Female terminal metal fixture

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a female terminal fitting.

【0002】

[Conventional technology]

Some female terminal fittings are disclosed in Japanese Patent Application Laid-Open No. 58-87789. As shown in FIG. 6, this is a separate body from the terminal body 1 and the terminal body 1 formed by coupling the square tubular fitting portion 3 to the barrel portion 2 to which the electric wire (not shown) is crimped. It is composed of a spring piece 4 attached to the fitting portion 3 as a component. The tab 5 of the male terminal fitting enters along the lower surface (inner surface) of the upper surface plate 3A of the fitting portion 3 and is elastically pressed upward by the spring piece 4, so that the upper surface plate 3A and the tab 5 are predetermined. It is held in a state of surface contact with the contact pressure of.

【0003】

[Problems to be Solved by the Invention]

In the above-mentioned conventional female terminal fitting, the spring piece 4 has a curved shape, and a space is provided below the tab 5 before and after the contact portion 4A in contact with the tab 5 (Fig. 7). See). Therefore, when an external force in the vertical direction acts on the tab 5, the tab 5 tilts like a seesaw around the contact portion 4A of the spring piece 4, and the contact state between the top plate 3A and the tab 5 may become unstable. There is. The present invention has been devised in view of the above circumstances, and an object of the present invention is to improve the contact reliability of the male terminal fitting with the tab.

【0004】

[Means for solving problems]

The invention of claim 1 is for pressing a spring piece capable of pressing the tab against the contact portion and pressing the spring piece against a terminal body having a contact portion capable of contacting a tab of a male terminal fitting entered from the front. It is possible to regulate the movement of the tab against it, and it is configured by assembling a pressing member formed by integrally forming two front and rear movement restricting portions located in front of and behind the contact position with the tab in the spring piece. The pressing member has a frame shape having an upper surface plate portion and left and right side wall portions, and the spring piece has a form in which a central region excluding the peripheral edge of the upper surface plate portion is cut downward. The front side floating restricting portion is formed to extend straight backward by folding back the extending portion from the front edge of the upper surface plate portion with a space downward, and the rear side floating restricting portion is formed by the upper surface plate portion. By folding back the extending part from the trailing edge with a gap downward, the structure is such that it extends straight forward. The invention of claim 2 is the invention of claim 1, wherein the pressing member is formed with a reinforcing portion that regulates the displacement of the floating regulating portion on the front side by engaging with the floating regulating portion on the front side. ..

【0005】

INDUSTRIAL APPLICABILITY

<Invention of claim 1> Even if the tab tries to move against the pressure of the spring piece, the play is regulated by the two front and rear movement restricting portions, so that a proper contact state is maintained between the tab and the contact portion. In addition, since the floating regulation part is arranged at the position on the entry side of the tab rather than the spring piece, when the tab enters diagonally, the tab engages with the movement regulation part before contacting the spring piece to restrict entry. Will be done. That is, the deformation of the spring piece due to the tab hitting diagonally is prevented.

【0006】

BEST MODE FOR CARRYING OUT THE INVENTION

<Embodiment 1> Hereinafter, Embodiment 1 embodying the present invention will be described with reference to FIGS. 1 to 5. The female terminal fitting of the present embodiment is configured by assembling a terminal body 10 and a pressing member 20 formed as separate parts from each other. The terminal body 10 is made by bending a thick (for example, 2 mm) metal plate, and a square tubular fitting portion 11 is formed in the first half portion, and an electric wire (not shown) is crimped in the second half portion. Barrel portion 12 for the purpose is formed. A contact portion 13 is formed on the lower surface plate portion 11L of the fitting portion 11 by raising the bottom of a wide area excluding the peripheral edge thereof. The contact portion 13 sandwiches the tab T of the male terminal fitting with the spring piece 23 described later. Locking holes 14 are formed in the left and right side wall portions 11S of the fitting portion 11, and elastic locking pieces 26 of the pressing member 20, which will be described later, are locked in the locking holes 14. There is. Shallow recesses 15 are formed on both the left and right edges of the opening edge at the front end of the fitting portion 11, and the locking claws 27 of the pressing member 20 are locked in the recesses 15. .. A lance hole 16 is formed in the upper surface plate portion 11U of the fitting portion 11, and when the terminal body 10 is inserted into the cavity of the female side connector housing (not shown), the lance (not shown) is locked in the lance hole 16 to cause a female. The terminal fitting is held in the cavity.

【0007】

The pressing member 20 is formed by bending a metal plate material thinner than the terminal body 10 (for example, 0.3 mm), and has a frame shape having an upper surface plate portion 21 and left and right side wall portions 22. It is designed to be fitted in the fitting portion 11. The width dimension of the top plate portion 21 and the height dimension of the side wall portion 22 are set to be the same as the width dimension and the height dimension inside the fitting portion 11, respectively, and therefore the pressing member 20 is placed in the fitting portion 11. In the assembled state, there is no risk of rattling up, down, left and right. A spring piece 23 is formed in the upper surface plate portion 21 by cutting up a wide area excluding the peripheral edge thereof downward and bending the central portion in the front-rear direction so as to bulge downward. The spring piece 23 extends rearward in a cantilever shape inside the pressing member 20, and is capable of elastic bending. The spring piece 23 comes into contact with the tab T at its lowest contact 23A.

【0008】

Similarly, on the upper surface plate portion 21, the front side floating restricting portion 24F is formed by folding back the extending portion from the front edge thereof with a space downward. The front floating restricting portion 24F extends straight rearward and is set at a position slightly above the contact portion 23A of the spring piece 23. A pair of earpieces 24A are projected on the left and right edges of the front displacement restricting portion 24F, while a pair of reinforcing portions 25 are formed on the left and right side wall portions 22 by cutting up the upper ends thereof inward. By engaging the reinforcing portion 25 with the ear piece 24A so as to press it from above, the upward displacement of the front floating restricting portion 24F is surely regulated. Further, the upper surface plate portion 21 is formed with a rear floating restricting portion 24R by folding back a portion extending from the trailing edge with a space downward. The rear-side movement control unit 24R extends straight forward and is set at the same height as the front-side movement regulation unit 24F.

【0009】

A pair of left and right elastic locking pieces 26 are formed by cutting up at positions corresponding to the locking holes 14 on both side wall portions 22. The elastic locking piece 26 projects diagonally forward and outward in a cantilever shape, and is capable of elastic bending inward. Further, a pair of locking claws 27 are formed on the front end edges of the wall portions 22 on both sides so as to correspond to the recess 15 by projecting at a right angle to the outside. Next, the operation and effect of this embodiment will be described. The female terminal fitting is assembled by fitting the pressing member 20 into the fitting portion 11 of the terminal body 10 from the front. When the pressing member 20 is fitted, the elastic locking piece 26 is elastically flexed inward by engaging with the inner wall surface of the fitting portion 11 in the middle of the fitting. Then, when the pressing member 20 reaches the normal fitting position, the elastic locking piece 26 is restored and displaced outward by the elastic restoring force and is locked to the locking hole 14 from the rear, so that the pressing member 20 is pulled out. Displacement is regulated. At the same time, the locking claw 27 of the pressing member 20 comes into contact with the recess 15 of the terminal body 10, thereby restricting further fitting of the pressing member 20. As described above, the pressing member 20 is inserted into and removed from the terminal body 10 and assembled in a state in which the movement in both directions is restricted.

【0010】

In the assembled state, the distance between the contact portion 13 and the front side floating restricting portion 24F and the rear side floating regulating portion 24R is the same as or slightly larger than the thickness dimension of the tab T. Therefore, when the tab T enters the fitting portion 11 and is elastically sandwiched between the contact portion 13 and the spring piece 23, the lower surface of the tab T is in surface contact with the upper surface of the contact portion 13 and is in surface contact with the upper surface of the contact portion 13. The upper surface of the tab T is in contact with both the front and rear movement control portions 24F and 24R, or is facing with a slight gap. Therefore, even if a vertical tilting force acts on the tab T, the tilting displacement against the pressing of the spring piece 23 of the tab T is related to either the front side floating restricting unit 24F or the rear side floating restricting unit 24R. It is definitely regulated by the case. Therefore, an appropriate contact state is maintained between the tab T and the contact portion 13.

【0011】

Further, when the tab T tries to enter the fitting portion 11 diagonally upward, the tab T contacts the front edge of the front floating restricting portion 24F before contacting the spring piece 23, and further. Entry is restricted. That is, it is prevented that the tab T hits the spring piece 23 so as to be pushed up from diagonally below, and the deformation of the spring piece 23 due to this pushing up is prevented. Since the front floating restricting portion 24F is reinforced by the reinforcing portion 25 so as not to be easily deformed, there is no possibility of deformation even if the tab T hits from the front.

【0012】

Further, in the present embodiment, since the pressing member 20 can be assembled to the terminal body 10 by simply fitting the pressing member 20, the assembling workability is excellent. Further, both the front and rear floating restricting portions 24F and 24R are arranged so as to be sandwiched between the front and rear sides of the spring piece 23, and both the front and rear floating restricting portions 24F and 24R and the spring piece 23 are formed on a common pressing member 20. Since it is designed so that it can be assembled integrally with the terminal body 10, the presence of the floating control units 24F and 24R does not interfere with the assembly of the spring piece 23, and workability is also achieved in this respect. Is excellent.

【0013】

<Other Embodiments> The present invention is not limited to the embodiments described in the above description and drawings, and for example, the following embodiments are also included in the technical scope of the present invention, and other than the following. Various changes can be made within the range that does not deviate from the gist. (1) In the above embodiment, the floating control portion is arranged at both front and rear positions of the spring piece with the contact position with the tab sandwiched between them, but according to the present invention, it may be provided only on the front side, that is, on the approach side of the tab. , May be provided only on the rear side.

【0014】

(2) In the above embodiment, the floating restricting portion is formed by extending from both the front and rear edges of the upper surface plate portion of the pressing member, but according to the present invention, the side wall portion is cut up inward or the front edge of the side wall portion. Alternatively, the floating control portion may be formed by extending inward from the trailing edge.

[Simple explanation of drawings]

[Figure 1]

Sectional drawing of the terminal body of Embodiment 1 [Figure 2]

Plan view of the pressing member of the first embodiment [Fig. 3]

Sectional drawing of the pressing member of Embodiment 1. [Fig. 4]

Cross-sectional view of the state where the terminal body and the pressing member of the first embodiment are assembled. [Fig. 5]

Front view of the state in which the terminal body and the pressing member of the first embodiment are assembled. [Fig. 6]

Perspective view of the conventional example [Fig. 7]

Sectional view of the conventional example [Explanation of symbols]

T ... tab 10 ... Terminal body 13 ... contact 20 ... Pressing member 23 ... Spring piece 24F ... Front side movement control department 24R ... Rear movement control department