TW563145B - Push button switch - Google Patents

Abstract

The subject of the present invention is to provide a push button switch structure capable of reducing the number of components, facilitating assembly, and preventing the wear of a moving contact so as to enhance contact reliability. The invention includes the followings: a stem 5, which is disposed in a housing part 1a of a housing 1 for pushing the moving contact 4 so as to be capable of moving up and down to the fixed contacts 2a, 2b; and a cover 6 cap, which is mounted on the top surface of the housing 1 so as to cover the housing part 1a. A long operation lever 6b is integrally formed at one end of the cover 5 by extending and folding back a part of the cover 6 on the top surface side of the stem 5. Further, a stem pushing part 6c for pushing the stem 5 by coming in contact with the top surface of a pushing projection part 5a of the stem 5 and an elastically deformable elastic arm 6d extending from the stem pushing part 6c are formed in the operation lever 6b.

Description

563145 ⑴ Di 'description of the invention (the description of the invention should state: ―the technical field to which the invention belongs, the prior art, the content, the embodiments, and the drawings are simple explanations】 [Technical Field of the Invention] The present invention relates to a push button switch, which is Press to separate the contact between the movable contact and the fixed contact, especially related to the structure of the push-button switch that must be pressed in two stages when pressing operation such as the input of information such as a mouse. [Prior Art] The structure of a conventional push button switch is shown in FIG. 5 and FIG. 6. Fig. 5 is a longitudinal sectional view of a button switch, and Fig. 6 is a partial sectional view showing a relationship between a movable contact and a coil spring. In the past, the button opening relationship includes: a box 21, which has a storage portion; a central fixed contact 22a and a peripheral fixed contact 22b, which are arranged in the storage portion of the box 21; and a movable contact 2 4, which is oppositely arranged on the central fixed contact 22a and peripheral fixed contacts 22b; a coil spring 25, which is arranged on the movable contact 24; a bottom bracket 26, which passes through the coil spring 25 'Pressing the aforementioned movable contact 24 and inverting it; protective cover 27, which is installed above the aforementioned box 21; and dust-proof sheet 28, which is interposed between the protective cover 27 and the aforementioned box Among the 21. The box 21 is formed of an insulating material such as a synthetic resin, and is formed in a box shape with an open top surface, and has a storage portion 2 1 a inside. A central fixed contact 2 2 a made of a conductive metal material is arranged at the center of the storage portion 2 1 a on the inner bottom surface and exposed from the surface, and is opposite to the central fixed contact 22 a. Position, peripheral fixed contacts 2 2b made of metal materials with the same conductivity are provided. In addition, the peripheral portion of the movable contact 24 and the peripheral fixed contact 563145 (2) 22b are in a conductive state. In addition, a pair of fixed terminals 23a, 23b protruding from the side wall in the outward direction is provided in the above-mentioned box 2 1 ′, and the fixed terminals 23a and 231 are buried in the above-mentioned box 21. Although not shown, they are connected to the central fixed contact point. 22a and the peripheral fixed contacts 22b are in a conductive state, respectively. The pair of the fixed terminals 23a and 23b are bent downward along the side wall of the box 21 to form a solder adhesion terminal. When the central shaft 26 is pressed, the movable contact 24 is pressed and reversed through the coil spring 25, and contacts the central fixed contact 22a, and the central fixed contact 22a and the peripheral fixed contact 22b pass through the movable contact. 24 is connected, and a pair of the aforementioned fixed terminals 23a and 23b become conductive. At this time, when the middle shaft 26 is continuously pressed after the movable contact 24 is reversed, the coil spring 25 will become compressed, and the movable contact 24 and the central fixed contact 22a and the peripheral fixed contact 22b may be compressed. In the conductive state, press the above-mentioned center shaft 26. In this way, by the compression of the coil spring 25, two stages of pressing of the movable contact 24 after the rotation (after the contact is opened) can be obtained. [Problem to be Solved by the Invention] However, in the above-mentioned conventional push button switch structure, the aforementioned spiral spring meal 25 is housed inside the aforementioned central shaft 26, and the aforementioned coil spring 25 'is disposed on the movable contact 24 and protected by the aforementioned The cover 27 has a structure for preventing the above-mentioned central shaft from springing up, so it has a large number of parts and complicated assembly. In this case, the movable contact 24 is in contact with the coiled end of the coil spring 25, so the spleen is damaged due to friction loss, and the movable contact 24 will be broken and damaged 563145

(3) Problems. _ The purpose of the present invention is to provide a structure of a push button switch, which is to solve the above-mentioned problems, reduce the number of parts, facilitate assembly, and prevent friction loss of the movable contact and improve contact reliability. [Problem Solving Means] The first means of the present invention for solving the above-mentioned problems is characterized in that it includes: a cabinet having a storage portion; a fixed contact arranged on the inner bottom surface of the storage portion; movable The contact is made of an elastically deformable spring piece and is separated from the fixed contact; the bottom bracket is provided in the box so as to be able to be raised and lowered, and the movable contact is brought into contact with the fixed contact. Those who press in the direction; and a protective cover, which is installed on the box to cover the storage portion; wherein one part of the protective cover is extended and a part of the protective cover is extended on the top side of the bottom bracket. In this way, a long-shaped operating lever is integrally formed, and is formed on the operating lever: a central axis pressing part, which is in contact with the top surface of the aforementioned central axis; and an elastic wrist part, which is further extended by the central axis pressing part Out. As a second means, the operation lever is formed to be elastically deformable, and at the same time, the movable contact is sandwiched between the bottom bracket and the inner bottom surface of the box by the elastic force of the operation lever, and fixed to the foregoing. The contact side is elastically pressed. As a third means, the movable contact is formed by a metal spring having a dome-shaped bulging portion, and a protruding portion is formed below the bottom bracket, which presses the top of the bulging portion of the movable contact, and The aforementioned bottom bracket pressing portion of the above-mentioned operation lever is arranged corresponding to the aforementioned protrusion below the bottom bracket 563145

(4) on the same axis. As a fourth means, wherein the above-mentioned bottom bracket pressing portion presses the bottom surface of the bottom bracket when the operation lever is rotated, and the elastic wrist portion uses the bottom bracket pressing portion as a fulcrum to elastically deform in the rotation direction. As a fifth means, an arc-shaped operation portion is formed on the free end side of the elastic wrist portion. [Embodiment of the invention] The following embodiments of the push button switch of the present invention are shown in FIGS. 1 to 4. Fig. 1 is a plan view of a push button switch, Fig. 2 is the same front view, Fig. 3 is the same side view, and Fig. 4 is a longitudinal sectional view showing the operating state of the operating lever. In the figure, the box body 1 is formed of an insulating material such as a synthetic resin, and has a box-shaped receiving portion 1 a inside and a box shape opened at the top. A central fixed contact 2 a made of a conductive metal terminal material is arranged at the center of the inner bottom surface of the storage portion la of the case 1, and is arranged in a state protruding from the terminal material and exposing the upper side, and sandwiched therebetween. Opposite positions of the central fixed contact point 2a are peripheral fixed contact points 2b and 2b made of the same conductive metal terminal material, and are arranged in a state protruding from the terminal material and exposing the upper side. In addition, at the center of the bottom surface side of the case 1, fixed terminals 3a, 3b protruding outward are formed. The fixed terminals 3a and 3b are connected in the box 1 and connected by the terminal material and the central fixed contact 2a and the peripheral fixed contacts 2b in a conducting state, and the connecting portion is bent in the box 1. And buried in the bottom of the box 1. In addition, the fixed terminals 3a and 3b protrude outward from the center of the bottom surface portion of the box 1, and the protruding base portion is along the central side wall of the box 563145 (5)

t »» E is formed by bending to the bottom surface side, and becomes a connection terminal that is attached to the conductive pattern by solder. The conductive pattern is arranged on a circuit board on which a button switch is mounted, which is not shown. On the upper surface side of the case 1, fixed projections 1b formed by projections are formed in the four sacral portions. A fixing hole 6g of a protection cover 6 described later is fixed to the fixing protrusion lb, so that the protection cover 6 can be mounted on the upper side of the box 1 described above.

The movable contact 4 is formed of a conductive metal plate in a substantially disc shape, and a dome-shaped bulged portion 4a is formed at the center. The top and bottom surfaces of the bulged portion 4a are the central contact portions. The peripheral portion of the movable contact 4 is placed on the peripheral fixed contacts 2b, 2b arranged on the inner bottom surface of the case 1, and is connected to the peripheral fixed contacts 2b, 2b, and the central contact The department is arranged opposite to the central fixed contact 2a. The movable contact 4 is reversed by pressing the central dome-shaped bulging portion 4a through a middle shaft 5 described later, so that the central contact portion is connected to the central fixed contact 2a.

The bottom bracket 5 is formed of an insulating material such as a synthetic resin. A pressing protrusion 5 a is provided on the central shaft 5, and is pressed by an operator protruding outward from the storage portion 1 a of the box 1; and a protrusion 5 b is formed on the lower side of the pressing protrusion 5 a. It is a person protruding downward, contacting the upper part of the bulging part 4 a of the movable contact 4, and pressing the movable contact 4 downward. In addition, a yoke portion 5c is formed on the outer peripheral portion of the pressing protrusion 5a, which is a person who contacts the inner surface of the protective cover 6 described later during the pressing operation of the bottom shaft 5. When the bottom bracket 5 is pressed, when the bottom bracket 5 is restored, the vehicle portion 5 c is fixed to the inner surface of the protective cover 6 described later, and the inner surface is fixed to -10- 563145.

One of the four sides of the box 1 prevents the center shaft 5 from flying out. The protective cover 6 is formed of a plate material such as a metal plate having elasticity, which is integrally provided: a base plate portion 6a formed in a slightly square flat wheat shape; and an operating lever 6b attached to one end of the base plate portion 6a. A part of the protective cover 6 is extended and formed, and its free end is folded back in a slightly U shape above the pressing protrusion 5 & of the above-mentioned central shaft 5, thereby being a long ruler that can be elastically deformed. In addition, it is formed on the aforementioned operating lever 6b: a bottom bracket pressing portion 6c, which is in contact with the top surface of the above-mentioned pressing protrusion 5a of the bottom bracket 5, and projects downward; and an elastic wrist portion 6d, which is further formed by the bottom bracket pressing portion 6c Extend and deform elastically. An arc-shaped operation portion 6e is provided at the free end of the aforementioned elastic wrist portion 6d, and the operation portion 6e is a push-in operator engaged with a drive member of an electronic device on which a button switch is installed. Month 1J describes the center axis press> 1 ~ Which time Shao 4 Zhuang Shang 'then presses the movable contact 4 downward, and is formed at a suitable position of the aforementioned operating lever, which is along the same line corresponding to the number of protrusions of the aforementioned axis 5 By. HA, because the pressing force of the aforementioned operating lever 6b will be transmitted from the aforementioned = neodymium pressing portion 6c to the aforementioned protrusion below the bottom axis 5 without any leakage: 讣 ', so the protruding portion of the movable contact 4 can be surely pressed and operated " σ | ^ ο 6b: The operating lever 6b is elastically deformable. With the elastic force of the aforementioned weight loss, 'the top surface of the pressing protrusion of the aforementioned central shaft 5 can be installed under the state of pressure under 4' On the upper side of the box 1. Qin inside ... moving contact 4 is located between the bottom axis 5 and the inner bottom surface of the case i, between the aforementioned central fixed contact ~ and the peripheral fixed contact 2 ^ 0 ^ 145 ⑺

The side system is elastically pressurized 4 to perform pre-pressing and indeed perform the switch. Therefore, it can be contact-stabilized at the aforementioned movable contact that can be elastically deformed, and it can be operated at the desired switching position.作 r 疋 疋 When working, with the aforementioned glaze ... — The talented woman presses the Tf of the aforementioned axis 5 & ^ ^ 贝 面 ', then the elastic wrist 6d is pressed with the aforementioned axis.

The pressing part 6 c serves as a fulcrum, and% A ^ ”is formed elastically deformable in the direction of motion. In addition, the free end of the above-mentioned elastic arm ^ 6 d is provided with the arc-shaped operation part 6 e. The operation cup 6b is engaged with the driving part D of the electronic device on which the button switch is installed and pressed into the grip of your master's operation 'even once the switch is on, it can be further continued in the open state # & ^ / 、' M. Ge Zhi: When the operation is performed, the second slave pressing operation can be surely performed. When the operation lever 6b is pressed into operation by the driving component D, the aforementioned operation along the arc shape (6e; i) moves, and the operation pressing starts from At the end, the driving part D of the electronic device can be surely touched and pushed in. The base plate portion 6 & of the protective cover 6 is provided with an insertion hole 6f protruding from the center of the pressing protrusion 5a of the bottom bracket 5 and The base plate portion is formed with a fixing hole 6 g formed by four ridge portions, and is connected to the fixing protrusion ib formed on the upper surface side of the cabinet 1. The fixing protrusion lb of the cabinet i is engaged with the fixing hole 6 g. 'And fix it with a punch, etc., so that the above-mentioned bottom shaft pressing portion 6 c The protective cover 6 is fixed to the upper side of the case 1 in a state in which the protrusions 5 b and the protrusions 5 b of the bottom shaft 5 are aligned on the same axis. Next, the operation of the push-button switch configured as described above will be described. In the initial state (in the position shown by L1 in FIG. 4) of the aforementioned operating lever 6b in the non-pressing operation, with the -12- 563145 弹 elasticity possessed by the aforementioned operating lever Shan, the vertical feeling of the aforementioned central axis 5 * The top surface of 5a of most of the technical countermeasures will become a downward pressure state (as shown in Figure 4 φ M1 #-, M1 in the mouth), so in the aforementioned movable contact 4 becomes a pre-press The shape energy a is centered, and the peripheral edge portion of the movable contact 4 is above the peripheral fixed contacts 2b, 2b and above the total contact I. At this time, the round bulged portion 4a and the towel center are in contact. The mouth contact 2 a is in a separated state, and the open relationship is in a closed state. From this state, when the operation part of the operation lever 6b is pressed and operated by the driving part D such as an electronic device, it moves to the bucket to start The position shown 'then the bottom shaft pressing portion 6c will be the pressing protrusion 5 & press to the position shown by M2 in FIG. 4, the protrusion 5 b provided below the pressing protrusion of the central axis $, and press the upper part of the core of the bulging portion of the movable contact 4 above the bulging portion 4 a Press down. At this time, the bulging portion 4a of the movable contact 4 is pushed downward, and in the movable contact 4, the bulging portion 4a is reversed downward. Therefore, the top and bottom of the bulged portion 4a are in contact with the central fixed contact 2a, the peripheral fixed contacts 2b, 2b and the central fixed contact 2a are conducted through the movable contact 4, and the switch is turned on. In this state, when the operation portion 6 e of the operation lever 6 b is further pressed by the driving member D such as an electronic device, the elastic wrist portion 6 d of the operation lever 6 b rotates the center axis pressing portion 6 c as a fulcrum. Elastic deformation in the direction (at the position shown by L 3 in Fig. 4). At this time, an arc-shaped operation portion 6e is provided at the free end of the elastic wrist portion 6d, and the drive member D is along the arc surface of the front operation portion 6e, and the operation pressing can be reliably performed from the beginning to the end. -13- (9) (9) 563145

Shi U d 'is elastically deformed in the rotation direction by the elastic wrist portion 6d of the operation lever 6b and the above-mentioned central axis pressing portion 6 C 4 jku At toi ", and the support 2 even after the switch becomes $, it can be maintained In the open state (at the position shown by M2 in Fig. 4), following the further pressing operation, a two-stage pressing operation can be surely performed. When the pressure from the operation lever 6b is released from the ^ -like evil down, the foregoing operation is performed. The cup b returns to its initial state due to its elasticity, and the bulging portion 4a of the movable contact is reversed due to its own elasticity, and returns to the initial state, and the bottom axis 5 is applied by the pressure at this time. Pressed upward to return to the initial position. At this time, as the bulging part 4a is reversed, the top and bottom of the bulging part 4a will be separated by the central fixed contact 2a, and the switch will be turned off. According to the above structure, At one end of the protective cover 6, a part of the protective cover 6 is extended and folded back on the top surface side of the bottom bracket 5, thereby forming the long operating lever 6 b as a whole and forming the operating lever 讣. : The aforementioned bottom bracket press The portion 6c is in contact with the top surface of the pressing protrusion 5a of the bottom bracket 5 and presses the bottom bracket 5 into the operator; and the elastic wrist portion 6d is further extended from the bottom bracket pressing portion 6c and can be Those who are elastically deformed, the protective cover 6 and the operating lever 6b are integrally formed, which can reduce the number of parts and facilitate assembly. It is not the same as the previous structure that the top of the movable contact 4 is a coil spring, etc. The structure of direct pressing is formed through the above-mentioned bottom shaft 5 and is pressed by the above-mentioned bottom shaft 5 with the above-mentioned operation lever 6 b. Therefore, the above-mentioned movable contact 4 has no friction loss' and the above-mentioned protective cover 6 is used for The structure of the storage portion ia with the cover closed, so that the invasion of dust and the like can be suppressed, and the reliability of contact -14-563145 (ίο) can be improved. [Effects of the invention] The button-open relationship of the ancient brother I invention includes: Box, its receiving part; fixed contact, which is a J-moving contact that is arranged on the inner bottom surface of the receiving part. The pot is selected by i point contact with the separator, the center axis / deformed elastic sheet, and fixed connection 、 / 、 It can be installed in the box Press the movable contact in the direction of “fixed contact”, and the protective cover, which is a woman's clothing on the top of the box, with frost. ^ Only eight you receive the storage department; One of the covers 螭 'extends a part of the protective cover with a long body-shaped operating lever :: The top side of the shaft is folded back to cover the cup, and because the operating lever is formed: the central axis is pressed fort The pressing part further extends the wrist part, which can reduce the number of parts, and is easy to perform. No friction ^ Consumption two, because the opening of the box is closed by the shaft of the center shaft, it can suppress Ebe, and to protect reliability. Ye Zhizhi, the lifting contact operating rod system can be elastically deformed. Force: The movable contact is centered on the center axis and the inner side of the box. Elastic change-between 'and in solid massage' can be contact stability, and pre-movable contacts are cut at the desired movable contact is made of gold with a dome-shaped bulge: set open and close. The lower part of the middle draw is formed by forming the bulging part of the movable contact ρ which is elastic. Then, the protrusion of the lever ^ on the operation lever ^ and the shaft pressing part are arranged on the same-axis, Therefore, the pressing of the operating lever: the force of the protruding part below will be transmitted to the protruding part below the bottom of the bottom shaft without loss, -15- 563145 00, the transmission is no leakage, so it can be sure to press the bulging top of the movable contact . The operating lever system presses the top surface of the bottom bracket during the rotation operation. The elastic wrist part elastically deforms in the rotation direction with the bottom bracket pressing portion as a fulcrum. Therefore, with a simple structure, the second stage of pressing after the switch is turned on can be surely obtained. .

In addition, since the arc-shaped operation portion is formed on the free end side of the elastic wrist portion, when the operation lever is pressed into the operation part by the driving part, the operation pressing is performed from the beginning to the end because the operation part is rotated along the arc-shaped operation part. It can be touched and pushed in firmly. [Brief description of the drawings] FIG. 1 is a plan view showing a push button switch according to an embodiment of the present invention. Fig. 2 is a front view showing the same push button switch of the present invention. Fig. 3 is a side view showing the same push button switch of the present invention. Fig. 4 is a longitudinal sectional view showing an operating state of a lever of a push button switch of the present invention.

Fig. 5 is a longitudinal sectional view showing a conventional push button switch. Fig. 6 is a partial cross-sectional view showing a relationship between a movable contact and a coil spring of a conventional push button switch. [Illustration of representative symbols in the figure] 1 box la storage portion lb fixed projection 2a central fixed contact 2b peripheral fixed contact -16- 563145 (12) I difficulty 3 a fixed terminal 3b fixed terminal 4 movable contact 4 a Bulge portion 5 Bottom shaft 5a Pressing protrusion 5b Protrusion 5c Yoke portion 6 Protective cover 6 a Base plate portion 6b Operating lever 6 c Bottom shaft pressing portion 6 d Elastic wrist portion 6 e Operating portion 6f Insertion hole 6g Fixing hole

-17-

Claims (1)

563145 Patent application scope 1. A push button switch, which is characterized by containing a box body with a storage section; a fixed contact with a bottom surface of the storage section; a movable contact with a It is made of an elastically deformable spring piece that separates from the fixed contact; the bottom bracket is a lifter that is installed in the box and presses the movable contact in the direction of contact with the fixed contact; And a protective cover, which is installed on the box to cover the storage portion; wherein at one end of the protective cover, a part of the protective cover is extended and folded back on the top surface side of the bottom bracket, so as to A long-shaped operating lever is integrally formed, and is formed on the operating lever: a bottom bracket pressing part, which contacts the top surface of the bottom bracket; and an elastic wrist part, which is further extended from the bottom bracket pressing part. 2. For the push-button switch of item 1 in the scope of patent application, in which the aforementioned operating lever is elastically deformable, and at the same time, the movable contact is sandwiched between the aforementioned central shaft and the aforementioned box by the elastic force of the aforementioned operating lever. Elastic pressure is applied between the bottom surface and the fixed contact side. 3. For the push-button switch of item 1 or 2 of the scope of patent application, the aforementioned movable contact is formed by a metal spring with a dome-shaped bulging portion, and a protruding portion is formed below the aforementioned central shaft, which presses the aforementioned The top of the bulging part of the movable contact, and the aforementioned central axis pressing part of the aforementioned operating lever is arranged on the same axis corresponding to the aforementioned protruding part below the aforementioned central axis. 4. For example, the push-button switch of item 1 or 2 of the scope of patent application, where When the operation lever is operated with rotation, the bottom shaft pressing portion presses the bottom surface of the bottom shaft 563145 The elastic wrist portion is elastically deformed in the rotation direction by using the central axis pressing portion as a fulcrum. 5. The push button switch according to item 4 of the scope of patent application, wherein an arc-shaped operation portion is formed on the free end side of the aforementioned elastic wrist portion.