Battery to circuit board electrical connector

[00002] This invention generally relates to the art of electrical connectors and, particularly, to a vertical type battery connector for use in various electronic devices such as a conventional mobile phone.

[00003] For instance, FIGS. 5, 6 and 7 show a vertical type battery connector as is disclosed in Taiwanese Patent Application No. 88100725, filed Jan. 18, 1999. The connector, generally designated 12, includes a dielectric or insulative housing, generally designated 14, which mounts a plurality of conductive terminals, generally designated 16 and one of which is shown in FIG. 16. The housing includes a top wall which defines a top circuit board mounting face 18, a bottom wall which defines a bottom circuit board mounting face 20, a front connecting face 22 and a rear terminating face 24. Each conductive terminal 16 includes a main body 26 having a first contact portion 28 extending from one side thereof and outwardly of rear terminating face 24 of the housing for connection to an appropriate circuit trace on a circuit board 30 (FIG. 7). A second contact portion extends from an opposite side of main body 26 and outwardly of front connecting face 22 of the housing for electrical connection to an appropriate contact 30 of an electronic device such as a battery 36 (FIG. 7). In this particular connector construction, a third contact portion 38 projects upwardly from main body 26 for engaging an appropriate circuit trace on the underside of a second circuit board 40 (FIG. 7).

[00004] In battery connection 12 of FIGS. 5-7, it can be seen that first contact portions 28 of terminals 16 project outwardly of rear terminating face 24 of the housing for electrical connection to circuit board 30, while second contact portions 32 of the terminals project from the opposite or front connecting face 22 of the housing for electrical connection to battery 36. This arrangement of the contact portions of the terminals which results in a connecting width “W2” for the battery connector between first and second contact portions 28 and 32, respectively, between circuit board 30 and battery 36. With the ever-increasing miniaturization of electrical equipment such as mobile telephones, attempts constantly are being made in the industry to reduce these connecting widths.

[00005] FIGS. 8, 9 and 10 show a vertical type battery connector, generally designated 40, as is disclosed in Taiwanese Utility Model Patent Application No. 91200828 which was filed on Jan. 28, 2002. In this disclosure, battery connector 40 includes a dielectric housing, generally designated 42, which mounts a plurality of conductive terminals, generally designated 44.

[00006] Dielectric housing 42 of battery connector 40 includes a plurality of upright walls 46 extending upwardly from an upper surface of a bottom wall 48. Upright walls 46 are spaced from each other and adjacent pairs of the upright walls form a plurality of terminal-receiving passages 50. A front wall 52 is further formed with openings 54 aligned with terminal-receiving passages 50 so that the passages extend through the front and rear ends thereof. Opposing wall surfaces 56 and 58 of upright walls 46 of each terminal-receiving passage 50 have retaining blocks 60 projecting into passages 50 at positions adjacent a bottom wall 62 of each passage 50 and spaced therefrom. The opposing retaining blocks do not touch each other within each passage as can be seen in FIG. 9, and the retaining blocks are spaced above a bottom wall 62 (FIG. 9) of the respective passage to form a retaining groove 64 as seen in FIG. 10. In addition, a lower surface of bottom wall 48 of the housing is formed with a plurality of downwardly extending partition plates 66 vertically aligned with upright walls 46 to form limiting grooves 68 vertically aligned with terminal-receiving passages 50. Finally, a positioning block projects outwardly from each opposite end of the housing so that the positioning blocks can be used to position battery connector 40 relative to an appropriate mating connecting device.

[00007] Each conductive terminal 44 received in a respective one of the terminal-receiving passages 50 in housing 42 is stamped and formed of conductive sheet metal material and includes a main body 72, a first contact portion 74 and a second contact portion 76.

[00008] Main body 72 of each terminal 44 is a generally rectangular plate having a first side 72a and a second side 72b. First contact portions 74 extends obliquely downwardly and then obliquely upwardly from first side 72a to form a hook configuration 74a of first contact portion 74 for electrically engaging circuit board 30. Second contact portion 76 is formed in the shape of a U-shaped elastic arm 76a defined by a pair of opposing legs 76b of the U-shaped configuration. Elastic arm 76a projects from second side 72b of main body 72 and outwardly of the terminating face of the connector whereby second contact portion 76 can electrically engage contacts 34 (FIG. 10) of battery 36. Finally, the distal end of elastic arm 76a is provided with a retaining hook 76c which abuts against a back side 52a of front wall 52 of the housing.

[00009] During assembly of battery connector 40, conductive terminals 44 are inserted into terminal-receiving passages 50 in the direction of arrow “A” (FIG. 10) until main bodies 72 of the terminals are secured within retaining grooves 64 of the housing. At full assembly, retaining hooks 76c of the terminals engage back sides 52a of front wall 52. It can be seen that the only mounting, retaining or securing means for the entirety of each terminal 44 is at the single main body 72 of the terminal. This retention is achieved solely by the interference fit of main bodies 72 of the terminals. After assembly, contacts 34 of a battery 36 may be appropriately engaged with contact portions 76 of terminals 44 if the battery is engaged in the direction of arrow “B” (FIG. 10). However, difficulties may be encountered if the battery is moved into engagement in the direction of arrow “C”.

[00010] An object, therefore, of the invention is to provide a new and improved electrical connector of the character described.

[00011] Another object of the invention is to provide a battery connector of the character described, including the provision of improved contact engagement and/or improved terminal retention.

[00012] In the exemplary embodiment of the invention, the connector includes a dielectric housing having first and second spaced-apart faces with at least one terminal-receiving passage communicating between the faces. The passage includes a terminal mounting portion and a terminal securing portion. A conductive terminal is received in the at least one terminal-receiving passage and includes a body portion for engaging the terminal mounting portion of the passage. A first contact portion extends from one side of the body portion for establishing electrical connection with a first electrical device at the first face of the housing. A second contact portion extends from a second side of the body portion for establishing electrical connection with a second electrical device at the second side of the housing. A securement portion is provided for engaging the terminal securing portion of the passage.

[00013] As disclosed herein, the conductive terminal is stamped and formed of sheet metal material. The first and second faces of the dielectric housing are generally perpendicular to each other. The first contact portion of the conductive terminal projects from the first face of the housing and is adapted for establishing electrical connection with a circuit board. The second contact portion of the conductive terminal projects from the second face of the housing and is adapted for establishing electrical connection with a contact of a battery.

[00014] According to further aspects of the invention, the terminal mounting portion of the housing and the body portion of the terminal have complementary interengaging interference means to hold the terminal to the housing. In addition, the terminal securing portion of the housing and the securement portion of the terminal have complementary interengaging interference means to hold the terminal to the housing. The complementary interengaging interference means between both the terminal mounting portion of the housing and the body portion of the terminal as well as the terminal securing portion of the housing and the securement portion of the terminal are arranged for interengagement by inserting the entire terminal into the one terminal-receiving passage from one common face of the housing.

[00015] Other objects, features and advantages of the invention will be apparent from the following detailed description taken in connection with the accompanying drawings.

[00023] Referring now to FIGS. 1-4, the invention is embodied in an electrical connector in the form of a battery connector, generally designated 80, which includes a dielectric or insulative housing, generally designated 82, that adapted to be mounted on a circuit board 83 (FIG. 4) of a mobile phone to establish electrical connection with corresponding contacts and to establish electrical connection with a battery 36 (FIG. 4) used by the mobile phone. The housing mounts a plurality of conductive terminals, generally designated 84, which are stamped and formed of conductive sheet metal material.

[00024] Housing 82 of battery connector 80 may be a one-piece structure unitarily molded of dielectric material or the like. The housing includes a bottom wall 82a, a top wall 82b and a plurality of parallel upright walls 82c which form a plurality of parallel spaced-apart terminal-receiving passages 86. The housing has a plurality of posts 82d which project downwardly below bottom wall 82a and are in alignment with upright walls 82c of the housing. In essence, posts 82d form passage extensions 86a in alignment with terminal-receiving passages 86 for positioning or receiving portion of the terminals as described hereinafter.

[00025] In essence, housing 82 of battery connector 80 defines a first or bottom face 89 at the bottom of posts 82d for engaging circuit board 83 (see FIG. 4). The housing also defines a second or front face 90 as well as a rear face 92. Battery 36 is electrically connected to the connector at the second or front face 90 as seen in FIG. 4.

[00026] Each conductive terminal 84 of battery connector 80 includes a main body 84a having a first side 84b and a second side 84c opposite the first side. A first contact portion, generally designated 94, is bent back forwardly from a first end of main body 84a in the form of a hook and has a downwardly slanting first portion 94a and an upwardly slanting second portion 94b joined at a hooked contact point 94c which engages an appropriate circuit trace on circuit board 84 as seen clearly in FIG. 4.

[00027] A second contact portion, generally designated 96, extends from a second end of a body portion defined by main body 84a for establishing electrical connection with contacts 34 of battery 36 as seen in FIG. 4. More specifically, an upright extension arm 96a extends upwardly from the main body 84a and is bent back downwardly into a first contact arm 96b joined to a second contact arm 96c at a convex contact point 96d which engages contact 34 of battery 36. Second contact arm 96c has a distal end 96e which can ride along the surface of extension arm 96a as second contact portion 96 is spring loaded by its closed configuration.

[00028] Generally, complementary interengaging interference means are provided between main body 84a of each terminal 84 and housing 82 to hold the terminal in its respective terminal-receiving passage 86 in the housing. Specifically, housing 82 includes a terminal mounting portion defined by a pair of opposing retaining blocks 100 at the bottom of each terminal-receiving passage 86. Terminals blocks 100 project toward each other and define an inverted T-shaped mounting slot 102 for receiving the main body of the respective terminal, with the extension arm 96a of the respective terminal extending from the main body 84a upwardly between the retaining blocks joining the body portion to a securement portion, the securement portion being defined by a pair of securement wings 106. As seen in FIG. 2, a plurality of mounting teeth 104 are stamped into the edges of the main body portion of the terminal for skiving into the plastic material of the housing beneath retaining blocks 100 to provide an interference to hold the terminal in the housing.

[00029] Generally, complementary interengaging interference means are provided between a pair of securement wings 106 at opposite edges of the extension arm 96a of each terminal and a securement block 108 at opposite sides of each terminal-receiving passage 86 of the housing, to hold the respective terminal in the housing. Specifically, each securement block 108 has a slot 110 for receiving one of the securement wings 106 of a respective one of the conductive terminals. Each securement wing 106 is stamped with a plurality of teeth 106a along opposite edges thereof for skiving into the plastic material of the housing within grooves 111. A surface of the extension arm 96a is located between the opposite edges. Each securement wing 106 extends perpendicular from the edges and the surface. The teeth 106a establish an interference fit between the terminal and the housing to hold the terminal in its respective terminal-receiving passages 86 of the housing.

[00030] It will be understood that the invention may be embodied in other specific forms without departing from the spirit or central characteristics thereof. The present examples and embodiments, therefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein.