KR100300362B1 - Push-button switch - Google Patents

Abstract

In the conventional pushbutton switch, since the movable contact 53 is folded at the two fixed contacts 52 at the same time, when the pushbutton 55 is pressed in the pressing direction, for example, the oblique direction, the movable contact 53 (53) A case where this does not come into contact with one of the fixed contacts 52 occurs, and the switching of the contacts is uncertain.

The pushbutton switch of the present invention comprises three first, second and third fixed contacts 2, 3 and 4 made of metal round wires, along the bottom wall 1a of the case 1. ), And the movable contact 5 is allowed to fold to the second fixed contact 3 with the movable contact 5 always in contact with the first and third fixed contacts 2,4. 2 Only the fixed contact point (3) can be folded to provide a pushbutton switch with a reliable contact and reliable switching of the contact point.

Description

Pushbutton Switches {PUSH-BUTTON SWITCH}

The present invention relates to a pushbutton switch used in an acoustic device such as an AV device or an electronic device such as a TV or a VTR.

Referring to the conventional first pushbutton switch, as shown in Fig. 26, the case 51 made of a synthetic resin molded article has a bottom wall 51a, a side wall 51b and a recess 51c. .

In addition, the two fixed contacts 52 made of a round wire are embedded in the bottom wall 51a side by side in a state where the contact portion 52a is exposed in the recess 51c.

Moreover, the movable contact 53 which consists of metal plates is arrange | positioned in the recessed part 51c so that it may be kept in a predetermined position at intervals on the two fixed contacts 52, and on this movable contact 53, the shape of a curved circular plate A spring member 54 is formed.

In addition, the pushbutton 55 is mounted to the case 51 by the plate part 56 fixed to the case 51, and when the pushbutton 55 is mounted, a part thereof is located in the recess 51c. At the same time, the remaining portion is configured to protrude outward from the recess 51c.

And when pushing the pushbutton 55 in the state of A of FIG. 26, as shown in B of FIG. 26, the spring member 54 is pressurized and moved by the pushbutton 55, and this spring member 54 The movable contact 53 is brought into contact with the top of the contact portions 52a of the two cylindrical fixed contacts 52 by contact, and the two fixed contacts 52 are connected to be in an ON state.

When the pressure is released, the spring member 54 and the movable contact 53 return to their original state by their elastic restoring force as shown in A of FIG. 55 is returned to its original state by the spring member 54.

In the conventional pushbutton switch as described above, since the movable contact 53 is folded at the two fixed contacts 52 at the same time, the pushbutton 55 is operated when the pushbutton 55 is pressed in a pressing direction, for example, an oblique direction. The case where the contact 53 does not contact with the one fixed contact 52 arises, and switching of a contact becomes uncertain.

In addition, since the movable contact 53 is in contact with the government of the contact portion 52a of the cylindrical fixed contact 52, there is a problem that the contact area is small and the contact is unstable and reliable contact cannot be made.

In addition, referring to the conventional second pushbutton switch, as shown in FIG. 27, a fixed contact 62 is embedded in the case 61 made of synthetic resin, and the terminal portion 62a is moved outward from the case 61. It protrudes and is installed.

In addition, the case 61 has a configuration in which a push button 63 for turning ON and OFF the contacts is mounted and a mounting plate 64 made of a metal plate is fixed.

This pushbutton switch mounts the mounting plate 64 on the mounting member 65 made of a printed board or the like, supports the pushbutton switch with the mounting plate 64, The terminal portions 62a of the corner portions 64a and the fixed contact 62 are fitted to the mounting member 65 so as to mount the pushbutton switch to the mounting member 65.

In addition, such a conventional pushbutton switch requires a mounting plate 64 for its mounting, and the number of parts increases, resulting in high cost, as well as poor productivity and large size.

In the conventional first pushbutton switch, since the movable contact 53 is folded to the two fixed contacts 52 at the same time, the pushbutton 55 is pressed in the pressing direction, for example, in an oblique direction. At the time of pressurization, the case where the movable contact 53 does not contact with the one fixed contact 52 arises, and switching of a contact becomes uncertain.

In addition, since the movable contact 53 contacts the government of the contact portion 52a of the cylindrical fixed contact 52, there is a problem that the contact area is small and the contact is unstable and reliable contact is not achieved.

In the conventional second pushbutton switch, the mounting plate 64 for mounting is required, and the number of parts increases, resulting in high cost, poor productivity, and a large size problem.

1 is a front view of a pushbutton switch of the present invention.

Figure 2 is a side view of the pushbutton switch of the present invention.

3 is a plan view of a pushbutton switch of the present invention.

4 is a rear view of the pushbutton switch of the present invention.

5 is a cross-sectional view taken along line 5-5 of FIG. 1.

6 is a front view showing a state in which a fixed contact is mounted on a case of a pushbutton switch of the present invention.

7 is a rear view showing a state in which a fixed contact is mounted on a case of a pushbutton switch of the present invention.

8 is a cross-sectional view taken along a line 8-8 of FIG. 6.

9 is a cross-sectional view taken along a line 9-9 of FIG. 7.

10 is an enlarged cross-sectional view of a main portion in a state in which a fixed contact is mounted on a case of a pushbutton switch of the present invention;

11 is a plan view of main parts of the first and third fixed contacts in the pushbutton switch of the present invention;

Fig. 12 is a side view of the main portion of the first and third fixed contacts related to the pushbutton switch of the present invention.

FIG. 13 is a bottom view of main parts of the first and third fixed contacts in the pushbutton switch of the present invention; FIG.

14 is a front view of a first and a third fixed contact of the pushbutton switch of the present invention.

Fig. 15 is a plan view of essential parts of a second fixed contact in the pushbutton switch of the present invention;

Fig. 16 is a side view of the main portion of a second stationary contact in accordance with a pushbutton switch of the present invention.

Fig. 17 is a bottom view of the main portion of a second stationary contact in accordance with a pushbutton switch of the present invention.

18 is a front view of a second fixed contact according to the pushbutton switch of the present invention.

19 is an explanatory diagram showing a manufacturing method of a pushbutton switch of the present invention;

20 is a plan view of a movable contact in the pushbutton switch of the present invention.

21 is a plan view of a pushbutton according to the pushbutton switch of the present invention.

22 is a front view of a pushbutton according to the pushbutton switch of the present invention.

Figure 23 is a plan view of a support plate according to the pushbutton switch of the present invention.

24 is an explanatory diagram showing the mounting of a pushbutton switch of the present invention;

25 is an explanatory diagram showing the mounting of a pushbutton switch of the present invention;

26 is a cross-sectional view showing a conventional first pushbutton switch.

27 is an explanatory diagram of a conventional second pushbutton switch.

Explanation of symbols on main parts of drawing

1: case 1a: bottom wall

1b: side wall 1c: recessed portion

1d: convex portion 1e: partition wall

2: first fixed contact 2a: contact portion

2b: flat surface 2c: terminal portion

2d: end 3: second fixed contact

3a: contact portion 3b: flat surface

3c: terminal portion 3d: end portion

4: third fixed contact 4a: contact portion

4b: flat surface 4c: terminal portion

4d: end 5: movable contact

6: push button 6a: control panel

6b: flange 6c: convex

7: support plate 7a: hole

7b: hole 8: mounting member

8a: hole

As the first solution for solving the above problems, three first, second and third fixed contact points made of a synthetic resin and having a bottom wall, a side wall and a recess, a metal ring wire, and the And a movable contact stored in the recess, wherein the first, second, and third fixed contacts are mounted side by side on the bottom wall with the contact portions of the fixed contacts exposed in the recess, respectively, The movable contact is always placed in contact with the first and third fixed contacts positioned on both sides of the contact, and the movable contact is in contact with the first and third fixed contacts when the movable contact is pressed. The center portion of the movable contact is configured to be in contact with the second stationary contact located in the middle.

Further, as a second solution, the first and third fixed contacts are provided with a flat surface on the upper surface of the contact portion exposed in the recess, and the movable contact is brought into contact with the flat surface.

Further, as a third solution means, the second fixed contact is provided with a flat surface on an upper surface of the contact portion exposed in the recess, and the movable contact can be folded on the flat surface.

Moreover, as a 4th solution means, the said contact part of the said 1st, 2nd, and 3rd fixed contact shall be the structure which protruded from the base material of a ring wire.

Further, as a fifth solution, the case is provided with a flat surface on the outer surface of the side wall and / or the outer bottom surface of the bottom wall, and the terminal portions of the first, second and third fixed contacts are provided on the side wall or the like. Protruding from the bottom wall, mounting the outer surface of the side wall or the outer bottom surface of the bottom wall to a mounting member such as a printed board, and simultaneously fitting the terminal portion of the first, second and third fixed terminals to the mounting member. It should be configured to be.

1 to 25, the pushbutton switch of the present invention with reference to Figures 1 to 25 are all related to the pushbutton switch of the present invention, Figure 1 is a front view, Figure 2 is a side view, Figure 3 is a plan view, Fig. 4 is a rear view, Fig. 5 is a sectional view taken along line 5-5 of Fig. 1, Fig. 6 is a front view showing a state where a fixed contact is mounted on a case, and Fig. 7 is a state where a fixed contact is mounted on a case. 8 is a sectional view taken along the line 8-8 of FIG. 6, FIG. 9 is a sectional view taken along the line 9-9 of FIG. 7, and FIG. 10 is a main part in the state where the fixed contact is attached to the case. 11 to 14 show a first and a third fixed contact, FIGS. 15 to 18 show a second fixed contact, FIG. 19 is an explanatory view showing a manufacturing method, and FIG. 20 is movable. Fig. 21 is a plan view of the push button, Fig. 22 is a partial cross-sectional side view of the push button, and Fig. 23 is Plan view of a base plate, 24 and 25 are explanatory views illustrating the mounting of the push button switch.

Next, the pushbutton switch of the present invention will be described based on Figs. 1 to 23, wherein the box-shaped case 1 made of a molded article of synthetic resin is formed with a recess 1c surrounded by a bottom wall 1a and a side wall 1b, It has the convex part 1d provided in the front surface, and the partition wall 1e provided in the back surface, The outer bottom surface of the bottom wall 1a and the outer surface of the side wall 1b are formed in the flat surface.

In addition, the three first, second and third fixed contacts 2, 3, and 4 made of a metal ring material have contact portions 2a, 3a, 4a and a contact portion 2a, 3a, 4a provided at the center thereof. It has flat surfaces 2b, 3b, 4b provided on the upper surface of the terminal, terminal portions 2c, 3c, 4c provided on one end, and end portions 2d, 3d, 4d provided on the other end.

The first and third fixed contacts 2, 4 serving as a common contact point, as shown in Figs. 11 to 14, have contact parts 2a and 4a protruded by the extrusion process from the base material of the ring member and the base material The flat surfaces 2c and 4c are squeezed into the top portions of the contact portions 2a and 4a to have a flat shape.

In addition, as shown in Figs. 15 to 18, the second fixed contact point 3 serving as a switching contact has a configuration in which the contact part 3a protrudes from the base material of the ring wire and protrudes from the base material. In addition, the flat surface 3c is squeezed to the top of the contact portion 3a to be flat.

As shown in FIG. 5, the second fixed contact point 3 has a larger squeeze process than the first and third fixed contact points 2 and 4, and the height of the contact part 3a is increased by the contact parts 2a and 4a. It is slightly lower than).

In addition, as shown in FIGS. 5 to 10, the three fixed contacts 2, 3, and 4 have exposed contact portions 2a, 3a, and 4a in the recesses 1c of the case 1, respectively. They are embedded in the bottom wall 1a side by side in the attached state.

And, when the fixed contacts 2, 3, 4 are mounted, each terminal portion 2c, 3c, 4c protrudes outward from the side wall b below the case 1, and also ends 2d, 3d, 4d) is bent and located between partition walls 1e provided in bottom wall 1a.

In addition, the manufacturing method of the case 1 and the three fixed contact points 2, 3, and 4 carries three round wires in parallel, as shown in FIG. Processing and squeeze processing to form the contact portions 2a, 3a, 4a in turn, then convey the three round wires, and then form the case 1 by the forming process of synthetic resin, Three round wires are embedded in the case (1).

In this manner, after the casing 1 is continuously formed, the ring wire is cut at a desired position to complete the manufacture.

Moreover, the movable contact 5 which consists of an elastic metal plate forms the shape of a curved circular plate as shown to FIG. 5 and FIG. 20, This movable contact 5 is accommodated in the recessed part 1c, It is mounted on the flat surfaces 2b, 4b of the contact portions 2a, 4a of the first and third fixed contacts 2, 4, and is in contact with the fixed contacts 2a, 4a.

And the curved center part of the movable contact 5 is in the state which opposes the contact part 3a of the 2nd fixed contact 3 at intervals.

Further, the pushbutton 6 made of a molded article of synthetic resin has an operation portion 6a, a flange portion 6b provided at one end of the operation portion 6a, and a convex portion 6c provided at the center portion, and this pushbutton 6 The silver flange part 6b and the convex part 6c are accommodated in the recessed part 1c.

Moreover, the support plate 7 which consists of metal plates etc. has the big hole 7a provided in the center part, and the some small hole 7b provided around the hole 7a, as shown in FIG. 7 inserts the operation part 6a in the hole 7a, and simultaneously inserts the convex part 1d of the case 1 into the hole 7b, and overlaps each other on the front surface of the case 1, and the convex part 1d The support plate 7 is attached to the case 1 by extending the front end of the casing.

At this time, the convex part 6c of the pushbutton 6 abuts on the center part of the movable contact 5, the pushbutton 6 is pressed by the movable contact 5, and the flange part 6b supports the support plate ( 7) is caught in the state.

Next, the operation of such a pushbutton switch will be described. In the non-operational state as shown in FIG. 5, the contact between the first and third fixed contacts 2 and 4 and the second fixed contact 3 is closed. In the OFF state, when the pushbutton 6 is pressed against the elasticity of the movable contact 5 in this state, the movable contact 5 becomes the flat surface 2b, of the first and third fixed contacts 2,4. 4b), the center portion is deformed to abut the flat surface 3b of the second fixed contact 3, and the first and third fixed contacts 2 and 4 and the second fixed contact 3 are in an ON state. Becomes

Further, when the pushbutton 6 is released, the movable contact 5 returns to its original state by its elasticity, and the pushbutton 6 is returned by the movable contact 5 to perform the In this state, the contact point is turned off, and thus the pushbutton switch is operated.

24 and 25 are explanatory views showing the mounting structure of the pushbutton switch according to the present invention. In FIG. 24, a hole 8a is provided in a mounting member 8 such as a printed board, and a case ( The flat surface provided on the outer surface of the side wall 1b of 1) is mounted on the upper surface of the mounting member 8, and the terminal portions 2c, 3c and 4c of the three fixed contacts 2, 3 and 4 are mounted. Terminal parts 2c, 3c, and 4c are soldered to the printed wirings (not shown) in the state where the hole is inserted into the hole 8a, and the pushbutton switch is attached to the mounting member 8.

In Fig. 25, the mounting member 8 is provided with a flat surface provided with a hole 8a in a mounting member 8, such as a printed board, and provided on the outer side of the side wall 1b of the case 1. At the same time as mounting on the upper surface of the terminal, the U-shaped terminal portions 2c, 3c and 4c attached to the three fixed contacts 2, 3 and 4 are inserted into the holes 8a, and the U-shaped terminal portions 2c and 3c are mounted. 4c), the terminal portions 2c and 3c 4c are soldered to the printed wirings (not shown) while the pushbutton switch is fixed to the mounting member 8, and the pushbutton switch is mounted to the mounting member 8. will be.

Such a configuration eliminates the need for the mounting plate 64 as in the prior art, and can provide a compact pushbutton switch with low cost and high productivity.

The flat surface provided on the outer bottom surface of the bottom wall 1a of the case 1 may be mounted on the upper surface of the mounting member 8 so that the pushbutton switch is mounted on the mounting member 8.

The pushbutton switch of the present invention mounts three first, second and third fixed contacts 2, 3 and 4 made of metal round wires on the bottom wall 1a of the case 1 side by side. Since the movable contact 5 is allowed to be folded to the second fixed contact 3 with the movable contact 5 always in contact with the first and third fixed contacts 2 and 4, the second fixed contact ( 3) Only the folds can be provided so that the contact is sure and the switch of the contact can be surely provided.

Further, flat surfaces 2b and 4b are provided on the upper surfaces of the contact portions 2a and 4a of the first and third fixed contacts 2 and 4, and the movable contacts 5 are provided on the flat surfaces 2b and 4b. Since the contact area is large, it is possible to provide a pushbutton switch having a large contact area and reliable contact.

Moreover, since the flat surface 3b was provided in the upper surface of the contact part 3a of the 2nd fixed contact 3, and the movable contact 5 was made to fold in this flat surface 3b, the contact area was It is possible to provide a pushbutton switch that can be switched to a contact with stable cursor contact.

Since the contact portions 2a, 3a, 4a of the three fixed contacts 2, 3, 4 are formed by protruding from the base metal of the ring wire, when the base material portion is embedded in the case 1, The contact portions 2a, 3a, 4a can be projected from the bottom wall 1a surface, and the pushbutton switches can be provided with better material operation and lower cost than bending to form the contact portions.

In addition, since the flat surface provided on the outer surface of the side wall 1b of the case 1 was mounted on the mounting member 8 so that the pushbutton switch was mounted on the mounting member 8, the conventional mounting plate 64 was used. ), A small number of parts, and a small number of low-cost and productive pushbutton switches can be provided.

Claims (6)

Three first, second and third fixed contacts made of a synthetic resin and having a bottom wall, side walls and recesses, a metal ring member, and movable contacts housed in the recesses. And the first, second, and third fixed contacts are mounted side by side on the bottom wall with the contact portions of the fixed contacts exposed in the recesses, and the first and second fixed contacts are located on both sides of the fixed contacts. The movable contact is arranged so that the third fixed contact is always in contact, and when the movable contact is pressurized, the center portion of the movable contact is located in the middle with the movable contact being in contact with the first and third fixed contacts. And a pushbutton switch for contacting the second fixed contact. 2. The pushbutton switch according to claim 1, wherein the first and third fixed contacts are provided with a flat surface on an upper surface of the contact portion exposed in the concave portion, and the movable contact is brought into contact with the flat surface. The said second fixed contact is provided with the flat surface in the upper surface of the said contact part exposed in the said recessed part, The said movable contact is foldable in this flat surface, It is characterized by the above-mentioned. Pushbutton switch. The pushbutton switch according to claim 2 or 3, wherein the contact portion of the first, second, and third fixed contacts is configured to protrude from the base metal of the ring wire. The said case is provided with the flat surface in the outer surface of the said side wall, and / or the outer bottom surface of the said bottom wall, and the said 1st, 2nd, and 3rd fixed contact of the said case was provided. A terminal portion protrudes from the side wall or the bottom wall, and the outer side surface of the side wall or the outer bottom surface of the bottom wall is mounted on a mounting member such as a printed board, and at the same time, the terminal portion of the first, second and third fixed terminals is mounted. Pushbutton switch characterized in that it is fitted to the mounting member. 5. The casing according to claim 4, wherein a flat surface is provided on the outer surface of the side wall and / or on the outer bottom of the bottom wall, and the terminal portions of the first, second and third fixed contacts are provided on the side wall or the bottom wall. Protrude from the outer side surface of the side wall or the outer bottom surface of the bottom wall to a mounting member such as a printed board, and at the same time to fit the terminal portion of the first, second and third fixed terminals to the mounting member. Pushbutton switch, characterized in that.