 181, move inward along the upper inclined surfaces 151, 161, 171, 181 and close gradually. At this time, the jimet wire 91 of the cold cathode tube 90 is lowered so as to be positioned between the contact portions 53a, 53b1, and 53b2 of the left and right contact pieces 50a, 50b1, and 50b2. Further, the end of the cold cathode tube 90 is transferred from the mounting recess 21 of the cover member 10 to the support recess 311 of the socket body 30. Therefore, the cold cathode tube 90 and the jimet wire 91 do not descend even when the cover member 10 is further lowered.

  When the cover member 10 is completely lowered to the second position, the drive pieces 51a, 51b of the left and right contact pieces 50a, 50b1, 50b2 are completely removed from the contact of the first to fourth cam bodies 15, 16, 17, 18 Fall off. At this time, as shown in FIG. 13C, the driving pieces 51a and 51b are outside the upper ends of the upper inclined surfaces 151, 161, 171, and 181 of the first to fourth cam bodies 15, 16, 17, and 181, respectively. Located in. Therefore, the left and right contact pieces 50a, 50b1, and 50b2 that are no longer restrained by the cam bodies 15, 16, 17, and 18 return to the initial positions by the restoring force of the elastically deforming portions 55a, 55b1, and 55b2. However, as described above, since the jimet wire 91 exists between the contact portion 53a of the left contact piece 50a and the contact portions 53b1 and 53b2 of the right contact pieces 50b1 and 50b2, the left and right contact pieces 50a, 50b1 and 50b2 are Contact is made so as to sandwich the jimet wire 91. As a result, the contact portion 53a of the left contact piece 50a and the contact portions 53b1 and 53b2 of the right contact pieces 50b1 and 50b2 are in electrical contact with the jimet wire 91 at a desired contact pressure. At this time, the minimum interval t between the opposing surfaces of the curved portions 52a, 52b1, 52b2 provided above the left and right contact pieces 50a, 50b1, 50b2 is designed to be smaller than the outer diameter of the jimet wire 91. It is preferable. As a result, when the cold cathode tube 90 is mounted in the socket 1, it is possible to prevent the jimet wire 91 and thus the cold cathode tube 90 from coming off upward.

  The lowering of the cover member 10 to the second position is caused by the bottom surface 111 of the front wall 11 of the cover member 10 and the bottom surfaces 124 and 144 of the left and right side walls 12 and 14 coming into contact with the upper surface of the bottom wall 35 of the socket body 30. Stop. When the cover member 10 reaches the second position, the locking claws 125 and 145 formed on the left and right side walls 12 and 14 of the cover member 10 are formed on the left and right side walls 32 and 34 of the socket body 30. The rear windows 327 and 347 are locked to the upper surface. Thereby, the cover member 10 maintains the second position.

  After the cover member 10 is lowered to the second position and the cold cathode tube 90 is completely attached to the socket 1, the cold cathode tube 90 is heated by the current sent from the wiring board 100 during use and is not Cooled when in use. As a result, the jimet wire 91 of the cold cathode tube 90 expands or contracts. In the present embodiment, the contact 50 that contacts and supports the jimet wire is configured to absorb the expansion and contraction of the jimet wire 91. Specifically, as shown in FIG. 18, the connecting piece 58 that connects the left and right contact support pieces 57a and 57b to the terminal support member 59 fixed to the socket body 30 can swing in the front-rear direction. It is connected. Accordingly, the left and right contact pieces 50a, 50b1, and 50b2 respectively supported by the left and right contact support pieces 57a and 57b can swing back and forth with respect to the socket body 30 as indicated by an arrow A. As a result, the left and right contact pieces 50 a, 50 b 1, 50 b 2 can follow the longitudinal contraction of the cold cathode tube 90 supported by the socket body 30. Accordingly, the jimet wire 91 does not slide with respect to the contact 50 and is not damaged by friction or wear.

  The operation for attaching the cold cathode tube 90 to the socket 1 has been described above. The operation of removing the cold cathode tube 90 from the socket 1 may be performed in reverse of the mounting operation. That is, the cover member 10 held at the second position is pulled up to the upper first position against the locking force to the upper surfaces of the rear windows 327 and 347 of the locking claws 125 and 145. The cold cathode tube 90 can be easily taken out. When the cover member 10 moves from the second position to the first position, the contact 50 opens and closes along the first to fourth cam bodies 15 to 18 and simultaneously rises to the jimet wire 91 of the cold cathode tube 90 that rises. No power is applied. When the cover member 10 is raised to the first position, the cold cathode tube 90 and the jimet wire 91 are supported by the cover member 10 as shown in FIGS. 10 and 13A. Therefore, the cold cathode tube 90 can be easily removed from above the cover member 10 of the socket 1 by, for example, vacuum suction.

As described above, the embodiment of the cold cathode tube socket according to the present invention has been described. The cold cathode tube socket, as described in the present specification, includes a cover member that is a rectangular prismatic body as viewed from above. It is not limited to a combination structure with a socket body that is a rectangular housing as viewed from above. For example, both the cover member and the socket body may have a combined structure that is a circular body, a polygonal shape, an elliptical shape or the like when viewed from above, or one of them is rectangular when viewed from above. The other may be circular, polygonal or elliptical when viewed from above. In any of these cases, the contact fixed to the bottom wall of the socket body is the same as that in the above embodiment. Accordingly, the cover member and the socket body has a center line O ₁ -O ₁ and O ₂ -O ₂ of the socket formed by a combination thereof, these center lines O ₁ -O ₁ and O ₂ -O ₂ As long as the shape is symmetrical with respect to.

It is a perspective view of the embodiment which concerns on the socket for cold cathode tubes of this invention. FIG. 2 is a top view of the cold cathode tube socket shown in FIG. 1. It is a front view of the socket for cold cathode tubes shown by FIG. It is a side view of the socket for cold cathode tubes shown by FIG. It is sectional drawing which follows the VV line | wire of the socket for cold cathode tube shown by FIG. It is a perspective view of the cover member which comprises the socket for cold cathode tubes shown by FIG. It is sectional drawing which follows the VII-VII line of the cover member of FIG. It is a perspective view of the socket main body which comprises the socket for cold cathode tubes shown by FIG. It is sectional drawing which follows the IX-IX line of the socket main body of FIG. It is a perspective view which shows the state by which the cold cathode tube shown by FIG. 1 was mounted in the mounting recessed part of the socket for cold cathode tubes. FIG. 8 is a side view showing a state where the cover member is pushed down from the state of FIG. 7 and the cold cathode tube is completely attached to the socket. It is a perspective view of the socket in the state of FIG. FIG. 11 is a diagram for explaining an operation of mounting a cold cathode tube on the cold cathode tube socket of FIG. 1, and (a) is a diagram illustrating that the cold cathode tube shown in FIG. It is sectional drawing which follows the VIII-VIII line of FIG. 1 which shows the state mounted in the recessed part, (b) is a VIII-VIII line of FIG. 1 which shows the state by which the cover member was pushed down and the contact was opened. It is sectional drawing which follows, (c) is sectional drawing which follows the VIII-VIII line | wire of FIG. 1 which shows the state by which the cover member was pushed down similarly to FIG. 11, and the cold cathode tube was completely mounted | worn with the socket. FIG. 2 is an enlarged perspective view of a main part of a contact of the cold cathode tube socket shown in FIG. 1, (a) is a perspective view showing a state in which the contact is closed, and (b) is a diagram in which a jimet wire is sandwiched between the contacts. FIG. It is a principal part expanded top view of the contact shown by FIG. 14, (a) is a top view which shows the free state with which the contact is closed, (b) is the state by which the jimet line is clamped by the contact FIG. It is a perspective view which shows the whole contact of the socket for cold cathode tubes shown by FIG. 1, (a) is a perspective view which shows the free state with which the contact is closed, (b) is the contact opened. It is a perspective view which shows a state. Another embodiment of the contact is shown, in which (a) is a perspective view showing a free state in which the contact is closed, and (b) is a perspective view showing a state in which the contact is opened. It is a principal part expanded side view which shows the countermeasure against thermal expansion of the cold cathode tube attached to the socket for cold cathode tubes shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cold cathode tube socket 10 Cover member 11 Front wall 12 Left side wall 13 Rear wall 14 Right side wall 15 First cam body 151 Upper inclined surface 152 (of the first cam body) First vertical surface 153 (of the first cam body) Lower inclined surface 154 (of the first cam body) Second vertical surface 16 (of the first cam body) Second cam body 17 Third cam body 18 Fourth cam body 21 Mounting recess 22 First guide groove 23 Second guide groove 30 socket body 31 front wall 32 left side wall 33 rear wall 34 right side wall 35 bottom wall 50 contact 50a left contact piece 51a drive piece 52a (left contact piece) curved portion 53a (left contact piece) contact Portion 54a bent portion 55a (left contact piece) elastic deformation portion 50b1 (left contact piece) first right contact piece 50b2 second right contact piece 59 terminal support members 61a, 61b terminal 62a 62b Contact fixing member 90 Cold cathode tube 91 Dimette wire (external electrode)
100 Wiring board

Claims (11)

A socket-shaped socket body having a peripheral wall and a bottom wall, the upper part being open;
A cover member having a peripheral wall and having a cylindrical shape that is open up and down, and movable between an upper first position and a lower second position in the socket body;
A contact fixed to the bottom wall of the socket body, disposed on the left and right, closed in a no-load state when viewed from the front, and having at least two contact pieces elastically deformable in the left-right direction;
With
A cam body that opens and closes the two contact pieces as the cover member moves between the first position and the second position is provided in front and / or rear of the peripheral wall of the cover member. A cold-cathode tube socket for electrically connecting a cold-cathode tube having a jimet wire as an external electrode to a wiring board.   A mounting recess is further formed in front of the peripheral wall of the cover member, and one end of the cold cathode tube is mounted on the front of the peripheral wall of the cover member. The cold cathode tube socket according to claim 1, wherein a groove is formed.   The cam body has at least a first inclined surface forming a cam surface, a first vertical surface parallel to right and left vertical surfaces of the guide groove provided in the cover member, and a second inclined surface, and has a trapezoidal cross section. The cold cathode tube socket according to claim 2, wherein the socket is formed.   The contact includes one left contact piece arranged on the left side and two right contact pieces arranged on the right side, and the left contact piece and the right contact piece are arranged symmetrically as viewed from the front and left 4. The cold cathode tube socket according to claim 3, wherein the contact pieces are alternately arranged in the front-rear direction so as to be sandwiched between the two right contact pieces.   Each contact piece constituting the contact includes an elastically deformable portion that can be elastically deformed in the left-right direction, a bent portion, a contact portion that contacts the jimet wire, a curved portion that reverses the contact piece, and a movement of the cover member. 5. The cold cathode tube socket according to claim 4, further comprising a drive piece that moves left and right along the cam surface of the cam body and opens and closes two closed contact pieces.   When the cover member is in the first position, the drive pieces of the contact pieces arranged on the left and right sides constituting the contact are located on the left and right of the lower end of the cam body of the cover member, and the cover member is 6. The cold cathode tube socket according to claim 5, wherein when it is in the second position, the cover member is configured to be positioned on the left and right of the upper end of the cam body of the cover member.   The contact includes a terminal support member that supports a terminal connected to the wiring board. The terminal support member includes a contact fixing member that fixes the contact to the socket body, and the left and right contact pieces. The cold cathode tube socket according to claim 6, wherein the socket is connected to the socket body so as to be swingable in the front-rear direction.   The peripheral wall of the cover member includes a front wall, a rear wall, and left and right side walls, and the cover member is a rectangular housing as viewed from above. Socket for cold cathode tubes.   9. The cold cathode tube socket according to claim 8, wherein the cam body is provided on a front wall and / or a rear wall of the cover member.   The cooling recess according to claim 9, wherein the placement recess is formed in the front wall of the cover member, and the guide groove is formed in the front wall and the rear wall of the cover member. Socket for cathode tube.   The peripheral wall of the socket body is composed of a front wall, a rear wall, and left and right side walls, and the socket body is a rectangular tube having a rectangular shape when viewed from above. Socket for cold cathode tubes.

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