JP4933325B2 - Connection terminal structure - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a connection terminal structure that is electrically connected to a connected terminal, and in particular, a connection terminal structure that can be securely connected even if there is a displacement due to a manufacturing error or the like when mated with the connected terminal. About.

  2. Description of the Related Art Conventionally, a connector combining male and female terminals for electrical connection between a cable and a board is known. In connectors for connecting antennas for vehicles such as automobiles and external devices such as receivers, it is necessary to prevent changes in characteristics due to vehicle vibrations. It is known that a pinched terminal in which a male terminal is pinched by a female terminal is more reliable than a spring terminal in a state of being present. Normally, each terminal is provided in a plug and a socket, respectively, and the terminals are electrically connected by fitting the plug into the socket.

  However, if the position of each terminal is misaligned due to manufacturing errors, etc., when the plug is fitted into the socket, each terminal may not be fitted at the correct position, and an excessive force may be applied to the terminal. It was. For example, in the case of a terminal directly attached to a circuit board with solder, a crack may occur in the solder or the terminal may break due to such an excessive force.

  Accordingly, various floating connectors have been developed that are capable of stable electrical connection even when positional deviation occurs (for example, Patent Document 1 and Patent Document 2).

JP 2000-164111 A JP 2002-093502 A

  However, any of the conventional floating connectors has a complicated structure and is difficult to reduce in size. For example, connection connectors for digital terrestrial antennas have been developed with built-in amplifiers inside, but the amplifier circuit board built into the microminiature connector has been extremely miniaturized. There was no space to include. In addition, there has been no floating connector structure in which the characteristic change due to the vibration of the vehicle hardly occurs.

  As described above, it has been desired to develop a connection terminal structure capable of reliably making an electrical connection even when there is a displacement in the connection with a circuit board connection mechanism built into a micro connector.

  In view of such circumstances, the present invention is intended to provide a connection terminal structure that can be surely electrically connected to a connected terminal even if there is a positional shift.

  In order to achieve the above-described object of the present invention, a connection terminal structure according to the present invention includes a through hole provided in a substrate, a conduction region provided in the vicinity of the through hole, and a terminal portion loosely fitted in the through hole. And a terminal portion having an overhanging portion that comes into electrical contact with the conduction region by the biasing force from the connected terminal side in a state where the terminal portion is fitted to the connected terminal.

  Here, the conduction region may be any contact land provided on the surface of the substrate on the connected terminal side.

  Further, the conduction region is composed of a connection land provided on the surface facing the connected terminal side of the substrate and a conductive lid electrically connected and fixed to the connection land. It may be in electrical contact with the conductive lid.

  Furthermore, the terminal part may have an elastic part.

  Furthermore, the terminal portion is loosely fitted in the through hole so as to be movable in a uniaxial direction parallel to the surface of the substrate, and the fitting portion between the terminal portion and the connected terminal is orthogonal to the uniaxial direction parallel to the surface of the substrate. It may be configured to be movable in the axial direction.

  The connection terminal structure of the present invention has an advantage that it can be easily miniaturized because of its simple structure, and can be reliably electrically connected to the connected terminal.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining a first embodiment of the connection terminal structure of the present invention. 1A is a cross-sectional view of the state before the connection terminal structure is connected to the connected terminal, and FIG. 1B is a cross-sectional view of the state after the connection terminal structure is connected to the connected terminal. 1 (c) is a perspective view of the state of FIG. 1 (b), FIG. 1 (d) is a back view of the state of FIG. 1 (b), and FIG. 1 (e) is when a displacement occurs. The cross-sectional views of FIG.

  As shown in the figure, the connection terminal structure 10 of the present invention performs electrical connection by fitting with the connected terminal 20. The connection terminal structure 10 is mainly composed of a terminal portion 11 made of a conductive member. The terminal portion 11 is formed in a concave shape by bending a plate-like member, and is loosely fitted in a through hole 13 provided in the substrate 12. A contact land 14 is provided as a conduction region in the vicinity of the through hole 13 provided in the substrate 12, more specifically, on the surface of the substrate 12 on the contacted terminal 20 side (in the illustrated example, the back surface side of the substrate 12). It has been. The contact land 14 is connected to an output line of an electric circuit on the substrate 12. The contact land 14 may be formed at the same time as the circuit pattern is formed on the substrate, or may be configured using a conductive member separately.

  The terminal portion 11 is provided with an overhang portion 15 that is in electrical contact with the contact land 14. Furthermore, in order to prevent the terminal portion 11 from falling out of the through hole 13 of the substrate 12, the locking portion 16 is bent. That is, the terminal portion 11 is configured to sandwich the front and back surfaces of the substrate 12 between the locking portion 16 and the overhanging portion 15.

  The terminal portion 11 is a flexible member. When the terminal portion 11 is fitted into the through-hole 13 of the substrate 12, the terminal portion 11 is inserted from the back surface side of the substrate 12, and an end knob of the locking portion 16. The terminal portion 11 is locked to the substrate 12 by pinching 17 and releasing the end knob 17 after passing the locking portion 16 through the through-hole 13.

  When the connecting terminal structure 10 is fitted to the connected terminal 20, the overhanging portion 15 comes into electrical contact with the contact land 14 by the biasing force. Usually, the connection terminal structure 10 is provided on one side of the plug and the socket, and the connected terminal 20 is provided on the other side of the plug and the socket, and is locked and securely fixed when the plug is fitted into the socket. It has a structure. Therefore, in a state where the plug is fitted in the socket, as shown in FIG. 1B, the connected terminal 20 and the connecting terminal structure 10 are fitted, and further, the attachment from the connected terminal 20 side is performed. Since the force is generated, the overhanging portion 15 reliably maintains the contact state with the contact land 14.

  A portion of the terminal portion 11 that is inserted into the through hole 13 is formed slightly smaller than the through hole 13, and the terminal portion 11 is configured to be loosely fitted into the through hole 13. More specifically, as shown in FIG. 1 (d), the portion where the terminal portion 11 is inserted is formed so that the size in the longitudinal direction parallel to the surface of the substrate 12 is smaller than the through-hole 13. The terminal portion 11 is configured to be movable only in the longitudinal direction parallel to the surface of the substrate 12. Further, since the terminal portion 11 is bent so as to have a U-shaped opening with respect to the connected terminal 20, the fitting portion between the terminal portion 11 and the connected terminal 20 is the surface of the substrate 12. It is configured to be movable in the direction of the short side parallel to. As a result, the fitting portion between the terminal portion 11 and the connected terminal 20 can be moved in any direction parallel to the surface of the substrate 12. In the illustrated example, an example in which the terminal portion 11 is configured to be movable only in the longitudinal direction parallel to the surface of the substrate 12 is shown. However, the present invention is not limited to this and is parallel to the surface of the substrate 12. It may be configured to be movable in the short side direction.

  In the connection terminal structure 10 of the present invention, since the terminal portion 11 is loosely fitted to the substrate 12, the terminal portion 11 is in a free state before the connection terminal structure 10 and the connected terminal 20 are fitted. It is. Accordingly, when the connecting terminal structure 10 of the present invention is fitted to the connected terminal 20, even if there is a displacement due to a manufacturing error or the like, the terminal portion 20 is in a loose fitting state before fitting. The terminal part 20 moves. Then, after the fitting, as shown in FIG. 1 (e), the terminal portion 11 is securely fitted with the connected terminal 20 in a moved state, and the overhanging portion 15 is applied by the urging force from the connected terminal 20 side. Is reliably in electrical contact with the contact land 14. Therefore, the connected terminal 20 is not damaged, and the terminal portion 11 is not fixed to the substrate by soldering or the like, so that problems such as solder cracks do not occur.

  In the connection terminal structure 10 shown in FIG. 1, the protruding portion 15 is bent into a spring shape so as to have elasticity. Therefore, when a positional deviation occurs, it is possible to absorb the positional deviation by using not only the movement of the terminal portion 11 due to loose fitting but also the deformation due to the elastic action of the overhanging portion 15.

  In the connection terminal structure 10 shown in FIG. 1, the example in which the terminal portion 11 is a concave female terminal and the connected terminal 20 is a convex male terminal is described, but the present invention is not limited thereto, As shown in the cross-sectional view of FIG. 2, the terminal portion 11b of the connecting terminal structure 10b may be formed as a convex male terminal and the connected terminal 20b may be formed as a concave female terminal by bending. Even in this case, since the terminal portion 11b is loosely fitted in the through hole 13 of the substrate 12, the terminal portion 11b and the connected terminal 20b are reliably electrically connected even if there is a positional shift.

  In addition, the terminal portion 11 shown in FIG. 1 is formed in a concave shape by bending a conductive plate-like member and also has an overhang portion 15, but the present invention is not limited to this, and the conductive portion It may be formed by cutting out the property member. FIGS. 3A and 3B are diagrams for explaining examples of other shapes of the terminal portion 11, FIG. 3A is a transverse sectional view thereof, and FIG. 3B is a perspective view thereof. As illustrated, a protruding portion 15c and a locking portion 16c are integrally formed on the terminal portion 11c of the connection terminal structure 10c. Even in such a connection terminal structure, the terminal portion 11c is loosely fitted to the substrate 12 as in the example of FIG.

  In the above illustrated example, the terminal structure in which the connected terminal is sandwiched from both sides is shown. However, the present invention is not limited to this, and the terminal may be configured to be sandwiched by using a plurality of terminals. . 4A and 4B are diagrams for explaining an example in which the connection terminal structure 10d has a three-terminal structure. FIG. 4A is a bottom view and FIG. 4B is a cross-sectional view thereof. As illustrated, the terminal portion 11d of the terminal structure 10d has a three-terminal structure, and has a structure in which the connected terminal 20 is sandwiched from three directions. Even in such a structure, since the terminal portion 11d is loosely fitted in the through hole 13 of the substrate 12, the terminal portion 11d and the connected terminal 20 are surely electrically connected even if there is a misalignment. .

  Next, a second embodiment of the connection terminal structure of the present invention will be described. In the connection terminal structure of the first embodiment described above, the conduction region is provided by the contact land 14 provided on the surface of the substrate 12 on the connected terminal 20 side. The conductive land is provided by the connection land 24 provided on the surface facing the connected terminal 20 side of 12 and the conductive lid 25. FIG. 5 is a view for explaining a second embodiment of the connection terminal structure of the present invention. 5A is a cross-sectional view of the connection terminal structure connected to the connected terminal, FIG. 5B is a cross-sectional view in the direction perpendicular to FIG. 5A, and FIG. FIG. 5D is a perspective view, FIG. 5D is a perspective view with the conductive lid removed, and FIG. 5E is a back view.

  As shown in the figure, the connection terminal structure 30 of the second embodiment of the present invention performs electrical connection by fitting with the connected terminal 20. The connection terminal structure 30 includes a terminal portion 21 made of a conductive member and a conductive lid 25 as main components. As in the first embodiment, the terminal portion 21 is formed in a concave shape by bending a plate-like member, and is loosely fitted in the through hole 13 provided in the substrate 12. In the vicinity of the through-hole 13 provided in the substrate 12, more specifically, on the surface of the substrate 12 facing the contacted terminal 20 side (on the surface side of the substrate 12 in the illustrated example), there is a conduction region. The connection land 24 which comprises a part of is provided. The connection land 24 is connected to an output line of an electric circuit on the substrate 12. A conductive lid 25 is provided so as to be electrically connected and fixed to the connection land 24. That is, the conductive lid 25 is fixed to the connection land 24 by soldering. The terminal portion 21 is provided with a protruding portion 28 that protrudes in the lateral direction and is formed into a corrugated shape. As shown in FIG. 5A, when the connecting terminal structure 30 is fitted to the connected terminal 20, the overhanging portion 28 is in electrical contact with the conductive lid 25 by the biasing force. In the illustrated example, the protruding portion 28 has a corrugated shape, but the present invention is not limited to this, and the protruding portion 28 is in electrical contact with the conductive lid 25 by the biasing force from the connection terminal structure 30 side. Any shape can be used as long as it is configured.

  Since the overhanging portion 28 is disposed in a free state between the substrate 12 and the conductive lid 25 before the connection terminal structure 30 is fitted to the connected terminal 20, it is shown in FIG. Thus, the terminal part 21 is comprised so that loose fitting is possible on either side. As a result, like the first embodiment, the terminal portion 21 and the connected terminal 20 are reliably electrically connected even if there is a positional shift. In the illustrated example, the overhanging portion 28 is disposed with a space between the substrate 12 and the conductive lid 25, but the present invention is not limited to this, and the terminal is connected to the connected terminal 20. As long as the part 21 is configured to be movable, the projecting part 28 may be configured to be sandwiched between the substrate 12 and the conductive lid 25.

  In the connection terminal structure 30 according to the second embodiment of the present invention, first, the terminal portion 21 is inserted into the through hole 13 provided in the substrate 12 from the upper surface of the substrate, and the conductive lid 25 is covered from above. What is necessary is just to assemble by soldering to the connection land 24. FIG.

  As in the first embodiment, the portion of the terminal portion 21 that is inserted into the through hole 13 is formed slightly smaller than the through hole 13, and is configured so that the terminal portion 21 is loosely fitted into the through hole 13. ing. More specifically, as shown in FIG. 5E, the portion into which the terminal portion 21 is inserted is formed so that the size in the longitudinal direction parallel to the surface of the substrate 12 is smaller than the through hole 13. The terminal portion 21 is configured to be movable only in the longitudinal direction parallel to the surface of the substrate 12. Further, since the terminal portion 21 is bent so as to have a U-shaped opening with respect to the connected terminal 20, the fitting portion between the terminal portion 21 and the connected terminal 20 is the surface of the substrate 12. It is configured to be movable in the direction of the short side parallel to. Accordingly, the fitting portion between the terminal portion 21 and the connected terminal 20 can be moved in an arbitrary direction parallel to the surface of the substrate 12. In the illustrated example, the terminal portion 21 is configured to be movable only in the longitudinal direction parallel to the surface of the substrate 12, but the present invention is not limited to this, and is parallel to the surface of the substrate 12. It may be configured to be movable in the short side direction. In the illustrated example, the conductive lid 25 is configured by a plate-like member so as to cover the entire overhanging portion 28, but the present invention is not limited to this. A shape that covers the whole if it is configured to receive the overhanging portion 28 that has received a biasing force from the connected terminal during fitting with the connected terminal and to be in reliable electrical contact with the overhanging portion 28. For example, any shape such as a rod shape or a net shape may be used.

  Even in the connection terminal structure of the second embodiment, the electrical connection is surely maintained, but since the terminal portion 21 itself is not fixed to the substrate by soldering or the like, problems such as solder cracks do not occur. Further, since the overhanging portion 28 is bent into a wave shape in a spring shape so as to have elasticity, not only the movement of the terminal portion 21 due to loose fitting but also the displacement due to the elastic action of the overhanging portion 28 is used to shift the position. It can also be absorbed.

  Further, in the connection terminal structure of the second embodiment, as in the first embodiment, the terminal portion 21 is not limited to the concave female terminal, and may be a convex male terminal. Further, the terminal portion 21 is formed in a concave shape by bending a conductive plate-like member, and an overhang portion 28 is also formed. However, the present invention is not limited to this, and the conductive member is cut out. Or the like. Furthermore, the terminal portion 21 does not necessarily have a structure in which the connected terminal 20 is sandwiched from both sides, and may have a three-terminal structure in which the terminal portion 21 is sandwiched from three directions.

  Note that the connection terminal structure of the present invention is not limited to the illustrated examples described above, and various modifications can be made without departing from the scope of the present invention.

FIG. 1 is a view for explaining a first embodiment of the connection terminal structure of the present invention, and FIG. 1 (a) is a cross-sectional view of the state before the connection terminal structure is connected to the connected terminal. 1B is a cross-sectional view of the state after the connection terminal structure is connected to the connected terminal, FIG. 1C is a perspective view of the state of FIG. 1B, and FIG. FIG. 1B is a back view of the state of FIG. 1B, and FIG. 1E is a cross-sectional view when a positional shift occurs. FIG. 2 is a cross-sectional view for explaining an example in which the terminal portion is configured as a convex male terminal and the connected terminal is configured as a concave female terminal. 3A and 3B are diagrams for explaining examples of other shapes of the terminal portion, in which FIG. 3A is a cross-sectional view thereof, and FIG. 3B is a perspective view thereof. 4A and 4B are diagrams for explaining an example in which the connection terminal structure has a three-terminal structure. FIG. 4A is a bottom view thereof, and FIG. 4B is a cross-sectional view thereof. FIG. 5 is a view for explaining a second embodiment of the connection terminal structure of the present invention. FIG. 5 (a) is a cross-sectional view of the connection terminal structure connected to the connected terminal. 5B is a transverse cross-sectional view in the direction perpendicular to FIG. 5A, FIG. 5C is a perspective view, FIG. 5D is a perspective view with the conductive lid removed, and FIG. ) Represents the back view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Connection terminal structure 11 Terminal part 12 Board | substrate 13 Through-hole 14 Contact land 15 Overhang | projection part 16 Locking part 17 End knob 20 Terminal to be connected 21 Terminal part 24 Connection land 25 Conductive cover 28 Overhang part 30 Connection terminal structure

Claims (5)

A connection terminal structure that is electrically connected to a connected terminal, the connection terminal structure comprising:
A through hole provided in the substrate;
A conduction region provided in the vicinity of the through hole;
A terminal part loosely fitted in the through-hole, wherein an overhanging part that maintains an electrical contact state with the conduction region by a biasing force from the connected terminal side in a state where the terminal part is fitted to the connected terminal; A terminal portion having,
A connection terminal structure characterized by comprising:

  The connection terminal structure according to claim 1, wherein the conduction region includes a contact land provided on a surface of the substrate on the side of the connected terminal. 2. The connection terminal structure according to claim 1, wherein the conduction region includes a connection land provided on an opposing surface of a surface of the substrate to be connected, and a conductive lid electrically connected and fixed to the connection land. Consists of
The projecting portion of the terminal portion is in electrical contact with the conductive lid.   4. The connection terminal structure according to claim 1, wherein the terminal portion includes an elastic portion. 5. The connection terminal structure according to any one of claims 1 to 4, wherein the terminal portion is loosely fitted into the through hole so as to be movable in a uniaxial direction parallel to the surface of the substrate.
The connecting terminal structure, wherein the fitting portion between the terminal portion and the connected terminal is configured to be movable in an axial direction parallel to the surface of the substrate and orthogonal to the uniaxial direction.