TW541551B - Push-button switch - Google Patents

Abstract

The present invention provides a push-button switch which can secure an operation stroke of a movable contact, and of which the housing outline can be made small. This push-button switch comprises a plurality of arm parts 5b extending continuously in the crossing directions from a reversible expanded part 5a in a round-topped movable contact 5, housing recessed parts 1c formed at four corners on diagonal lines of a housing 1 for housing in a bendable manner each arm part 5b of movable contacts 5 connected to a housing part 1a, and one or more circumferential fixed contacts 2c for having a contact always with the arm part 5b are arranged in the recessed part 1c.

Description

541551 A7 B7

V. Description of the invention (P [Technical field to which the invention belongs] The present invention relates to a push button switch that uses a push to reverse a dome-shaped movable contact and separate contact contact, and particularly relates to a dome-shaped movable contact. [Advanced technology] The structure of a conventional push button switch is shown in Figs. 12 and 13. Fig. 12 is a plan view of the push button switch, and Fig. 13 is a longitudinal sectional view of the push button switch. A conventional push button switch includes a square-shaped housing 1 1 having a storage portion 1 1 a; a central fixed contact 1 2 a and a first peripheral fixed connection provided in the storage portion 1 1 a of the housing 11 Point 1 2b and the second peripheral fixed contact 1 2 c; the lower movable contact 1 4 disposed on the central fixed contact 1 2 a and the first peripheral fixed contact 1 2 b; the lower movable contact 1 4 The upper movable contact 15 on the contact 14 and the second peripheral fixed contact 1 2 c; the cover sheet 17 and the frame 18 which cover the storage portion 1 1 a and are mounted on the upper surface of the housing 1 1. The casing 11 is a rectangular box shape formed of an insulating material such as synthetic resin, and has a circular shape inside. The storage portion 1 1 a. The center of the storage portion 1 1 a is provided with a central fixed contact 1 2 a made of a conductive metal material, and is exposed on the inner bottom surface. The central fixed contact 1 2 The outer side of a is more prominent than the central fixed contact point 1 2 a. A first peripheral fixed contact point 1 2 b similarly made of a conductive metal material is provided. Here, the first peripheral fixed contact point is provided. The outer side of point 12b applies the Chinese National Standard (CNS) A4 specification (210X297 mm) at this paper size. &Quot; " ~ -4-(Please read the precautions on the back before filling this page) C ·, ιτ Economy Printed by the Ministry of Intellectual Property Bureau's Consumer Cooperatives 541551 A7 B7 V. Description of the invention (2) A more prominent state, equipped with a second peripheral fixed contact 12 c which is also made of conductive metal material. (Please read the back first (Notes on this page, please fill in this page) The aforementioned lower movable contact 14 is a circular shape with a small diameter formed by a conductive metal plate, and a dome shape with a reversible bulged portion 1 4 a is formed in the center. The upper movable contact 15 is similarly made of a conductive metal plate It has a circular dome shape with a reversible bulge portion 15a in the center, and its outer diameter is larger than the outer diameter of the lower movable contact 14. The lower movable contact 14 is housed in In the case of the storage portion 1 1 a, the center of the bulging portion 1 4 a and the central fixed contact point 1 2 a arranged on the storage portion 1 1 a face each other, and the periphery of the lower movable contact point 14 is arranged. The part is placed in contact with the first peripheral fixed contact 1 2 ^. At this time, an annular inner wall 1 protruding along the outer peripheral part of the lower movable contact 14 is formed on the storage part 1 1 a. 1 b. Then, the inner wall 1 1 b of the accommodating portion 1 1 a of the housing 11 is deformed inward, and the outer peripheral portion of the lower movable contact 14 is directly riveted and fixed. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the outer peripheral portion of the lower movable contact 14 is riveted and fixed to the casing 11 so that the peripheral portion of the lower movable contact 14 is always fixed to the first peripheral contact 1 2 In the “b-contact”, the lower movable contact 14 can be used as a switch conduction path with the aforementioned movable contact 15. Then, the bulged portion 15 a of the upper movable contact 15 is arranged so as to face each other so as to cover the lower movable contact 1 4 ′ so as to abut the peripheral portion of the movable contact 15 to the second peripheral fixed contact. It is placed on the point 1 2 c, and the contact portions are stored in the storage portion 1 1 a. The aforementioned cover sheet 17 is formed of a resin sheet having a generally square shape, and the Chinese National Standard (CNS) A4 specification (541541 A7 B7) is applied to the i-paper scale. 5. Description of the invention (3) (Please read the precautions on the back before filling (This page) When the upper movable contact 15 is operated, it can be used as the contact part of the operation part such as the key top, and it can be installed on the storage part 1 1 a to cover the housing 11 to prevent the aforementioned. The upper movable contact i 5 jumps out, and foreign matter such as dust intrudes into the contact portion. The frame 18 is formed into a substantially square shape by a plate-shaped metal plate, and a large window hole portion 18 a is provided in the center. A pair of side plates (not shown) that are bent vertically are provided on the sides, and the side plates are locked on the sides of the casing 11 to mount the frame 18 on the casing 11. At this time, the cover sheet 1 7 In the state exposed from the aforementioned window hole portion 18a, the upper movable contact 15 can be pressed from above to perform a reverse operation. When an operation portion such as a key top (not shown) is used, the window hole portion 18a When the aforementioned cover sheet 17 is pressed, the The upper movable contact 1 5 is reversed and contacts the lower movable contact 1 4 to switch the switch click (c 1 ick) feeling and contact of the first stage. By re-pressing, the lower movable contact 1 4 is reversed. Turn and contact the central fixed contact 1 2 a to switch between the click and contact of the second stage, so as to obtain a double-acting push button switch. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Problem] However, in the structure of the conventional push button switch described above, the upper movable contact 15 and the lower movable contact 14 are formed of a conductive metal plate with a reversible bulging portion 15a at the center. 1 4 a circular dome shape, in order to increase the movable stroke of each movable contact, a movable contact having a large outer diameter is required, and the storage portion 1 1 a of the housing 1 1 for storing the contact must be enlarged, There is a problem that the outer shape of the casing 11 is enlarged. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) -6- 541551 A7 __ B7 V. Description of the invention (4) (Please read first Note on the back, please fill out this page) Therefore, the present invention is to solve An object of the present invention is to provide a structure of a push button switch, which can ensure the moving stroke of a movable contact and reduce the size of the outer shape of the case. [Means for solving the problem] In order to solve the foregoing problem, the present invention The first means of the invention is characterized in that: the switch includes: a housing having a housing portion; a central fixed contact disposed on an inner bottom surface of the housing portion of the housing; a peripheral fixed contact disposed outside the central fixed contact; And the center of the bulging portion is arranged opposite to the central fixed contact, and the peripheral portion is always a dome-shaped movable contact that is in contact with the peripheral fixed contact; on the movable contact, the drum is reversed. A plurality of wrists are extended in the cross direction one after another, and a receiving recess is formed on the four corners of the diagonal line of the casing, and the receiving recess is connected to the receiving part to receive the movable joint flexibly. The receiving recesses of the respective wrists of the dots are provided on the receiving recesses with the aforementioned peripheral fixed contacts that are in constant contact with at least one of the aforementioned wrists. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs as the second means, the switch includes: a housing with a housing; a central fixed contact provided on the bottom surface of the housing of the housing; The first peripheral fixed contact outside the fixed contact; the second peripheral fixed contact disposed further outside the first peripheral fixed contact; the center of the bulging portion is disposed opposite the central fixed contact, and the peripheral portion A dome-shaped lower movable contact that is always in contact with the fixed contact around the table 1; and a larger diameter than the shape of the lower movable contact, a bulging portion is oppositely provided to cover the lower movable contact, and Peripheral part and the aforementioned second peripheral solid paper size apply Chinese National Standard (CNS) A4 specification (210x297 mm) -7- 541551 A7 B7 V. Description of invention (5) (Please read the precautions on the back before filling this page ) The dome-shaped upper movable contact that the fixed contact always contacts; on the upper movable contact, a plurality of wrists are extended in the cross direction successively with the reversible bulge; on the diagonal of the shell line A receiving recess is formed on the four corners of the receiving recess. The receiving recess is connected to the receiving part and is used to flexibly receive the wrist portions of the upper movable contact. In the receiving recess, at least one of the wrists is provided. The second peripheral fixed contact that is in constant contact. As a third means, the lower movable contact has a substantially circular dome-shaped outer diameter, and has a smaller diameter than an outer diameter of a wrist portion extending the upper movable contact. As a fourth means, the housing recessed portion of the housing has a front wall portion facing the front end portion of the wrist portion, and a side wall portion facing the both side portions of the wrist portion, forming the front wall portion and the side wall portion. The gap formed by the side wall portion and the side portion of the wrist portion is narrower than the gap formed by the front wall portion and the front end portion of the wrist portion. As the fifth means, the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, wherein the wrist portion is formed by a narrow inclined surface from the base portion to the front end portion of the side portion, imitating the inclined portion of the inclined surface and the direction The parallel portion in which the front wall portion is expanded forms a side wall portion of the receiving recessed portion. As a sixth means, the peripheral fixed contact or the second peripheral fixed contact is arranged in a pair of the receiving recesses on a diagonal line of the case, and a bottom surface of the other pair of the receiving recesses intersected therewith. Form a lower contact surface with the peripheral fixed contact or the second peripheral fixed contact. This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) -8-541551 A7 B7 V. Description of the invention (e) [Implementation mode of the invention] (Please read the precautions on the back before filling this page) The following An embodiment of the push switch of the present invention will be described with reference to FIGS. 1 to 11. Fig. 1 is a plan view of a push button switch; Fig. 2 is a longitudinal sectional view of the same push button switch; Fig. 3 is a plan view showing the engagement state of the housing and the upper movable contact; Fig. 4 is a view showing the housing and the lower movable contact Plan view of the fixed state; Figure 5 is a plan view of the housing; Figure 6 is a plan view of the upper movable contact; Figure 7 is a plan view of the lower movable contact; Figure 8 is a plan view of the adhesive sheet; Figure 9 is no operation Fig. 10 is an operation explanatory diagram at the first stage of conduction; Fig. 11 is an operation explanatory diagram at the second stage of conduction. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In the figure, the casing 1 is formed of an insulating material such as synthetic resin. The casing 1 has a receiving portion 1 a and has a rectangular shape and an open box shape. The storage portion 1 a is formed by a concave, substantially circular base portion 1 b formed in the center of the case 1, and four corner portions connected to the base portion 1 b and extending on a diagonal line of the case 1. A substantially rectangular receiving recess 1 c is formed. The side wall portion of the accommodating recessed portion 1 c is an inclined portion 1 d which forms a narrow width toward the front wall portion on the connection portion with the base portion 1 b, and a parallel portion 1 e which extends in parallel from the inclined portion 1 d. form. In the center of the aforementioned base portion 1b, a substantially circular groove portion 1f is formed at a position lowered by one step. In this recessed portion 1, the lower movable contact 4 to be described later is housed, and the upper movable contact 5 is housed in the aforementioned base portion 1b and the receiving recessed portion 1c, covering the lower movable contact. A central fixed contact made of a conductive metal material is arranged in the center of the inner bottom surface of the storage portion 1 a of the casing 1 in a state exposed from the upper side. The paper size is in accordance with Chinese National Standard (CNS) A4 (210X 297) (Centi) _ 541551 A7 B7 _ V. Description of the invention (7) (Please read the precautions on the back before filling out this page) 2 a, in the position facing the central fixed contact 2 a, to compare with the center In a state where the fixed contact 2 a is more prominent, a first peripheral fixed contact 2 b made of a conductive metal material is similarly provided. In addition, at a position outside the first peripheral fixed contact 2b, a pair of the receiving recesses 1c on the diagonal of the case 1 is provided in a more protruding state, and is similarly made of a conductive metal material. The second peripheral fixed contact 2 c is formed. Then, the bottom surfaces of the other pair of receiving recesses 1 c intersecting therewith are formed lower than the contact surfaces of the second peripheral fixed contact 2 c. In addition, on the outer surface of the housing 1 opposite to each other, a circuit board connection to a device, such as a machine, is drawn from the central fixed contact 2 a and the first and second peripheral fixed contacts 2 b and 2 c and protrudes outward. Connection terminals 3 a, 3 b, 3 c. The lower movable contact 4 is formed in a circular shape with a small diameter formed by a conductive metal plate, and is formed in a dome shape with a reversible bulging portion 4a at the center. Then, below the top of this bulging portion 4a is a central contact portion which forms contact with the aforementioned central fixed contact 2a. The upper movable contact 5 printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is similarly formed of a conductive metal plate in the shape of a dome with a reversible bulge 5 a in the center, and the bulge 5 a is formed one after another. The plurality of wrists 5 b extending in the cross direction are all cross-shaped. The outer diameter connecting the arms 5b is larger than the outer diameter of the lower movable contact 4 described above. In addition, the side portion of the wrist portion 5b is formed by an inclined surface 5c having a narrow width from the base end portion to the front end portion, and the inclined surface 5c and the inclined portion 1d of the accommodating recessed portion 1c are formed to imitate each other. In the case where the lower movable contact 4 is stored in the storage portion 1 a, the paper size of the paper applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -10- 541551 A7 _______ B7 V. Description of the invention (〇) (Please read the precautions on the back before filling in this page) In the case, 'Place the center of the dome-shaped bulging part 4a and the center of the storage part 1a facing the central fixed contact 2a, and move the lower part. The peripheral portion of the contact 4 is placed in contact with the pair of first peripheral fixed contacts 2 b. At this time, a substantially circular groove portion 1 f is formed along the outer peripheral portion of the lower movable contact 4 at a lowered position of the storage portion 1 a, and the lower movable contact 4 is housed in the recessed groove. In section 1f, positional restrictions are imposed on the outer peripheral section. On the upper side of the lower movable contact 4, a ring-shaped adhesive sheet 6 having a through hole 6a formed in the center is mounted so as to cover the upper side of the lower movable contact 4. The annular portion of the adhesive sheet 6 is used. 6 b Next, the periphery of the lower movable contact 4 and the entire periphery of the edge portion of the recessed portion 1 f are maintained to maintain the lower movable contact 4 in the recessed portion 1 f Employee Consumer Cooperative, Intellectual Property Bureau, Ministry of Economic Affairs It is printed in this way, because the groove portion 1 f is used, the positioning of the adhesive sheet 6 by the lower movable contact 4 can be easily fixed and fixed, and the adhesive portion 6 covers the groove portion 1 f and the lower movable contact 4. The gap between the outer perimeters reduces dust intrusion. The adhesive sheet 6 is formed of a flexible resin sheet having an adhesive layer formed on one surface. Even when the dome-shaped bulged portion 4 a of the lower movable contact 4 is reversed by a pressing operation, The ring sound P 6 b may be attached to the lower movable contact 4 and the accommodating portion 丨 a in a reverse motion. Also, "the top of the bulging portion 4a of the lower movable contact 4 is exposed from the through hole 6a of the adhesive sheet 6, so it can be in contact with the upper movable contact 5" using the ring of the adhesive sheet 6 described in BU状 部 6 ^ Apply the aforementioned paper size to the Chinese National Standard (CNS) A4 specification (2 丨 0X297 mm) -11-541551 A7 B7 V. Description of the invention (g) (Please read the precautions on the back before filling this page ) The peripheral portion of the T movable contact 4 is then held on the storage portion 1 a. The peripheral portion of the lower movable contact 4 is always in contact with the first peripheral fixed contact 2 b. The lower movable contact 4 can be used as The above-mentioned switching path of the upper movable contact 5 is used. When the upper movable contact 5 is housed in the storage portion 1 a, 'the bulged portion 5 a of the upper movable contact 5 is arranged so as to face each other at the center' so as to cover the upper surface of the lower movable contact 4. Then, the wrist portion 5 b of the upper movable contact 5 is located in the receiving recess 1 c of the receiving portion 1 a, and the peripheral portion of the wrist portion 5. B abuts on the second peripheral fixed contact 2 c. And placed. At this time, since each of the I portions of the wrist portion 5 b is formed by a narrow inclined surface formed from a base end portion to a front end portion, the inclined surface 5 c of the wrist portion 5 b and the side wall portion of the receiving recess 1 c Since the inclined portions 1 d are formed to imitate each other, the position of the upper movable contact 5 is restricted by the inclined surface 5 c and the inclined portion χ d. This is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The upper part is formed by the inclined surface 5 c on the side of the wrist 5 b and the inclined portion 1 d on the side wall of the receiving recess 1 c housing the wrist 5 b. Since the position of the movable contact 5 is restricted, the gap G 1 formed by the side wall portion and the side portion of the wrist portion 5 b is formed by forming the front wall portion and the side wall portion, as compared with the space formed by the receiving recess 1 c. The gap G 2 formed by the front wall portion and the front end portion of the wrist portion 5 b is narrow, so that the gap G 2 between the front wall portion of the receiving recess 1 c and the front end portion of the wrist portion 5 b can be set to be wide. When the upper movable contact 5 is pressed, the front end of the wrist 5 b does not come into contact with the upper wall and is not limited. Therefore, it does not affect the feeling of movement during reversal, and it can be used to set the paper size with high accuracy. Applicable to China National Standard (CNS) A4 specification (210X297 mm) -12- 541551 A7 _B7 V. Description of the invention (4 digits. Also, because the side of the aforementioned wrist 5b is narrow from the base end to the front end. An inclined surface 5 c is formed, and this inclined surface 5 〇 The inclined portions 1 d of the side wall portion of the receiving recess 1 c are formed to imitate each other. Therefore, it is possible to reduce the reduction between the wrist portion 5 b and the receiving recess 1 c caused by the movement of the movable contact 5, thereby preventing cutting debris and the like. It affects the contact failure caused by the contact and improves the reliability of the contact. Also, the pair of the receiving recesses 1 c intersects with the receiving recess 1 c on one of the diagonal lines of the housing 1 provided with the second peripheral fixed contact 2 c. The bottom surface of the recess 1 c is lower than the contact surface with the wrist portion 5 b of the aforementioned 2 c. Therefore, the peripheral fixed contact 2 c contacts the wrist portion 5 b to avoid contact with the bottom surface of the receiving recess 1 c. In addition, since the movable contact 4 placed on the upper movable contact portion has a small diameter formed by a plurality of diameters in the cross direction of the upper movable contact, the outer diameter is formed in a substantially circular shape. If the front wrist portion 5 b is disturbed, it is placed on the housing 1 and positioned in the rotation direction, so that it can be easily installed. In this case, when the lower movable receiving portion 1 a is placed in the aforementioned receiving portion 1, a fixed contact 2 in a b Above, to abut the peripheral portion of the state of the contacts 4, but the more the periphery of the first central fixed contact 2 a higher, the back surface of the f read to read the note 'precautions, then fill Page}

The second peripheral fixed contact can reliably prevent the second lower dome shape of the lower side of the other wrist portion 5 b 5 from the upper movable contact 5 that extends between the wrist portions 5 b and It is not necessary to store the point 4 in the first week of the previous configuration. Place the lower movable fixed contact 2 b. The movable contact 4 of the forming part 4 The stable consumer goods cooperative of the Intellectual Property Bureau of the Ministry of Economy (CNS) M specifications (210X 297 mm) 13- 541551 A7 B7

5. Description of the invention (A is fixedly placed on the first peripheral fixed contact 2 b, and the operation stroke when the dome-shaped bulged portion 4 a is reversed is ensured, so the operation feeling is good. Similarly, the second peripheral fixed contact 2 c and the upper movable contact 5 also form the second peripheral fixed contact 2 ε higher than the first peripheral fixed contact 2 b. Therefore, the movable contact 5 may It is stably placed on the second peripheral fixed contact 2 c, and the operation stroke when the dome-shaped bulged portion 5 a is reversed can be ensured, so the operation feeling is also good. The opening of the storage portion 1 a A cover sheet 7 made of a resin sheet having a substantially square shape is mounted on the upper movable contact 5. The cover sheet 7 is a dome-shaped bulged portion 5 fixed to the upper movable contact 5. On the upper surface of a, the peripheral portion of the upper movable contact 5 is brought into contact with the second fixed contact 2 c. When pressed, it acts as a thin sheet for operation and covers the storage portion. 1 a, and installed on it to prevent the movable contact 5 from flying out and dust Those who invade into the contact portion. The frame 8 is formed into a substantially square shape by a plate-shaped metal plate, and a large window hole portion 8 a is provided in the center. A pair of 1 plates that are vertically bent are provided on the side. (Not shown), the frame 8 is mounted on the housing 1 by fixing the side plate to a fixing portion (not shown) provided on the side of the housing 1 °. At this time, between the frame 8 and the upper housing 1 The cover sheet 7 'is interposed therebetween to form the cover sheet 7—a part of the cover sheet 7 is exposed from the window hole portion 8a. Hereinafter, the operation of the push-button switch having the above configuration will be described with reference to FIGS. 9 to 11. Read the notes on the back and fill out this page) Order the paper printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size applies to the Chinese National Standard (CNS) A4 specification (2) 0 × 297 mm. -14- 541551 A7 B7

V. Description of the invention (A (Please read the precautions on the back before filling out this page) As shown in Figure 9, when the switch is in a non-pressing operation state, the peripheral part of the upper movable contact 5 is the same as the second peripheral part. The fixed contact 2 c contacts, but the dome-shaped bulged portion 5 a is separated from the lower movable contact 4, and the peripheral portion of the lower movable contact 4 is connected to the first peripheral fixed contact 2 b. Contact, but the dome-shaped bulging portion 4a is separated from the central fixed contact 2a, and the upper and lower sections of the switch are in the off state. From this state, as shown in Fig. 10, the When the operation portion such as the key top 9 is pressed and operated by the window hole portion 8 a of the frame 8, the upper surface of the bulged portion 5 a of the upper movable contact 5 fixed to the lower surface side of the cover plate 7 is pressed, and This bulged portion 5 a is pressed downward. At this time, the bulged portion 5 a of the upper movable contact 5 is pressed downward, so the upper movable contact 5 forms the bulged portion 5 a downward. Therefore, the lower surface of the bulged portion 5 a and the bulged portion 4 a of the lower movable contact 4 are reversed. Contact, the upper and lower movable contacts 4, 5 are used as conduction paths, and the second peripheral fixed contact 2c and the first fixed contact 2b are conducted, and the first stage (upper) switch is turned on. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. When the key top 9 is further pressed from this state as shown in FIG. 11, the upper portion of the bulging portion 4 a of the lower movable contact 4 is subjected to the above. The bulged portion 5 a of the upper movable contact 5 is pressed downward, so that the bulged portion 4 a is depressed downward. At this time, 'the bulged portion 4 a of the lower movable contact 4 is pressed downward, so The lower movable contact 4 is formed so that the bulging portion 4 a is reversed downward. Therefore, the lower surface of the bulging portion 4 a and the central fixed connection are in accordance with the Chinese National Standard (CNS) A4 specification (210 × 29Τ ^) ~ --15- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 541551 A7 ___ B7 V. Description of the invention (contact 2a, but via the lower movable contact 4 to make the aforementioned first peripheral fixed contact 2b and the aforementioned The central fixed contact is connected between 2a, and the second section (lower ) The switch is turned on. In this way, when the cover sheet 7 is pressed with the key top 9, the upper movable contact 5 is reversed and contacts the lower movable contact 4 to perform the click and connection of the first stage switch. The point is switched by further pressing. The lower movable contact 4 is reversed and contacts the central fixed contact 2a. The second stage clicks and contacts are switched to obtain a dual-action button switch. When the pressing force on the key top 9 is released from this state, the bulged portions 4 a and 5 a of the upper and lower movable contacts 4 and 5 are reversed with their own elasticity and return to the initial state, and Using the spring pressure at this time, the key top 9 is pressed upward and returned to the initial position. At this time, as the bulged portions 4 a and 5 a of the upper and lower movable contacts 4 and 5 are reversed, the lower surface of the bulged portions 4 a and 5 a forms the upper surface from the lower movable contact 4. It is separated from the central fixed contact 2a, and the switches of the first stage and the second stage are turned off. Furthermore, according to the aforementioned structure, a ring-shaped adhesive sheet 6 having a through hole 6 a in the center is provided on the storage portion 1 a of the housing 1 so as to cover the upper surface of the lower movable contact 4. The through hole 6 a of the adhesive sheet 6 exposes the top of the bulged portion 5 a of the lower movable contact 5 and is arranged to be in contact with the upper movable contact 5. The annular portion 6 of the adhesive sheet 6 is b The peripheral portion of the lower movable contact 4 is then held on the receiving portion 1 a of the casing 1 over the entire circumference, so that it can be placed in a contactable manner through the through hole 6 a of the adhesive sheet 6. The paper size is suitable for China. National Standard (CNS) A4 specification (210X297 mm) ^ — -16- (Please read the precautions on the back before filling this page)

541551 A7 B7 V. Description of the invention (^ (Please read the precautions on the back before filling this page), then the upper movable contact 5 and the lower movable contact 4 can be described, and the aforementioned lower movable contact 4 can be simply installed on the aforementioned The housing portion 1 a of the housing 1 is also covered with the aforementioned adhesive sheet 6 between the outer periphery of the lower movable contact 4 and the housing 1 so that it can follow the reaction of the lower movable contact 4. The turning operation reduces the intrusion of dust and improves the contact reliability. Also, "if it is based on the above structure, it is extended on the upper movable contact 5" and the reversible bulging portion 5 is extended in the cross direction one after another. A plurality of the aforementioned wrist portions 5 b are provided, and the four corner portions on the diagonal line of the housing 1 are formed to receive the respective wrist portions 5 b connected to the receiving portion 1 a and flexibly extending to accommodate the upper movable contact 5. The recessed portion 1 c is provided with the second peripheral fixed contact 2 c that is in constant contact with at least one of the wrist portions 5 b on the receiving recessed portion 1 c. Therefore, the wrist portion 5 b can ensure the upper movable contact. 5 action stroke, and profit Placing the wrists 5 b on the four corners of the casing 1 can reduce the outer shape of the rectangular shape of the casing compared with the case of using a graphic dome-shaped movable contact. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In the foregoing embodiment, the structure of the push switch in which the contact portion is a double-acting two-stage structure will be described. However, the present invention can of course be applied to the movable contact only the upper movable contact 5 described above, and One-stage pushbutton switch without lower movable contact 4. [Inventive Effect] As described above, the pushbutton switch of the present invention includes: a housing having a housing portion; and the center fixed on the inner bottom surface of the housing portion of the housing- 17- This paper size applies Chinese National Standard (CNS) A · 4 specifications (210 × 297 mm) 541551 A7 B7 V. Description of the invention (^ (Please read the precautions on the back before filling this page) The peripheral fixed contact outside the central fixed contact; and the center of the bulging portion is arranged opposite to the central fixed contact, and the peripheral portion is always in contact with the peripheral fixed contact A top-shaped movable contact; on the movable contact, a plurality of wrists are extended in the cross direction successively with the reversed bulging part, and the four corners of the diagonal of the shell are connected to the storage part, and Receiving recesses that flexibly accommodate each wrist of the movable contact. At this receiving recess, at least one peripheral fixed contact that is in constant contact with the wrist is provided. Therefore, the wrist can be used to ensure the upper movable contact. The movement stroke can also be achieved by arranging the wrists on the four corners of the housing. Compared with the case of using a circular dome-shaped movable contact, the outer shape of the rectangular housing can be reduced, and the size can be reduced. It is printed by the Ministry of Intellectual Property Bureau's Consumer Cooperative because it includes: a housing with a housing; a central fixed contact disposed on the inner bottom surface of the housing of the housing; a first perimeter disposed outside the central fixed contact A fixed contact; a second peripheral fixed contact disposed further outside the first peripheral fixed contact; the center of its bulging portion is opposite to the aforementioned central fixed contact, and the peripheral portion is always fixed to the first peripheral The dome-shaped lower movable contact that the contact contacts; and a larger diameter than the shape of the lower movable contact, a bulging portion is arranged to cover the lower movable contact, and the peripheral portion is fixed to the second peripheral contact. The dome-shaped upper movable contact that is always in contact; On the upper movable contact, a plurality of wrists are extended in the cross direction successively with the reversible bulge; on the four corners of the diagonal of the shell, A receiving recess is formed. The receiving recess is connected to the receiving portion and is used to flexibly receive the upper movable contacts. The receiving recess is provided with a second peripheral fixed contact with at least one of the aforementioned wrists. Therefore, the paper size of the wristband can be used to comply with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -18- 541551 A7 B7 V. Description of the invention (the part can ensure the upper stroke of the movable contact, In addition, by disposing the wrists on the four corners of the housing, the outer shape of the square-shaped housing can be reduced compared to the case of using a circular dome-shaped movable contact, even when the switch is a two-stage two-stage structure. When the case can also be made more compact. In addition, the lower movable contact is formed in a substantially circular dome shape and has a smaller diameter than the outer diameter of the wrist portion extending the upper movable contact. Therefore, there is no interference with the upper movable contact. In the case of the case, it is arranged on the casing, and because it does not require positioning in the rotation direction, it can be easily installed. The housing recessed portion has a front wall portion facing the front end portion of the wrist portion, and The side wall portions facing each other form a front wall portion and a side wall portion, so that the gap formed by the side wall portion and the side portion of the wrist portion is narrower than the gap formed by the front wall portion and the front end portion of the wrist portion. , The gap between the front wall portion of the accommodating recessed portion and the front end portion of the wrist can be set to be wide, and the front end portion of the wrist portion is not abutted against the upper wall portion when the pressing operation of the upper movable contact is performed. Therefore, it will not affect the sense of movement during reversal, and can perform high-precision positioning. Also, since the wrist portion is formed with a narrow inclined surface from the base portion to the front end portion of the side portion, the side wall portion of the accommodating recessed portion is formed by imitating the inclined portion of the inclined surface and the parallel portion extending toward the front wall portion, Therefore, the reduction between the wrist and the receiving recess caused by the movement of the upper movable contact can be reduced, thereby preventing contact failure caused by the influence of cutting dust and the like, and improving contact reliability. In addition, because the peripheral fixed contact or the second peripheral fixed contact is arranged on this paper standard, the Chinese National Standard (CNS) A4 specification (210X 297 mm) is applied.

(Please read the precautions on the back before filling this page. J-Order Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-19- 541551 A7 _____B7__ V. Description of the invention (& (Please read the precautions on the back before completing this page ) Inside a pair of receiving recesses on the diagonal of the shell, and the bottom surface of the other pair of receiving recesses crossing it forms a lower contact surface with the wrists than the peripheral fixed contact or the second peripheral fixed contact, The second peripheral fixed contact can be reliably contacted with the wrist, and the other wrist can be prevented from abutting the bottom surface of the receiving recess to cause unstable contact. [Simplified description of the drawing] Fig. 1 shows an implementation of the present invention. A plan view of an example push button switch. Fig. 2 is a longitudinal sectional view showing the same push button switch of the present invention. Fig. 3 is a plan view showing a state in which a housing of the present invention and an upper movable contact are fitted. Fig. 4 is a view showing the present invention. A plan view of the housing and the lower movable contact in a fixed state. FIG. 5 is a plan view showing the housing of the present invention. FIG. 6 is a plan view showing the upper movable contact of the present invention. FIG. A plan view of the lower movable contact shown in the figure. Figure 8 is a plan view showing the adhesive sheet of the present invention. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 9 is an operation explanatory diagram showing the state of the push button switch of the present invention when it is not operated. Fig. 10 is an operation explanatory diagram showing a state when the first stage of the push-button switch of the present invention is on. Fig. 11 is an operational diagram showing a state when the second stage of the push-button switch of the present invention is on. Fig. 12 is Shows the plan view of the conventional push button switch. -20- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 541551 A7 B7 V. Description of the invention (Figure 13 is a vertical sectional view showing the conventional push button switch. (Please read the precautions on the back before filling in this page) [Illustration of the drawing number] 1… case la ··· storage section lb ··· base 1 c ... storage recess

Id ... inclined part 1 e ... parallel part

If ... groove part 2 a ... central fixed contact 2 b ... first peripheral fixed contact 2 c ... second peripheral fixed contact 3 a, 3 b, 3 c ... connecting terminal 4 ... lower movable contact 4a ··· Bulge 5 ... Printed on the upper movable contact 5 of the Intellectual Property Bureau of the Ministry of Economic Affairs and Industrial Cooperatives 5a · · · Bulge 5 b · Wrist 5 c · Inclined 6 ... Glue sheet 6 a · • * Through hole 6 b · Shape 7 ... Cover sheet -21-This paper size is applicable to Chinese National Standard (CNS) A4 (210 ×) 97 mm) 541551

7 B Ming Ming Rfa) 9 if

G

Shelf top 2 Frame key G gap (please read the precautions on the back before filling this page) Printed on the paper by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper applies the Chinese National Standard (CNS) A4 specification (210X 297 mm)- twenty two-

Claims (1)

541551 A8 B8 C8 D8 ^ 、 Patent application scope 1 1. A push button switch is characterized by: This push button switch includes: a housing with a storage section; and (Please read the precautions on the back before filling this page) A central fixed contact on the inner bottom surface of the housing portion of the outer shell; a peripheral fixed contact disposed outside the central fixed contact; and a center of the bulging portion thereof opposite to the aforementioned central fixed contact, and the peripheral portion being A dome-shaped movable contact that is in constant contact with the peripheral fixed contact. On the movable contact, a plurality of wrists are extended in the cross direction in succession with the reversible bulge. On the four corners on the corner line, a receiving recess is formed. The receiving recess is connected to the receiving part and is used to flexibly receive the wrists of the movable contact. At least one of the receiving recesses is provided with the receiving recess. The peripheral fixed contact point that the wrist part is constantly in contact with. 2 · —A push-button switch, characterized in that the switch includes: a housing with a storage portion; a central fixed contact printed on the inner bottom surface of the storage portion of the housing portion printed with the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs; and The first peripheral fixed contact provided outside the central fixed contact; the second peripheral fixed contact provided further outside the first peripheral fixed contact; and the center of its bulging part is opposite to the central fixed contact described above Ground, and the peripheral part is a dome-shaped lower movable contact which is always in contact with the first peripheral fixed contact; and a larger diameter than the lower movable contact is provided with a bulging part facing each other to cover The lower movable contact mentioned above, and the dome-shaped upper movable contact that the peripheral part is in constant contact with the second peripheral fixed contact, -23- This paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) 541551 A8 B8 C8 D8 6. Scope of patent application 2 On the aforementioned upper movable contact, a plurality of wrists are extended in the cross direction successively with the reversible bulge, (please read the back first Please fill in this page again on the four corners of the diagonal of the case, forming a receiving recess, which is connected to the receiving part, and is used to flexibly store the wrists of the upper movable contact. The receiving recess is provided with the second peripheral fixed contact that is in constant contact with at least one of the wrists. 3. The push button switch according to item 2 of the scope of patent application, wherein the lower movable contact has a substantially circular dome-shaped outer diameter and is formed to have a smaller outer diameter than a wrist portion extending the upper movable contact. diameter. 4. The push button switch according to item 1 or 2 of the patent application scope, wherein the housing recessed portion of the housing has a front wall portion facing the front end portion of the wrist portion, and a side wall portion facing the both side portions of the wrist portion. The front wall portion and the side wall portion are formed so that the gap formed by the side wall portion and the side portion of the wrist portion is narrower than the gap formed by the front wall portion and the front end portion of the wrist portion. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. As for the push-button switch of item 4 of the scope of patent application, the wrist part is formed by a narrow inclined surface of the side part from the base end part to the front end part. The inclined portion of the inclined surface and the parallel portion extending toward the front wall portion form a side wall portion of the receiving recessed portion. 6. The push-button switch according to item 1 or 2 of the patent application scope, wherein the peripheral fixed contact or the second peripheral fixed contact is arranged in a pair of the receiving recesses on the diagonal of the housing so that The bottom surfaces of the other pair of receiving recessed portions that cross each other form lower contact surfaces with the wrist portions than the peripheral fixed contacts or the second peripheral fixed contacts. -24- This paper size applies to China National Standard (CNS) A4 (210X297 mm)