JPH02201878A - Electric appliance - Google Patents

Abstract

PURPOSE:To achieve smooth release button action without being affected by burrs by providing a recess for avoiding burrs in a portion where a release button strikingly contacts a main body. CONSTITUTION:As an electric wire 7 is inserted inside through a hole 13 in a switch body 1, it contacts a pressing piece 5 of a leaf spring 4, establishing continuity electrically between the electric wire 7 and a terminal 3. A locking piece 6 of the leaf spring 4 provides locking action by preventing the electric wire 7 from moving in a draw-out direction. To release the lock and draw out the electric wire 7, a proper tool such as a plus or minus screwdriver 22, 23 is used to press on a release button 2 located internally via a slit 12 of the switch body 1. When the button 2 is pressed in the direction of the screw, a protrusion 8 lifts the locking piece 6 to release its engagement with the electric wire 7, allowing the locking piece 6 to leave the electric wire 7. As a result, the electric wire 7 now can be drawn out in the direction of the arrow (B).

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrical appliance equipped with a self &R'5 type terminal (SL terminal), and particularly to a release structure for unlocking.

[Prior Art] A self-locking terminal is a terminal configured so that when a wire to be connected is inserted, the terminal is electrically connected to an internal terminal, and the wire is automatically locked so that it cannot be pulled out. It is. Such self-locking terminals generally consist of a device body made of a molded body, a locking piece that engages with the wire so as to prevent the wire inserted into the device body from moving in the pulling direction, and The device is equipped with a release button made of a molded body, which is mounted inside the device body and is used to disengage the locking piece from the electric wire by pressing the locking piece from the outside.

[Problems to be Solved by the Invention] In the above-mentioned self-locking terminal, since the device body and the release button are molded bodies, the joints of the molds,
In particular, burrs may remain on the periphery of the wire insertion hole and at the mold joint of the release button, and may not be removed. For electric appliances equipped with conventional self-button-and-lock terminals, when the release button is pressed from outside the appliance to unlock and pull out the wire, the release button does not operate smoothly due to the burrs, which interferes with wiring work. There were cases where this occurred. Also, when the release button is released, it may get caught on the burr and not return from the unlocked position, or it may get caught on the burr on the way back, and the locking force of the locking piece may not be obtained when the electric wire is inserted next. there were.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide a release structure for an electrical appliance that eliminates the influence of burrs, smoothes the operation of a release button, and provides a reliable locking action. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a contact portion of the release button to the device body (a locking step portion that engages with the periphery of the wire insertion hole provided in the middle portion of the release button). A burr relief recess having a predetermined width is formed near the release button, intersecting the direction of movement of the release button.

[Operation] The burrs generated on the instrument body side enter the recess of the release button, so they do not affect the operation of the release button.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded view of a self-locking terminal portion of a switch which is an electrical appliance according to the present invention, and FIG. 2 is a partially cutaway overall view of the assembled state. A release button 2 and a terminal plate 3 are placed inside a switch body 1 made of a plastic molded body.
is installed. A leaf spring 4 is provided within the terminal plate 3.

One end of the leaf spring 4 constitutes a pressing piece 5, and the other end constitutes a self-locking locking piece 6. The back surface of the center portion of the leaf spring 4 is in contact with the terminal plate 3. 7 is an electric wire to be connected. A lock release protrusion 8 is formed on the side surface of the release button 2. The release button 2 consists of a thick part 9 and a thin part 10, and a groove-shaped recess 11 is formed along the boundary between the two parts. The switch body 1 has a slit 12 into which the thin part 10 of the release button 2 is inserted and a hole 13 through which the electric wire 7 passes.
is formed. These structures are symmetrically provided on both sides of the switch body 1, as can be seen from FIG. 21 (Fig. 2) is a switch operation piece.

Reference numeral 22 indicates a parting line formed by molding the release button 2, and burrs are formed at this part.

Next, the operation of the self-locking terminal having the above structure will be explained with reference to FIGS. 3 and 4. When the electric wire 7 is inserted into the interior through the hole 13 of the switch body 1, the electric wire 7 comes into contact with the pressing piece 5 of the leaf spring 4, and the electric wire 7 and the terminal plate 3 are connected to each other, as shown in FIG. 4(a). electrically conductive. Further, the locking piece 6 of the leaf spring 4 engages with the electric wire 7 to prevent the electric wire 7 from moving in the pulling direction, thereby achieving a locking effect.

To release the lock and pull out the electric wire 7, as shown in FIG. Press the release button 2 inside. Note that the slit width may be widened only at the center of the slit 12 in order to allow insertion of a large-diameter tool such as the Phillips screwdriver 23. When the release button 2 is pressed in the direction of arrow A as shown in FIG. Leave. As a result, the electric wire 7 becomes
As shown in FIG. 4(e), it can be pulled out in the direction of arrow B.

The molded states of the switch body 1 and the release button 2 are shown in FIGS. 5 and 6, respectively.

The switch body 1 is injection molded between an upper mold 14 and a lower mold 15. 16 and 17 are the mating surfaces of the molds, where burrs occur. Therefore, the shoulder 12a of the slit 12 (Fig. 1)
burrs are formed.

The release button 2 is injection molded between an upper mold 18 and a lower mold 19. A burr is formed on the mating surface 20 of the upper die 18 and the lower die 19.

In the present invention, when molding the release button 2, the groove-like recess 1 is formed along the boundary between the thick part 9 and the thin part io.
1 is formed. Therefore, the thin part 1 of the release button 2
0 into the slit 12 of the switch body 1 and
When the release button 2 is attached to the switch body 1 by bringing the release button 2 into contact with the shoulder 12a of the slit 12, the burr on the shoulder 12a enters the recess 11 of the release button 2. The width of the recess 11 is determined in accordance with the amount of movement of the release button 2 in the operating direction. With this configuration, the burr on the switch body 1 side does not engage with the release button 2 during the operating stroke of the release button 2, and the operation of the release button is not hindered by engagement with the burr on the release button 2 side.

[Effects of the Invention] As explained above, in the present invention, since the release button of the self-locking terminal is provided with a recess for burr escape at the contact portion with the main body, the operation of the release button is free from the influence of burrs. A smooth release operation is achieved without any interference, and the release button does not stop in the middle of operation due to burrs, so a reliable locking action is achieved.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a self-locking terminal structure according to the present invention, Fig. 2 is a partially cutaway view of a switch with the self-locking terminal structure of Fig. 1, and Fig. 3 is a self-locking terminal structure. Fig. 4 is an explanatory diagram of the operation of the self-lock terminal, Fig. 5 is an explanatory diagram of the switch body molded state, and Fig. 6 is an explanatory diagram of the release button molded state. be. ! ...Switch body, 2...Release button, 3.
...Terminal board, 4... Leaf spring, 5... Pressing piece, 6...
- Locking piece, 7... Electric wire, 8... Protrusion, 11... Recess, 12... Slit.

Claims (1)

[Claims] A device body made of a molded body and having a wire insertion hole; a locking piece that engages with the wire inserted into the wire insertion hole of the device body so as to prevent the wire from moving in the withdrawal direction; and the device body a release button which is a molded body that is mounted inside the housing and has a locking step portion in the middle portion that engages with the periphery of the wire insertion hole, and is configured to disengage the locking piece from the wire by pressing from the outside; 1. An electrical appliance comprising: a burr relief recess having a predetermined width formed near the locking step of the release button and intersecting the direction of movement of the release button.