JP4972512B2 - Terminal bracket connection structure - Google Patents

Description

  The present invention relates to a connection structure for a terminal fitting.

2. Description of the Related Art Conventionally, a terminal metal connection structure that connects a male terminal metal fitting provided with a round bar-shaped pin and a female terminal metal fitting provided with a cylindrical portion into which the pin is inserted is known (see Patent Document 1). In this device, a slit is provided in the cylindrical portion, and a ring spring is externally fitted to the outer peripheral surface of the cylindrical portion, thereby urging the cylindrical portion in the diameter reducing direction. A pin is inserted into the cylindrical portion, and the inner wall of the cylindrical portion and the outer peripheral surface of the pin are elastically contacted by the elastic force of the ring spring fitted around the cylindrical portion.
JP-A-10-270110

  However, according to said structure, since the pin has comprised the round bar shape, it rotates easily in the direction in alignment with the circumferential direction of a pin within a cylinder part. Then, there is a concern that the outer peripheral surface of the pin and the inner wall of the cylinder portion rub against each other, and the outer peripheral surface of the pin or the inner wall of the cylinder portion may be scraped. Then, we are anxious about the contact resistance of a pin and a cylinder part increasing.

  This invention is completed based on the above situations, Comprising: It aims at providing the connection structure of the terminal metal fitting by which it was suppressed that a pin rotates within a cylinder part.

The present invention provides a male terminal fitting having a pin in the shape of a round bar, and a contact portion that protrudes inside the tube portion and contacts the peripheral surface of the pin inside the tube portion into which the pin is inserted. was a connection structure of the terminal fitting to be connected with the female terminal fittings, and in a state in which the pin is inserted into the cylindrical portion, the front Symbol cylindrical portion, the detent protrusion which protrudes into the pin-side provided, on said pin, said detent projection and the receiving portion abutting the direction along the circumferential direction is provided in the pin, the receiving portion, by cutting the surface at the tip of the pin A notch portion formed, wherein the pin is inserted into the cylindrical portion, and the pin is inserted into a normal position in the cylindrical portion when the notch portion comes into contact with the rotation-preventing protrusion. .

According to the present invention, since the receiving portion comes into contact with the anti-rotation protrusion from the direction along the circumferential direction of the pin, it is possible to suppress the rotation of the pin within the cylindrical portion.
Further, the receiving portion can be formed with a simple configuration in which the surface of the pin is cut out.

The following configuration is preferable as an embodiment of the present invention.
The cylindrical portion is formed by bending a metal plate material, and the anti-rotation protrusion is formed by bending the metal plate material constituting the cylindrical portion.

  According to said structure, a rotation prevention protrusion can be easily formed by bending the metal plate material which comprises a cylinder part.

The pin receives a resilient force and contacts the contact portion .

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that a pin rotates within a cylinder part in the connection structure of a terminal metal fitting.

  An embodiment of the present invention will be described with reference to FIGS. This embodiment is a connection structure of a terminal metal fitting that connects a male terminal metal fitting 11 provided with a pin 10 and a female terminal metal fitting 13 provided with a cylindrical portion 12 in which the pin 10 is accommodated.

  The male terminal fitting 11 is made of a copper alloy and has an elongated shape in the left-right direction in FIG. The surface of the male terminal fitting 11 is plated with, for example, tin in order to reduce the contact resistance with the female terminal fitting 13. The male terminal fitting 11 is provided with a device connecting portion 14 connected to a device (not shown) at the left end in FIG. The device connection portion 14 is provided with a screw hole 15 that opens to the left in FIG. A bolt (not shown) is screwed into the screw hole 15 so that the terminal of the device and the male terminal fitting 11 are electrically connected.

  As shown in FIG. 3, a flange 16 protruding outward is formed on the outer peripheral surface of the device connection portion 14. A base 17 is formed on the right side of the flange 16 in FIG. As shown in FIG. 4, the base portion 17 has a hexagonal cross-sectional shape.

  A pin 10 having a round bar shape is formed on the right side of the base portion 17 in FIG. As shown in FIG. 4, the cross-sectional shape of the pin 10 is circular. A tip end (right end in FIG. 3) of the pin 10 is formed with an inclined surface 19 having a slightly tapered shape. The inclined surface 19 guides the pin 10 into the cylinder portion 12.

  The female terminal fitting 13 is formed by pressing a developed copper alloy plate as shown in FIG. The surface of the female terminal fitting 13 is plated with, for example, tin in order to reduce the contact resistance with the male terminal fitting 11. As shown in FIG. 1, the female terminal fitting 13 includes a barrel portion 21 for crimping the core wire 20 of the electric wire, and a cylindrical portion 12 extending to the left in FIG.

  As shown in FIGS. 1 and 2, the cylindrical portion 12 is formed in a cylindrical shape by bending a pair of side walls 23 upward from the bottom wall 22 and further bending the ceiling wall 24 inward. .

  An opening 25 into which the above-described male terminal fitting 11 is inserted is provided at the left end in FIG.

  As shown in FIG. 2, the side wall 23 includes a lower side wall 23A extending from the bottom wall 22 diagonally upward and left and right in FIG. 2, and an upper side wall 23B that is bent from the lower side wall 23A and extends upward in FIG. Consists of.

  On the inner surface of the lower side wall 23A, two contact portions 27 extending in the left-right direction in FIG. 1 are formed by knocking out from the outer surface side.

  As shown in FIG. 7, the cylindrical portion 12 is engaged with an engaging portion 28 of a spring member 26, which will be described later, from the upper end portion of the lower side wall 23A to the upper side wall 23B near the center in the left-right direction in FIG. A joint hole 29 is formed so as to penetrate the metal plate material constituting the cylindrical portion 12.

  As shown in FIG. 2, the ceiling wall 24 is formed by bending the upper end portions of the pair of upper side walls 23B inwardly and attaching both end edges thereof. The ceiling wall 24 is provided with a lance hole 30 that engages with a lance formed in a housing (not shown) near the center in the left-right direction in FIG.

  As shown in FIGS. 6 and 7, a spring member 26 made of a metal plate material is accommodated in the cylindrical portion 12. The spring member 26 has a substantially rectangular shape. As shown in FIG. 7, the spring member 26 has a generally mountain shape that bulges downward in FIG. 7 when viewed from the side. As shown in FIG. 1, the left and right ends of the spring member 26 in FIG. 1 are in contact with the inner surface of the ceiling wall 24 from below. The spring member 26 is provided with engaging portions 28 that protrude in the vertical direction from the upper and lower end edges in FIG. The engagement portion 28 is accommodated in the engagement hole 29 described above. The height dimension of the engagement hole 29 in the vertical direction in FIG. 7 is set larger than the thickness dimension of the engagement portion 28. Thus, the engaging portion 28 is guided by the inner peripheral wall of the engaging hole 29 and can be displaced in the vertical direction in FIG. In this manner, the engagement portion 28 is displaced in the vertical direction in FIG. 7, so that the spring member 26 can be elastically bent in the vertical direction in FIG. 7.

  As shown in FIG. 2, the upper surface of the pin 10 in FIG. 2 abuts against the spring member 26 from below while the pin 10 of the male terminal fitting 11 is accommodated in the cylindrical portion 12. As a result, the spring member 26 is pressed upward and elastically deformed. Then, the pin 10 is pressed downward by the elastic force of the spring member 26 (see FIG. 1). Thereby, the pin 10 is pressed by the contact part 27 provided in the inner surface of the lower side wall 23A. In this way, the contact portion 27 and the pin 10 of the male tab come into contact with each other so that the male terminal fitting 11 and the female terminal fitting 13 are electrically connected.

  Now, a pair of anti-rotation protrusions 31 and 31 for restricting rotation of the pin 10 accommodated in the cylindrical portion 12 is formed by bending the right end portion in FIG. Is provided. In a state where the pin 10 is inserted into the cylindrical portion 12, the rotation preventing projection 31 is in a state of projecting to the pin 10 side.

  On the other hand, a notch 32 (corresponding to a receiving part) in which the surface of the pin 10 is notched is formed at the upper end in FIG.

  As shown in FIG. 1, in a state where the pin 10 is inserted into the cylindrical portion 12 at the normal position, the left end edge 33 of the notch 32 in FIG. 1 is brought into contact with the anti-rotation protrusion 31 from the right side. It has become. As a result, the pin 10 is restricted from being displaced to the right in FIG.

  As shown in FIG. 1, the lower end edge of the anti-rotation protrusion 31 in FIG. 1 contacts the notch 32 of the pin 10 from above. As shown in FIG. 2, when the pin 10 is about to rotate in the counterclockwise direction shown in the drawing, the notch 32 is located below the lower end edge of the anti-rotation protrusion 31 located on the right side of the drawing (the pin 10 It comes in contact from the direction along the circumferential direction). In addition, when the pin 10 is about to rotate in the clockwise direction in the figure, the notch 32 is located below (in the direction along the circumferential direction of the pin 10) at the lower end edge of the anti-rotation protrusion 31 located on the left side in the drawing. It comes to contact from.

  Next, the operation and effect of this embodiment will be described. When the operator inserts the pin 10 of the male terminal fitting 11 into the cylindrical portion 12 of the female terminal fitting 13, the outer peripheral surface of the pin 10 comes into contact with the spring member 26. Thereby, the spring member 26 is elastically deformed, and the pin 10 is pressed to the contact portion 27 side by the elastic force of the spring member 26. Thereby, the pin 10 and the contact part 27 contact elastically. When the pin 10 is further inserted, the tip of the pin 10 comes into contact with the rotation preventing projection 31.

  At this time, when the pin 10 is inserted into the cylindrical portion 12 in a posture in which the cutout portion 32 of the pin 10 and the rotation preventing projection 31 of the cylindrical portion 12 correspond to each other, the operator The pin 10 is inserted into the cylindrical portion 12 until the left end edge in FIG. 1 abuts against the rotation preventing projection 31 from the left in FIG. Then, the pin 10 is restricted from being displaced to the right, and the pin 10 is accommodated in the normal position in the cylindrical portion 12.

  On the other hand, when the pin 10 is inserted into the cylindrical portion 12 in a posture in which the cutout portion 32 of the pin 10 and the rotation prevention protrusion 31 of the tube portion 12 do not correspond to each other, the rotation prevention protrusion 31 and the cutout portion The pin 10 is rotated until the posture corresponding to 32 is reached. Thereafter, by inserting the pin 10 further into the back, the pin 10 is accommodated in the regular position in the cylindrical portion 12 as described above.

  In this state, when the pin 10 attempts to rotate in the counterclockwise direction in FIG. 2, the cutout portion 32 comes into contact with the lower end edge of the anti-rotation projection 31 from below (the direction along the circumferential direction of the pin 10). As a result, the pin 10 is restricted from rotating counterclockwise. Similarly, when the pin 10 tries to rotate in the clockwise direction in FIG. 2, the notch 32 comes into contact with the lower end edge of the anti-rotation projection 31 from below (in the direction along the circumferential direction of the pin 10), 10 is restricted from rotating in the clockwise direction.

  Thus, according to this embodiment, it can control that pin 10 inserted in cylinder part 12 rotates in the peripheral direction. Thereby, it can control that the pin 10 or the contact part 27 is scraped by rubbing the inner surface of the cylinder part 12 and the outer peripheral surface of the pin 10. As a result, an increase in contact resistance between the male terminal fitting 11 and the female terminal fitting 13 can be suppressed.

  When the male terminal fitting 11 and the female terminal fitting 13 are plated to reduce contact resistance as in the present embodiment, when the pin 10 rotates, the outer peripheral surface of the pin 10 or the inner surface of the cylindrical portion 12 is plated. May come off. Then, we are anxious about the contact resistance of the male terminal metal fitting 11 and the female terminal metal fitting 13 increasing. Thus, this embodiment is particularly effective when the male terminal fitting 11 or the female terminal fitting 13 is plated.

  Moreover, according to this embodiment, the rotation prevention protrusion 31 can be easily formed by bending the metal plate material which comprises the cylinder part 12. FIG.

  Furthermore, according to the present embodiment, the receiving portion can be formed with a simple configuration in which the surface of the pin 10 is cut out.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention .
(1 ) In this embodiment, the spring member 26 is formed separately from the female terminal fitting 13, but is not limited thereto, and may be formed integrally with the female terminal fitting 13.
( 2 ) The male terminal fitting 11 may be configured to be connected to an electric wire. The female terminal fitting 13 may be configured to be connected to a device.

Side sectional view showing a connection structure between a male terminal fitting and a female terminal fitting according to the present embodiment AA line sectional view in FIG. Side view of male terminal fitting Front view of male terminal fitting Exploded view of female terminal fitting Top view of female terminal fitting Side view of female terminal fitting

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Pin 11 ... Male terminal metal fitting 12 ... Tube part 13 ... Female terminal metal fitting 27 ... Contact part 31 ... Anti-rotation protrusion 32 ... Notch part (receiving part)

Claims (3)

A male terminal fitting having a pin in the shape of a round bar, and a female terminal provided with a contact portion that protrudes inward of the cylindrical portion and contacts the peripheral surface of the pin inside the cylindrical portion into which the pin is inserted a connecting structure of the terminal fitting to be connected with fittings, and in a state in which the pin is inserted into the cylindrical portion, the front Symbol cylindrical portion, the detent protrusion is provided protruding the pin side, the the pin has receiving portion is provided in contact from the direction along the circumferential direction of the pin and the detent projections,
The receiving part is a notch part formed by notching the surface of the tip part of the pin, and when the pin is inserted into the cylinder part and the notch part comes into contact with the anti-rotation projection part, the pin becomes the cylinder. A terminal fitting connection structure, wherein the terminal fitting is inserted into a normal position within the section . The said cylinder part is formed by bending a metal plate material, and the said rotation prevention protrusion is formed by bending the said metal plate material which comprises the said cylinder part. Terminal fitting connection structure. The terminal fitting connection structure according to claim 1 , wherein the pin receives an elastic force and contacts the contact portion .

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