KR19990006809A - switch - Google Patents

Abstract

(assignment)

In the conventional switch, since the cylindrical guide part 52b for guiding the operation part 53 is provided in the cover 52, since the cover 52 must be turned over and the operation part 53 must be inserted at the time of assembly. There is a problem that the assembly is complicated, the assembly is bad, and the cost is increased.

(Solution)

The switch of the present invention is provided with a cylindrical guide portion 1f in the case, and attaches the operation portion 6 to the guide portion 1f so as to be movable, and the flat cover 7 makes the case 1 Since the opening part is prevented, it can be assembled by fitting the operation part 6 and the cover 7 into the case 1 in order from the opening part side of the case 1, so that the assembling work is simple and easy to assemble. It can provide a good and inexpensive one.

Description

switch

The present invention relates to a push-type switch suitable for use in a detection sensor such as the presence of a cassette of a cassette tape recorder or the presence of a disc of a magnetic recording / playback apparatus.

In the push type switch used in a conventional cassette tape recorder or the like, as shown in Figs. 14 to 16, the box-shaped case 50 made of a molded product of an insulating material of synthetic resin has a recess 50a and a side wall 50b. A projection 50c formed in the casing, and a fixed contact 51 embedded in the case 50.

Moreover, the cover 52 which consists of molded articles of synthetic resin has the cylindrical guide part 52b which protruded upwards from the plate part 52a, and the some elastic arm part extended downward from the side end of the plate part 52a ( 52c).

The cover 52 covers the open portion of the case 50 so that the plate portion 52a is placed on the end surface 50d of the case 50, and the elastic arm portion 52c is placed on the case ( It hangs on the projection 50c of 50, and is attached to the case 50. As shown in FIG.

Moreover, the operation part 53 is inserted in the hole of the said guide part 52, the operation part 53 is attached so that a movement is possible, Moreover, the U-shaped movable contact piece 54 which consists of a metal plate is the case 50 of the case 50. This movable contact piece 54 is always pressed by the operation part 53 by the coil spring 55 accommodated in the recess 50a and attached to the recess 50a.

In order to assemble the switch having such a configuration, first, the coil spring 55 and the movable contact piece 54 are sequentially inserted into the recess 50a of the case 50.

Next, the cover 52 is turned upside down, and the operation part 53 is inserted through the hole of the guide part 52b in this state, and then the cover 52 is returned to its original state, and the plate-shaped part of the cover 52 is returned. The assembly is completed by engaging the 52a with the end face 50d of the case 50, and also engaging the elastic arm portion 52c with the protrusion 50c of the case 50.

Then, the switch pushes the operation part 53 downward against the elasticity of the coil spring 55, and the operation part 53 moves downward with the guide part 52b as a guide, and at the same time moves the movable piece 54. ) Moves downward, and the movable contact piece 54 comes in contact with the stationary contact point 51 to turn on the switch.

Moreover, when the operation part 53 is released, the movable contact 54 and the operation part 53 return to the original state by the elasticity of the coil spring 55, and the movable contact 54 is fixed to the fixed contact 51. Of the switch is turned off.

In this way, the operation of the switch is performed by the pressing operation of the operation unit 53.

The above switch is attached to the printed circuit board 56 by surface mounting, but this attachment places the bottom surface of the case 50 on the conductor 57 side of the printed circuit board 56 as shown in FIG. .

And the fixed contact 51 which is coincided with the bottom face is placed on the conductor 57, and the cream solder 58 is apply | coated here.

In this state, when the printed circuit board 56 is passed through a heating furnace (not shown), the cream solder 58 melts, and the fixed contact 51 is soldered to the conductor 57.

In the conventional switch, since the cylindrical guide part 52b for guiding the operation part 53 was formed in the cover 52, since the cover 52 should be turned over and the operation part 53 should be inserted at the time of assembly, There is a problem that the assembly is complicated, the assembly is bad and the cost is increased.

Moreover, since the elastic arm part 52c for attachment is formed in the cover 52 with the guide part 52b, the cover 52 is processed by shaping | molding, and cost increases.

In addition, the movable piece 54 and the coil spring 55 are required, and the number of parts is large, so that the cost is high.

In addition, when the switch is attached to the printed circuit board 56 for the support by the cream solder 58 only, the switch is displaced at a predetermined position due to the vibration during the movement of the printed circuit board 56 to the heating furnace. There is a problem.

In addition, since the attachment of the switch to the printed circuit board 56 is solely by solder, the solder is peeled off when the operation of the operation unit 53 or the excessive operation force is applied to the operation unit 53 when it is fitted and used in a set. There is a problem of being broken.

As a first solution for solving the problem, a cylindrical guide portion is provided integrally with the case in a case made of an insulating material such as synthetic resin, and the operation portion inserted into the guide portion is moved with the guide portion as a guide. It was set as the structure which attached the cover of the case to the end surface of the said case so that it may attach so that the opening part of the case might be prevented.

Moreover, as a 2nd solution means, it was set as the structure which attached the cover to the said case by providing the some latching arm part which has a some elasticity provided with the latching part integrally with the said case.

Further, as a third solution means, it is made of an insulating material such as synthetic resin, and includes a case having a hollow portion and a cylindrical guide portion, an operation portion having an operation portion provided at right angles with respect to the axial direction, and a metal plate. A J-shaped movable contact piece having a base part, a fixed contact point attached to the case, and a flat cover, wherein the operation part is inserted into the guide part and is movably attached to the guide part. The attachment base of the movable contact piece is placed on the end face of the case, and at the same time, the contact part is stored in the recess of the case, and the cover is placed on the end face to block the opening of the case, and between the cover and the case. The base portion of the movable contact piece is held in place, and by the movement of the operation portion, the operating portion moves the movable contact piece. The copper, and the movable contact piece contacts with a configuration so as to separate connected to the fixed contact.

Further, as a fourth solution means, a plurality of elastic locking arm portions provided with locking portions are provided integrally with the case, and the cover is attached to the case with the plurality of locking arm portions.

Moreover, as a 5th solution means, the recessed part was provided in the end surface of the said case, and the protrusion piece provided in the attachment base part of the said movable contact piece was made into the structure which fitted the said recessed part.

Moreover, as a 6th solution means, it was set as the structure which provided the elastic attachment arm part provided with the protrusion part and the locking part in the bottom part of the case which consists of insulating materials, such as synthetic resin.

In addition, as a seventh solution, the contact part and the attachment base part are made of an insulating material such as synthetic resin, and have a case having a hollow part and a cylindrical guide part, an operation part provided at right angles to the axial direction, and a metal plate. And a J-shaped movable contact piece, a fixed contact attached to the case, and a flat cover, wherein the operation portion is inserted into the guide portion and is movably attached to the guide portion. The attachment base of the contact piece is placed on the end face of the case, and at the same time, the contact part is stored in the recess of the case, and the cover is placed on the end face to block the opening of the case, between the cover and the case. The attachment base portion of the movable contact piece is held in place, and by the movement of the operation portion, the operating portion applies the movable contact piece. To, and the movable contact piece contacts with a configuration so as to separate connected to the fixed contact.

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

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

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

4 is an exploded perspective view of a part of the switch of the present invention.

5 is a cross-sectional view illustrating main parts of the A-A line of FIG. 3.

FIG. 6 is a cross-sectional view illustrating main parts of the B-B line of FIG. 3.

FIG. 7 is a cross-sectional view illustrating main parts of the C-C line of FIG. 3. FIG.

FIG. 8 is a plan view with the cover removed from FIG. 3.

FIG. 9 is a plan view of the operation unit removed from FIG. 8. FIG.

FIG. 10 is a plan view of the movable piece removed in FIG. 9; FIG.

11 is a sectional view showing the principal parts showing the arrangement of the fixed contact point in the switch of the present invention.

It is explanatory drawing for demonstrating operation | movement of the switch of this invention.

Fig. 13 is a sectional view showing the main parts of a state in which the switch of the present invention is attached to a printed board.

14 is a front view of a conventional switch.

15 is a partial cross-sectional side view of a conventional switch.

Fig. 16 is a sectional view of principal parts of a conventional switch.

17 is a sectional view showing the main parts of a state in which a conventional switch is attached to a printed board.

* Description of the symbols for the main parts of the drawings *

1: case 1a: bottom wall

1b: side wall 1c: end face

1d: partition wall 1e: digging section

1f: guide part 1g: hole

1h: notch groove 1j: groove

1k: recess 1m: locking portion

1n: Hanging arm part 1p: Protruding part

1q: Hanging part 1r: Attachment arm part

1s: convex portion 2: fixed contact

2a: contact portion 2b: terminal portion

3: fixed contact point 3a: contact point

3b: Terminal 4: Fixed contact

4a: contact section 4b: terminal section

5: movable contact 5a: contact part

5b: attachment base 5c: protrusion piece

6: operation part 6a: prismatic column

6b: cylindrical part 6c: operating part

7: cover 7a: hole

7b: notch 7c: protrusion

8: printed board 8a: hole

8b: hole 9: conductor

10: cream solder

Next, a switch of the present invention used in a cassette tape recorder or the like will be described with reference to Figs. 1 to 12. Fig. 1 is a front view of the switch of the present invention, Fig. 2 is a side view of the switch of the present invention, and Fig. 3 4 is an exploded perspective view of a part of the switch of the present invention, FIG. 5 is an essential cross-sectional view of the AA line of FIG. 3, FIG. 6 is an essential cross-sectional view of the BB line of FIG. 3, and FIG. 7 is an essential part of the CC line of FIG. 3. Fig. 8 is a plan view with the cover removed from Fig. 3, Fig. 9 is a plan view with the operation part removed from Fig. 8, Fig. 10 is a plan view with the movable contact removed from Fig. 9, Fig. 11 is a fixed contact of the switch of the present invention. Fig. 12 is an explanatory diagram for explaining the operation of the switch of the present invention.

The switch of the present invention shown in the drawings is a compact and push type that can be surface mounted, and as shown in Figs. 1 to 12, a box-shaped case 1 made of a molded article of an insulating material such as synthetic resin, It is provided in the part surrounded by the bottom wall 1a, the side wall 1b extended upward from the periphery of the bottom wall 1a, the end surface 1c located in the upper end of the side wall 1b, and the side wall 1b, Two recesses 1e formed by the wall 1d and protrude upwards from the open side of the recesses 1e adjacent to the recesses 1e, in the vicinity of the two opposing side walls 1b. It has two cylindrical guide parts 1f formed.

The two guide portions 1f form a rectangular cylindrical shape, and a rectangular hole 1g is formed in the center thereof, and the hole 1g and the recessed portion 1e are formed in a part of the outer circumferential wall. The notch groove 1h which connects continuously is formed.

Moreover, the notch groove 1h provided in each of the two guide parts 1f communicates with the other notch grooves 1e of the two hole portions 1e, respectively, and faces the notch groove 1h. The groove 1j is provided in the inner surface of the side wall 1b.

Moreover, in the said case 1, the recessed part 1k provided in the end surface 1c near the guide part 1f, the pair of convex parts 1s provided on the end surface 1c, and the opposing side wall 1b Are projected upward from the end face 1c side, and protrude to the outer surface of the plurality of elastic locking arm portions 1n and the bottom wall 1a, each of which has a locking portion 1m at its distal end. Similarly, the protruding portion 1p provided protrudes to the outer surface of the bottom wall 1a, and has a plurality of elastic attachment arm portions 1r having a locking portion 1q at the tip.

Moreover, as shown in FIG. 7, 11, and 12, the some fixed contact 2, 3, 4 is embedded in the bottom wall 1a of the said case 1, and the contact part 2a is attached. , 3a, 4a are exposed in the recess 1e, and the terminal portions 2b, 3b, 4b protrude outward of the case 1 in a state coinciding with the lower surface of the bottom wall 1a of the case 1. It is installed.

Moreover, the J-shaped elastic movable contact piece 5 which consists of metal plates, such as copper, has the contact part 5a at one end, and the flat base attachment part 5b at the other end, and this attachment base part On both sides of 5b, a pair of protrusion pieces 5c bent downward are provided. And this movable contact piece 5 fits the projection piece 5c in the recessed part 1k provided in the end surface 1c of the case 1, and attaches the attachment base part 5b to the end surface 1c, and At the same time, the contact portion 5a is housed in the recessed portion 1e.

In this way, the movable pieces 5 are respectively attached to the two digging portions 1e differently, and one of the two movable pieces 5 is fixed to the fixed contacts 2 and 3, and On the other hand, the other side is adapted to be detachable from the fixed contacts 3 and 4.

Moreover, especially the operation part 6 which consists of molded articles of insulation materials, such as synthetic resin, is integral with the prismatic part 6a in the axial direction of the prismatic part 6a and the prismatic part 6a, as shown in FIG. The cylindrical part 6b provided in the figure and the operation part 6c provided integrally with the prismatic part 6a in the direction orthogonal to the axial direction of the prismatic part 6a are provided.

And this operation part 6 inserts the prismatic part 6a into the hole 1g of the guide part 1f, and inserts the operation part 6c into the notch groove 1h and the groove 1m. The operation part 6 is movable up and down using the guide part 1f as a guide.

Moreover, especially the operation part 6c of the operation part 6 is in the state which elastically contacted the upper part of the movable contact piece 5, as shown to FIG. 5, FIG. When the operating portion 6 is moved downward while being in a state of being pressed upward, the movable contact piece 5 moves the attachment base portion 5b to the point by the operating portion 6c, and the contact portion 5a rotates. It is supposed to exercise.

Moreover, the flat cover 7 which consists of a metal plate, an insulating plate, etc. is a section for fitting the two holes 7a for inserting the guide part 1f, and the convex part 1s of the case 1 together. The connection part 7a and the protrusion part 7c provided in the opposing side part are provided.

And this cover 7 inserts the guide part 1f into the hole 7a, and fits the convex part 1s to the notch part 7b, and the case 7 with the cover 7 is carried out. The cover 7 is placed on the end face 1c so as to prevent the opening of the cover, and the protrusion 7c is hooked on the locking portion 1m of the locking arm portion 1n, so that the cover 7 is attached to the case 1. ) Is attached.

When the cover 7 is attached in this manner, the attachment base portion 5b of the movable contact piece 5 is sandwiched between the cover 7 and the end surface 1c as shown in FIG. 5, and the operation portion The operating part 6c of (6) is in contact with the inner surface of the cover 7 by the elasticity of the movable contact piece 5 which is in elastic contact with the stationary contact point 3.

Next, the method of assembling the switch of the present invention as described above will first be described. First, the contact portion 5a of the movable contact piece 5 from the open side of the case 1 in which the fixed contacts 2, 3, 4 are embedded. Is inserted into the recessed part 1e, the projection piece 5c of the movable contact piece 5 is fitted to the recessed part 1k, and the movable contact piece 5 is mounted on the end surface 1c.

Subsequently, the prismatic part 6a of the operation part 6 is inserted into the hole 1g of the guide part 1f, and the notch groove 1h of the guide part 1f and the groove 1j of the side wall 1b. ), The operation part 6c of the operation part 6 is fitted.

And finally, the guide part 1f is inserted through the hole 7a of the cover 7, and in this state, the protrusion part 7c is pushed against the elasticity of the latching arm part 1n, and the protrusion part 7c is carried out. ) And the cover 7 is attached to the case 1 to complete the assembly.

That is, the assembly is possible by fitting the movable contact piece 5, the operation part 6, and the cover 7 sequentially from the opening part side of the case 1. As shown in FIG.

Next, the operation of the push switch of the present invention as described above will be explained based on FIGS. 5, 11, and 12. In the state where the operation unit 6 is not operated, as shown in FIG. The movable contact 5 is at the contact point S1 in contact with the stationary contacts 2 and 3, and the other movable contact 5 is at the contact point S3 in contact with the stationary contacts 3 and 4, and 3 Stationary contacts 2, 3 and 4 are in a conductive state.

In this state, as shown in FIG. 12 from the state shown in FIG. 5, when one operation part 6 is pressed, the operation part 6 will move downward with guide part 1f as a guide, and the operation part 6c will be made. Press one movable contact piece (5).

Then, this movable contact piece 5 rotates the contact part 5a with the attachment base part 5b as a point, and moves to the contact point S2 from the contact point S1, as shown in FIG. The contact with (2) is in a separated state, and the fixed contacts 3 and 4 are in a state in which conduction is maintained.

In this state, when one of the operation portions 6 is released, the operation portion 6c is pushed back by the elasticity of the movable contact piece 5, and the operation portion 6 is returned to its original state as shown in FIG. At the same time, the movable contact piece 5 also returns to its original state, and as shown in Fig. 11, the contact point S2 becomes the contact point S1, and the fixed contacts 2, 3, and 4 are in a conductive state.

In addition, when the other operation part 6 is pressed, the same operation | movement as above is performed, but the movable contact piece 5 moves from the contact point S3 to the contact point S4, as shown in FIG. The contact of 3 and 4 falls off, and the fixed contact 2 and 3 are in the state which maintained conduction.

Moreover, when releasing the other operation part 6, the same operation as the above is performed, but as shown in FIG. 11, the movable contact piece 5 becomes the contact point S3 from the contact point S4, and is fixed. The contacts 2, 3 and 4 are brought into a conductive state.

In this manner, the switch is operated, but the switch can be operated even when the two operation units 6 are released at the same time.

Such a switch is attached to the printed circuit board 8 by surface mounting. However, as shown in Fig. 13, the switch has two holes 8a and 8b in the printed circuit board 8 on which the conductor 9 is formed. ) Is installed.

Then, in a state where the bottom wall 1a of the case 1 is placed on the upper surface of the printed board 8, the projection 1p of the case 1 is fitted into the hole 8a of the printed board 8, and the case (1) is positioned, the attachment arm portion 1r of the case 1 is press-fitted into the hole 8b of the printed circuit board 8, inserted and passed through, and the locking portion 1q is inserted into the printed circuit board 8. The case 1 is firmly attached to the printed circuit board 8.

And in this state, the cream solder 10 is apply | coated to the terminal part 2b, 3b, 4b of the fixed contact 2, 3, 4, and the conductor 9. As shown in FIG.

In this state, when the printed circuit board 8 is passed through a heating furnace (not shown), the cream solder 10 melts, and the fixed contacts 2, 3, and 4 are soldered to the conductor 9.

In such a surface mounting, even if the printed circuit board 8 vibrates, the switch is firmly supported by the attachment arm portion 1r, so that the switch does not shift at a predetermined position and eliminates solder failure. Can be.

In the switch of the present invention, the cylindrical guide portion 1f is provided on the case 1, the operation portion 6 is movably attached to the guide portion 1f, and the case (with a flat cover 7) is provided. Since the opening part of 1) is prevented, it can be assembled by aligning the operation part 6 and the cover 7 to the case 1 sequentially from the opening part side of the case 1, and the assembly operation is simple and easy, Good assemblability can be provided.

In addition, since the cover 7 can be formed into a flat plate, a molded article is not required, and an inexpensive part can be used, and an inexpensive switch can be provided.

In addition, since the cover is attached to the locking arm portion 1n provided in the case 1, the cover 7 can be assembled by pushing the locking arm portion 1n into an operation, so that the assembly is simple and the case Since the locking arm part 1n is provided in (1), the molded article can be made only in the case 1, and an inexpensive switch can be provided.

Moreover, since the attachment base part 5b of the movable contact piece 5 was attached between the end surface 1c of the case 1 and the cover 7, attachment of the movable contact piece 5 and the cover 7 was carried out. Since the assembly is simple and the assembly thereof is simple, and the movable contact piece 5 also serves as a return spring for the operation of the operation unit 6, the number of parts is small, thus the assembly is good and the number of parts It is possible to provide a low cost switch.

In addition, since the cover is attached to the catching arm portion 1n provided in the case 1, the cover 7 can be assembled by pushing the cover 7 into the catching arm portion 1n in addition to the above effect. Since it is simple and can assemble better, and also has the locking arm part 1n in the case 1, a molded article can be made only in the case 1, and an inexpensive switch can be provided.

Moreover, since the projection piece 5c of the movable contact piece 5 was fitted to the recessed part 1k of the end surface 1c of the case 1, the positioning at the time of assembly of the movable contact piece 5 is assured. It is easy and easy to assemble, the attachment of the movable contact piece 5 is ensured, operation of a switch is assured, and it can provide a stable thing.

In addition, since the projection 1p and the attachment arm portion 1r are provided at the bottom of the case 1, the positioning of the switch to the printed circuit board 8 is assured, and the attachment strength can be increased. When the printed circuit board 8 moves to the heating furnace, there is no positional shift of the switch due to vibration or the like, there is no solder unevenness, and there is no solder defect.

Moreover, even if it puts together in this set and the operation operation of the operation part 6 or the excessive operation force is applied to the operation part 7, the solder will not peel and be damaged.

Further, since the attachment base portion 5b of the movable contact piece 5 is attached between the end face 1c of the case 1 and the cover 7, in addition to the above effect, the movable contact piece 5 and the cover ( The attachment of 7) only overlaps, and its assembly is simple, and since the movable contact piece 5 also serves as a return spring for the operation of the operation part 6, the number of parts is small, and therefore, the assemblability It is possible to provide a low cost switch with a small number of parts.

Claims (7)

In a case made of an insulating material such as synthetic resin, a cylindrical guide portion is provided integrally with the case, and an operation portion inserted into the guide portion is movably attached with the guide portion as a guide, and the opening portion of the case And a flat cover on the end face of the case. The switch according to claim 1, wherein a plurality of elastic catching arm portions having a catching portion are provided integrally with the case, and the cover is attached to the case with the plurality of catching arm portions. A J-shaped movable contact piece made of an insulating material such as a synthetic resin, having a hollow portion and a cylindrical guide portion, an operating portion provided at right angles with respect to the axial direction, a J-shaped movable contact portion having a contact portion and an attachment base portion made of a metal plate, And a fixed contact attached to the case, and a flat cover, wherein the operation portion is inserted into the guide portion and is movably attached to the guide portion, and the base portion of the movable contact piece is attached to the case. At the same time, the contact portion is placed in the recess of the case, and the cover is placed on the end surface to block the opening of the case, and the attachment base of the movable contact piece is sandwiched between the cover and the case. By the movement of the operation unit, the operation unit moves the movable contact piece, thereby contacting the movable contact piece. Switch, characterized in that to separate access to the parts of the fixed contacts. 4. The switch according to claim 3, wherein a plurality of elastic catching arm portions having a catching portion are provided integrally with the case, and the cover is attached to the case with the plurality of catching arm portions. The switch according to claim 3 or 4, wherein a recess is provided on the end face of the case, and the projection piece provided on the attachment base of the movable contact piece is fitted into the recess. A switch comprising a resilient attachment arm portion provided with a protrusion and a locking portion at a bottom of a case made of an insulating material such as synthetic resin. The J according to claim 6, comprising a case made of an insulating material such as a synthetic resin, the case having a hollow portion and a cylindrical guide portion, an operation portion provided at right angles with respect to the axial direction, and a metal plate made of a contact portion and an attachment base portion. A movable movable piece having a magnetic shape, a fixed contact attached to the case, and a flat cover, wherein the operation portion is inserted into the guide part and is movably attached to the guide part. The attachment base is placed on the end face of the case and at the same time, the contact part is stored in the recess of the case, and the cover is placed on the end face to block the opening of the case, and the movable contact between the cover and the case is placed. The convenient attaching base portion is sandwiched and the operation portion moves the movable contact piece by moving the operation portion. Switch, characterized in that the movable contact piece connected to the contact portion so as to separate the fixed contacts.