JP4492996B2 - contact - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a contact provided on a printed wiring board and the like for electrically connecting a wiring pattern of the printed wiring board and a terminal of a battery that is pressed and abutted from above .
[0002]
[Prior art]
An example of the prior art will be described with reference to FIG. FIG. 6 is a longitudinal sectional view of an example of a conventional contact. In FIG. 6, the conventional contact is a protruding shape in which the conductive elastic plate 10 is bent in a substantially U shape so as to be elastically bendable in the thickness direction, and protrudes upward in the middle of one of the folded movable pieces 10a. A bent portion 10b is formed, and the free end portion 10c is bent into a substantially L shape. The conductive elastic plate 10 is housed and fixed in a housing 12 made of an insulating material so that an electrically connected member such as a battery terminal abuts the protruding bent portion 10b in the direction of the arrow A so that the movable piece 10a can be elastically deformed. Is done. Note that the free end portion 10c of the movable piece 10a bent in a substantially L shape is inserted into the housing 12, and the lateral and upward movement is restricted. Further, the other fixed piece 10d placed and folded on the printed wiring board 14 is fixed to a wiring pattern (not shown) of the printed wiring board 14 by soldering or the like and is electrically connected.
[0003]
Another example of the prior art is a contact proposed in Japanese Patent Laid-Open No. 2002-170616. A conventional contact proposed in this publication will be described with reference to FIG. FIG. 7 is an external perspective view of a contact proposed in the publication. In FIG. 7, the same or equivalent members as in FIG. In the technique shown in FIG. 7, the housing 12 in the technique shown in FIG. 6 is not provided. And the free end part 10e of the movable piece 10a is formed in the substantially U shape. In addition, a regulation portion 10f is formed at the free end portion of the fixed piece 10d so as to hold the free end portion 10e of the movable piece 10a so as not to be shifted laterally and upward.
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-170616
6 and 7, the movable piece 10 a is elastically deformed by pressing from above, and the movable piece 10 f is pressed by the housing 12 or the restricting portion 10 f for pressing in the oblique direction. The free end portions 10c and 10e of 10a are not shifted and deformed laterally.
[0005]
[Problems to be solved by the invention]
In the conventional contact shown in FIGS. 6 and 7 described above, the dimension S1 at which the protruding bent portion 10b protrudes from the upper surface of the housing 12 or the restricting portion 10f, or the free end portions 10c and 10e of the movable piece 10a is printed. The stroke of the movable piece 10a is regulated by the shorter one of the dimension S2 until it comes into contact with the wiring board 14 or the fixed piece 10d.
[0006]
Therefore, in order to increase the stroke, both the dimensions S1 and S2 cannot be shortened, and the height of the contact in the natural state and the movable piece 10a is elastically deformed by being pressed by the electrically connected member. There was a problem that all the heights in the state were high.
[0007]
The present invention has been made in view of the circumstances of the prior art, and an object thereof is to provide a contact having a low height even when the stroke is large.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the contact of the present invention forms bent portions by folding back both sides of the conductive elastic plate fixed to the substrate so as to face each other in U shape, V shape or U shape. Each of the movable pieces folded back so that the free end of one of the folded back pieces overlaps the lower side of the free end of the other folded back piece. A side wall portion having a U-shaped cross section with an opening on the lower side is formed to restrict the free end portion of the movable piece from being displaced laterally, and an upwardly projecting protrusion is brought into contact with the electrically connected member against the movable piece. A contact portion of the electrically connected member from above the substrate so that the protruding bent portion and the free end portion of the regulating piece are at a height above the bent portions on both sides. First, the movable piece is elastically deformed, and the electrically connected member is The regulating piece abuts on the braking piece is also configured to be elastically deformed.
[0009]
Further, a notch is provided in the fixed piece between the two bent portions so as to face the free end of the movable piece, and the free end of the movable piece is elastically deformed by contact with the electrically connected member. You may comprise so that a part may not contact | abut to the said fixed piece between the said bending parts.
[0010]
Then, the contact made of the conductive plate is accommodated and fixed in a housing made of an insulating material, and the protruding bent portion and the free end portion of the restriction piece can be elastically deformed by the pressing contact of the electrically connected member. The protruding bent portion and the free end portion of the restricting piece protrude upward from the housing, and the bent portion on the restricting piece side is restricted so as not to be shifted laterally and upward by the housing. it can.
[0011]
Furthermore, a plurality of contacts made of the conductive elastic plate can be arranged and accommodated in the integral housing.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1A and 1B are external views of a contact according to the present invention, in which FIG. 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a cross-sectional view taken along line AA in FIG. FIG. 2 is a longitudinal cross-sectional view of a state in which the contact of FIG. 1 is disposed on the printed wiring board and an electrically connected member is brought into contact with the movable piece to be elastically deformed.
[0013]
First, the contacts of the first embodiment of the present invention are folded back so that both sides of an appropriate conductive elastic plate 20 such as phosphor bronze or beryllium copper whose outer surfaces are plated with gold or the like face each other in a U shape. Bending portions 20a and 20b are formed and can be elastically bent in the thickness direction. In addition, a protruding bent portion 20d that protrudes upward (projected in the direction in which the electrical connection member 30 abuts) is formed in the middle of the folded one movable piece 20c, and the free end portion 20e is substantially L-shaped. Is done. The free end portion 20e of the movable piece 20c overlaps with the lower side of the free end portion of the other regulating piece 20f that is folded back. The free end portion of the restricting piece 20f is formed with a U-shaped side wall portion 20g having an open lower side, and the free end portion 20e of the movable piece 20c is restricted so as not to be shifted laterally and upward. . The free end portions of the protruding bent portion 20d and the restricting piece 20f are formed so as to be higher than the bent portions 20a and 20b on both sides. Further, the fixed piece 20h between the two bent portions 20a and 20b is provided with a notch 20i facing the free end portion 20e of the movable piece 20c, and the free end portion 20e in a state where the movable piece 20c is elastically deformed. Is formed so as not to contact the fixed piece 20h.
[0014]
In the contact having such a configuration, as shown in FIG. 2, the fixing piece 20h is fixed to a wiring pattern (not shown) of the printed wiring board 32 by soldering or the like and is electrically connected thereto. When the electrically connected member 30 such as a battery terminal is pressed and abutted from above, first, the movable piece 20c is elastically deformed, and further the electrically connected member 30 is brought into contact with the free end portion of the regulating piece 20f. Then, both the movable piece 20c and the regulating piece 20f are elastically deformed. Note that, by forming the notch 20i in the fixed piece 20h, the stroke of the free end 20e of the movable piece 20c is increased by the thickness of the conductive elastic plate.
[0015]
In the contact according to the first embodiment of the present invention having the above-described configuration, the stroke of the free end 20e of the movable piece 20c is increased by the amount that the height of the free end changes due to the elastic deformation of the restriction piece 20f. be able to. Therefore, the inventors realized a stroke of 0.9 mm in a contact in which the dimension between the two bent portions 20a and 20b is 7.6 mm and the height of the protruding bent portion 20d in the natural state is 1.7 mm. We were able to. This stroke is 1.8 times the stroke of 0.5 mm when the height is the same in the natural state in the prior art shown in FIG.
[0016]
Next, a second embodiment of the present invention will be described with reference to FIGS. 3A and 3B are external views of the second embodiment of the present invention, in which FIG. 3A is a plan view and FIG. 3B is a front view. 4 is a cross-sectional view taken along line BB in FIG. 5A and 5B are external views of the conductive elastic plate, where FIG. 5A is a front view, FIG. 5B is a plan view, and FIG. 5C is a cross-sectional view taken along the line CC in FIG. 3 to 5, the same or equivalent members as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.
[0017]
First, the conductive elastic plate 40 shown in FIG. 5 differs from the conductive elastic plate 20 shown in FIG. 1 in that terminal portions 40a and 40b are provided on both ends of the fixed piece 20h and on both sides of the notch 20i. The rising rib 40c straddling is provided. Then, a plurality of conductive elastic plates 40 formed in such a structure are arranged in parallel in a single housing 50 made of insulating resin so that the movable piece 20c and the regulating piece 20f are regulated so as not to be displaced laterally. . Here, the rising ribs 40c, 40c,... Are press-fitted into the slit portions provided in the housing 50, and the conductive elastic plates 40, 40,. Further, the upward movement of the bent portion 20b side of the restricting piece 20f is restricted by the spring pressing portion 50a of the housing 50 as shown in FIG. In this fixed state, the free-end portions of the projecting bent portion 20d and the restricting piece 20f protrude above the housing 50, and the movable piece 20c and Of course, the restricting piece 20f can be elastically deformed appropriately. Further, the terminal portions 40a, 40b,... Protrude from the bottom portion of the housing 50 to both ends, and are fixed and electrically connected to the printed wiring board 32 by appropriate soldering or the like.
[0018]
Even in a contact in which a plurality of conductive elastic plates 40, 40,... Are disposed in the housing 50, the height at which the side wall portion 20g of the regulating piece 20f is provided can be set high in a natural state, and the stroke of the movable piece 20c can be increased accordingly. can do.
[0019]
In the second embodiment, the diameter of the bent portion 20b on the regulating piece 20f side of the conductive elastic plate 40 is reduced and the height of the bent portion 20b is reduced, but the conductive elastic plate 40 is located above the housing 50. If the structure is such that it does not slip, the spring pressing portion 50a need not be provided.
[0020]
Moreover, in the said 1st and 2nd Example, although the bending parts 20a and 20b are bend | folded by substantially U shape, it is not restricted to this, V shape and U shape may be sufficient. Further, the electrically connected member 30 is not limited to a battery terminal, and may be a pattern of another printed wiring board, a shield case, or the like. And a contact is not restricted to what is fixed to the printed wiring board 32, You may arrange | position suitably to another board | substrate . Furthermore, it will be easily understood that the size of the contact according to the present invention can be appropriately changed to be suitable for the size of the electrically connected member 30.
[0021]
【The invention's effect】
As described above, since the contact of the present invention is configured, the following effects can be obtained.
[0022]
In the contact according to claim 1, the free end portion of the movable piece that first elastically deforms when the electrically connected member abuts from above the substrate is laterally and laterally provided by the side wall portion provided at the free end portion of the restriction piece. shift upward are restricted, and since also restricting piece side wall portion is formed for restricting the displacement of the free end of the movable piece can be elastically deformation, the amount corresponding to the movable piece the restricting piece is elastically deformed Stroke can be set large. Therefore, even a contact with a low height can increase the stroke of the movable piece, which is suitable for reducing the height of parts.
[0023]
According to the second aspect of the present invention, since the notch is provided in the fixed piece so that the free end portion of the movable piece does not contact, the stroke of the movable piece can be increased by the thickness of the conductive elastic plate. Therefore, the thickness of the conductive elastic plate is advantageous in reducing the contact height.
[0024]
In the contact according to claim 3, the conductive elastic plate is inserted and fixed in the housing, and the bent portion side of the restricting piece is regulated by the housing in a lateral and upward direction. Deviation of the provided side wall is restricted. Accordingly, the displacement of the free end portion of the movable piece is further restricted.
[0025]
According to the fourth aspect of the present invention, since the plurality of contacts are disposed in the integral housing, it is suitable for electrically connecting the plurality of electric circuits.
[Brief description of the drawings]
1A and 1B are external views of a contact according to the present invention, in which FIG. 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a cross-sectional view taken along line AA in FIG.
2 is a longitudinal sectional view showing a state in which a movable piece or the like is elastically deformed by disposing the contact of FIG. 1 on a printed wiring board and bringing an electrical connection member into contact therewith.
3A and 3B are external views of a second embodiment of the present invention, where FIG. 3A is a plan view and FIG. 3B is a front view.
4 is a cross-sectional view taken along the line BB in FIG. 3;
5A and 5B are external views of a conductive elastic plate, in which FIG. 5A is a front view, FIG. 5B is a plan view, and FIG. 5C is a cross-sectional view taken along the line CC in FIG.
FIG. 6 is a longitudinal sectional view of an example of a conventional contact.
FIG. 7 is an external perspective view of a contact proposed in the publication.
[Explanation of symbols]
10, 20, 40 Conductive elastic plates 10a, 20c Movable pieces 10b, 20d Protruding bent portions 10c, 10e, 20e Free end portions 10d, 20h Fixed pieces 10f Restricting portions 12, 50 Housings 14, 32 Printed wiring boards 20a, 20b Part 20f Regulating piece 20g Side wall part 20i Notch 30 Electrically connected member 40a, 40b Terminal part 40c Rising rib 50a Spring pressing part

Claims (4)

Both sides of the conductive elastic plate fixed to the substrate are folded back so as to face each other in a U-shape, V-shape, or U-shape to form respective bent portions so that they can be flexibly elastically bent in the thickness direction. The free end portion of the other movable piece overlaps with the lower side of the free end portion of the other restricting piece, and a U-shaped side wall portion having a lower opening is formed at the free end portion of the restricting piece. Then, the movable end of the movable piece is restricted from being laterally displaced, and a protruding bent portion is provided on the movable piece so that an electrically connected member abuts on the movable piece, and the protruding bent portion and the restriction are provided . First, the movable piece is elastically deformed by the contact of the electrically connected member from above the substrate so that the free end of the piece is higher than the bent portions on both sides. The connecting member abuts on the restriction piece and the restriction piece is also elastically deformed. Contact, characterized in that was.   2. The contact according to claim 1, wherein a notch is provided in a fixed piece between the two bent portions so as to face a free end portion of the movable piece, and the electrically connected member abuts so that the movable piece is elastically deformed. The contact is configured such that the free end portion does not come into contact with the fixed piece between the bent portions. 3. The contact according to claim 1, wherein the contact made of the conductive plate is housed and fixed in a housing made of an insulating material, and the protruding bent portion and the play of the regulating piece are freed by pressing contact of the electrically connected member. The protruding bent portion and the free end portion of the restricting piece protrude upward from the housing so that the end portion can be elastically deformed, and the bent portion on the restricting piece side is not shifted laterally and upward by the housing. A contact characterized in that it is restricted and configured.   4. The contact according to claim 3, wherein a plurality of contacts made of the conductive elastic plate are arranged and accommodated in the integrated housing.

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