JPH0350590Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a small switch, and particularly to a small switch for a printed circuit board developed to be mounted on the end face of a printed circuit board.

Conventional technology In recent years, especially with the rapid development of electronic devices, devices have become more compact.In general, if a switch, which is larger than a semiconductor component, is mounted on the top of a printed circuit board, it will affect other components, so it is necessary to take up a large amount of space. However, the problem has been how to reduce the protrusion of the printed circuit boards in order to reduce the distance between the boards when a plurality of printed circuit boards are arranged in parallel, which hinders the miniaturization of the device.

The inventor of the present invention focused on the above-mentioned problem and, as a result of intensive research, invented a completely new and extremely effective method for installing a control device and a control device related thereto. The new method for installing control equipment is as follows: ``Create a hole in the printed circuit board, place the control device in the hole,
A method of mounting the control device on the printed circuit board through an engagement relationship between the end face of the defect and the end face of the control device.” A detailed explanation of the method for installing this control device is described in the specification and drawings of Japanese Patent Application No. 155774/1987 filed by the same applicant as the present application. In addition, a control device for mounting a printed circuit board is a control device that has multiple terminals arranged on the bottom surface of the main body, and has vertical grooves on the left and right sides of the main body that engage the end surfaces of the holes formed in the printed circuit board. and a printed circuit board mounting control device configured by arranging an elastic piece in the longitudinal groove to press the end face of the defect, and a detailed explanation of this printed circuit board mounting control device is provided in the present application. This is described in the specification and drawings of Japanese Patent Application No. 59-207515 filed by the same applicant.

Although the intended purpose was achieved by the above two inventions, the problem arose that if there were more switches, there was a way to simply attach them to the end face of a printed circuit board. Special request 1987-
A technology based on the invention described in Specification No. 207515 and further expanding the peripheral areas of those technologies, that is, a technology that can be easily and conveniently attached to the end surface of a conventional printed circuit board as it is without creating a defect in the printed circuit board. A small switch has been developed that can do this. This small switch has a groove on the bottom of the switch body whose end face is inserted into the printed circuit board in the same direction as the operating direction of the handle, and a terminal on one or both sides of the inner surface of the groove. A plurality of fixed contact pieces are arranged, and a movable contact piece is provided above the groove to move with the handle and selectively contact the fixed contact pieces. A detailed description of this small switch is given in U.S. Pat.

Problems to be Solved by the Invention However, the small switch described in the specification of Utility Model Application No. 59-189556 has a printed circuit board installed in a groove provided in the bottom of the switch body in the same direction as the operating direction of the handle. Since the switch terminal is temporarily fixed (semi-fixed) to the printed circuit board by inserting the end face of the switch, this temporary fixing is unreliable due to product precision and variations, and it is difficult to solder the switch terminal to the wiring pattern of the printed circuit board. During the attaching process, the switch is displaced due to its own weight, heat, vibration, etc., which is placed above the edge of the board.
This creates a problem in that the switch terminal and the wiring pattern of the printed circuit board to which the terminal is to be connected are misaligned, making it impossible to perform ideal and highly reliable soldering.

The present invention has been made in view of the above-mentioned circumstances of the prior art, and therefore, the purpose of the present invention is to provide a novel small switch that can eliminate the above-mentioned drawbacks inherent in the prior art. .

Means for Solving the Problems In order to achieve the above object, the small switch for printed circuit boards according to the present invention is designed for use in switches that are mounted with the bottom plate surface of the switch from which the terminals protrude and the end surface of the printed circuit board facing each other. , a mounter bent in a U-shape is fixed to the switch body, and clip-shaped tongues hanging downward are arranged on the left and right sides of the mounter, respectively, and the printed circuit board is elastically held between the tongues, The terminals are fixed, and the plurality of terminals are configured to face a wiring pattern previously formed on a printed circuit board.

Embodiments Next, preferred embodiments of the present invention will be specifically described with reference to the drawings.

Figures 1 to 4 show a first embodiment of the present invention, in which Figure 1 is a sectional view of the main part, Figure 2 is a perspective view, Figure 3 is a plan view, and Figure 4 is a bottom view. It is.

In FIGS. 1 to 4, reference number 1 indicates a switch body, and a mounter 2 is attached to the upper part of the switch body 1, and a mounter 2 is formed with a clip-shaped tongue piece 2a having both left and right ends hanging downward. There is.
The mounter 2 is formed into a U-shape by an elastic body,
For example, the sleeve 5 protruding from the top of the switch body
It is press-fitted and fixed. An uneven portion (see FIG. 5) can be provided on the inner surface of the clip-shaped tongue piece 2a.

A bottom plate (switching plate) 3 is fixed to the lower part of the switch body 1, and terminals 4 are provided on one side or both sides (one side in this embodiment) of the side surface of the bottom plate 3.
A plurality of fixed contact pieces (not shown) are provided. A converter 7 is disposed above the bottom plate 3 and controls opening and closing operations in conjunction with a handle 6 having a swinging fulcrum within the sleeve 5. A hole 7a is provided in the center of the converter 7, and movable contact pieces (not shown) corresponding to the fixed contact pieces 4 are formed on both sides of the converter 7. If the fixed contact pieces are provided only on one side of the bottom plate 3, the movable contact pieces need only be formed on the corresponding one side of the converter 7 accordingly. A push rod 10 connected to the lower end of the handle 6 via a spring 9 is fitted into the hole 7a of the converter 7. When the handle 6 is operated, the push rod 10 and the converter 7 move against the mountain-shaped surface of the bottom plate 3. The switch is switched by sliding and the movable contact piece selectively coming into contact with a plurality of fixed contact pieces.

A cutout 11a cut in the end face of the printed circuit board 11 is inserted into the surface of the bottom plate 3 of the switch main body 1,
A terminal 4a integrated with a fixed contact piece is connected in contact with a pattern 12 formed on a substrate 11. When the terminal 4a is connected to the pattern 12 by soldering, the switch is firmly fixed to the end of the printed circuit board. In addition, at the time of this fixing, by forming a pattern on the part of the printed circuit board 11 corresponding to the tongue piece 2a of the mounter and soldering the tongue piece 2a to the pattern, the switch can be made even stronger on the printed circuit board. can be fixed to.

In the first embodiment shown in FIGS. 1 to 4, the switch is mounted in a recess 11a provided in the printed circuit board 11, but it is not necessary to provide this recess 11a. It can also be installed on a flat end surface.

FIG. 5 is a perspective view showing a second embodiment of the present invention. This embodiment is a modification of the mounter, that is, a mounter 22 made of an elastic material is fixed to the upper part of the switch body. The mounter 22 has clip-shaped (forked) tongue pieces 22a hanging downward from both ends. An uneven portion 22a1 is provided on the opposing inner surface of the tongue piece 22a, and a recessed portion 22a2 for relieving the thickness of the printed circuit board is formed at the base portion. This recessed part 22a
2, it is possible to cope with and absorb variations in the thickness of the printed circuit board held between the tongues.

FIG. 6 is a side view showing a third embodiment of the present invention;
FIG. 7 is a side view of FIG. 6 with the tongue removed. In the third embodiment, the mounter is
This is the same as the embodiment described above, but in this example, a groove 23 into which the end surface of the printed circuit board is inserted is formed in the bottom surface of the switch body in the same direction as the operating direction of the handle. It is clear that by forming this groove 23, temporary fixation of the switch to the printed circuit board becomes more reliable.

Effects of the invention The invention is constructed and operates as described above, and the invention produces the following effects.

(1) The tongues hanging down on both the left and right sides of the mounter are clip-shaped so that they face each other, so even if the end of the printed circuit board to be fixed has a hole, it can be fixed without a hole. (The step of creating a defect is omitted; therefore, no mold is required to provide the defect.) It can be attached to any printed circuit board.

(2) In addition to soldering with the switch terminal, by providing a pattern on the printed circuit board opposite the tongue piece and soldering that part as well,
The switch is more securely fixed, and it is possible to reliably prevent the switch from coming off the printed circuit board when the switch is opened or closed. In addition, it is possible to prevent unnecessary force from being applied to the switch terminals, thereby preventing the switch from malfunctioning.

(3) Since the switch can be elastically temporarily fixed to the printed circuit board using the clip-shaped tongue piece provided on the mounter, it is possible to securely and reliably solder the switch without causing any misalignment between the terminal and the pattern position of the printed circuit board. Attachment can be achieved.

(4) As mentioned above, temporary fixation to the printed circuit board can be firmly achieved, so even if a defect is provided at the edge of the printed circuit board and a switch is not fitted into the defect, the pattern of the printed circuit board During the process of soldering the switch terminal to the board, the weight, heat, vibration, etc. of the switch above the edge of the board will not cause the terminal and the pattern to naturally move away from each other, resulting in ideal and highly reliable soldering. It is possible.

(5) By providing an uneven portion on the inner surface of the clip-shaped tongue pieces provided on the left and right sides of the mounter, the uneven portion bites into the surface of the printed circuit board and can be firmly fixed. By providing this, a slight partial gap is created between the patterns, which allows the solder to flow better between the patterns, making it possible to perform stronger soldering.

(6) In addition, as described in the specification of the above-mentioned Japanese Patent Application No. 59-207515, etc., since the switch can be attached to the printed circuit board with one touch, it is possible to save labor for installation or to reduce the thickness of the printed circuit board. It also has the effect of being able to save space.

[Brief explanation of the drawing]

Figures 1 to 4 show a first embodiment of the present invention, in which Figure 1 is a sectional view, Figure 2 is a perspective view, Figure 3 is a plan view, Figure 4 is a bottom view, and Figure 4 is a bottom view. 5 is a perspective view showing the second embodiment of the present invention, FIG. 6 is a side view showing the third embodiment of the present invention, and FIG.
It is a side view which shows the tongue piece cut away in the figure. 1... Switch body, 2, 12... Mounter,
2a, 22a... tongue piece, 22a1... uneven part, 2
2a2...Concave cutout, 3...Bottom plate (switching plate), 4a
...Terminal, 5...Sleeve, 6...Handle, 7...
Converter, 7a... hole, 9... spring, 10... push rod, 11... printed circuit board, 11a... missing spot, 1
2...Wiring pattern, 23...Concave groove.

Claims (1)

[Scope of claim for utility model registration] (1) In a switch that is installed with the bottom plate surface of the switch with protruding terminals facing the end surface of the printed circuit board, a mounter bent in a U-shape is fixed to the switch body. At the same time, clip-shaped tongues hanging downward are arranged on the left and right sides of the mounter, and the printed circuit board is elastically clamped and fixed by the tongues, and the plurality of terminals are pre-formed on the printed circuit board. A small switch for printed circuit boards characterized by being configured so as to face the pattern. (2) The small switch for a printed circuit board according to claim (1), further characterized in that an uneven portion is provided on the inner surface of each of the tongue pieces.