Patent Application
20120171905
1. Technical Field
One or more embodiments of the present invention relate to a terminal, for example, a terminal is not only incorporated in a housing to configure a connector, but also directly mounted on a board for use.
2. Background Art
As a conventional terminal, for example, a contact for an IC socket in which a terminal contact part is integrally formed via a spring side part of which a base portion is connected to a support side part, is known (see Patent Document 1). The spring side part of this contact is approximately formed in a lateral U-shape by an upper side arm extended from a coupling portion to the terminal contact part and a lower side arm extended from the coupling portion to the base portion. The upper side arm includes a first spring portion and a second spring portion which are extended away from and in parallel with each other. The lower side arm includes a third spring portion and a fourth spring portion which are extended away from and in parallel with each other. Further, the spring side part slopes down from the coupling portion to the base portion.
Regarding the contact for an IC socket mentioned above, for example, as shown in FIG. 4 of Patent Document 1, a linear upper side arm 2 and a linear lower side arm 3 are coupled at a coupling portion 8. Therefore, a depth of the contact is long and a floor space of the contact is large, and hence a large mounting space is required.
One or more embodiments of present invention provide a space-saving terminal in which a depth is short and a floor space is small.
A terminal according to one or more embodiments of the present invention includes: a fixing part for press-in, pressed into and fixed to a base material; a support part projected upward so as to cross with the fixing part for press-in; a plurality of extension parts extended downward while meandering from a branch portion provided on a tip of the support part so as to form at least one meandering slit; and a movable contact part projected from a tip portion formed by integrating free ends of the extension parts so as to be capable of moving in and out of a contacting hole of the base material, wherein the support part is curved outward in order to avoid contact with the tip portion of the extension parts while the tip portion is displaced.
According to one or more embodiments of the present invention, the support part is curved outward so that the tip portion of the extension parts does not come into contact even if the tip portion of the extension parts extended downward is laterally disposed. Accordingly, a lateral distance between the tip portion of the extension parts and a base portion of the support part can be reduced, so that a space-saving terminal in which a depth is short and a floor space is small, is provided.
In one or more embodiments of the present invention, a width of the slit may be determined so as to be capable of avoiding contact of the neighboring extension parts with each other in motion.
According to one or more embodiments of the present invention, because the extension parts do not come into contact with each other, a smoothly movable terminal is provided in which dissonant contact noises are not generated.
In one or more embodiments of the present invention, widths of the plurality of extension parts may differ from each other.
According to one or more embodiments of the present invention, the width of the slit can be appropriately selected as required, and thereby stress concentration does not occur and durability is improved. In addition, the extension parts are prevented from coming into contact with each other, and hence a smoothly movable terminal is provided in which dissonant contact noises are not generated.
In one or more embodiment of the present invention, a width of a greatly curved portion of one of the extension parts may be gradually increased.
According to one or more embodiments of the present invention, a terminal is provided in which extreme stress concentration does not occur, durability is improved, and the life is longer.
In one or more embodiments of the present invention, a contact part for positioning which comes into contact with a receiving part for positioning of the base material may be provided on the periphery of the movable contact part.
According to one or more embodiments of the present invention, because the extension parts of the terminal can be accurately located on a predetermined position, motion characteristics are improved.
A connector according to one or more embodiments of the present invention is configured such that the fixing part for press-in of the terminal mentioned above is pressed into and fixed to a press-in hole of a housing as the base material, and the movable contact part is projected from a contacting hole formed in the housing so as to be capable of moving in and out of the contacting hole.
The connector according to one or more embodiments of the present invention has high contact reliability and a long life.
In one or more embodiments of the present invention, the contact part for positioning formed on the periphery of the movable contact part of the terminal may be brought into contact with the receiving part for positioning formed on an edge portion of the contacting hole of the housing so as to be positioned.
According to one or more embodiments of the present invention, because the movable contact part of the terminal can be highly accurately positioned, a connector having invariable motion characteristics is provided.
Embodiments of a terminal according to the present invention will be described with reference to accompanying
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A width of the first slit 35a according to one or more embodiments is determined to have a size such that the first and second extension parts 34a, 34b do not come into contact with each other even when the movable contact part 36 of the contact terminal 30 is moved. Therefore, the first and second extension parts 34a, 34b do not come into contact with each other in predetermined motion, thereby exerting the advantage that dissonant contact noises are not generated.
As shown in
When the movable contact part 36 of the connector mounted on a printed circuit board (not shown) is pressed in, the first and second extension parts 34a, 34b are elastically deformed and the support part 32 is elastically deformed. At this time, because the width of the first slit 35a is appropriately large, the first and second extension parts 34a, 34b do not come into contact with each other within a predetermined amount of pressing. Accordingly, the contact terminals 30 can be smoothly moved without frictional noises.
Because the support part 32 and the first and second extension parts 34a, 34b are disposed between the movable contact part 36 and the fixing part for press-in 31, the spring length is long and stress concentration hardly occur. Therefore, the connector having high contact reliability and a long life is advantageously provided.
In one or more embodiments, when the movable contact part 36 is pressed inward, because the support part 32 is curved outward, the tip portion of the second extension part 34b does not come into contact with the support part 32. Accordingly, the one or more embodiments have the advantage that the space-saving connector in which the depth is short and the floor space is small is provided.
One or more embodiments of the present invention describe the case where the first slit 35a is formed by extending the two first and second extension parts 34a, 34b. However, two slits may be formed by extending three meandering extension parts. In this case, one end portions of the extension parts may be arranged on a same straight line. Alternatively, the first branch part and a first extension part may be extended from the tip portion of the support part, and the second and third extension parts may be extended from the first branch portion.
A projection for positioning may be projected on the periphery of the movable contact part, and the projection for positioning may come into contact with the receiving part for positioning formed on an edge portion of the contacting hole so as to be positioned.
In one or more embodiments as described above, the pair of two contact terminals and the one contact terminal are combined in the housing. However, the combination of each one contact terminal or the combination of each pair of two contact terminals may be adopted. Further, a combination of each triple contact terminals may be adopted, that is, the number of the terminals may be selected obviously as necessary.
It is not indispensable that the first extension part and the second extension part have a uniform width. For example, a greatly curved portion of the extension part disposed on the outer side may be gradually increased in width in order to prevent extreme stress concentration and to improve durability.
In one or more embodiments as described above, the contact terminals are incorporated into the housing as a base material. However, the contact terminals of one or more embodiments of the present invention may be directly incorporated into a side end surface of a printed circuit board as a base material. In this configuration, the housing and the fixing brackets are not required, and hence this configuration has the advantage that the entire device can be downsized.
The terminal according to one or more embodiments of the present invention is not specifically limited to one of the modes described above, as long as having the plurality of meandering extension parts.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having the benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2010-247556 | Nov 2010 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2011/057172 | 3/24/2011 | WO | 00 | 11/9/2011 |
