JP4341916B2 - Switch operating mechanism - Google Patents

Description

  The present invention relates to an electronic device, and more particularly to an operation mechanism of the switch.

  Conventionally, when a knob is arranged at a location far from the printed circuit board to which the switch is fixed (for example, when a high-part is attached to the printed circuit board), the switch operating mechanism as shown in FIG. Was used. 5, tact switches 2 and 2 are arranged side by side.

  A seesaw knob 5 is rotatably attached to the front case 3 via a shaft 5a integrated therewith. The edge of the seesaw knob 5 is covered with the panel escutcheon 4, and the seesaw knob 5 protrudes from the hole of the panel escutcheon 4. The operating rods 10 and 10 disposed between the tact switches 2 and 2 and the seesaw knob 5 are fitted in holes in the operating rod support portion 3a of the front case 3 so as to be movable up and down.

  In the above configuration, when the right side of the seesaw knob 5 is pushed, the seesaw knob 5 rotates so that the right side is lowered, and the right tact switch 2 is operated via the right operating rod 10. When the left side of the seesaw knob 5 is pushed, the seesaw knob 5 rotates so that the left side is lowered, and the left tact switch 2 is actuated via the left actuating rod 10.

  The above-described conventional switch operating mechanism requires an operating rod for each switch, and there are problems that the number of parts and assembly man-hours increase when there are many switches to be operated. Further, in consideration of variations in component dimensions, the clearance (b in FIG. 5) between the operating rod 10 and the tact switch 2 cannot be eliminated, and abnormal noise may occur due to the clearance.

  Further, a clearance (a in FIG. 5) is also generated between the actuating rod 10 and the seesaw knob 5, and a means for eliminating rattling of the seesaw knob 5 is required, resulting in a complicated structure.

  Furthermore, if the fitting length (c in FIG. 5) between the actuating rod 10 and the actuating rod support portion 3a is short, the movement of the actuating rod 10 becomes unstable, and the feeling when operating the seesaw knob 5 is deteriorated. A problem occurs.

  In the conventional switch operating mechanism shown in FIG. 6, rubber switches 11 and 11 are used instead of the tact switches 2 and 2 of the switch operating mechanism described in FIG. Other configurations are the same as those described in FIG. The rubber switches 11 and 11 are electrically connected to each other when the conductive portions 11a and 11a attached to the bottom of the bowl-shaped rubber are pressed against the contacts of the printed circuit board.

  In this switch operating mechanism, the operation rods 10 and 10 can be pressed against the seesaw knob 5 by the elasticity of rubber to eliminate the clearance. However, the problem that the number of parts and assembly man-hours increase is not solved. Also, with the conventional rubber switch structure, it is extremely difficult to reduce the stroke to about 0.2 to 0.5 mm, and the rubber switch structure cannot be used when a short stroke is required.

The seesaw type switch proposed in Japanese Utility Model Laid-Open No. 7-18332 uses the same number of operation rods (referred to as pressing bodies) as the number of rubber switches as in the switch operation mechanism shown in FIG. There was a problem that man-hours increased.
Japanese Utility Model Publication No. 7-18332, abstract, FIG.

  The present invention has been made in view of the above points, and an object thereof is to provide a switch operating mechanism in which the number of parts and the number of assembly steps are reduced. Another object of the present invention is to provide a switch operating mechanism that can eliminate rattling of a knob with a simple configuration.

The switch operating mechanism of the present invention forms an integrated switch operating member by connecting a plurality of operating rods respectively arranged corresponding to the operating portions of a plurality of switches arranged in parallel by loop-shaped ribs, A knob that presses the plurality of operating rods is supported by a front case, the ribs are supported by claws provided on the front case, and the plurality of operating bars are pressed against the knobs by the elasticity of the ribs by the claws. It is a thing.

Further, in the operating mechanism of the prior kissing switches, in which the plurality of switches are attached to the printed circuit board.

  Further, in the operation mechanism of each switch, the knob is a seesaw knob.

  According to the switch operating mechanism of the present invention, since the operating rods are connected and integrated by the ribs, the number of parts and the number of assembly steps are reduced.

  Further, since the operating rod is pressed against the knob by the elasticity of the rib, the rattling of the knob and the operating rod can be easily removed.

  Furthermore, even if the operating rod is short, it is supported in a stable state by the ribs, so that poor touch and stacking (locked state) are prevented.

  The best mode for carrying out the present invention will be described below with reference to examples.

  1A is a cross-sectional view showing an operating mechanism of a switch that is Embodiment 1 of the present invention, FIG. 1B is a perspective view showing members of the operating mechanism of the switch, and FIG. 2 is in FIG. It is an A direction arrow directional view.

  In FIG. 1A, tact switches 2 and 2 are arranged in parallel on a printed circuit board 1. A seesaw knob 5 is rotatably attached to the front case 3 via a shaft 5a integrated therewith. The edge of the seesaw knob 5 is covered with the panel escutcheon 4, and the seesaw knob 5 protrudes from the hole of the panel escutcheon 4.

  Actuating rods 6a and 6a of the switch actuating member 6 are arranged between the actuating portions of the tact switches 2 and 2 and the seesaw knob 5, and are fitted in the holes of the actuating rod support portion 3a of the front case 3 so as to be movable up and down. Match. The shape of the switch actuating member 6 is shown in FIG. That is, the switch actuating member 6 has a shape in which the actuating rods 6a and 6a are connected by a square-shaped rib 6b and integrated.

  The rib 6b of the switch operating member 6 is locked to the claws 3b and 3b of the front case 3 as shown in FIG. The claws 3b and 3b press the rib 6b upward in FIGS. 1 (a) and 1 (b). The operating rods 6a, 6a are pressed against the lower surface of the seesaw knob 5 by the elasticity of the ribs 6b so that the play of the seesaw knob 5 is removed.

  In the above configuration, when the right side of the seesaw knob 5 is pushed, the seesaw knob 5 is rotated so that the right side is lowered, the right operating rod 6a is moved down against the elasticity of the rib 6b, and the right tact switch 2 is operated. Is done. When the left side of the seesaw knob 5 is pushed, the seesaw knob 5 is rotated so that the left side is lowered, and the left operating rod 6a is moved downward against the elasticity of the rib 6b, and the left tact switch 2 is operated. .

  In this example, the operating rods 6a and 6a are pressed against the seesaw knob 5 by the elasticity of the ribs 6b, and no noise is generated because there is no backlash. And since the rib 6b is a square loop shape, a big elasticity is obtained. Further, since the operating rods 6a and 6a are connected and integrated by the rib 6b, the number of parts and the number of assembling steps are reduced.

  FIG. 3 is a perspective view showing a switch operating member used in the switch operating mechanism according to Embodiment 2 of the present invention. As shown in FIG. 4, the switch actuating member 7 is formed by integrally connecting four actuating rods 7a, 7a ... by ribs 7 (b) having branches.

  The operating rods 7a, 7a,... Are arranged between the switch and the knob as in the first embodiment, and are pressed against the knob by the elasticity of the rib 7 (b). In this example, more switches can be operated by one switch operating member.

  4 is a perspective view showing a switch operating member used in a switch operating mechanism according to Embodiment 3 of the present invention. As shown in FIG. 5, the switch actuating member 8 is formed by integrally connecting four actuating rods 8a, 8a... By a rib 8 (b) having a branch. The ribs 8 (b) are formed with bent portions 8 (c), 8 (c).

  The operating rods 8a, 8a,... Are arranged between the switch and the knob as in the first embodiment, and are pressed against the knob by the elasticity of the rib 8 (b). In this example, more switches can be operated by one switch operating member, but the flexibility of the rib 8 (b) is further enhanced by the bent portions 8 (c), 8 (c). The operating rods 8a, 8a...

Although the embodiment is configured as described above, it is needless to say that the present invention can be applied to an operating mechanism of a rubber switch instead of a tact switch.

1A is a cross-sectional view showing an operating mechanism of a switch according to Embodiment 1 of the present invention, and FIG. 1B is a perspective view showing members of the operating mechanism of the switch. It is an A direction arrow directional view in Fig.1 (a). It is a perspective view which shows the member of the operating mechanism of the switch which is Example 2 of this invention. It is a perspective view which shows the member of the operating mechanism of the switch which is Example 3 of this invention . It is sectional drawing which shows the example of the operating mechanism of the conventional switch. It is sectional drawing which shows the other example of the operating mechanism of the conventional switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Tact switch 3 Front case, 3a Actuation rod support part, 3b Claw 4 Panel escalation 5 Seesaw knob, 5a Shaft 6 Switch actuating member, 6a Actuating rod, 6b Rib 7 Switch actuating member, 7a Actuating rod, 7b Rib 8 Switch actuating member, 8a Actuating rod, 8b Rib, 8c Bending part 10 Actuating bar 11 Rubber switch, 11a Conducting part

Claims (3)

A knob that presses the plurality of actuating rods by forming a switch actuating member that is integrated by connecting a plurality of actuating rods arranged corresponding to the actuating portions of the plurality of switches arranged in parallel by loop-shaped ribs. The switch is characterized in that the rib is supported by a claw provided on the front case and the plurality of actuating bars are pressed against the knob by the elasticity of the rib. mechanism. The switch operating mechanism according to claim 1, wherein the plurality of switches are attached to a printed circuit board . The switch operating mechanism according to claim 1 or 2, wherein the knob is a seesaw knob .

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