JPH035064Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a leaf switch used as a switch for preventing erroneous recording in a tape recorder or as a switch for selecting the type of tape.

(b) Prior Art In a tape recorder, if a tape cassette that has already recorded data is inserted into the tape recorder without the user's knowledge, the previously recorded information will be erased. Therefore, as described in Japanese Utility Model Publication No. 57-52754, when the tape cassette has an accidental erasure prevention claw, the detection lever, which is urged to rotate counterclockwise, hits the claw and rotates. Since the movement is prevented, the blocking plate does not move left or right, and when the record button is pressed, the record slider moves forward and the switch is switched to record mode. However, if the tape cassette does not have a claw, the detection lever will not be obstructed and will rotate, the blocking plate will move left and right, and even if you press the record button, the recording slider will be blocked by the blocking plate and will not move, so the switch will not move. is prevented from being switched to recording mode. As the switch, a leaf switch as described in Japanese Utility Model Publication No. 57-5767 is often used.

(c) Problems to be solved by the invention However, in the case of conventional leaf switches, the tip bends and deforms when it comes into contact with the tape cassette. In order to prevent this, the plate thickness of the movable contact piece of the leaf switch is made thicker, but the thicker the plate, the greater force is required when ejecting the leaf switch, and there is also the problem of reliability during assembly. The present invention aims to solve such problems.

(d) Means for Solving the Problems The leaf switch of the present invention has a movable contact piece and a fixed contact piece that are mounted on a switch frame with their ends spaced apart from each other, an actuating piece is attached to the movable contact piece, and the actuating piece is attached to the switch frame. The present invention relates to a structure of a leaf switch in which the tip of the leaf switch is locked to the switch frame.

(e) Function The leaf switch of the present invention has the tip of the actuating piece attached to the movable contact piece fixed to the switch frame as described above, so that even if the plate thickness of the movable contact piece is made thin, it will not bend. There is no.

(F) Examples The details of the leaf switch of the present invention will be explained according to examples. 1 is a movable contact piece to which a contact 2 is attached and is made of an elastic conductive member; 3 is a movable contact piece to which a contact 4 is attached. , a fixed contact piece made of an elastic conductive member, the movable contact piece 1 and the fixed contact piece 3 are arranged apart from each other so that their contacts 2 and 4 face each other, and their ends are connected to the switch frame 5.
It is fixed at Further, fulcrum members 8 and 9 having triangular tips 6 and 7 are attached to the movable contact piece 1 and the switch frame 5, respectively.
The tips 6 and 7 of 9 are arranged to touch the fixed contact piece 3, respectively, with a slight interval between them. Reference numeral 10 denotes an actuating piece attached to the movable contact piece 1, and the upper surface of the bent tip 11 is connected to the tip bending piece 1 of the switch frame 5.
2, and a pressing protrusion 13 is formed near the tip 11 of the actuating piece 10. 14, 14 are lead terminals.

The leaf switch of this invention has the above-mentioned configuration, and now when the record button is pressed, the slide lever 1
5 in the direction of arrow A, the pressing protrusion 1
3, a force in the direction of arrow A may be applied to the actuating piece 10 and the movable contact piece 1, causing the movable contact piece 1 to bend in the direction of arrow B. However, in the leaf switch of the present invention, since the tip 11 of the actuating piece 10 hits the tip bending piece 12 of the switch frame 5, it does not bend even if the movable contact 10 is thin. When the slide lever 15 is pushed further, the slide lever 15 hits the inclined surface of the pressing protrusion 13.
A force in the direction of arrow C acts on the actuating piece 10 and the movable contact piece 1. In addition, the fixed contact piece 3 is thereby connected via the fulcrum member 8.
Since a force in the direction of arrow C is also applied to the distal end of the movable contact piece 1, a force in the direction of arrow B acts on the movable contact piece 1 with the fulcrum member 8 and the fulcrum member 9, which is spaced apart, acting as a boundary. Therefore, the movable contact piece 1 moves in the direction of arrow C, and the fixed contact piece 3 moves in the direction of arrow B, joining the contacts 2 and 4 and turning on the leaf switch.

When the recording is completed and the slide lever 15 is returned to its original position, the force applied to the movable contact piece 1 and the fixed contact piece 3 is removed, and the movable contact piece 1 and the fixed contact piece 3 are returned to their original positions by their own elastic force.

(g) Effects of the invention As mentioned above, the leaf switch of the invention is designed so that the tip of the operating contact piece attached to the movable contact piece is locked to the bending piece at the tip of the switch frame, so that the plate thickness of the movable contact piece can be reduced. Even if you make it thinner, it will not bend.

In addition, the fulcrum member is attached to the movable contact piece and the switch frame so that each of the movable contact piece and the switch frame has a triangular shape and its tips abut the fixed contact piece from above and below with a slight distance between them. When pressed, the movable contact piece bends downward, and the fixed contact piece is subjected to an upward bending force via the fulcrum member, causing the fixed contact piece to bend upward. The contacts can make sufficient contact.

[Brief explanation of drawings]

FIG. 1 is a side view of the leaf switch of the present invention, and FIG. 2 is a perspective view of the leaf switch of the present invention. DESCRIPTION OF SYMBOLS 1... Movable contact piece, 3... Fixed contact piece, 5... Switch frame, 10... Operating piece, 13... Pressing protrusion.

Claims (1)

[Scope of utility model registration request] a switch frame having a refracting piece at the tip; a movable contact piece having a contact point at the tip end and attached to the switch frame; a fixed contact piece having a triangular shape, a fulcrum member attached to the movable contact piece and the switch frame so that the triangular tips contact the fixed contact piece from above and below with slight intervals; an actuating piece that is attached and whose tip engages with the bending piece at the tip of the switch frame;
When the slide lever touches the pressing protrusion provided at the tip of the actuating piece, the movable contact piece bends, and even if a force is exerted to move the actuating piece upwardly, the bending piece at the tip of the switch frame remains in place as the actuating piece. It hits the tip of
When the actuating piece is prevented from moving upward and the slide lever is further slid to press the actuating piece downward, the movable contact piece is deflected downward and the fulcrum member is moved behind the fixed contact piece. By pressing the end, the tip of the fixed contact piece bends upward about the fulcrum member provided on the switch frame, and the downward bend of the movable contact piece and the upward bend of the fixed contact piece are caused. A leaf switch characterized in that contact points provided at each tip are brought into sufficient contact with each other.