JP2011181420A - Blade and connector set using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade as a plug terminal that stably achieves sufficient contact pressure. <P>SOLUTION: A contact has two contact points protruding on the surface of a contact-point spring and arranged opposite to each other via a space. The blade includes a blade body inserted into the space so as to achieve electrical conduction and mechanical contact with the contact points with respect to the contact. The blade body 21 has a long groove 23 as a recess at least at a part in contact with each contact point. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a blade and a connector set using the blade.

  In recent years, a battery such as a lithium ion secondary battery is detachably attached to a mobile terminal body in a mobile terminal such as a mobile phone. Various connection structures are used to electrically connect the battery to the mobile terminal body. For example, a structure has been proposed in which a battery connector having contact pins is attached to the battery side, a connector plug having a blade (tab-like terminal) is attached to the mobile terminal body, and the contact pins are connected to the connector plug.

Some looseness due to such parts crossing or assembly crossing is unavoidable in such electrical connection, variation in contact pressure occurs, and sufficient contact pressure cannot be obtained, which may cause poor contact. .
In view of this, a structure has been proposed in which a contact pin absorbs a positional deviation from a tab-like terminal of a mating plug to prevent contact failure (for example, Patent Document 1).

Further, the plug side blade is also devised to prevent conduction failure.
For example, in Patent Document 2, as shown in FIG. 22, the plug terminal body 1003 is attached to the surface of the spring plate 1002 by the edge portion 1006 generated by recessing the groove 1005 in the contact surface 1004 with the spring plate 1002. A structure in which an oxide film or dust is scraped off has been proposed.

JP 2003-323931 A Japanese Utility Model Publication No. 5-092971

In the case of the plug terminal shown in Patent Document 2, it is said that an oxide film and dust adhered and generated on the surface of the spring plate 1002 can be removed, but a sufficient contact pressure cannot be obtained even by a slight displacement, resulting in poor contact. There was something I couldn't avoid.
In addition, when the contact that contacts the plug terminal is a contact that protrudes from the contact spring portion, in particular, sufficient contact cannot be obtained, and when the groove is large with respect to the contact, In some cases, the contact got stuck in the groove, and even a slight contact could not be obtained.
In particular, in the case of a connector for a battery, a current flows due to the contact between the contact and the blade, so that sufficient contact is required. Become. Therefore, it has been necessary to provide a connector having sufficient contact pressure and excellent contactability.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a blade as a plug terminal capable of stably obtaining a sufficient contact pressure.

Therefore, the blade of the present invention is a blade having a blade body that is inserted into this space so that a contact having two contact points arranged opposite to each other is brought into electrical conduction and mechanical contact with the contact point. The blade body is characterized in that a concave portion is provided at least in a portion that contacts the contact point.
According to the present invention, in the blade, the contour of the recess is formed smaller than the contact.
According to the present invention, in the blade, the concave portion is a long groove formed so that a longitudinal direction thereof is along an insertion direction of the blade between the contact points.
According to the present invention, in the blade, the long groove is a plurality of grooves arranged in parallel to each other.
According to the present invention, in the blade, the long groove is composed of a plurality of grooves arranged continuously.
According to the present invention, in the blade, the cross section of the long groove is a triangle with the opening side as a base.
According to the present invention, in the blade, a plurality of blade bodies are arranged in parallel with each other at a predetermined interval.
The present invention also provides a connector set comprising a blade and a connector having at least one contact into which the blade is inserted, wherein the contact has two contacts arranged opposite to each other. A spring portion, a fixed portion connecting the two contact spring portions, and two leg portions connected to the fixed portion and provided with a stress absorbing portion, and the leg portions constitute a terminal for electrical connection. It is characterized by that.

  According to the above configuration, the contact between the contact and the blade becomes a point contact, so that the contact pressure can be increased and a more reliable electrical connection can be obtained.

The perspective view which shows the braid | blade of this Embodiment 1. It is a figure which shows the braid | blade of this Embodiment 1, (a) is a top view of this braid | blade, (b) is a side view, (c) is a front view. It is a figure which shows the state which mounted | wore the battery socket with which the braid | blade of this Embodiment 1 was mounted | worn on the battery side, (a) is a top view, (b) is a side view. The principal part expanded sectional view which shows the mounting state of the braid | blade of this Embodiment 1. The principal part expanded sectional view which shows the mounting state of the braid | blade of this Embodiment 1 (The modification of a blade surface shape) Sectional drawing which shows the state with which the braid | blade of this Embodiment 1 was mounted | worn with the battery socket with which the battery side was mounted | worn. The perspective view which shows the braid | blade of the modification 1 of this Embodiment 1. FIG. It is a figure which shows the braid | blade of the modification 1 of this Embodiment 1, (a) is a top view of this braid | blade, (b) is a side view, (c) is a front view. Sectional drawing which shows the state with which the braid | blade of the modification 1 of this Embodiment 1 was mounted | worn with the battery socket with which the battery side was mounted | worn. The perspective view which shows the blade part of this Embodiment 2. FIG. The principal part expanded sectional view which shows the mounting state of the braid | blade of this Embodiment 2. Further enlarged cross-sectional view of the main part of FIG. The perspective view which shows the braid | blade of the modification of this Embodiment 2. FIG. It is a figure which shows the state before the connector connection of the battery pack of this Embodiment 3, (a) is a general view of a battery pack, (b) is a principal part enlarged view of a connector part. It is a figure which shows the connector connection state of the battery pack of this Embodiment 3, (a) is a general view of a battery pack, (b) is a principal part enlarged view of a connector part. It is a figure which shows the battery socket of the battery pack of this Embodiment 3, (a) is a top view, (b) is a side view, (c) is a front view. (A) And (b) is a perspective view which shows 1 unit of the contact of this Embodiment 3, (b) is the figure seen from the back side of (a) It is a figure which shows 1 unit of the contact of this Embodiment 3, (a) is a top view, (b) is a side view, (c) is a front view Explanatory drawing which shows the contact of this Embodiment 3. Explanatory drawing which shows the contact of this Embodiment 3. (A) And (b) is a perspective view which shows the contact of this Embodiment 4, (b) is the figure seen from the back surface side of (a). Diagram showing a conventional plug terminal

(Embodiment 1)
Next, the blade according to the first embodiment will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a blade portion 20 according to the first embodiment, FIG. 2 (a) is a top view of the blade, (b) is a side view, and (c) is a front view. FIGS. 3A and 3B are views showing a state in which the blade is attached to the battery socket 10, in which FIG. 3A is a top view and FIG. 3B is a side view. FIG. 4 is an enlarged cross-sectional view of a main part showing this mounted state.

  As shown in FIG. 1, the blade portion 20 is characterized by including a blade body 21 in which a long groove 23 as a concave portion is formed in at least a portion contacting the contact points 112a and 112b (see FIG. 4). . The blade body 21 protrudes from the surface of the contact spring portion, and is in electrical continuity and mechanical contact with the contact with respect to the contact of the battery socket 10 having two contacts arranged to face each other through the space. It is inserted into this space. Of the blade body 21, the long groove 23 is formed in parallel with each other along the insertion direction S of the blade portion 20 between the contact points 112a and 112b of the contact. The concave portion constituting the long groove 23 is formed such that the contour of the opening end is smaller than the width of the contact points 112a and 112b. The long groove 23 is composed of twelve grooves arranged continuously, and each long groove 23 is a groove having a triangular cross section with the opening side as a base.

  As shown in FIG. 1, the blade portion 20 is formed by punching and forming a metal plate made of a copper alloy, and then a blade body 21 having a nickel plating layer and a gold plating layer sequentially formed on the surface is parallel to each other at a predetermined interval. And is supported by a blade housing 22 as a support portion. The blade housing 22 is formed of a resin molded product formed of a thermoplastic resin such as an insulating resin such as LCP resin or PA resin.

Although the socket connected to the blade part 20 will be described later, FIG. Since the blade portion 20 is in point contact with the contacts 112a and 112b of the contact 11 of the battery socket 10, that is, at four points P1, P2, P3 and P4, the contact pressure is high and the contact property is enhanced. A reliable electrical connection can be obtained.
Further, since the concave portion on the surface of the blade body 21 is a long groove 23 formed with a flat portion so as to form a predetermined interval, foreign matter such as dust can be swept away by pressure at the time of insertion. The foreign matter effect (wiping effect) is improved and the contact stability can be enhanced.
Therefore, as shown in FIG. 3, it is possible to realize electrical connection with good contact in connection with the battery socket 10 mounted on the battery side.

  Furthermore, since the long groove 23 is arranged so that a plurality of grooves are parallel to each other, the probability that the contact will fit into the groove is higher than in the case of one groove, and the contact stability is further improved. The foreign matter resistance is also improved.

  Moreover, the long groove 23 may be comprised by the some groove | channel arrange | positioned continuously without a flat part so that the principal part expanded sectional view may be shown in FIG. According to this configuration, the probability that the contact will fit in the groove is further increased, the contact stability is further improved, and the foreign matter resistance effect is also improved.

Furthermore, since the cross section of the long groove 23 is a triangle with the opening side as the base, a continuous groove can be formed stably. In addition, the contact pressure can be obtained while obtaining stable contact.
Further, since the plurality of blade main bodies 21 are supported by the blade housing 22 as a support portion so as to be parallel to each other at a predetermined interval, the positional accuracy can be maintained.

  Further, the blade portion 20 is connected to the printed wiring board 200 by soldering with a terminal piece 24 as shown in a sectional view in FIG.

(Modification 1)
In the first embodiment, the standard blade thickness is described, but a thin blade will be described as a modification. 7 is a perspective view showing a blade 120 of a modification of the first embodiment, FIG. 8A is a top view of the blade, FIG. 7B is a side view, and FIG. In the case of a thin blade, as shown in FIGS. 7 to 8, the blade housing 122 may cover the entire blade insertion side end of the blade body 121.
Since other configurations are the same as those in the first embodiment, description thereof is omitted here.
Further, the blade 120 is connected to the printed wiring board 200 by soldering with a terminal piece 124 as shown in FIG.
According to this configuration, a reliable connection can be realized even in the case of a thin blade.

(Embodiment 2)
In the first embodiment, the case where the concave portion formed in the blade is a long groove has been described, but in the present embodiment, a blade in which the through hole 25 is formed in the blade body 21 will be described.
10 is a perspective view showing the blade portion 20 of the second embodiment, FIG. 11 is an enlarged cross-sectional view of a main portion showing a state where the blade body 21 is attached to the battery socket 10 attached to the battery side, and FIG. It is the principal part expanded sectional view of FIG.
Since other configurations are the same as those in the first embodiment, description thereof is omitted here.

A battery socket as a connector connected to the blade portion 20 will be described later. As shown in enlarged sectional views of main portions in FIGS. 11 and 12, the blade body 21 is connected to the contacts 112 a and 112 b of the contact 11 of the battery socket 10. On the other hand, since contact is made at four points, that is, Q1, Q2, Q3, and Q4, contact pressure is high, contactability is improved, and reliable electrical connection can be obtained.
In addition, the diameter of the through hole 25 is smaller than the diameter of the protrusions of the contacts 112 a and 112 b, so that the blade body 21 can reliably be in contact with the contacts 112 a and 112 b of the contact 11 of the battery socket 10. Point contact.
In this case as well, since it is a long hole along the insertion direction S of the blade body 21, foreign matter such as dust can be swept by the pressure at the time of insertion, the foreign matter resistance effect (wiping effect) is improved, and contact stability is achieved. Can increase the sex.
According to this configuration, a reliable connection can be realized.

(Modification 2)
In the second embodiment, the standard blade thickness is described, but a thin blade will be described as a modification. FIG. 13 is a perspective view showing a blade 120 according to a modification of the second embodiment. When the blade is a thin blade, the blade housing 122 may cover the entire blade insertion side end of the blade body 121 as in the first modification. 123 is a long hole.
Since other configurations are the same as those in the second embodiment, description thereof is omitted here.
According to this configuration, a reliable connection can be realized even in the case of a thin blade.

(Embodiment 3)
Next, as a third embodiment, a battery pack of a mobile phone that is connector-connected using the blade portion 20 will be described. FIGS. 14 and 15 are views showing a state before the connector connection and a state after the connection in the battery pack using the blade of the third embodiment. 14 and 15, (a) is an overall view of the battery pack, and (b) is an enlarged view of the main part of the connector portion. FIG. 16 is a view showing the socket side of this connector, that is, a battery socket, where (a) is a top view, (b) is a side view, and (c) is a front view. FIGS. 17A and 17B are perspective views showing one unit of the contact according to the third embodiment. FIG. 17B is a view as seen from the back side of FIG. FIGS. 18A and 18B are views showing one unit of the contact according to the third embodiment, where FIG. 18A is a top view, FIG. 18B is a side view, and FIG. 18C is a front view. 19 and 20 are explanatory views showing the contactability of this contact.

  As shown in FIGS. 14 and 15, this battery pack includes a battery main body 100, a battery socket 10 attached to the battery main body 100, and a blade portion 20 attached to a casing or substrate of a mobile phone. As shown in FIGS. 16A to 16C, the battery socket 10 includes a socket housing 12 made of a resin molded product formed of a thermoplastic resin such as an insulating resin such as LCP resin or PA resin, A contact portion in which a plurality of contacts 11 are arranged is mounted by press fitting.

  As shown in FIGS. 17A and 17B, the contact according to the third embodiment was obtained by punching and then bending a metal plate in which a nickel plating layer and a gold plating layer were formed on a copper alloy. Is. This contact is characterized in that a fixing portion 111 that connects two contact spring portions 113a and 113b is connected to two leg portions 115a and 115b via stress absorbing portions 114a and 114b. That is, the contacts are arranged opposite to each other, the contact spring portions 113a and 113b having the two contact points 112a and 112b, the fixing portion 111 connecting the two contact spring portions 113a and 113b, and the fixing. And two leg portions 115a and 115b provided with stress absorbing portions 114a and 114b. These leg portions 115a and 115b constitute terminal portions 116a and 116b for electrical connection at the end portions.

  Here, as shown in FIGS. 17 and 18, the stress absorbing portions 114a and 114b extend outward from the contacts 112a and 112b and absorb stress in a direction parallel to the direction connecting the two contacts 112a and 112b. It is configured.

  The two contact spring portions 113a and 113b are erected substantially vertically from the fixed portion 111. The leg portions 115a and 115b are connected on the same plane as the connecting portion 118 extending from the connecting portion 118 in a direction orthogonal to the connecting direction of the fixing portion 111 to the contact spring portions 113a and 113b. The stress absorbing portions 114a and 114b having curved portions led to the outside are configured. One end of each of the leg portions 115a and 115b is pulled out along the fixed portion from the connecting portion 118, is extended along the contact spring portions 113a and 113b, and is further pulled out and bent. . Furthermore, it extends to the vicinity of the connection part 118 along the contact spring parts 113a and 113b, and further bends in a direction perpendicular to the bending direction to constitute the stress absorbing parts 114a and 114b. The stress absorbing portions 114a and 114b branch at the tip into a press-fit end and terminal portions 116a and 116b. It is bent so as to be on the same plane.

In addition, the connecting portion 118 leads out the stress absorbing portions 114a and 114b formed of curved portions as free pieces by notches 117a and 117b formed between the two contact spring portions 113a and 113b.
With this configuration, as shown in FIG. 17, the stress absorbing portions 114a and 114b made of curved portions absorb the dimension error in the direction connecting the contacts 112a and 112b formed on the two contact spring portions 113a and 113b, that is, the Y direction. It is possible.

  Further, a dimension error in the direction connecting the two contact springs 113a and 113b and the leg portions 115a and 115b, that is, the X direction can be absorbed by the area of the blade.

  Further, as shown in FIG. 18, the dimensional error in the Z direction can be absorbed by the area of the blade.

  Further, since the terminal portions 116a and 116b constitute free ends, dimensional errors in the X direction and the Y direction can be absorbed.

  Furthermore, in FIG. 18 (a), gold plating is applied to the region R at the tip end portions of the terminal portions 116a and 116b, and connection to the substrate 200 (see FIG. 6) is possible.

  As shown in FIGS. 14 and 15, this battery pack includes a battery main body 100, a battery socket 10 attached to the battery main body 100, and a blade unit 20 attached to a mobile phone casing or substrate. It is detachably installed on the body or substrate. Then, dimensional errors due to floating in the XYZ direction, particularly the Y direction, are absorbed, and as shown in FIGS. 15A and 15B, the electrical connection and the mechanical connection can be stably performed. It is configured. Further, it is possible to absorb any displacement, vibration, and drop impact in any direction of the XYZ directions.

Then, as shown in FIG. 19, the leg portions 115 a and 115 b including the stress absorbing portions 114 a and 114 b that are curved portions constituting the floating spring are connected by a fixing portion 111. That is, since the clip-type contact spring portions 113a and 113b are connected at the base portion, the stress of the leg portions 115a and 115b is not transmitted to the contact spring portions 113a and 113b, thereby realizing a stable contact force. can do.
Further, as shown in FIG. 20, for example, when the blade portion is shifted in the direction of the connecting portion Q12, the two leg portions 115a and 115b including the stress absorbing portions 114a and 114b and the fixing portion 111 Of the connecting portions 118, one of the connecting portions Q11 is deformed so that the leg portion 115a extends left and right, and the other connecting portion Q12 is deformed so that the leg portion 115b contracts left and right. Only the connecting portion 118 receives the force from the legs 115a and 115b, and the contact force does not become unstable due to the change in the floating amount.

(Embodiment 4)
As a fourth embodiment, a modified example of the contact of the connector used in the battery pack will be described.
As shown in FIGS. 21 (a) and 21 (b), the contact of the connector according to the present embodiment is formed with a notch C in the connecting portion 118 between the fixing portion 111 and the legs 115a and 115b, and a floating spring is provided. The length of the leg portions 115a and 115b, that is, the spring length, is substantially increased.
With this configuration, when the blade and the connector described in the first and second embodiments are connected, it is possible to increase elasticity and realize a more flexible floating effect.

DESCRIPTION OF SYMBOLS 10 Battery socket 11 Socket contact 111 Fixing part 112a, 112b Contact 113a, 113b Contact spring part 114a, 114b Stress absorption part 115a, 115b Leg part 116a, 116b Terminal part 118 Connection part 12 Socket housing 20,120 Blade part 21,121 Blade body 22, 122 Blade housing

Claims (8)

For a contact with two contacts located opposite each other,
A blade having a blade body inserted into the space so as to make electrical contact and mechanical contact with the contact;
The blade main body is a blade provided with a concave portion at least in a portion in contact with the contact. The blade according to claim 1,
The concave portion is a blade whose contour is formed smaller than the contact point. The blade according to claim 1 or 2,
The said recessed part is a braid | blade which is a long groove formed so that a longitudinal direction may follow the insertion direction of the said braid | blade between the said contact. The blade according to claim 3, wherein
The long groove is a blade composed of a plurality of grooves arranged in parallel to each other. The blade according to claim 3 or 4, wherein
The long groove is a blade composed of a plurality of continuously arranged grooves. The blade according to claim 5, wherein
The cross section of the long groove is a blade having a triangular shape with the opening side as a base. The blade according to any one of claims 1 to 6,
A blade in which a plurality of the blade bodies are arranged parallel to each other at a predetermined interval. A blade according to any of claims 1 to 7,
A connector set comprising at least one contact with which the blade is inserted,
The contact is
A contact spring portion having two contacts arranged opposite to each other;
A fixing portion for connecting the two contact spring portions;
Two legs connected to the fixed part and provided with a stress absorbing part;
A connector set in which the leg portion constitutes a terminal for electrical connection.

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