JPH0616435Y2 - Socket for discharge lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a discharge lamp socket provided with a base having a pair of terminals protruding from its side surface.

2. Description of the Related Art The base of a straight tube discharge lamp used as a light source for illuminating documents in office machines such as facsimiles, dry-type copying machines, and OCRs (optical character readers) is generally one in which a base pin is projected in the axial direction. However, such a discharge lamp has a long overall length because the base pin projects at both ends, which is one factor that makes it difficult to downsize the office machine. Therefore,
Recently, as the discharge lamp for the above-mentioned use, for example, FIGS.
As shown in the drawing (see Japanese Utility Model Laid-Open No. 60-51864), terminals (2) and (2) extending in the axial direction are provided at two positions on the side surface at 180 ° intervals at both ends of the straight pipe type valve (1). Discharge lamps (4) having a shorter overall length by fixing the base (3) which is fixed by protruding tend to be prized.

Such a discharge lamp is supported by a socket attached to the base, electrically connected and attached to an office machine,
As a socket of this type of discharge lamp, there is one having a structure in which a base (3) is inserted from a direction orthogonal to its axial direction. An example of the socket will be described with reference to FIGS. 13 and 14, and in FIG. (5) is a resin socket main body, (6) is a resin socket back plate, (7) (7) ... is a plurality of screws or caulks for fixing the socket back plate (6) to the rear surface of the socket body (5). It is a pin for.

The socket body (5) is substantially Y-shaped, and the upper side parts (5a) (5a) of the socket body (5) have a pair of contact pieces (8) (8) from the rear surface.
Is inserted and temporarily fixed, and a mounting hole (9) is formed in the lower portion (5b) of the socket body (5). Opening (10) between opposite sides (5a) (5a) of the socket body (5)
Has a width W slightly larger than the diameter of the base (3), and the contact pieces (8) (8) are elastically deformable on both sides of the opening (10). After inserting the contact pieces (8) (8) into the socket body (5), the socket back plate (6) is fixed to the rear surface of the socket body (5) to prevent the contact pieces (8) (8) from coming off. To be done.

The base (3) of the discharge lamp (4) is inserted into the socket (11) as follows. Opening of socket body (5) (1
Insert the base (3) into the opening (10) into the opening (10) as shown by the chain line arc arrow in FIG. The base (3) is rotated by 90 ° with, and the terminals (2) and (2) are pressed against the substantially central portions of the contact pieces (8) and (8). As a result, the contact pieces (8) (8) are elastically contacted with the terminals to electrically connect the base (3) in the socket (11) and mechanically support it.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the socket (11) into which the base (3) is inserted in a direction orthogonal to the axial direction, a part of the side surface of the opening (10) of the base (3) 10 ')
Further, the contact piece (8) with the base (3) in the opening (10)
Since the terminals (2) and (2) are elastically clamped and held by the (8), holding of the base (3) in the opening (10) is likely to be unstable, and the opening (10) is likely to become unstable. ), The base (3) is rotated by external force or vibration, and the terminals (2) and (2) contact the contact piece (8).
There was a problem that the base (3) came off from the base (8) and jumped out of the base entrance (10 ') of the opening (10).

In addition, downsizing of office machines such as facsimiles has been promoted in recent years, and it has been required to reduce the space for disposing the discharge lamp. Despite this, Shokai 6
The assembling of the discharge lamp disclosed in JP-A No. 0-51864 and Japanese Utility Model Laid-Open No. 60-130548 into a device is configured to be inserted into a socket from a direction perpendicular to the axial direction of the discharge lamp.

Therefore, a space for at least one discharge lamp is required on the outer periphery between the sockets, which not only hinders downsizing of the device but also makes mounting the discharge lamp extremely troublesome.

Therefore, an object of the present invention is to provide a socket in which a discharge lamp equipped with a base having a terminal on a side surface can be easily incorporated into a device having a restricted mounting space.

Therefore, according to the present invention, in order to achieve the above-mentioned object, the base of a discharge lamp in which a base having a pair of terminals protruding from the side surface is fixed to the end of a straight tube bulb is provided. A socket that is inserted from the axial direction, has a bottomed, substantially tubular shape that opens only on the front side, and a cap housing space that receives the cap from the axial center of the discharge lamp in the center of the front opening, and the cap housing A socket main body having a pair of contact pieces arranged on both sides of the space and contacting the terminals of the base, and an opening at a portion corresponding to the base storage space of the socket main body and arranged on the front side of the socket main body. A substantially ring-shaped socket cover having a notch-shaped terminal insertion guide portion through which the terminal of the base is inserted at a portion corresponding to the pair of contact pieces, the socket cover having a substantially ring shape. The inner diameter is the outer diameter of the base URN is characterized in that the set to the same.

Action The socket of the present invention has a structure in which the base is axially inserted into the opening at the center of the front surface of the socket. Therefore, the base inserted into the opening does not come out of the socket unless it is pulled out in the opposite direction. Further, the insertion guide portion of the mouthpiece terminal provided in the opening portion of the socket has the effect of improving the operability of inserting the mouthpiece into the opening portion and reducing the inner diameter of the opening portion to a limit close to the outer diameter of the mouthpiece. Realizes miniaturization of socket.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 10. The drawing illustrates a socket (12) mounted on the base (3) of the discharge lamp (4), and FIG. 1 is a front view of the front surface of the socket into which the base (3) is axially inserted. is there.

In the socket (12) shown in FIGS. 1 to 3, (13) is a bottomed, generally cylindrical shape having an opening only on the front side, and a base (3) is provided in the center of the front opening only in the axial direction of the discharge lamp. A socket body having a receiving space for receiving, (14) and (14) are a pair of contact pieces inserted from the front opening into the socket body (13), and (15) is fitted to the front opening end of the socket body (13). With the substantially ring-shaped socket cover, a circular mouthpiece insertion opening (16) is formed in the center of the socket cover (15). A guide part (17) for inserting the base terminal, which is cut out in, for example, a semicircle, at two locations on both sides of the opening (16).
(17) is formed. The socket body (13) and the socket cover (15) are formed of phenol resin, polycarbonate resin or the like, and the contact pieces (14) (14) are formed of a metal plate having a spring property such as phosphor bronze. A pair of contact pieces (14)
(14) are arranged on both sides of the socket body (13), and substantially central portions (14a) (14a) thereof are formed in an arc shape in cross section and located at positions along the guide portions (17) (17). Is installed.

The socket body (13) and the socket cover (15) have a one-touch fitting structure.
A specific example of 3) will be described with reference to FIGS. 4 and 5.
(13a) is a bottom plate having a semicircular upper part and a rectangular lower part, (13a)
b) is a side plate part along the upper side and both sides of the bottom plate part (13a),
(13c) is a socket mounting extension extending downward from the center of the lower side of the bottom plate (13a), and (13d) and (13e) are contact piece supports integrally formed on the upper and lower inner surfaces of the bottom plate (13a). It is a department. A notch (18) is formed in the arcuate upper portion of the side plate portion (13b) in the axial direction, and a socket cover engaging member is provided at the rear end portion of the outer peripheral surface of the upper contact piece support portion (13d) exposed in the notch (18). A combined step (19) is formed. The socket cover (15) is located at the center of the upper and lower contact piece support portions (13d) (13e).
Forming an arc along the circular opening (16), and the upper ends (14b) (14b) of the pair of contact pieces (14) (14) are fitted and inserted into both ends of the upper contact piece support portion (13d). Slit (20) (2
0) is formed, and the lower end portions (14c) (14c) of the pair of contact pieces (14) (14) bent in an L shape are fitted and inserted into both ends of the lower contact support portion (13e). L-shaped slit (21)
(21) is formed. A socket cover engaging projection (22) protruding downward is integrally formed at a lower central portion which forms a boundary with the extending portion (13c) of the lower contact piece support portion (13e). In addition, the socket mounting hole (2
3) is formed.

Next, the socket cover (15) will be described with reference to FIGS. 6 to 8. Socket cover (15) is the socket body (13)
Cover body (15a) fitted to the front surfaces of the side plate portion (13b) and the contact piece support portion (13d) of the socket, and the cover extension fitted to the front surface of the extension portion (13c) of the socket body (13). Part (15b)
And a tongue piece (15c) integrally extending rearward from the center of the outer periphery of the cover body (15a) and fitted into the notch (18) on the outer periphery of the upper portion of the socket body (13). The tongue portion (15c) has a plate thickness that is elastically deformable, and the locking claw (24) is integrally provided at the center of the lower surface of the tip portion. This locking claw (2
4) shows the tongue piece (15c) in the notch (1
When fitted in 8), it is locked in the step (19) in the notch (18) to fix the upper part of the socket cover (15) to the upper part of the socket body (13). A locking claw (25) is also integrally projectingly provided in the center of the upper surface of the cover extending part (15b), and the locking claw (25) connects the cover extending part (15b) to the socket body extending part (13c). Over the projection (22) when stacking on
a) Locked at the rear end, so that the socket cover (15)
The lower part of is fixed to the lower part of the socket body (13). still,
Reference numeral (26) is a socket mounting hole formed in the cover extending portion (15b), and reference numerals (27) and (28) are a die removing hole and a groove for the locking claws (24) and (25).

As shown in FIG. 1, the pair of contact pieces (14) and (14) arranged ahead of the socket cover (15) in the socket body (13) have a tongue end (14c) (14c). The tip ends of the wiring cords (29) (29) are previously connected and fixed with solder (30) (30) or the like. The pair of contact pieces (14) (14) are located on both sides of the socket body (13), and the upper ends (14b) (14b) are inside the slits (20) (20) of the upper contact piece support portion (13d). Arranged in an elastically deformed state so as to elastically contact the wall surface, and after the contact pieces (14) (14) are inserted, the socket cover (15) is fitted to the socket body (13) in a one-touch manner. Guide part (17) of the opening (16) of this socket cover (15)
Looking from (17), the central part (14a) of the contact piece (14) (14)
Socket cover side ends (14d) and (14d) of (14a)
As shown in FIG. 2 and FIG. 3, it is bent outward in a curved shape in cross section, and the tips of the curved end portions (14d) (14d) have guide portions (17) (17) of the socket cover (15). The base terminals (2) and (2) can be smoothly inserted from the guide portions (17) and (17) into the central portions (14a) and (14a) of the contact pieces at a position that is a little hidden from.

That is, the socket (12) is the base (3) of the discharge lamp (4).
Then, it is installed as follows. First, as shown in FIG.
The base (3) of the discharge lamp (4) is placed in front of the opening (16) of the socket (12), and the pair of guide portions (17) of the opening (16).
The terminals (2) and (2) of the base (3) are arranged to face (17). Then, for example, the socket (12) is advanced toward the base (3), and the guide (17) (17) is connected to the terminal (2).
Fit the tip of (2) and insert the socket (12) into the base (3).
Push into. Then, guided by the guide portions (17) (17), the base (3) is axially inserted into the socket (12) as shown in FIG. 10, and at this time, the tips of the terminals (2) (2) are Central part (14a) (14a) by sliding the curved end parts (14d) (14d) of the central parts (14a) (14a) of the contact pieces (14) (14)
As a result, the terminals (2) and (2) are smoothly inserted. Further, the terminals (2) and (2) are inserted by pushing out the central portions (14a) and (14a) of the contact pieces (14) and (14), and as a result, the cap (12) inserted into the socket (12) ( 3), the terminals (2) and (2) are elastically clamped by the contact pieces (14) and (14) to be stably held, and the terminals (2)
(2) is the center portion (14) of the contact pieces (14) (14)
By being fitted in a) (14a), rotation of the base (3) with respect to the socket (12) in the circumferential direction is prevented.

According to the present invention, when the base of the discharge lamp is axially inserted into the opening at the center of the front surface of the socket, the guide portion of the opening guides the insertion of the terminal on the side of the base to insert the base. Easy,
It is possible to provide a socket that is accurately fitted and has excellent operability in attaching and detaching the discharge lamp to the base. Further, since the base inserted into the opening at the center of the front surface of the socket cannot be removed from the socket unless it is removed in the axial direction, the base is prevented from falling off and the reliability after mounting the socket is improved. Furthermore, by providing a base terminal insertion guide part in the opening of the socket,
The inner diameter of the opening can be reduced to the outer diameter of the base,
This facilitates miniaturization of the socket.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a socket according to the present invention, FIGS. 2 and 3 are sectional views taken along the lines AA and BB of FIG. 1, and FIG. FIG. 5 is a front view of the socket body, which is one component of the socket shown in FIG. 5, and FIG. 5 is CC of FIG.
6 is a sectional view taken along the line, FIG. 6 is a front view of a socket cover which is a component of the socket of FIG. 1, and FIG. 7 is D of FIG.
Fig. 8 is a sectional view taken along line D, Fig. 8 is an exploded perspective view of the socket shown in Fig. 1, and Figs. 9 and 10 are partial sectional views for explaining mounting of the socket shown in Fig. 1 in a discharge lamp. It is a top view including before mounting and after mounting. 11 and 12 are a plan view and a front view of the discharge lamp, FIGS. 13 and 14 are for explaining a conventional example of the discharge lamp socket of FIG. 11, and FIG. 13 is a front view of the socket. FIG. 14 is a side view of the socket including a partial cross section. (1) …… Valve, (2) …… Terminal, (3) …… Base, (4) …… Discharge lamp, (12) …… Socket, (14) …… Contact piece, (16) …… Opening Part, (17) …… Guide part.

Claims (1)

[Scope of utility model registration request] 1. A socket in which a base of a discharge lamp, in which a base having a pair of terminals protruding from the side surface is fixed to an end of a straight tube bulb, is inserted axially, and which has an opening only on the front side. A base having a substantially cylindrical shape, a base housing space for receiving the base only in the axial direction of the discharge lamp at the center of the front opening, and a pair of contact pieces arranged on both sides of the base housing space for contacting the terminals of the base. And a substantially ring-shaped socket body arranged on the front side of the socket body having an opening in a portion corresponding to the mouthpiece storage space of the socket body, and the opening corresponding to the pair of contact pieces. A socket cover formed with a notched terminal insertion guide part through which the terminal of the base is inserted, and the inner diameter of the opening is set to be substantially the same as the outer diameter of the base. Socket for electric light.