JPH0555389U - Operation unit mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] In the front operation part of the musical instrument, a switch board equipped with switches and a volume board equipped with a volume are integrated into a unit to mount an operation unit on the panel. Reduce the number of points to improve the assembly accuracy and assembly workability. [Configuration] The switch substrate 14 and the volume substrate 40 are
The switch operation knob 50 and the operation unit 42 made of synthetic resin integrally formed with the opening are attached to the panel operation unit 42.
Install by fitting without using screws.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an operation unit mounting structure in which a switch base plate equipped with switches and a volume board equipped with a volume are integrated into a unit and mounted on a panel in a front operation section of a musical instrument.

[0002]

[Prior Art]

 Conventionally, a structure in which a substrate on which switches and a volume are mounted is attached to a panel of a musical instrument is generally one as shown in FIGS. 5 to 7, 10 is a panel, 12 is a panel chassis, and 14 is a switch substrate. A slide switch 16, a tact switch 18, and an LED 19 are mounted on the switch board 14. The switch board 14 is fixed to the panel chassis 12 with screws 20, and the volume 22 is attached to the panel chassis 12 with nuts 24. Then, the panel chassis 12 to which the switch substrate 14 and the volume 22 are fixed is fixed to the panel 10 with screws 26, 26. 28 is an LED light, 30 is a film, 32 is a switch knob, 34 is a knob guide, and 36 is a volume knob.

[0003]

[Problems to be solved by the device]

 The above conventional structure has the following problems. (1) The number of parts is large, which leads to an increase in cost. (2) Since the error due to assembly is large, the dimensional accuracy is poor, which causes malfunction of the tact switch 18 and the like. (3) Since the LED light 28, the knob guide 34, and the like need to be adhered, and the screws 20, 26, 26, and the nut 24 need to be fastened, assembly workability is poor. The present invention has been made in view of the above points, and an object thereof is to provide an operation unit mounting structure in which a plurality of parts are integrated into one operation unit to improve assembly accuracy and assembly workability. To do.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the operation unit mounting structure of the present invention, as shown in FIGS. A combination provided with a switch operation knob 50 and openings 48 and 54 corresponding to the switches provided on the switch substrate 14 and a volume opening 44 corresponding to the volume 22 provided on the volume substrate 40. The switch substrate 14 is fixed to the resin operation unit 42 by the holding claws 58 and 60 on the peripheral portion of the operation unit 42, and the volume substrate 40 is screwed to the boss 46 having a screw hole provided in the operation unit 42. The operation unit 42, which is fixed by fixing the switch board 14 and the volume board 40 to each other, corresponds to the switches and the volume. In the panel 10 having the opening, the engaging claw 64 is fitted into the engaging hole 62 in the lower portion of the operation unit 42, and the engaging projection 68 in the upper end portion of the operating unit 42 is attached to the upper portion of the panel. It is characterized in that it is fitted and fixed in the engaging hole 66.

[0005]

[Action]

 The switch board 14 and the volume board 40 are fitted into the operation unit 42 and fixed by the engaging claws 58 and 60 of the operation unit 42. Further, the volume substrate 40 is fixed by the screw 74 using the boss 46 formed integrally with the operation unit 42. Next, the engaging claw 64 at the lower end of the operation unit 42 is inserted into the engaging hole 62 on the lower surface of the panel, and the engaging projection 68 provided on the upper surface of the operating unit is fitted into the engaging hole 66 on the upper surface of the panel, so that the operating unit 42 Are fixed to the panel 10. By doing so, the operation unit 42 can be firmly fixed to the panel 10 without being screwed.

[0006]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the materials, shapes, relative positions, etc. of the constituent devices described in this embodiment are not intended to limit the scope of the present invention to them only unless otherwise specified. It is just an example of explanation. 1 to 3 show an embodiment of an operating unit mounting structure of the present invention. A slide switch 16, tact switches 18, 18, and a LED 19 are mounted on the switch board 14, and a volume 22 is mounted on the volume board 40. Reference numeral 42 denotes an operation unit, which is a main part of the present invention. An opening 44 into which the volume 22 is inserted, a boss 46 having a screw hole for screwing the volume substrate 40, an opening 48 into which the LE D19 is inserted, and a tact. A substantially rectangular shape made of synthetic resin, which has a switch operating knob 50 for pressing the switch 18, a switch operating piece 52 connected to the switch operating knob, and an opening 54 into which the slide switch 16 is inserted. It is an integrally molded product. The operation unit 42 has a holding claw 58 for engaging the notch 56 in the lower portion of the switch board 14 at the lower part thereof, and a holding claw 60 for fixing the switch board 14 on both side surfaces. There is. The operation unit 42 has an engaging claw 64 on its lower surface for insertion into the engaging hole 62 on the lower surface of the panel 10, and an upper surface with an engaging projection 68 for inserting into the engaging hole 66 on the upper surface of the panel 10. Is equipped with.

The switch board 14 and the volume board 40 are fitted into the operation unit 42, which is an integrally molded product of synthetic resin, and are fixed by the holding claws 58 and 60 at five positions of the operation unit 42. The volume substrate 40 is fixed to the boss 46 with the screw 74 by inserting the volume shaft 72 into the rib portion 70 of the volume opening 44 of the operation unit 42. By attaching the operation unit 42 to the panel 10 in this manner, the following effects are produced in each part. (1) Tact switch part: Since the operation knob 50 is formed integrally with the operation unit and the position of the board is determined by the ribs around the opening, the accuracy of the position between the tact switch 18 and the operation knob 50 is increased, which may cause malfunction. Disappears. (2) LED part: The LED 19 on the switch board 14 enters into the rib 78 of the operation unit 42, so there is no light leakage to the outside. Further, the LED light 28 for guiding the light of the LED 19 to the outside is sandwiched by the operation unit 42 in the panel 10 as shown in FIG. 4, so that it is not necessary to fix it with the double-sided tape as in the conventional case. (3) Slide switch part: In this part, a knob guide made of synthetic resin was conventionally fixed to the panel with double-sided tape as a separate part, but in the structure of the present invention, the operation unit 42 is integrally molded. However, that is no longer necessary. (4) Volume part: The bearing part of the volume 22 is put and fixed in the tubular rib part 70 of the operation unit 42, and one point of the volume substrate 40 is screwed to the boss 46, so that the conventional nut tightening work can be performed. Disappear. It also doubles as a cover for the back side of the knob when viewed from the front side of the panel 10. That is, the panel chassis disappears. The operation unit 42 has no undercut in order to simplify the mold structure. Further, the operating unit 42 once fitted cannot be removed from the panel 10 unless the upper engaging projection 68 is removed using a tool such as a screwdriver.

[0008]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. (1) Since the operation knob and knob guide can be molded integrally with the operation unit, the number of parts can be significantly reduced. (2) Bonding work is eliminated, and the number of screw fastening points is reduced, which improves assembly workability and reduces costs. (3) The error due to assembly is small, the dimensional accuracy is improved, and there is no malfunction. (4) Since multiple functions are concentrated in one part (operation unit), there are significant production advantages such as cost, workability, and accuracy. (5) The mold structure of the operation unit is simple, and the mold cost is relatively low.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an operation unit mounting structure of the present invention. However, the illustration of the volume substrate is omitted.

FIG. 2 is a front view (left side view in FIG. 3) of a state after assembling the respective parts shown in FIG.

3 is a cross-sectional explanatory view taken along line 3-3 in FIG.

FIG. 4 is an enlarged cross-sectional view around the LED in FIG.

FIG. 5 is an exploded perspective view showing a conventional mounting structure for switches and a volume.

FIG. 6 is likewise an exploded side sectional view.

FIG. 7 is a sectional view of the same as the assembly side.

[Explanation of symbols]

 10 Panel 14 Switch Board 22 Volume 40 Volume Board 42 Operation Unit 44 Volume Opening 46 Boss 48 LED Opening 50 Operating Knob 54 Slide Switch Opening 58 Holding Claw 60 Holding Claw 62 Engaging Hole 64 Engaging Claw 66 For Engaging Hole 68 Protrusion for engagement

Claims (1)

[Scope of utility model registration request] 1. In a structure for mounting a substrate on which switches, a volume, etc. are mounted on a panel of a musical instrument, a switch operation knob (50) and an opening (corresponding to the switches provided on the switch substrate (14) are provided. 48), (5
4) and a volume opening (4) corresponding to the volume (22) provided on the volume substrate (40).
The switch board (14) is fixed to the operation unit (42) made of synthetic resin provided with 4) by the holding claws (58) and (60) at the peripheral edge of the operation unit (42), and the volume board (40) is fixed. Is fixed by screwing it to a boss (46) having a screw hole provided in the operation unit (42), and the operation unit (42) having the switch board (14) and the volume board (40) fixed thereto is provided with switches and the like. , An engaging claw (64) is fitted into the lower end of the operation unit (42) in the engaging hole (62) in the lower part of the operation unit (42), and the operation unit is inserted into the operation unit. An operation unit mounting structure, characterized in that an engagement projection (68) at an upper end portion of (42) is fitted and fixed in an engagement hole (66) at an upper portion of the panel.