JPH0590771A - Fixing structure for switch - Google Patents

Abstract

(57) [Abstract] [Purpose] The objective is to obtain a switch mounting structure that has moderate machining and assembly tolerances, does not damage switches and other parts, and has no restrictions on the switch mounting position. [Structure] The push-button switch has a structure in which the switch is held at one end of a cantilevered leaf spring that bends in the direction of operation, and the other end of the leaf spring is fixed to a housing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a switch used for detecting the open / closed state of a lid of an electronic device.

[0002]

2. Description of the Related Art In electronic devices and the like, push button switches are used for detecting a physical state. FIG. 2 is a mounting view showing a conventional example in such a case. 1 in the figure
Is a push button switch, 2 is a push button portion thereof, 3 is a mounting screw for fixing the switch to the housing, and 4 is a housing.
This operation is performed by pressing the push button portion 2 with the lid 5 when the lid indicated by the one-dot chain line 5 is closed. With this structure, there is no problem if the positional relationship between the lid and the housing is correct,
For example, there is a possibility that a gap may be formed even when the lid and the housing are closed, or conversely, the switch may be broken by pushing the push button portion beyond the operating limit of the switch. Therefore, machining and assembly with a small tolerance are required, which leads to waste of cost and time.

A switch mounting structure has been proposed which is practical even if the tolerance is loose. Fig. 3 shows the actual Kaihei 3-1655
It is a figure of the attachment structure of the seating switch described in 0. In the figure, 1 is a switch, 6 is a frame, and 7 is a spring / spring, which is a double-supported structure. Although this structure has a sufficient operation margin at the mounting portion, it has two problems. One is a double-sided structure, so there are restrictions on the position of the switch.
That is, it cannot be used unless the detection point is near the central portion. Secondly, there must be little variation in the characteristics of the springs and springs 7. If you align with a strong spring, the switch attached to the weak spring will not work. Therefore, an expensive spring with uniform characteristics is required.

As a structure for eliminating the restriction on the mounting position of the switch, there is a structure described in Japanese Utility Model Laid-Open No. 57-173385. FIG. 4 is a view showing the mounting structure. In the figure, 1 is a switch, 2 is a push button part, 4 is a housing, and 7 is a coil spring part. This structure does not restrict the position of the switch, but the coil spring requires some thickness, so
There was a problem that the height became high.

FIG. 5 is a sectional view and a conceptual view of the click spring described in Japanese Utility Model Laid-Open No. 61-158035. In the figure, 8 is a leaf spring, 9 is a lower electrode, 10 is an upper electrode, 11
Is a display sheet. This structure cannot take a large stroke of the switch. When trying to increase the stroke, the leaf spring must be lengthened and increased.
That is, a position constraint will occur.

[0006]

Since the conventional switch mounting structure is constructed as described above, it is necessary to perform processing and assembly with a small tolerance, and it is impossible to install the switch at the end of the housing. There have been problems such as a certain height in the operating direction of the switch and the inability to take a large stroke. The present invention has been made to solve the above problems, and an object of the present invention is to provide a switch mounting structure that has less strict tolerance limits, does not damage switches and the like, and has few switch position restrictions.

[0007]

A switch mounting structure according to the present invention holds a switch at one end of a cantilevered leaf spring that bends in the direction of operation of a push button switch and fixes the other end of the leaf spring to a housing. With the structure.

[0008]

In the switch mounting structure according to the present invention, the push button portion is pushed to turn on the switch, but the variation of the stroke is absorbed by the amount of the leaf spring.

[0009]

EXAMPLES Example 1. FIG. 1 is a switch mounting structure diagram showing an embodiment of the present invention. In the figure, 1 is a switch,
Reference numeral 2 is a push button portion of the switch, 4 is a housing to which the switch is attached, and 5 is a lid whose opening / closing is to be detected. Reference numeral 12 is a cantilevered leaf spring newly added in the present invention, in which the switch 1 is held at one end and the other end is fixed to the housing 4 by a mounting screw 3 and enters.

With this structure, many problems mentioned in the conventional example are solved. First, the operation will be clear. When the lid is closed, the push button is pushed and the switch is turned on. At least for the stroke width from the detection position where the switch is turned on to the detection position where there is no gap between the housing and the lid,
It is clear that the leaf spring absorbs variations in the assembly of the housing and lid. The machining and assembly tolerances may be loose. With this mounting structure, there is no restriction on the mounting position because it is a cantilever spring. As shown in FIG. 1, the switch can be mounted at the corner or the back of the housing. Also in the height direction,
In other words, it is possible to realize a short housing by suppressing only the switch height in the thickness direction.

[0011]

As described above, according to the present invention, since the push button switch is held at one end of the cantilever leaf spring and the other end is fixed to the housing, there is no restriction on the installation position of the switch. Even if there are variations in processing and assembly, there is an effect that it operates safely and surely.

[Brief description of drawings]

FIG. 1 is a switch mounting structure diagram of an embodiment of the present invention.

FIG. 2 is a mounting structure diagram of a conventional push button switch.

FIG. 3 is a mounting structure diagram of a conventional seating switch.

FIG. 4 is a mounting structure diagram of a conventional coil spring type push button switch.

FIG. 5 is a sectional view and a conceptual view of a conventional click spring.

[Explanation of symbols]

 1 switch 2 push button part 3 mounting screw 4 housing 5 lid 12 cantilever leaf spring

Claims (1)

[Claims] 1. A push-button switch operating direction and a spring bending direction are made to coincide with each other to fix the other end of a cantilever leaf spring holding the switch at one end so that the push-button switch has a spring action in the operating direction. Built-in switch mounting structure.