JP2000058214A - Bulb socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce bulb insertion force independent of the dispersion in thickness of a base part and sufficiently keep the contact pressure of a contact piece. SOLUTION: A plus terminal is mounted on in a right region within a base insertion hole and a minus terminal is mounted on in the left region. In the plus terminal 15B, a base plate 16 in which a contact piece 17 and a lock piece 18 are installed is inserted along a guide surface 42B. A blank surface 51 is recessed in the position outside the lock piece 18 on the guide surface 42B. When a thick base part is inserted, the bending amount to the outside of the lock piece is increased, a part where the lock piece 18 is installed out of the base plate 16 is retracted on the blank surface 51 side, and at the same time, the base part 3 is inserted, to suppress inserting resistance. With retraction of the base plate 16 to the lock piece 18 installation side, the base plate 16 on the contact piece installation side is projected inside, and the contact piece 17 comes in contact with a corresponding contact at high contact pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a socket for a wedge-based valve.

[0002]

2. Description of the Related Art A general structure of a valve socket of this type is, for example, as described in Japanese Utility Model Laid-Open No. 2-77783, in which an insertion hole into which a base portion of a wedge base valve is inserted and a base portion are provided. A pair of terminal fittings are provided in such a manner that a contact piece that elastically contacts the provided contact and a locking piece that elastically locks rearward in the insertion direction of the projection provided on the base portion are arranged side by side. It is installed. When the base portion of the valve is inserted into the insertion hole, the locking piece is pushed out while being spread outward by the projection. When the locking piece is inserted to a predetermined position, the locking piece is restored and deformed to the rear in the insertion direction of the projection. By resiliently locking to the side, the valve is held in a retaining state, and the contact piece elastically contacts the contact.

[0003]

However, since the wedge base valve is made of glass including the base portion, it is difficult to obtain dimensional accuracy. For example, the thickness of the base portion tends to vary. Therefore, when a thick base portion is inserted, the resistance received from the locking piece is particularly large and a large insertion force is required, and in some cases, the valve may be chipped or cracked.

[0004] As a workaround for the above-mentioned problem, for example, it is conceivable to make the wall surface of the insertion hole outward and to release the locking piece to the outside. The integrally formed contact piece also escapes to the outside, and the contact pressure on the contact may be insufficient, so that it cannot be easily adopted. The present invention has been completed on the basis of the above-described circumstances, and its purpose is to suppress the insertion force of the valve to a small one irrespective of the variation in the thickness of the base portion and to sufficiently increase the contact pressure of the contact piece. To be able to take it.

[0005]

According to a first aspect of the present invention, there is provided a wedge base valve, wherein a base portion of the wedge base valve is provided with a contact provided in the base portion. A contact piece elastically contacting a contact piece and a locking piece elastically locking on a rear side in a direction of insertion of a projection provided on the base portion are attached, and A configuration in which a wall surface of the insertion hole located outside the contact piece and the locking piece is formed in a stepped shape in which a portion corresponding to the locking piece is retracted outside of a portion corresponding to the contact piece. It is characterized by

According to a second aspect of the present invention, in the first aspect of the present invention, the contact piece and the locking piece are formed side by side by being cut and raised from a single substrate, and the substrate is provided with the insertion hole. Can be mounted along the wall surface, and this wall surface is characterized in that only the portion corresponding to the formation portion of the locking piece is formed in a stepped shape that is recessed outward.

[0007]

<Operation and effect of the invention><Invention of claim 1> When a thick base portion is inserted, the amount of bending deformation to the outside of the locking piece becomes large, but it corresponds to the outside of the locking piece. Since the wall surface of the insertion hole is formed by being retracted outward, the locking piece is released and the insertion resistance can be reduced. When the locking piece is released to the outside, the contact piece protrudes inward with the step portion of the wall as a fulcrum, and can contact the contact with a large contact pressure. That is, a low insertion force can be realized irrespective of the variation in the thickness of the base portion, and the contact pressure of the contact piece can be sufficiently obtained.

<Invention of Claim 2> When a thick base portion is inserted, the side of the substrate on which the locking piece is formed is released to the outside, thereby reducing insertion resistance. On the other hand, the side of the substrate on which the contact piece is formed protrudes inward with the step portion of the wall as a fulcrum, and the contact piece contacts the contact with a large contact pressure.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. In the present embodiment, a valve socket to which a double ball type wedge base valve 1 (hereinafter, simply referred to as a valve) is attached is exemplified. The bulb 1 is made of glass and, as shown in FIGS. 1 and 2, has a shape in which a flat base portion 3 is continuously provided at a lower end side of a hollow light emitting portion 2 having a substantially cylindrical shape. Two filaments 4 are provided in the light emitting section 2, and a total of four lead wires 5 connected to both ends of each filament 4 are pulled out from the bottom surface of the base section 3, and two filaments are each connected to the base. The contact 3 is folded back so as to be arranged alternately and symmetrically on both the front and back surfaces of the portion 3 to form four contacts 6A to 6D.

At the approximate center height position on the front and back surfaces of the base part 3, three projections 7 in the width direction are formed side by side so as to sandwich the formation portions of the contacts 6A to 6D. These projections 7 are also formed at symmetrical positions on both the front and back surfaces, and mainly the projections at the center portions on the front and back are retaining protrusions 7A,
Functions as 7B. Note that, among the other projections 7, the projection located on the near side of the back surface in FIG. 1 is denoted by reference numeral 7C.

The valve socket has a structure shown in FIGS. As shown in FIG. 3, the valve socket has a socket body 11 made of a synthetic resin, and has a substantially rectangular cylindrical shape on one end side (upper side) into which the base portion 3 of the valve 1 can be inserted. A base insertion hole 12 is formed, and a connector portion 13 to be connected to a mating connector (not shown) is provided on the other end side.

In the base insertion hole 12, two positive terminal fittings 15 (hereinafter referred to as plus terminals) and one negative terminal fitting 25 (hereinafter referred to as minus terminals) are mounted. It has become. Plus terminal 15
Is formed in the shape shown in FIGS.
Are provided. The positive terminal 15 has a substrate 16 having a substantially rectangular shape. A contact piece 17 is formed on one side in the width direction of the substrate 16, and a locking piece 18 is formed on the other side by cutting and raising the inside. I have. The contact piece 17 extends obliquely downward, the extended end is bent in a mountain shape, and the top of the mountain can contact the contacts 6A and 6B of the base portion 3.

As shown in FIG. 10, the locking pieces 18 are sequentially bent inward, upward and inward at substantially right angles, and finally bent outward and obliquely upward with roundness. The bent portion 19 can be locked at a position above the retaining protrusion 7A or the protrusion 7C of the base portion 3. Substrate 1
From the lower edge of 6, a tab 21 is formed downward via a connecting portion 20 projecting obliquely downward. Also, the substrate 16
An outer lance 22 is provided at the lower end of the
However, inward lances 23 are formed at both ends.

One negative terminal 25 is formed in the shape shown in FIG. The negative terminal 25 includes a contact piece 17 and a locking piece 18 similarly to the positive terminal 15 described above.
Are formed integrally with each other in the width direction, and an extension piece 26 extending upward so as to face the substrate 16 is integrally formed. A piece 17A is formed. Also,
A positive terminal 15 is provided between the substrate 16 and the extension piece 26.
A tab 21A slightly wider than the side is formed downward.

Returning to the description of the base insertion hole 12, the bottom wall of the base insertion hole 12 has a tab 2 of the plus terminal 15 on its center line in the width direction as shown in FIG.
One insertion hole 40 and the tab 21 of the minus terminal 25
A total of three insertion holes 41 of A are opened at intervals.

The plus terminal 15 is mounted in the base insertion hole 12 on the right side in FIG. 4 so that a pair thereof is vertically opposed in the figure, and the minus terminal 25 is mounted on the left side region. In the area on the right side of the base insertion hole 12,
Opposite wall surfaces (upper and lower wall surfaces in FIG. 4) are
Guide surface 42 for slidingly contacting the outer surfaces of substrates 16 of 5A and 15B
A, 42B, and a lance insertion groove 43 in the vertical direction that allows the outward lance 22 to be inserted is formed at a substantially central position in the width direction of each guide surface 42A, 42B, as shown in FIG. A locking projection 44 is provided at an intermediate position.

Therefore, as shown in FIG. 12, one of the plus terminals 15A is provided with the tab 21 in the insertion hole 40 at the center of FIG.
, The board 16 is inserted along the lower guide surface 42A in the figure, and when a predetermined amount is inserted, the outward lance 22 is locked to the lower side of the locking projection 44 so that the board 16 cannot be removed. Attached to. The two inward lances 23 are flatly elastically deformed and press-fit into the corresponding press-fit grooves 46 (see FIG. 4).

As shown in FIG. 13, the other plus terminal 15B is inserted so that the tab 21 is inserted into the insertion hole 40 on the right side in FIG. 13 and the substrate 16 is aligned with the upper guide surface 42B in FIG. When a predetermined amount is inserted, the outward lance 22 is similarly locked below the locking projection 44, and the inward lance 23 is press-fitted into the press-fitting groove 46, and is mounted in a retaining state. . Tabs 21 of both plus terminals 15A, 15B protrude into connector portion 13 by a predetermined amount.

In the region on the left side of the base insertion hole 12 in FIG. 4, the upper wall surface in FIG.
6, a lance insertion groove 43 is formed in the same manner, and an extension piece insertion groove 48 is formed vertically on the lower wall surface in FIG. Therefore, although not shown, the minus terminal 25 has its tab 21A aligned with the insertion hole 41 on the left side of FIG. 4, the substrate 16 is aligned with the guide surface 42C, and the extension piece 26 is aligned with the extension piece insertion groove 48. Similarly, the outward lance 22 is locked below the locking projection 44, and the inward lance 23 is press-fitted into the press-fitting groove 46 to be mounted in a retaining state.
The tab 21 projects into the connector portion 13 along with the tab 21 of the plus terminal 15.

As described above, the two plus terminals 15A, 1
When 5B and the minus terminal 25 are mounted, the contact piece 17 of the plus terminal 15A shown in FIG. 12 can contact the contact 6A of the bulb 1, and the locking piece 18 can be locked to the retaining projection 7A, Further, the contact piece 17 of the plus terminal 15B shown in FIG.
C can be locked. Further, the contact pieces 17 and 17A of the minus terminal 25 facing each other can contact the contacts 6C and 6D, and the locking piece 18 can be locked to the retaining projection 7B.

In this embodiment, a guide surface 42A (FIG. 1) for inserting and guiding the substrate 16 of one plus terminal 15A is provided.
2), the lance insertion groove 43
As shown in FIG. 14, a surface corresponding to the side of the locking piece 18 sandwiching the is formed as a relief surface 50 recessed outward by a predetermined dimension. In other words, the substrate 16 of the one plus terminal 15A
The guide surface 42A is formed in a stepped shape in which the side corresponding to the locking piece 18 is retracted outward.

The substrate 16 of the other plus terminal 15B
13, the surface corresponding to the locking piece 18 sandwiching the lance insertion groove 43 is also depressed outward by a predetermined dimension, as shown in FIG. A relief surface 51 is provided. That is, similarly, the guide surface 42B of the substrate 16 of the other plus terminal 15B is formed in a stepped shape in which the side corresponding to the locking piece 18 is retracted outward.

The present embodiment has the above structure,
Subsequently, the operation will be described. In the base insertion hole 12 of the socket body 11, two plus terminals 15A and 15B and one minus terminal 25 are mounted in the manner described above. Subsequently, the base portion 3 of the bulb 1 is inserted into the base insertion hole 12 in which the terminal fittings 15A, 15B, 25 are mounted. Then, the retaining projections 7A on both sides of the base portion 3,
7B comes into contact with the locking piece 18 of the one plus terminal 15A and the locking piece 18 of the minus terminal 25, and is pushed in while flexing and deforming them outward. When the locking piece 18 moves inward beyond the bent portion 19, the bent portion 19 moves to the
Lock on the upper surface of 7B. Also, the other plus terminal 15B
The locking piece 18 also rides over the projection 7C and locks on the upper surface thereof. As a result, the base portion 3, that is, the valve 1 is mounted in a retaining state, and the terminal fittings 15A, 15B, 2
The five contact pieces 17, 17A elastically contact the corresponding contacts 6A to 6D of the base portion 3.

Incidentally, the dimensional accuracy of the valve 1 is difficult to obtain, and for example, the thickness of the base portion 3 tends to vary. Therefore, when the thick base portion 3 is inserted, the amount of outward bending of the locking piece 18 becomes larger. However, the guide surfaces 42A, 42 of the plus terminals 15A, 15B
Since relief surfaces 50 and 51 are formed on B at the sides corresponding to the locking pieces 18, respectively, the relief surfaces 50 and 51 are formed.
As shown by the solid line, the base portion 3 is inserted while the portion of the substrate 16 where the locking pieces 18 are formed is released to the release surface 51 side. Thereby, even if the thickness of the base portion 3 is large, the insertion resistance received from the locking piece 18 can be suppressed to a small value.

When the locking piece 18 is locked on the upper surface side of the projection 7C, the substrate 16 on the side where the locking piece 18 is provided is provided.
15, the substrate 16 provided with the contact piece 17 protrudes inward with the one side edge 43A of the lance insertion groove 43 as a fulcrum, as shown in FIG. The piece 17 contacts the contact 6B with a large contact pressure.

Similarly, the other plus terminal 15A
When the base portion 3 having a large thickness is inserted also on the side, the substrate 16 on which the locking pieces 18 are provided escapes to the escape surface 50 side, which is the lower side in FIG. . Further, when the locking piece 18 is locked to the retaining projection 7A, the contact piece 17 is provided as shown by the arrow in FIG. The other side of the substrate 16 projects inward, and the contact piece 17 comes into contact with the contact 6A with a large contact pressure.

As described above, according to the present embodiment,
When the thick base portion 3 is inserted, the amount of bending deformation to the outside of the locking piece 18 becomes large, but the guide surface 4 corresponding to the outside of the locking piece 18 of both the positive terminals 15A and 15B.
2A and 42B have relief surfaces 50 and 5 which are retracted outward.
Since the substrate 1 is formed, the substrate 16 on the side where the locking piece 18 is provided is released to the relief surfaces 50 and 51, so that the insertion resistance can be reduced. Further, as the board 16 on the side provided with the locking pieces 18 is released to the outside, the board 16 on the side provided with the contact pieces 17 acts so as to protrude inward. It can be brought into contact with the corresponding contacts 6A and 6B by contact pressure.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) Even in the case of a minus terminal, by providing a step on the guide surface of the substrate, it is possible to release the locking one side to the outside and make the contact one side protrude inward. (2) The present invention can be similarly applied to a valve socket of a single ball type wedge base valve.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wedge-based valve according to an embodiment of the present invention.

FIG. 2 is a bottom view thereof.

FIG. 3 is a partially cutaway perspective view of a valve socket.

FIG. 4 is a plan view thereof.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 4;

FIG. 8 is a perspective view of a positive terminal.

FIG. 9 is a plan view thereof.

FIG. 10 is a side view thereof.

FIG. 11 is a perspective view of a negative terminal.

FIG. 12 is a plan view showing a state where one positive terminal is mounted.

FIG. 13 is a plan view showing a state where the other plus terminal is mounted.

14 is a sectional view taken along line XIV-XIV in FIG.

FIG. 15 is a plan view showing a displacement state of a plus terminal when a thick base portion is inserted.

FIG. 16 is a partial sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wedge base valve 3 ... Base part 6A-6D ... Contact 7A, 7B ... Prevention protrusion 7C ... Projection 11 ... Socket body 12 ... Base insertion hole 15A, 15B ... Plus terminal 16 ... Board 17 ... Contact piece 18 ... Locking piece 42A, 42B: guide surface (wall surface) 50, 51: relief surface

Claims (2)

[Claims] An insertion hole into which a base portion of the wedge base valve is inserted; a contact piece elastically contacting a contact provided on the base portion; A terminal fitting formed with side-by-side locking pieces that elastically lock on the rear side is mounted, while the wall of the insertion hole located outside the contact piece and the locking piece is the locking piece. A valve socket, wherein a portion corresponding to the piece is formed in a stepped shape recessed outside of a portion corresponding to the contact piece. 2. The contact piece and the locking piece are formed side by side by being cut and raised from one substrate,
The substrate can be mounted along a wall surface of the insertion hole, and the wall surface is formed in a stepped shape in which only a portion corresponding to a formation portion of the locking piece is recessed outward. The valve socket according to claim 1.