JPH0113666B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone switch structure,
In particular, the present invention relates to a telephone hook switch structure in which a plurality of hook frames each having a group of contact bullets such as a hook switch and a slide bar for operating the hook frames are arranged in succession.

The switch is a component that cannot be attached to a telephone, and is generally operated in conjunction with the attachment and detachment of the handset from the housing in order to switch between a talking state and a non-talking state.

Needless to say, such a hook switch needs to be inexpensive with a small number of parts, and it is desirable that the number of contact opening/closing parts can be easily increased, and that it has a locking mechanism for the hook lever, a dust-proof structure for the contacts, etc. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive and highly reliable hook switch structure that satisfies all of the above-mentioned needs.

Describing the structure of the present invention, the present invention provides a telephone in which a plurality of hook frames each having a group of contact strips such as a hook switch and a slide bar for operating the hook frames are arranged in succession.
All of the hook frames mentioned above have a structure in which they fit together and are connected in series, and the group of contact strips in the hook frame are sealed within the frame by the bottom surface of the frame and the circuit board. The rotation shafts on both sides of the front edge of the hook lever and the bearings on the tips of the support columns rising from both sides of the front of the first hook frame are elastically engaged by the elasticity of either side. These foot levers and the first frame are configured to be locked in a non-talking state by protruding locking parts provided on each side, and when the foot lever moves to press the slide bar of the first frame, This is a telephone switch structure in which a slide bar on a rear frame is pressed by a slide bar on a front frame.

The present invention will be explained below by way of examples with reference to the drawings.

All drawings relate to embodiments of the present invention;
FIG. 1 is a perspective view of the hook lever 3 of the hook switch 1 and the first hook frame 2 before they are assembled;
FIG. 2 shows a perspective view of the hook frame 2 after it has been assembled, and FIG. 3 shows a perspective view of the hook frame 2 seen from the back side.
In these drawings, 1 is a switch, 2 is a switch.
is a hook lever, 3 is a hook frame, 4 is a slide bar, 5 is a group of contact bullets, and 6 is a coil spring. First, below the hook frame 2, grooves 2a are formed according to the number of contact strips 5, which can be press-fitted and fixed by the claws 5b of the fixing portions 5a of the contact strips 5. The pieces are press-fitted. On the side of the displacement portion 5c of the contact strip 5 opposite to the fixed portion 5a, a slide bar 4 is provided with guide holes 2b provided in both walls of the hook frame 2 so that the slide bar 4 can slide in the thickness direction of the contact strip 5. is inserted into. The projection 4a at the center of the slide bar 4 is used to displace and operate the displacement portion 5c of the contact strip 5 by sliding. A hook lever 3 which receives the weight of the handset 11 shown in FIG. 6 and keeps the slide bar 4 in an inoperative state is rotatably attached to the hook frame 2. The part that receives the weight of the handset is the button part 3a, and the rotating part is the pivot shaft 3 on both sides of the front edge.
b, and is inserted into the bearing portion 2c at the tip of the support column rising from both sides of the front portion of the hook frame 2. This is inserted while opening outward by utilizing the elasticity of the bearing portion 2c. The coil spring 6 is attached between the hook lever 3 and the hook frame 2 so as to constantly rotate the hook lever 3 and operate the contact strip 5. Therefore, by lifting the handset, the hook lever 3, which has been rotating due to the weight of the handset, rotates by the rotational force generated by the coil spring 6, and operates the contact strip 5. Since the hook switch 1 is normally mounted on the circuit board 7, the contact strip group 5 is sealed by contact between the circuit board 7 and the bottom surface of the hook frame 2, resulting in a completely dust-proof structure.

Next, regarding the method of increasing the number of circuits, in the embodiments shown in Figs. It goes without saying that a groove 2a is formed in which the slide bar 4 of the hook frame 2 is fitted, but the hook frame 2 is You can increase the number by connecting like minded people. This is achieved by the connecting operation between the slide bars 4, and is because the slide bars 4 of the first hook frame 2 operate the slide bars 4 of the additional hook frames 2. A simplified diagram of the connection is shown in FIG.

Next, when the housing 9 shown in FIG. 6 is removed for maintenance or the like, a method of locking the hook lever 3 to maintain the non-communication state will be described with reference to FIGS. 9 to 11. This lock includes an elastic protruding locking part 3d that is integrally formed in a part of the hook lever 3 and has an engaging part 3c at the tip, and a position of the hook frame 2 that faces the locking part 3d. This is implemented by the locking portion 2f.

That is, the foot lever 3 can move in the direction of the arrow D in FIGS. 9a and 9b around the rotating shaft 3b, and its movable range is as shown in FIGS. It is set at points A to C. As shown in FIG. 9a, the elastic protruding locking portion 3d
The engaging portion 3c is in a positional relationship in which it does not engage the engaging portion 2f even if it moves between points A and C when the engaging portion 3d is not bent by an external force. Also, the 9th
In Figures a and b, the engaging portion 3c is configured to be located at a point B between points A and C when engaged with the locking portion 2f. To lock the hook lever 3, press the button portion 3a and rotate (press down) the hook lever 3 in the direction of arrow D to lock the engaging portion 3.
When c is lowered to the position of point C and pressed from the outside toward the side wall of the hook frame 2 (arrow E in FIG. 10a), the elastic protruding locking portion 3d curves and the engaging portion 3c locks the hook frame 2. If the lever 3 is moved to just below the part 2f and rotated slightly in the reverse direction in this state to restore the lever 3, when the engaging part 3c returns to point B, the engaging part 3c and the locking part 2f will engage with each other. The foot lever 3 is locked (Fig. 10a, b).

When the casing 9 is removed for maintenance or repair of the telephone, the button section 3a of the foot lever 3 cannot be pressed down with the handset, so the button section 3a is not pressed when the handset is raised, that is, when the telephone is busy. Conventionally, to avoid this, the foot lever 3 was fixed with adhesive tape or the like, or something was placed on it to keep the foot lever 3 in a lowered state (on-hook state). However, in this embodiment, as described above, the engaging portion 3c of the elastic protruding locking portion 3d and the locking portion 2f are
By engaging with the lever, the hook lever 3 can be easily locked in the on-hook state even during maintenance or repair, and the troublesome work of using tape or the like as in the conventional method is eliminated.

Further, as described above, the engaging portion 3c and the locking portion 2f
The engagement position (point B) with the engagement part 3c is above the lowest point (point C) of the engagement part 3c, leaving a slight margin for descent (between points B and C) with respect to point C. It's starting to lock down. Therefore, to release this locked state, press down the foot lever 3 so that the engaging portion 3c further descends from the locked state at point B to point C (Fig. 11a, b). The mating part 3c is disengaged from the locking part 2f of the hook frame 2, and the elastic protruding locking part 3d, which was pressed inward and bent as described above, returns to its original state due to elasticity, and the locking part 3c becomes a locking part. Return to the position where it does not get caught on 2f (Fig. 11a, b),
The foot lever 3 is restored to point A by the rotational force generated by the coil spring 6 (FIGS. 9a and 9b). Therefore, even if repairs are completed and the case is covered with the foot lever 3 locked, this locked state can be automatically released by placing the handset on it or pressing down the foot lever 3 from the outside. . As a result, the problem of conventional tape-based locks, such as having to assemble the phone by covering it with the casing with the tape still attached, and then disassembling the phone again to remove the tape, is eliminated.

The rotating portion of the hook lever 3 and the elastic protruding locking portion of the locking mechanism portion may be constructed in a completely opposite manner to that shown in FIG. 1, as shown in FIG.

FIG. 6 shows a side view of the switch 1 according to the present invention mounted on a telephone 8, in which 9 is a housing;
10 is a bottom plate, and 11 is a transmitter/receiver.

7 and 8 are views of the two-transfer switch from the back, the former showing the on-hook state and the latter showing the off-hook state.

As explained above, according to the present invention, there are very few component parts, many additional functions are included, and the switch has more functions than the conventional switch, and is economical and streamlined. A switch assembly is obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a state before a hook lever is assembled into a hook frame in an embodiment of the present invention;
Fig. 2 is a perspective view of Fig. 1 after assembly, Fig. 3 is a perspective view of the hook frame according to the embodiment of the present invention, seen from the back side, and Fig. 4 is a simplified side view of the hook frame connected to the embodiment of the present invention. 5 is a perspective view of another embodiment in which the deflecting portion of the elastic engaging portion is opposite to that in FIG. 1, FIG. 6 is a side view of the hook switch of the present invention incorporated into a telephone, and FIG. 8 is a back view showing the hook frame of the embodiment in the on-hook state, FIG. 8 is a back view of the hook frame of the embodiment in the off-hook state, and FIGS. 9 a and b show the hook lever 3 and the hook in the off-hook state of the same embodiment, respectively. Front view and side view showing the relationship with frame 2, first
Figures 0 a and b are partial front and side views showing the relationship between the foot lever 3 and the hook frame 2 when the foot lever 3 is in the locked state (on-hook state), and Figures 11 a and b are respectively showing the relationship between the foot lever 3 and the hook frame 2 when the foot lever 3 is in the locked state (on-hook state). 5 is a front view and a side view showing the relationship between the hook lever 3 and the hook frame in a pressed state (on-hook state). FIG. The main symbols used in the drawings are as follows. 1...Hook switch, 2...Hook frame, 3...Hook lever, 4...Slide bar,
5...Contact bullet group, 3b... Rotating shaft, 2c... Bearing portion, 3d... Elastic protruding locking portion, 2f... Locking portion.

Claims (1)

[Claims] In a telephone set in which a plurality of hook frames each having a group of contact strips such as a hook switch and a slide bar for operating these are arranged in succession, all the hook frames are fitted together. The contact strips in the hook frame are sealed in the frame by the bottom surface of the frame and the circuit board, and the contact strips in the hook frame are sealed in the frame by the bottom surface of the frame and the circuit board. The bearings at the ends of the support columns rising from both sides of the front of the hook frame are elastically engaged by the elasticity of either side, and these hook levers and the first frame are each It is configured to be locked in a non-calling state by a protruding locking part provided, and when the foot lever presses the slide bar of the first frame,
A telephone switch structure characterized in that a slide bar of a rear frame is pressed by a slide bar of a front frame.