JPH0332239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is mainly used for attaching lever-operated parts that are attached to the front chassis of electronic equipment such as television receivers and radio receivers and that are operated from the outside by an operating lever. It is about the method.

Prior Art The conventional technology will be explained with reference to FIG. As shown in the figure, in this type of lever-operated electronic component, a threaded portion 3 provided on the outer periphery of a bearing 2 that passes through the operating lever 1 is passed through a hole 5 in a front chassis 4.
Generally, the chassis 4 is fastened from the outside with a tightening nut 6. In this case, a rotation prevention (positioning) protrusion 7 is provided separately from the bearing screw portion 3, and a rotation prevention hole 8 of the chassis 4 is provided with a rotation prevention projection 7. It was normal to engage them.

Problems to be solved by the invention The above method has been used for many years, but
While holding the component body part 9 from the inside, press the operating lever 1.
It took a lot of man-hours to pass through the tightening nut 6 from the tip side and tighten it. In addition, in many cases, several parts of different shapes and sizes are arranged side by side, and other electronic parts are arranged around the part body 9, so when tightening the nut, the main body It is also easy to standardize the part 9 and hold it with a jig (temporary installation), and to automate the work of inserting the tightening nut 6 from the tip of the long operating lever 1 and tightening it to the bearing threaded part 3 at the base. Nakatsuta.

The present invention solves the above-mentioned problems and proposes a component attachment method that simplifies the attachment work of externally operated lever-operated components to the front chassis of an electronic device, reduces man-hours, and is easy to automate. It is something.

Means for Solving the Problems In order to solve the above problems, the present invention provides a substantially U-shaped notch in the chassis, a concave groove that engages with the chassis on the outer periphery of the bearing part of the lever-operated component, and The width of the concave groove is narrower than the width of the U-shaped notch of the chassis, and the width of the groove is narrower as it goes deeper, and the groove becomes smaller as it goes deeper. A portion having a width approximately equal to the width of the notch in the chassis is provided, and the notch in the chassis is tightly engaged with the concave groove.

Effects According to the present invention, with the above configuration, the lever-operated component can be easily inserted into the U-shaped notch of the chassis and can be installed without rattling.

Embodiment Prior to the description of the present invention, a prior example as a premise will be described with reference to FIGS. 4 and 5.

According to the figure, A is a rotary-operable variable resistor (hereinafter simply referred to as a component) having an operating lever 10, and the outer circumferential portion of a bearing portion 11 that penetrates and supports the lever 10 has concave grooves 12 and 12 on the left and right, respectively. ' are provided in parallel, and a small hole 13 for a screw is provided in the downwardly extending portion thereof. Reference numeral B designates a chassis to which the above component A is attached, and a substantially U-shaped notch 14 is cut into the end surface by a predetermined dimension so that the parallel concave grooves 12 and 12' engage with the chassis B. A screw hole 15 is bored at a position corresponding to the small hole 13 for a screw. The width W of the concave grooves 12, 12' of part A is set to be slightly larger than the thickness of the chassis B, and the interval between the left and right parallel concave grooves 12, 12' is set to be slightly larger than the thickness of the chassis B.
Since D ₁ is set slightly larger than the width D ₂ of the U-shaped notch 14 of chassis B, the second
As shown in the figure, temporarily attach the part A by fitting it between the parallel concave grooves 12 and 12' on the outer periphery of the bearing part 11 into the U-shaped notch 14 of the chassis B from above, and then tighten the screw 16 as shown in Fig. 3. Part A is firmly attached to chassis B by screwing it through the screw hole 13 in the bearing extension of A to the screw hole 15 in chassis B. There is a risk that due to variations (for example, the width dimension W becomes slightly smaller or the distance _D1 becomes slightly larger), the workability of inserting part A into chassis B becomes extremely poor. It was hot. The present invention, which will be explained below, is a further improvement of this prior example, and is shown in Figs.
Referring to FIG. 2, parts that are the same as those in the preceding example are given the same numbers.
The width dimension of 12a' is the U-shaped notch 14 of chassis B.
The entrance part to be inserted into a is made slightly larger than the thickness of chassis B, and it is sloped so that it becomes smaller as it goes deeper, and the thickness of the end part is equal to or slightly smaller than that of chassis B, and The interval between the left and right parallel parts of the convex grooves 12a, 12a' is also slightly narrower at the entrance than the left and right parallel parts of the U-shaped notch 14a of the chassis B, and is inclined to become larger as it goes deeper, and at the end part. are equal to or slightly larger than the spacing between the U-shaped notches 14a of the chassis B. Further, the bottom of the U-shaped notch 14a of the chassis B and the bottom where the concave grooves 12a, 12a' of the part A are connected is shaped to have tapers (or radiuses) at both corners, and the tapered parts 17 and 18 and 17' and 18' are respectively connected. are at equal angles, and when attaching part A to chassis B, it is easy to insert the mating part, and by press-fitting at the last part of insertion, the tapered parts 17, 18 and 17 are aligned while positioning the inlet part. ',1
8' to ensure positioning even at the bottom, and screw 16
Part A can be firmly fixed with part B.

Note that the component A is a variable resistor whose variable resistance value can be obtained by rotating the operating lever 10, as is well known, and other components may be used without any problem.

Effects of the Invention The present invention is configured as described above,
The parts are installed temporarily by simply inserting them from the top of the chassis, and then fixed with screws, which greatly reduces the number of installation steps compared to conventional methods. The mounting strength remains almost the same. Furthermore, even when attaching a large number of different parts to the chassis, as long as the shape of the bearing part is unified, screw fixing after temporary attachment can be standardized, and automatic screw fixing can be easily achieved. Furthermore, compared to the conventional method of cutting threads on the outer periphery of the bearing, there are advantages such as lower parts costs. In addition, during temporary installation, the width of the concave groove of the component should be made slightly larger than the thickness of the chassis at the entrance where it is inserted into the U-shaped notch of the chassis, and the width should be slanted so that it becomes smaller as it goes deeper. In this section, the thickness is equal to or slightly smaller than the thickness of the chassis, and the distance between the left and right parallel parts of the concave groove is slightly narrower at the entrance than the left and right parallel parts of the U-shaped cut of the chassis, and as it goes deeper, The dimensions of the ends are equal to or slightly larger than the spacing between the U-shaped notches on the chassis, making it easier to insert the mating parts when attaching the parts to the chassis. By press-fitting at the last part, temporary installation can be performed with good workability and firmly.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view illustrating an embodiment of the component mounting method according to the present invention, FIG. 2 is an exploded front view, FIG. 3 is a partially sectional side view, and FIG. The figure is an exploded perspective view illustrating a component attachment method that is a precedent example of the present invention, FIG. 5 is a partially sectional exploded view illustrating the state after attachment, and FIG. FIG. A... Lever operated parts, B... Chassis, 10...
Operation lever, 11...Bearing section, 12, 12', 12
a, 12a'...Concave groove part, 13...Small hole for screw, 14,
14a...U-shaped notch, 15...screw hole, 16...screw, 17, 17'...tapered portion.

Claims (1)

[Claims] 1. An operating lever of a lever-operated component is supported through a chassis having a substantially U-shaped notch cut into an end face with a predetermined dimension and a screw hole provided at a slight distance from the notch. The entrance part where the concave groove provided on the outer periphery of the bearing part is inserted into the U-shaped notch of the chassis is made slightly larger than the plate thickness of the chassis, and is sloped so that it becomes smaller as it goes deeper, and at the end part. In addition to providing a portion with a dimension approximately equal to the plate thickness of the chassis to ensure a tight fit, the spacing between the left and right parallel parts of the concave groove is also slightly narrower at the entrance than the width of the U-shaped notch in the chassis, allowing it to be pushed deeper into the groove. It is inclined so that it becomes larger as it enters, and at the end part, a part with a size approximately equal to the width of the cut in the chassis is provided, and after making a tight fit, it matches the screw hole on the extension of the outer circumference of the bearing. A component installation method that involves fixing a lever-operated component to the chassis by passing a screw through a small screw hole provided at the location where the lever is to be operated and tightening the screw. 2. The bottom shape of the U-shaped notch of the chassis and the concave groove of the lever-operated part is shaped to have a tapered part or rounded part at both corners, and the concave groove of the part is inserted into the chassis at the end where the tapered part or rounded part of both parts is formed. The method for attaching parts according to claim 1, wherein the parts match each other.