JPH0119830Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in pin jacks, particularly pin jacks used in electronic equipment such as video tape recorders and radio tape recorders.

In conventional pin jacks of this type, the built-in movable switch contact has a complicated shape and has the disadvantage that a lot of waste is generated when punching and forming the contact. In addition, conventional pin jacks have the disadvantage that the inserted plug is not locked and can easily come out.

An object of the present invention is to provide a pin jack that is equipped with a movable switch contact that can suppress the occurrence of material waste and that can reliably lock the plug.

In the pin jack according to the present invention, a switching chamber whose deepest part reaches inside the protrusion is formed in a pin jack body having a protrusion, and the switching chamber is communicated with the switching chamber and located at the center of the protrusion of the pin jack body. A plug insertion hole is provided through the L
A switch fixed contact is made of a letter-shaped metal plate, one end of which serves as a fixed contact, and the other end serves as a terminal leg, and is incorporated into the pin jack body. The terminal leg is formed on one side centered on the cut line, and the other side is folded back to the side opposite to the terminal leg to form a curved movable spring piece, a part of which comes into contact with and separates from the fixed contact. a switch movable contact that is a movable contact and is incorporated in the pin jack body, and the movable spring piece is provided with a plug guide part that is inclined with respect to the plug inserted into the plug insertion hole; The plug guide part is located in the deepest part of the switching chamber, and the movable spring piece part is arranged along a direction perpendicular to the plug insertion direction and is pushed by the plug insertion and can be elastically displaced in the plate thickness direction. It is characterized by this.

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3. As shown in the figure, the pin jack of this embodiment has a pin jack body 1 in the form of a rectangular block, and a cylindrical protrusion 2 is integrally provided on the surface side of the pin jack body 1. These pin jack bodies 1 and their protrusions 2 are molded from plastic. A switching chamber 3 is provided in the pin jack body 1 with an opening on the back surface thereof. The deepest part 3A of this switching chamber 3 reaches into the protrusion 2. A plug insertion hole 4 is formed in the center of the protrusion 2 and communicates with the switching chamber 3. An L-shaped first contact installation groove 5 is formed on one side of the pin jack body 1, and a switch fixed contact 6 is installed in the first contact installation groove 5. This switch fixed contact 6 is made of an L-shaped metal plate, and one end of the plate serves as a fixed contact 6A, and the other end serves as a terminal leg 6B. The fixed contact 6A is made to protrude outside, and the fixed contact 6A is made to protrude into the switching chamber 3. On the other side inside the pin jack body 1 is a switch fixed contact 6.
A second contact installation groove 7 is formed in a direction parallel to the terminal leg portion 6B, and a switch movable contact 8 is installed in the second contact installation groove 7. This switch movable contact 8 has a cut line 9 cut halfway along the length of the metal plate, and one side centered on the cut line 9 becomes a terminal leg portion 8A.
The other side becomes a curved movable spring piece 8B that is folded back to the side opposite to the terminal leg 8A, and a part of this movable spring piece 8B becomes a movable contact 8C that comes into contact with and separates from the fixed contact 6A, and the movable spring piece A plug guide portion 8D that projects obliquely toward the plug insertion hole 4 is connected to the portion 8B. In such a switch movable contact 8, the curved intermediate portion of the movable spring piece 8B protrudes into the switching chamber 3, and the terminal leg 8A side is inserted into the second contact installation groove 7 to connect the pin jack. It is incorporated into the body 1. In this state, the movable spring piece 8B of the switch movable contact 8 is arranged along the direction perpendicular to the insertion direction of the plug, and can be freely displaced according to the insertion and removal of the plug by utilizing the spring elasticity in the plate thickness direction. Plug guide part 8D is switching chamber 3
This deepest portion 3A reaches into the protrusion 2. Pin jack body 1
A locking material accommodation groove 13 is provided on one side of the inside in a direction parallel to the terminal leg portion 6B of the switch fixed contact 6.
In addition, a pair of opposing clamping piece housing grooves 10 are formed in the protrusion 2 along the plug insertion hole 4, and a plug locking material 11 is installed in these grooves 10, 13. Plug lock material 11
is made of a metal plate, and a pair of clamping pieces 11B are continuously protruded from the locking material base 11A on the plate surface, and the boundary portion of these clamping pieces 11B with the locking material base 11A is in contact with the locking material base 11A. These clamping pieces 11B are bent in an inclined state and
is bent at the middle part, and the tip side is oriented in a direction that is aligned with the plug insertion hole 4. A locking portion 11C is provided on both the clamping pieces 11B, 11B in a direction that projects into the plug insertion hole 4. Such a plug lock material 11 is assembled into the pin jack body 1 by fitting the locking material base 11A into the locking material accommodating groove 13 and inserting the clamping piece 11B into the clamping piece accommodating groove 10. A grounding sleeve 12 is fitted to the outer periphery of the protrusion 2, and this grounding sleeve 12
The terminal leg portion 12A projects from the other terminal leg portions 6B and 8A in the same direction.

In such a pin jack, when the plug is inserted into the plug insertion hole 4, the plug rides on the movable spring piece 8B along the plug guide part 8D, and the movable spring piece 8B is pushed by the plug and restored. By freely elastically displacing, the movable contact 8C separates from the fixed contact 6A, and conversely, the plug and the movable spring piece 8B become electrically connected. Further, in this state, the locking portions 11C of both clamping pieces 11B of the plug locking material 11 are engaged with the neck of the plug, thereby locking the plug.

As explained above, in the pin jack according to the present invention, the movable switch contact has a cut line halfway along the length of the metal plate, and one side becomes the terminal leg around the cut line, and the other side becomes the terminal leg. Since the side is folded back to the side opposite to the terminal leg to form a curved movable spring piece, and the tip becomes a movable contact, it is possible to suppress the occurrence of material waste during punching and forming.
Cost reduction can be achieved. In addition, in this case, the movable spring piece is oriented perpendicular to the plug, but since the movable spring piece is provided with a plug guide part in an inclined state, it is easy for the plug to ride on the movable spring piece. Therefore, the movable spring piece can be operated reliably by the plug. Furthermore, in this invention,
The plug guide part is located and housed in the deepest part of the switching chamber that reaches into the protruding part, and the movable spring piece of the switch movable contact is arranged in a direction perpendicular to the insertion direction of the plug, making it easy to insert the plug. Even if the spring span of this movable spring piece is increased compared to the case where the movable spring piece is arranged parallel to the Since there is no delay, it is possible to use a large spring and set it so that the contact timing with the inserted plug is early, and by increasing the spring span, it is possible to ensure the displacement of the movable contact when the plug is inserted or removed. and the insertion/extraction force of the plug is stable.
Moreover, the pin jack body can be made thinner, and it is also advantageous in terms of material removal.

[Brief explanation of the drawing]

FIG. 1 is a rear view of an embodiment of the pin jack according to the present invention, FIG. 2 is a vertical cross-sectional view taken along the line X-X in FIG. 1,
FIG. 3 is a perspective view of the assembled state of each contact and plug lock material in the pin jack of this embodiment. 1...Pin jack body, 2...Protrusion, 3
... Switching chamber, 3A ... Deepest part, 4 ... Plug insertion hole, 6 ... Switch fixed contact, 6
A... Fixed contact, 6B... Terminal leg, 8... Switch movable contact, 8A... Terminal leg, 8B...
...Movable spring piece part, 8C...Movable contact, 8D...Plug guide part, 9...Cut line, 11...Plug lock material, 11A...Lock material base, 11B...Pinching piece, 12...Earth sleeve, 12A...Terminal leg.

Claims (1)

[Scope of utility model registration request] A switching chamber is formed in a pin jack body having a protrusion, the deepest part of which reaches into the protrusion, and is communicated with the switching chamber to penetrate through the center of the protrusion of the pin jack body to form a plug insertion hole. A switch fixed contact is provided, and is made of an L-shaped metal plate, with one end of the plate serving as a fixed contact and the other end serving as a terminal leg, and the switch fixed contact being incorporated into the pin jack body, and a cut line in the metal plate. When inserted halfway, one side centered on the cut line becomes a terminal leg, and the other side is folded back to the opposite side from the terminal leg to become a curved movable spring piece, a part of which becomes the fixed contact. The movable spring piece is provided with a plug guide portion that is inclined with respect to the plug inserted into the plug insertion hole, and serves as a movable contact that moves toward and away from the switch movable contact incorporated in the pin jack body. The plug guide part is located in the deepest part of the switching chamber, and the movable spring piece part is arranged along a direction perpendicular to the plug insertion direction and is pushed by the plug insertion to be elastically displaced in the plate thickness direction. A pin jack that is characterized by its flexibility.