KR100595043B1 - Push button switch - Google Patents

Abstract

The present invention is to provide a pushbutton switch that can be set to a low height of the operating portion of the stem.

A housing 1 in which a contact portion 2 including a dome-shaped reversal spring 6 is accommodated, and a pressurizing portion 7a disposed in the housing 1 to pressurize the dome-shaped reversal spring 6. ) And a stem (7) having an operating portion (7c) protruding out of the housing (1) to which an external force is applied, and an opening (8a) fixed to the housing (1) to protrude the operating portion (7c) of the stem (7). Has a frame 8 which prevents the stem 7 from falling out, and an opening 8a of the frame 8 is formed with a caulking portion 1b for fixing the frame 8 to the housing 1. The inclined surface 1a which is arrange | positioned without protruding from the surface part to become is provided in the four corners of the housing 1.

Description

Pushbutton Switches {PUSH BUTTON SWITCH}

1 is a perspective view showing a first embodiment of a pushbutton switch of the present invention;

2 is a plan view of a first embodiment of the present invention;

3 is a front view of a first embodiment of the present invention;

4 is a cross-sectional view taken along line A1-A1 of FIG. 2;

5 is a cross-sectional view B1-B1 of FIG.

6 is a view showing a frame provided in the first embodiment of the present invention, (a) is a plan view, (b) is a side view, (c) is a front view,

7 is a plan view showing a state during the production of the first embodiment of the present invention;

8 is a front view showing a state during the production of the first embodiment of the present invention;

9 is a cross-sectional view taken along line A2-A2 of FIG. 7;

10 is a cross-sectional view taken along line B2-B2 of FIG.

11 is a plan view showing a second embodiment of the present invention;

12 is a front view showing a second embodiment of the present invention;

FIG. 13 is a cross-sectional view taken along line A3-A3 of FIG. 11;

14 is a cross-sectional view B3-B3 of FIG.

15 is a plan view showing a third embodiment of the present invention;

16 is a front view showing a third embodiment of the present invention;

17 is a cross-sectional view taken along line A4-A4 of FIG. 15;

18 is a cross-sectional view taken along line B4-B4 of FIG. 15;

Fig. 19 is a perspective view showing a fourth embodiment of the present invention.

It is a figure which shows the frame provided in 4th Embodiment of this invention, (a) is a top view, (b) is a side view, (c) is a front view.

※ Explanation of codes for main parts of drawing

1: Housing 1a: Inclined surface (predetermined placement area)

1b: caulking part (fixed part) 1c: convex part

1d: Caulking part (fixed part) 1e: Concave part (predetermined placement area)

1f: Caulking part (fixed part) 1g: Corner part (predetermined placement area)

2: contact part 3: outer circumferential fixed contact

4: center fixed contact 5: movable contact

6: dome shape reverse spring 6a: outer circumference

6b: projection 7: stem

7a: pressing part 7b: engaging part

7c: control panel 8: frame

8a: opening 8b: taper

8c: hole 8d: stepped portion

8e: Wedge (fixed part)

The present invention relates to a pushbutton switch having a stem having an operation portion protruding from a housing in which a contact portion is received, and a frame preventing the stem from being pulled out.

As a prior art of this kind, a box-shaped case, i.e., has a contact portion including an outer circumferential fixed contact, a central fixed contact, and a movable contact in the housing, and has a pressing portion for pressing the movable contact, and an operation portion projecting out of the housing. There is an operating body, ie a pushbutton switch with a stem. The movable contact is formed in a dome shape and is always kept in contact with the outer circumferential fixed contact.

The pushbutton switch also has a central hole, ie, an opening, which protrudes the operating portion of the stem, and is provided with a cover, ie, a frame, which is fixed to the housing and prevents the stem from coming off. This frame is fixed to the housing by a fixing part, that is, a caulking part.

By pressing the stem, the movable contact comes into contact with the center stationary contact. As a result, the center stationary contact and the outer circumferential stationary contact are conducted via the movable contact, thereby switching on. When the pressure is released to the stem, the movable contact is separated from the center fixed contact. As a result, the center fixed contact is cut off from the outer circumferential fixed contact to be switched off (see Patent Document 1, for example).

The caulking portion is formed by, for example, punching the convex portion with a punch and deforming the convex portion formed in the housing into the hole formed in the frame. The caulking therefore protrudes from the top of the frame.

In addition, pressing force is applied to the operating part of the stem by a manually operated key top. Usually, the surface side of the key top which contacts a stem is set large compared with the surface part of the stem which touches a key top.

[Patent Document 1]

Japanese Patent Application Laid-Open No. 11-67002

(Paragraph 0014, FIG. 1)

In order to avoid interference between the lower surface of the key top and the caulking portion on the frame, the above-described prior art sets the height dimension of the operating portion of the stem protruding from the frame in order to predict the height dimension of the caulking portion. There is a tendency for the height dimension of the operation part of this stem to become high. Accordingly, the above-described prior art has a problem that the overall height dimension tends to be high and miniaturization becomes difficult.

The present invention has been made from the above-described prior art, and an object thereof is to provide a pushbutton switch which can set the height dimension of the operating portion of the stem to be low.

In order to achieve the above object, the present invention provides a housing in which a contact portion including a movable contact is accommodated therein, a pressing portion disposed in the housing to press the operation portion of the contact portion, and an external force protruding out of the housing. And a stem fixed to the housing, the stem being fixed to the housing and having an opening protruding the operating part of the stem, to prevent the stem from being pulled out, and to fix the frame to the housing. The housing is provided with a predetermined arrangement area for arranging the housing without protruding from the surface portion where the opening of the frame is formed.

According to the present invention configured as described above, since the fixing portion for fixing the frame to the housing is located in a predetermined arrangement area of the housing, the fixing portion can be positioned within the outer shape of the housing. Thereby, the dimension of the whole transverse direction can be maintained at the minimum dimension prescribed | regulated by the external shape of a housing. Moreover, since the fixed part arranged in the predetermined | prescribed arrangement | positioning area does not protrude from the surface part in which the opening of a frame is formed, the longitudinal dimension does not cause the interference between the key top which presses the operation part of a stem, and a fixed part. . Thereby, the height dimension of the operation part of a stem can be set to the dimension low as corresponded to the height dimension of a fixed part.

The present invention is characterized in that, in the above invention, the predetermined arranging area is formed of an inclined surface formed from the side surface of the housing to an upper surface thereof.

According to the present invention constituted as described above, by appropriately setting the shape dimensions of the inclined surface of the housing, the fixing portion can be reliably arranged so as not to protrude from the side surface of the housing and the surface portion where the opening of the frame is formed.

Moreover, in this invention, the said frame has the taper part arrange | positioned at the said inclined surface, It is characterized by the above-mentioned.

According to the present invention configured as described above, the frame can be brought into close contact with the housing by arranging the tapered portion of the frame on the inclined surface of the housing. As a result, the frame can be stably fixed to the housing.

Moreover, this invention is characterized in that the said predetermined arrangement area | region consists of the recessed part formed in the said housing in the said invention.

According to the present invention configured as described above, by appropriately setting the shape dimensions of the concave portion of the housing, the fixing portion can be reliably disposed so as not to protrude from the side surface of the housing and the surface portion where the opening of the frame is formed.

Moreover, in this invention, the said frame has a step part arrange | positioned at the said recessed part of the said housing, It is characterized by the above-mentioned.

According to the present invention configured as described above, the frame can be brought into close contact with the housing by placing the stepped portion of the frame into the recess of the housing. As a result, the frame can be stably fixed to the housing.

The present invention is characterized in that, in the above-mentioned invention, the shape of the housing is formed in a quadrangle and the fixing portions are disposed at each of the four corners of the quadrangle.

According to the present invention configured as described above, the frame is fixed at four corners of the housing, so that the frame can be fixed firmly.

Moreover, in this invention, the said fixed part consists of the caulking part which deform | transformed the convex part formed in the said housing, It is characterized by the above-mentioned.

According to the present invention configured as described above, the frame can be firmly fixed to the housing by the caulking portion, and the caulking portion is integral with the housing, so that the number of parts is not increased.

In the present invention, the frame has a hole in which the convex portion is inserted.

According to the present invention configured as described above, a caulking portion can be easily formed by punching the convex portion with a punch while the frame is disposed with respect to the housing so that the convex portion of the housing is inserted into the hole of the frame.

Moreover, in the said invention, the said fixed part consists of the wedge part formed in the said frame and injecting into the said housing, It is characterized by the above-mentioned.

According to the present invention configured as described above, the frame can be firmly fixed to the housing by the wedge, and the number of parts is not increased because the wedge is integral with the frame.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the pushbutton switch of this invention is described based on drawing.

[First embodiment]

1 to 6 are views showing a first embodiment of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a plan view, Fig. 3 is a front view, Fig. 4 is a cross-sectional view taken along line A1-A1 of Fig. 2, and Fig. 5 is Fig. 2. Bl-B1 is a cross-sectional view. 6 is a view showing a frame provided in the first embodiment of the present invention, in which (a) is a plan view, (b) is a side view, and (c) is a front view.

This 1st Embodiment is provided with the housing 1 which comprises a base body, and the planar view shape consists of squares, and the contact part 2 is provided in the housing 1 as shown to FIG. Doing. Each of the four corners of the housing 1 has an inclined surface 1a formed from the side to the upper surface. The contact portion 2 includes an outer circumferential fixed contact 3, a central fixed contact 4, a movable contact 5, and a dome-shaped reversing spring 6. The dome-shaped reversal spring 6 is made of rubber, has an outer circumferential portion 6a which is always fitted so that the outer circumferential fixed contact 3 and the outer circumference of the movable contact 5 are in contact, and optionally the movable contact 5. The projection part 6b which contact | connects is provided. Moreover, the movable contact 5 consists of the metal plate spring which the center part was cut out in the shape of a tongue piece, and this tongue piece part opposes so that a contact with a center fixed contact 4 can be possible and detachable.

The stem 7 is disposed on the dome-shaped reversal spring 6. As shown in FIG. 4, FIG. 5, this stem 7 is arrange | positioned inside the housing 1, the press part 7a which presses the dome-shaped reversal spring 6, and the engaging part formed in the circumferential side part. 7b and the operation part 7c to which external force is provided.

Moreover, the frame 8 which is fixed to the housing 1 and prevents the stem 7 from coming out is arrange | positioned at the upper surface of the housing 1. As shown in FIG. 6, the frame 8 is formed in a rectangular shape in plan view, has an opening 8a through which the operating portion 7c of the stem 7 protrudes, and a tapered portion formed at each of four corners. 8b and holes 8c formed in these tapered portions 8b.

The stem 7 is prevented from being pulled out by engaging the engaging portion 7b of the stem 7 with the lower surface of the frame 7.

As shown in FIG. 1, FIG. 3, FIG. 5, etc., each of the taper parts 8b formed in the four corners of the frame 8 is suitable for each of the inclined surfaces 1a formed in the four corners of the housing 1. As shown in FIG. The frame 8 is fixed to the housing 1 by fixing parts formed at four corners, for example, a caulking part 1b, with the frame 8 arranged on the housing 1.

7-10 is a figure which shows the state during the manufacture of 1st Embodiment mentioned above, FIG. 7 is a top view, FIG. 8 is a front view, FIG. 9 is the A2-A2 sectional drawing of FIG. 7, FIG. B2-B2 cross section.

As shown to these FIGS. 7-10, the convex part 1c is integrally formed in each of the inclined surfaces 1a located in the four corners of the housing 1. As shown in FIG. In the state in which the frame 8 is arrange | positioned in the housing | casing 1 so that these convex parts 1c may be inserted in each of the holes 8c of the frame 8, the front end of the convex part 1c will be settled by the punch which is tapered. Each is punched. As a result, as shown in FIG. 1, FIG. 5, etc., each of the convex parts 1c is deformed, and the caulking part 1b which comprises the said fixed part is formed.

As described above, this first embodiment does not protrude the fixing portion for fixing the frame 8 to the housing 1, that is, the caulking portion 1b from the surface portion where the opening 8a of the frame 8 is formed. It is set as the structure provided in the housing | casing 1 with the predetermined | prescribed arrangement area | region, for example, the inclined surface 1a to arrange | position.

In this first embodiment, when the key top (not shown) is pressurized by manual operation, the operating portion 7c of the stem 7 shown in FIGS. 4 and 5 is pressed, the stem 7 moves downward, and the dome shape is reversed. The spring 6 is bent so that the projection 6b contacts the tongue section of the movable contact 5. As a result, the center stationary contact 4 and the outer circumferential stationary contact 3 are conducted via the movable contact 5 to be switched on. When the pressure on the stem 7 is released, the tongue section portions of the dome-shaped reversal spring 6 and the movable contact 5 are returned by the elastic force retained by the stem 7 so that the movable contact 5 is removed from the center fixed contact 4. Falls. This cuts off the center stationary contact 4 and the outer peripheral stationary contact 3, and switches off.

In addition, when the dome-shaped reversal spring 6 returns, the engaging portion 7b of the stem 7 returned upward is engaged with the rear surface of the surface portion in which the opening 8a of the frame 8 is formed. . This prevents the stem 7 from falling out.

According to the 1st embodiment comprised in this way, the caulking part 1b which fixes the frame 8 to the housing 1 is located in the inclined surface 1a formed in the housing 1, ie, in the outer shape of the housing 1. Therefore, the dimension in the entire transverse direction can be maintained at the minimum dimension defined according to the outer shape of the housing 1. Moreover, since the caulking part 1b does not protrude upward from the surface part in which the opening 8a of the frame 8 is formed, the longitudinal dimension does not show the key which presses the operation part 7c of the stem 7 There is no fear of causing interference between the saw and the caulking portion 1b constituting the fixing portion. Thereby, the height dimension of the operating part 7c of the stem 7 can be set to the dimension low as corresponded to the height dimension of the caulking part 1b of the direction orthogonal to the inclined surface 1a. By these, miniaturization of this pushbutton switch can be realized.

In addition, by appropriately setting the shape dimensions of the inclined surface 1a, which is an arrangement area of the caulking portion 1b, the caulking portion 1b is formed from the side of the housing 1 and from the surface portion where the opening 8a of the frame 8 is formed. It can arrange | position so that it may not protrude.

In addition, by arranging the tapered portion 8b of the frame 8 on the inclined surface 1a of the housing 1, the frame 8 can be brought into close contact with the housing 1, whereby the frame 8 is attached to the housing 1. ) Can be fixed stably, and structural reliability can be secured.

In addition, since the frame 8 is fixed by the caulking part 1b in the four corners of the housing 1, the frame 8 can be fixed firmly, and structural reliability can be ensured also by this.

In addition, since each of the caulking portions 1b is integrated with the housing 1, there is no increase in the number of parts, which contributes to making the manufacturing cost low.

7 to 10, the frame 8 is disposed on the housing 1 so that the convex portion 1c formed in the housing 1 is inserted into the hole 8c of the frame 8. By punching the convex portion 1c with a punch, the caulking portion 1b can be easily formed, and the operation of forming the caulking portion 1b, that is, the fixing portion is simple.

In the above description of the first embodiment of the present invention, the movable contact 5 made of a metal plate is disposed between the dome-shaped reversal spring 6 and the fixed contacts 3 and 4, but instead of this, The movable contact may be integrally formed on the dome-shaped reversal spring 6, and a pair of central fixed contacts 4 may be provided to constitute the contact portion 2. The dome-shaped reversal spring 6 is formed of a conductive rubber, and the outer circumferential portion 6a is always in contact with the outer circumferential fixed contact 3 so that the projection 6b is brought into contact with and detached from the central fixed contact 4. You may comprise so that.

Second Embodiment

11 to 14 show a second embodiment of the present invention, FIG. 11 is a plan view, FIG. 12 is a front view, FIG. 13 is an A3-A3 sectional view of FIG. 11, and FIG. 14 is a B3-b3 sectional view of FIG. to be.

This 2nd embodiment consists of the caulking part 1d which deformed the convex part which the fixed part which fixes the frame 8 to the housing 1 integrally with the housing 1 by the flat punch. The upper surface of the caulking portion 1d is set uniformly, for example, with the surface portion of the frame 8 in which the opening 8a is formed. Other configurations are equivalent to those of the first embodiment shown in FIG. 1 to FIG. 6 described above.

2nd Embodiment comprised in this way also arranges the caulking part 1d in the inclined surface 1a which is a predetermined | prescribed area | region so that it may not protrude from the surface part of the frame 8 in which the side surface of the housing 1 and the opening 8a are formed. In this way, the same effects as those of the second embodiment can be obtained.

[Third Embodiment]

15 to 18 show a third embodiment of the present invention, FIG. 15 is a plan view, FIG. 16 is a front view, FIG. 17 is a sectional view A4-A4 of FIG. 15, and FIG. 18 is a sectional view B4-B4 of FIG. to be.

In the third embodiment, the recess 1e is formed at each of the four corners of the housing 1, and the step 8 in which the frame 8 is disposed at the recess 1e at each of the four corners ( 8d).

Convex formed integrally with the housing 1 in a hole formed in these stepped portions 8d in a state where the stepped portions 8d of the frame 8 are disposed in each of the recessed portions 1e of the housing 1. The portions are respectively inserted, and the fixed portions, that is, the caulking portions 1f are formed by punching these convex portions with a punch.

In this third embodiment, the recessed portion 1e of the housing 1 constitutes a predetermined arrangement area of the caulking portion 1f.

That is, this 3rd Embodiment also arrange | positions the fixing part which fixes the frame 8 to the housing 1, ie, the caulking part 1f, is arrange | positioned without protruding from the surface part in which the opening 8a of the frame 8 is formed. Is arranged by the recess 1e. Other configurations are equivalent to, for example, the first embodiment described above.

In the third embodiment, the caulking portion 1f for fixing the frame 8 to the housing 1 is formed by appropriately setting the shape dimensions of the recess 1e of the housing 1. It can arrange | position so that it may not protrude from the surface part in which the side surface and the opening 8a of the frame 8 are formed, and the effect similar to 1st Embodiment mentioned above is acquired.

In addition, by arranging the stepped portion 8d of the frame 8 in the recess 1e of the housing 1, the frame 8 can be brought into close contact with the housing 1, whereby the frame 8 is attached to the housing ( It can be fixed stably at 1), and the structural reliability can be secured.

Fourth Embodiment

It is a perspective view which shows 4th embodiment of this invention. It is a figure which shows the frame provided in 4th Embodiment of this invention, (a) is a top view, (b) is a side view, (c) is a front view.

In this fourth embodiment, each of the four corner portions 1g of the upper surface of the housing 1 constitutes a predetermined arrangement area of the fixing portion for fixing the frame 8 to the housing 1. Moreover, as shown in FIG. 20, the said fixing | fixed part is formed in the four corners of the frame 8, and consists of the wedge part 8e inserted in each of the corner parts 1g of the housing | casing 1. As shown in FIG. Other configurations are the same as, for example, the first embodiment described above.

Since 4th Embodiment comprised in this way also puts each of the wedge part 8e which fixes the frame 8 to the housing | casing 1 in each corner part 1g of the housing | casing 1, The effect similar to 1st Embodiment mentioned above is acquired, without the wedge part 8e protruding from the surface part in which the opening 8a of the frame 8 is formed.

In addition, since each of the wedge portions 8e is integrated with the frame 8, the number of parts is not increased. This contributes to making manufacturing cost low.

As described above, in the present invention, the fixing portion for fixing the frame to the housing has a structure in which the housing is provided with a predetermined arrangement area for arranging the fixing portion without protruding from the surface portion where the opening of the frame is formed. The height dimension of the operating part of the stem can be set as low as the dimension corresponding to the height dimension of the, thereby making it possible to easily realize the downsizing of the whole, which has been difficult in the past.

Claims (9)

delete A housing accommodating a contact portion including a movable contact therein; A stem disposed inside the housing and having a pressurizing part for urging the movable contact of the contact part, and a manipulation part protruding out of the housing to give an external force; A frame fixed to the housing and having an opening for projecting the operating portion of the stem, the frame preventing the stem from falling out; The housing is provided with a predetermined arrangement area for fixing the frame to the housing, without arranging from protruding from the surface portion in which the opening of the frame is formed, And the predetermined arranging area comprises an inclined surface formed from a side surface of the housing to an upper surface thereof. The method of claim 2, And the frame has a tapered portion disposed on the inclined surface. A housing accommodating a contact portion including a movable contact therein; A stem disposed inside the housing and having a pressurizing part for urging the movable contact of the contact part, and a manipulation part protruding out of the housing to give an external force; A frame fixed to the housing and having an opening for projecting the operating portion of the stem, the frame preventing the stem from falling out; The housing is provided with a predetermined arrangement area for fixing the frame to the housing, without arranging from protruding from the surface portion in which the opening of the frame is formed, And said predetermined arrangement area comprises a recess formed in said housing. The method of claim 4, wherein And the frame has a stepped portion disposed in the concave portion of the housing. A housing accommodating a contact portion including a movable contact therein; A stem disposed inside the housing and having a pressurizing part for urging the movable contact of the contact part, and a manipulation part protruding out of the housing to give an external force; A frame fixed to the housing and having an opening for projecting the operating portion of the stem, the frame preventing the stem from falling out; The housing is provided with a predetermined arrangement area for fixing the frame to the housing, without arranging from protruding from the surface portion in which the opening of the frame is formed, A pushbutton switch, characterized in that the shape of the housing is viewed in a plan view of the housing and the fixing parts are disposed at each of the four corners of the rectangle. A housing accommodating a contact portion including a movable contact therein; A stem disposed inside the housing and having a pressurizing part for urging the movable contact of the contact part, and a manipulation part protruding out of the housing to give an external force; A frame fixed to the housing and having an opening for projecting the operating portion of the stem, the frame preventing the stem from falling out; The housing is provided with a predetermined arrangement area for fixing the frame to the housing, without arranging from protruding from the surface portion in which the opening of the frame is formed, A convex portion is formed in the housing, and the fixing portion is a push button switch, characterized in that consisting of the caulking portion deformed the convex portion. The method of claim 7, wherein And the frame has a hole into which the convex portion is inserted. A housing accommodating a contact portion including a movable contact therein; A stem disposed inside the housing and having a pressurizing part for urging the movable contact of the contact part, and a manipulation part protruding out of the housing to give an external force; A frame fixed to the housing and having an opening for projecting the operating portion of the stem, the frame preventing the stem from falling out; The housing is provided with a predetermined arrangement area for fixing the frame to the housing, without arranging from protruding from the surface portion in which the opening of the frame is formed, The fixed part is formed in the frame, pushbutton switch, characterized in that consisting of a wedge portion to be embedded in the housing.

Images