JP2005135756A - Lamp socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correct a lamp position in a vertical condition with no possibility of spoiling lamp attaching/detaching property and the safety in attaching/detaching while suppressing cost. <P>SOLUTION: In this lamp socket wherein a socket main body 1 has a pair of insert holes 21, recessed parts 30 provided just under the insert holes, a pair of contact segments 5 arranged in the recessed parts and electrically connected with tube pins 11 of the lamp 10 inserted from the insert holes 21 and an energization member 4 which energizing the contact segments, the lamp 10 is supported detachably by pushing the tube pins 11 from the insertion hole 21 resisting to the energizing force of the energization member 4 by manual operation to be contacted with the corresponding face of the contact segment 5, the socket main body 1 is provided with a pair of mounting hole 23 from the upper surface and a pair of elastic wire members 6 mounted on the mounting hole 23 by inserting from above and arranged in nearly parallel on the upper surface of the socket main body. The pair of elastic wire members 6 abut counter parts on the opposite side face of a sealing part 10a of a lower part of the lamp to vertically corrects the position of the supported lamp 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lamp socket suitable for a lamp having a pin-shaped base (sometimes referred to as a lamp pin or the like. In the present specification, this is referred to as a “base pin”). is there.

  In the lamp socket for high output, the socket body 1 is usually composed of upper and lower halves 2 and 3 made of ceramics as illustrated in FIG. 1 to which the present invention is applied. The upper half 2 includes a recess 20 that houses a lower sealing portion 10a that projects a cap pin 11 (a pin diameter of about 0.7 to 3.2 mm) of the lamp 10 and a bottom surface of the recess 20. A pair of penetrating insertion holes 21 is formed. The hole diameter of the insertion hole 21 is larger than the pin diameter of the cap pin 11 and can be inserted with a margin. In the lower half 3, a pair of recesses 30 is defined immediately below the insertion hole 21, and the contact piece 5 and the biasing member 4 are disposed in each recess 30. The contact piece 5 is a conductive plate, and one end 12a of the lead wire 12 is connected thereto. The urging member 4 presses the contact piece 5 to maintain the contact state with the cap pin 11 and makes it possible to hold the lamp 10 with a predetermined support force. Here, the contact piece is a one-point contact that comes into contact with the base pin at one place, but there is also a two-point contact that comes into contact with two places. In the two-point contact, for example, the contact piece has a substantially V shape, and a cap pin is sandwiched between the opposing pieces. In this case, the urging member urges each facing piece of the contact piece arranged in the concave portion on the socket body side from the outside, or urges the both facing pieces by press-fitting arrangement between the winding coil parts. (Refer to Utility Model Registration No. 2603200).

  The lamp support structure is the same for the one-point contact and the two-point contact described above. In other words, the lamp 10 is configured to resist the urging force of the urging member between the contact piece 5 and the corresponding surface of the recess 30 through the insertion hole 21 or between the opposing pieces of the contact piece by manually operating the cap pin 11. It is held by being pushed in and pulled out against the urging force of the urging member 4 at the time of replacement or the like. In the conventional lamp socket, the lamp 10 may be held slightly tilted from the center line. For example, even if the lamp 10 is tilted by about 2 to 5 degrees from the center line, the contact between the cap pin and the contact piece may occur. Lights up normally. However, in terms of illumination, it is not preferable that the lamp 10 is held tilted from the center line because the lamp focus is shifted. Such a problem becomes more prominent as the light output from the lamp 10 is irradiated through the substantially hood-like reflector on the hood and the lamp output increases. Since the lamp 10 is supported by the biased contact piece via the cap pin, the lamp 10 is easily inclined along the contact piece or in a direction substantially intersecting with the biasing direction.

  As a countermeasure against the above, it is conceivable to attach a pressing piece as shown in Patent Document 1. FIG. 7 shows a lamp socket disclosed in the document 1. The socket body 50 is composed of upper and lower halves 51 and 52, which are connected by screw members (not shown) that are inserted through the upper and lower halves 51 and 52 downward and locked to a mounting plate 55 on the bottom side of the lower half. Has been. On both side walls of the upper and lower halves 51 and 52, presser pieces 60 are formed in which the portions projecting upward from the upper half 51 are formed in a dogleg shape. The holding piece 60 is a leaf spring, and is erected in a state where the lower end portion is connected to the mounting plate 55 side, and the lower sealing portion of the lamp 10 is formed by a dogleg shape protruding upward from the upper half 51. Support reinforcement. The mounting plate 55 has mounting protrusions 55a projecting to both sides, and fixes the lamp socket itself to the mounting location. Reference numerals 56 and 57 are substantially U-shaped contact pieces (contact points) arranged in the respective recesses 52 of the lower half 52 and auxiliary spring bodies fitted to the outside of the contact pieces.

JP 2003-86312 A

  The holding piece 60 is determined by the IEC standard (world standard) as necessary depending on the type of lamp (when the lamp is, for example, G12), and is pressed downward with the lamp 10 sandwiched from both sides. By doing so, the supporting force of the lamp 10 is reinforced. And the problem of the inclination of the ramp mentioned above can correct the inclined lamp posture as such by using such a pressing piece. However, when the above pressing piece is added, the following becomes a problem. First of all, from the standpoint of commercialization, the presser piece is shaped and chamfered by press molding using a metal plate material, which increases the cost, and it is desirable to avoid using a type not required by the IEC standard from the viewpoint of increasing costs. The conventional pressing piece is optimal for reinforcing and supporting the lamp with a predetermined pressing force. However, when the lamp is used for fine adjustment of the lamp posture as described above, the lamp assemblability deteriorates and the lamp can be attached and detached. It becomes a factor which impairs safety. Therefore, the object of the present invention is to significantly reduce the cost compared to the conventional presser piece, can be attached with one touch, and the lamp posture is ensured without the risk of damaging the lamp detachability and safety at the time of detachment. It is to make correction possible.

  In order to achieve the above object, the present invention provides a socket body having a pair of insertion holes for a cap pin, a recess provided immediately below each insertion hole, and each insertion hole disposed in the recess. A pair of contact pieces that are electrically connected to the base pins of the lamp inserted from the above, and a biasing member that biases the contact pieces, and the biasing pin is removed from the insertion hole by manually operating the lamp. In a lamp socket that is detachably supported by being pressed against the urging force of the contact piece to contact the corresponding surface of the contact piece, a pair of slit-shaped mounting holes in which the socket body is provided downward from the upper surface, and the respective mounting A pair of elastic wire members which are respectively attached to the holes by insertion from above, and are arranged so as to be substantially parallel to the upper surface of the socket body, and the corresponding portions of the pair of elastic wire members are connected to the cap pins The Contact with and on opposite sides of the lamp lower sealing portion out, and the base pins and said allowing posture vertically correction of the lamp which is supported in contact with the said contact piece.

  In the socket structure described above, the lamp is supported by the socket body by contacting the corresponding surface of the contact piece by pressing the cap pin through the insertion hole against the urging force of the urging member by the same manual operation as in the past. The In this lamp mounting process, the cap pin is inserted into the insertion hole at a slight angle to contact the corresponding surface of the biased contact piece, and the lamp is inclined several degrees from the center line (to the left or right side along the contact piece). It can happen to be in a state. In such a case, each elastic wire member pushes the lamp lower sealing portion from the opposite side to correct the lamp posture to be vertical. For this reason, the lamp is always supported vertically as designed regardless of the lamp mounting operation.

The present invention as described above is more preferably embodied as follows.
The socket body is made of ceramic and is divided into upper and lower halves, and the upper half has the upper slit width smaller than the lower slit width as the mounting hole, and the elastic wire member has a base end It is the structure formed in the substantially hook-shaped latching | locking part latched by the corresponding inner surface of the said attachment hole (Claim 2). In this case, the elastic wire member can be easily and reliably attached in a state where the engaging portion formed in a hook shape is hooked to the inclined end face or the step end face in the upper half side attachment hole. In the attached state, since the base end side of the elastic wire member is in the upper half body, it is not visible.
The elastic wire member has a winding portion, and the winding portion is in contact with the lamp lower sealing portion (claim 3). In this case, by applying the winding portion to the lamp lower side sealing portion, it can be set weakly as a biasing force for centering or can be stably applied. Since the winding portion does not have an acute angle portion, it is preferable from the viewpoint of safety.

In the first aspect of the present invention, as the lamp socket, the lamp posture can be corrected (centered) by the pair of elastic wire members, and can always be maintained at the designed perpendicularity. Compared to the pressing piece of FIG. 7, the elastic wire member is safe because it has a portion protruding upward substantially parallel to the upper surface of the socket body, can be implemented at low cost, and is attached to the mounting hole of the socket body. It is excellent in that it can be easily assembled because it can be attached by inserting, and that it can be easily centered by pushing the lamp from both sides, so that the urging force is kept small and the detachability of the lamp is not impaired.
-Claim 2 WHEREIN: In the above lamp socket, a socket main body is divided | segmented into an upper-lower half body, and the assembly property of an elastic wire member is improved more with the shape device of an upper half body side attachment hole and an elastic wire member side latching | locking part In addition to this, since the base end side of the elastic wire member is inserted into the mounting hole and is not exposed to the outer periphery or the bottom side of the socket body, the appearance and safety can be further improved.
In the third aspect of the present invention, since the elastic wire member abuts against the lamp lower sealing portion via the winding portion, a small pressing force necessary for finely adjusting the inclination of the lamp can be applied in an optimum state. It is possible to obtain reliability by affecting the detachability of the lamp and eliminating the acute angle portion.

  The best mode of the present invention will be described with reference to embodiments of the drawings. In the following description, the basic example shown in FIGS. 1 to 5 is described in detail, and then the modification shown in FIG. 6 is referred to. The target lamp socket is used for the 2-pin type lamp 10. The lamp 10 is a metal halide lamp or the like, and is a type in which the cap pin 11 protrudes from the lamp lower side sealing portion 10a.

(Structure) The lamp socket of the embodiment is composed of upper and lower halves 2 and 3 in which a socket body 1 is divided, and a pair of contact pieces 5 and a biasing member 4 electrically connected to a cap pin 11 and a pair of centering parts. Elastic wire member 6, mounting plate 7 arranged with a mica plate 8 a interposed on the bottom surface of lower half 3, mica plate 8 b arranged between upper and lower halves 2, 3, and upper and lower half And two screw members 9 connecting the bodies 2 and 3. The contact piece 5 has a substantially rectangular small piece shape, and a terminal 12a of the lead wire 12 is joined to one end side. The material of the contact piece 5 is copper-based, brass-based, Ni-based, stainless-based, or the like, and a material corresponding to the material of the cap pin 11 (Ni-based, brass-based, etc.) is used. The mica plates 8a and 8b are insulating plates, the mica plate 8a has a shape that approximates the shape of the lower surface of the lower half 3, and the mica plate 8b has a generally piece shape.

  The upper and lower halves 2 and 3 are made of ceramic. The upper half 2 includes a recess 20 provided in the upper center portion, a pair of insertion holes 21 penetrating the bottom surface of the recess 20, a pair of connection holes 22 penetrating the upper and lower surfaces, and a pair of mounting holes. 23, a pair of fitting portions 24 that lacks the lower peripheral facing portion and communicates with the recess 20, a recess portion 25 provided in the center of the lower surface, and each connection hole 22 on the lower surface. It has a fitting hole 26 provided close to it. Here, the recess 20 is sized to accommodate the lower part of the lamp lower sealing part 10a, and both side parts 20a are formed wider than the intermediate part 20b in correspondence with the shape of the sealing part 10a. Yes. Each insertion hole 21 is a rectangular hole, the upper edge of the hole is formed in a tapered portion, and the cap pin 11 is inserted from the tapered portion with a margin. Each connecting hole 22 is provided at a position separated on both sides of the recess 20, and the upper side is a large-diameter hole that accommodates the head of the screw member 9 (see FIG. 4B). Each mounting hole 23 is a slit-shaped hole and is provided substantially in parallel on both sides of the recess 20. The upper slit width opened on the upper surface of the upper half 2 is formed smaller than the lower slit width opened on the lower surface of the upper half 2 (see FIG. 4C). Each mounting hole 23 is a portion to which the elastic wire member 6 is attached, and is formed as an inclined surface with both inner end surfaces projecting from the bottom to the top, but the lower side is formed with a stepped end surface that is depressed from the upper side. May be.

  As shown in FIGS. 2 and 3, the elastic wire member 6 includes a base end side locking portion 6a, an inclined portion 6b bent obliquely upward from the locking portion 6a, and a horizontal direction from the inclined portion 6b. The extending winding portion 6c is integrally formed. The locking portion 6a has a hook shape that is press-fitted into the slit-shaped mounting hole 23, and the end that is bent upward from the lowermost portion and extends upward is locked to the inclined surface or step end surface of the mounting hole 23 described above. Is set to The inclined portion 6b is on the upper surface of the socket body 1 (or the upper half 2) and extends to one side of the mounting hole 23, that is, around the upper surface. The winding portion 6 c is arranged so as to be substantially parallel to the upper surface of the socket main body 1 and along the side portion 20 a of the recess 20 around the upper surface. Further, the winding portion 6c is arranged so as to be substantially parallel to a biasing direction of a biasing member 4 to be described later, and substantially intersects with the left and right extension lines of the contact piece 5.

  The lower half 3 is provided with a recess 30 provided directly below each communication hole 21, a connection hole 32 communicated with each connection hole 22, and protrudes around the upper surface to be engaged with each fitting hole 24. A protrusion 34, a small protrusion 35 provided at the center of the upper surface and engaged with the recess 25, and a fitting provided on the upper surface close to each connection hole 32 and facing the fitting hole 26 And a hole 36. Here, each recess 30 is provided as a substantially rectangular hole between the small protrusion 35 and the left protrusion 34 and between the small protrusion 35 and the right protrusion 34. Each recess 30 communicates with a guide groove 33 for a lead wire provided between the corresponding protrusion 34 and extending to the outer peripheral side, and an inner wall located on the inlet side of the guide groove 33 among the inner walls And a longitudinal groove 30a extending from the upper surface to the inner bottom surface (see FIG. 5B). The vertical groove 30 a has a substantially semi-cylindrical shape with an upper edge formed in a tapered portion, and positions the cap pin 11 inserted between the contact piece 5. Each fitting hole 36 is provided in a state penetrating vertically, and the mica plate 8 b is inserted from the lower surface side of the lower half 3.

(Assembly) In the lower half 3 described above, first, the urging member 4 and the contact piece 5 are incorporated in each recess 30. In this case, the contact piece 5 is disposed in the recess 30 in a state where the lead wire 12 is drawn from the guide groove 33 to the outer peripheral side. The urging member 4 uses a coil spring and is disposed between the contact piece 5 and the corresponding inner surface of the recess 30 in a state where the contact piece 5 in the recess 30 is positioned toward the longitudinal groove 30a. In addition, about the detailed shape of the above recessed part 30 and the contact piece 5, arrangement | positioning of the biasing member 4, etc. can be changed suitably, For example, the type described in Japanese Patent Application No. 2002-187427 may be sufficient.

  Next, in the lower half 3, the mica plate 8 b is inserted into each fitting hole 36 from the lower surface side, and the mica plate 8 a and the mounting plate 7 are disposed on the lower surface. The mounting plate 7 has screw holes 7a corresponding to the connecting holes 22 and 32, and screw holes 7b for mounting the lamp socket to the mounting location (see FIG. 3B). Then, the mica plate 8 b is inserted into the fitting hole 36 in a state where the mica plate 8 b is in contact with the lower surface of the lower half 3, and is disposed so as to protrude above the lower half 3. The mounting plate 7 is positioned and arranged on the lower surface of the lower half 3 with the mica plate 8a mounted inside. Thereafter, the upper half 2 is overlaid on the lower half 3. At that time, the upper protruding portion of the mica plate 8b is inserted into the fitting hole 26, the fitting hole 24 is engaged with the protrusion 34, and the recess 25 is engaged with the small protrusion 35, respectively. The upper and lower halves 2 and 3 are connected by the screw member 9 being inserted into the connecting hole 22 and the connecting hole 32 from above and being locked to the screw hole 7 a of the mounting plate 7. And the elastic wire member 6 is each attached to the above-mentioned lamp socket by the insertion operation from the top to each attachment hole 23 as mentioned above. In the attached state, the winding part 6c of each elastic wire member 6 is arranged in a state of facing the side part 20a of the recess 20. Of course, the elastic wire member 6 can be attached to the upper half 2 in advance before the upper and lower halves 2 and 3 are connected.

(Operation) In the assembled lamp socket, the lamp 10 is pushed into the gap between the longitudinal groove 30a and the contact piece 5 from the recess 20 and the insertion hole 21 into the base pin 11, and is brought into contact with the corresponding surface of the contact piece 5. It is supported by a force corresponding to the urging force of the urging member 4 in an electrically connected state. This lamp mounting operation is performed manually by a human. For this reason, in the conventional product, the lamp 10 may be tilted in the range of the play dimension set between the base pin 11 and the insertion hole 21. However, in the lamp socket of the present invention, when the cap pin 11 is pushed into the gap between the vertical groove 30a and the contact piece 5 and released in the lamp mounting operation process, the winding portion 6c of the elastic wire member 6 on both sides is released. Is centered by a small biasing force against the corresponding side surface of the lamp lower side sealing portion 10a, and the inclination of the lamp 10 is corrected by the centering action. That is, in this socket structure, the lamp 10 can be supported while maintaining the design verticality via the elastic wire member 6 without being affected by the mounting operation, and thereby the lamp focus is positioned as designed at the time of illumination. It is irradiated. Further, since such an elastic wire member 6 makes the winding portion 6c lightly contact the lamp lower sealing portion 10a, there is no possibility that the detachability of the lamp 10 is impaired.

(Modification) The modification of FIG. 6 is an example in which the elastic wire member 6 is changed, and other than that is the same as the above embodiment. For this reason, in this description, the same members and parts as those in FIGS. That is, the elastic wire member 6A is bent in the same manner as in the above embodiment, the locking portion 6a and the inclined portion 6b, the outer line portion 6d extending in the horizontal direction from the inclined portion 6b, and the outer line portion 6d to the inclined portion 6b side. The extension portion 6e is integrally formed. The locking portion 6 a has a hook shape that is press-fitted into the slit-shaped mounting hole 23, and is locked to the inclined surface or the step end surface of the mounting hole 23. The inclined portion 6b is on the upper surface of the socket body 1 and extends to one side of the mounting hole 23, that is, around the upper surface. The outer wire portion 6d and the inner wire portion 6e are substantially parallel to the upper surface of the socket body 1 in the same manner as the winding portion 6c of the above embodiment, and are located around the upper surface and along the side portion 20a of the recess 20. Has been placed. The extension portion 6e has a loose arc shape, and makes light contact with the corresponding portion of the lamp lower side sealing portion 10a so that the lamp 10 can be centered in the same manner as the winding portion 6c. Thus, the elastic wire members 6 and 6A of the present invention can be changed within a range that satisfies the requirements specified in claim 1.

It is sectional drawing which shows the lamp socket of invention Example in a lamp support state. It is a block diagram which shows the relationship between the lamp socket of FIG. 1, and an elastic wire member. It is the figure seen from the upper and lower sides and the side of the lamp socket of FIG. FIG. 4 is a cross-sectional view taken along line AA, BB, and CC in FIG. It is sectional drawing along the DD line and EE line of FIG.3 (c). It is a figure which shows the modification of the said elastic wire member corresponding to FIG. 3 (a), (c). It is the side view which shows the lamp socket of patent document 1, and the FF sectional view taken on the line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Socket body 2 ... Upper half (20 is a recess, 21 is an insertion hole, 23 is a mounting hole)
3 ... Lower half (30 is a recess)
4 ... biasing member 5 ... contact piece 6, 6A ... elastic wire member (6a is a locking part, 6c is a winding part)
10: Lamp (10a is a lower sealing portion)
11 ... Cap pin 12 ... Lead wire

Claims (3)

The socket body is electrically connected to the pair of insertion holes for the base pins, the concave portions provided directly below the respective insertion holes, and the base pins of the lamps respectively disposed in the concave portions and inserted from the respective insertion holes. A pair of contact pieces and a biasing member that biases the contact pieces, and by manually operating the lamp, the cap pin is pushed through the insertion hole against the biasing force of the biasing member. In the lamp socket that is detachably supported by contacting the corresponding surface of the contact piece,
A pair of slit-shaped mounting holes provided downward from the top surface and the pair of socket body mounted by being inserted into the mounting holes from above and arranged substantially parallel to the top surface of the socket body. Having an elastic wire member of
The posture of the lamp supported in a state in which the corresponding portion of the pair of elastic wire members is in contact with the opposite side surface of the lamp lower sealing portion protruding from the base pin, and the base pin is in contact with the contact piece. A lamp socket characterized in that it can be straightened vertically.   The socket body is made of ceramic and is divided into upper and lower halves, the upper half is formed as the mounting hole with an upper slit width smaller than the lower slit width, and the elastic wire member has a base end that is The lamp socket according to claim 1, wherein the lamp socket is formed in a substantially hook-shaped locking portion that is locked to a corresponding inner surface of the mounting hole. The lamp socket according to claim 1 or 2, wherein the elastic wire member has a winding portion, and the winding portion abuts on the lamp lower sealing portion.

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