TW200423173A - Push switch device - Google Patents

Abstract

To provide a small push switch device capable of restraining the occurrence of contact failure in each contact. This push switch device is equipped with a casing (10) having a housing part (11); a common contact (20) and a switching contact (30) formed in the housing part (11); an operation member (50) for holding a moving contact (40) capable of contacting to and separating from the switching contact (30); and a coil spring (60) for enabling the operation member (50) to be returned to an initial state. Its feature is: One end of the coil spring (60) is always brought into contact with the common contact (20), and the other end thereof is always brought into contact with the moving contact (40) held by the operation member (40), so that the common contact (20) is always electrically connected to the common contact (20) through the coil spring (60).

Description

200423173 〇). Description of the invention [Technical field to which the invention belongs] The present invention relates to a small push button switch device for detecting the opening and closing of a CD player cover and the like, which is used in various electronic devices. [Prior Art] In the past, push button switch devices used in various electronic devices such as opening and closing detection of a lid of a CD player have been described in Patent Document 1, for example. A suitable button switch device is generally housed in a resin frame in which a common contact point and a switching contact point are inserted and molded: an operation member provided with a movable contact having two contact pieces, and an operation member to be pressed in. Coil spring for returning to the original state. In this kind of push button switch device, in the initial state, the contact piece on one side of the movable contact is often in contact with the common contact, but the contact piece on the other side and the switching contact are isolated, and the switch is in the off state. If an external force is applied to the operating member and the operating member is pressed into the frame, the contact piece on the other side of the movable contact is in contact with the switching contact. In this way, the common contact and the switching contact are turned on through the movable contact. The switch is then turned on. If the external force is removed from the operating member, the restoring force of the coil spring is used to return the operating member to the initial state, the movable contact leaves the switching contact, and the switch is turned off. Furthermore, the contact piece of the movable contact is subjected to a bending process at the time of manufacture, and the front end is in contact with the common contact or the switching contact. [Patent Document 1] JP 2 0 1-3 5 2 9 6 (2) (2) 200423173 [Summary of the Invention] However, with the miniaturization of electronic devices in recent years, the push-button switch device also needs to be miniaturized. . However, since the push button switch device having the above-mentioned structure requires two contact pieces, a space of a large part is required in the housing, and it is difficult to achieve miniaturization. In addition, if there are two contact pieces in this way, a problem arises in that the sliding resistance is increased and the problem of poor return of the operating member is easily caused. Furthermore, since the tip of the contact piece slides on one surface in contact with a common contact or a switching contact, contact failure is liable to occur. In addition, the tip of the contact piece comes into contact with the resin portion of the housing during sliding, and the resin portion is ground. Therefore, the chips generated by such grinding may cause poor contact. In addition, such a push button switch device is usually soldered in a reflow soldering apparatus using solder. Here, since the contact piece is held in contact with the common contact or the switching contact 'to press the common contact or the switching contact, the contact piece receives high stress in the initial state of being assembled into the housing. However, if the contact piece becomes a high temperature state during reflow soldering, the contact piece may sag or bend, which may cause contact failure. In addition, in the conventional push button switch device, the coil spring may sometimes buckle and reduce the resetting load, and the coil spring is usually made of metal. Because the coil spring is buckled, sometimes There will be contact between the coil spring and other contacts, causing faulty conduction. The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a push button (3) 200423173 switch device which can be miniaturized and can suppress poor contact at each contact. In order to solve the above problems, the push button switch of the present invention is equipped with a stomach. The frame of the stomach accommodating part, the common contact and the cutting contact provided in the accommodating part, and the movable contact that can be freely separated from the switching contact. The operating member of the contact and the spiral bomb like which can return the operating member to the initial state are characterized by:

One end of the coil spring is often brought into contact with the common contact point, and the other end is often brought into contact with the movable contact point held on the operation member, and the common contact point and the movable contact point are constantly conducted by the coil spring. According to the present invention, there is no need to provide a contact piece for making the common contact point and the movable contact point common, and the push button switch device can be miniaturized.

Furthermore, the present invention is structurally characterized in that the movable contact has a flat plate portion and the switching contact has a pair of clamping contact portions that are formed in a clip shape and face each other, and the movable contact is held by The point operating member is pushed into the housing portion of the frame body, so that the flat plate portion can be inserted into the pair of opposing clamping contact portions to contact each other. Furthermore, the present invention is structurally characterized in that the switching contact has a flat plate portion and the movable contact has a pair of clamping contact portions that are formed in a clip shape and face each other, and the movable contact is held by holding the movable contact. The point operating member is pushed into the housing portion of the frame, so that the opposing pair of clamping contact portions can clamp and contact each other of both surfaces of the flat plate portion. According to the present invention, 'the flat portion is held by the clip-shaped holding contact portion' and slides on both sides, so the contact state between the movable contact and the switching contact is stable (6- (4) 200423173). Furthermore, the present invention is structurally characterized in that a guide wall is provided between the common contact and the switching contact in the housing portion of the housing, and the movement of the coil spring is suppressed. According to the present invention, the coil spring can be guided, the coil spring can be prevented from buckling (seat flexion), and the coil spring can be prevented from contacting the switching contact.

Furthermore, the present invention is structurally characterized in that the operation member is provided with a spring guide for suppressing movement of the coil spring. According to the present invention, the coil spring can be guided, and the coil spring can be prevented from being buckled. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a push button switch device in an embodiment of the present invention; FIG. 2 is an exploded view of a push button switch device in an embodiment of the present invention; FIG. 3 is an initial state diagram of the push button switch device in an embodiment of the present invention Figure 4 is a side sectional view of the push button switch device in a state where the operating member is pressed into the flat plate portion and the clamping contact portion is in contact; FIG. 5 is a side sectional view of the push button switch device in a state where the operating member is pressed into the deepest position In addition, in FIG. 3, A is a front view of the push button switch device according to the embodiment of the present invention, B is a C-C cross-sectional view of A, and FIGS. 4 and 5 are also cross-sectional views at the same position. The push button switch device 1 ′ according to the embodiment of the present invention shown in FIG. 1 is as shown in FIG. 2 (5) (5) 200423173. As shown in FIG. 2, the push button switch device 1 ′ has a substantially square frame 1 〇 A storage section 11 is provided. A pair of guide walls 13 are formed in the storage portion 11 of the frame body 10 so as to oppose each other along the longitudinal direction of the frame body 10, and the height is approximately the same as that of the peripheral wall 12 of the frame body 10. half. The guide wall 13 has a function of preventing buckling of the coil spring 60 described below. Further, a common contact 20 and a switching contact 30, each of which is made of a thin metal sheet with the guide wall 13 interposed therebetween, are provided in the receiving section 11. Further, in the present embodiment, the frame body 10 is formed substantially in a square shape, but there is no particular limitation on the shape, and it can be arbitrarily changed according to the use site in the electronic device and the like. Also, the height of the guide wall 13 is not necessarily about half of the surrounding wall 12; for example, the height may be the same as that of the surrounding wall 12 '. There is no particular limitation on the height. There is no particular limitation on the shape of the guide wall 13 as long as it is both sides of the coil spring 60. As shown in FIG. 2, the common contact 20 has an elongated flat plate-shaped body 2 1 ′ provided in the storage portion 11 such that its longitudinal direction is along the longitudinal direction of the frame body 10. In addition, the peripheral wall 12 of the frame body 10 has a small opening portion 12a at a portion intersecting the common contact point 20, and the small opening portion 12a is continuous from an end portion of the main body 21. A common terminal 22 is formed. This common terminal 22 is often in contact with one end of a coil spring 60 described below. In addition, as shown in FIG. 3, the common contact 20 has an exposed connection terminal 23 from the bottom surface to the side surface of the casing 10, and the connection terminal 23 is soldered to the substrate. In addition, as shown in FIG. 2 and FIG. 3, the switching contact 30 has a slender flat plate-shaped body 3 1 and is provided in the storage section like the common contact 20: [inside i] its longitudinal direction is along the frame 1 〇 Longitudinal direction. The main body 31 is formed as a clamping contact portion 32, which is formed in a clip shape, and a convex portion 32a on the lower surface thereof and a plate-shaped spring piece 3 2b formed by bending are opposed to each other. A flat plate portion 4 4 of the movable contact portion 40 described below is inserted into the holding contact portion 3 2. In addition, the switching contact 30 also has a connection terminal 3 j ′ exposed from the bottom surface of the housing 10 to the side, and the connection terminal 3 3 is soldered to the substrate. The common contact point 20 and the switching contact point 30 are fixed in the storage portion 11 by insert molding. Among them, in this embodiment, the common contact point 20 is formed in a shape of a body 21 having an elongated flat plate shape. However, it is not necessary to limit the common contact point 20 to this shape, and any shape may be used as long as it has a common terminal 22 and is connected to the connection terminal 23 from the common terminal 22 and the connection terminal 23. In addition, the same is true for the switching contact 30, and it does not necessarily have to have the shape of an elongated flat plate body 31, as long as it has the clamping contact portion 3 2, and is connected from the clamping contact portion 3 2 to the connection terminal 3 3 No matter what shape the conductive shape is formed on. In addition, the clamping contact portion 32 may not necessarily be formed into a clip shape by the lower convex portion and the spring piece. For example, two metal flat plates formed in parallel may be pressed and bent inward to form a clip shape. There are no particular restrictions on its structure. Furthermore, as shown in FIG. 2, the peripheral wall 12 of the frame body 10 has a large opening portion 2b on the side opposite to the small opening portion 12a, and the operation member 50 is fitted into the large opening portion 12b. Inside, the operating member 50 is composed of an external operating portion 51, a movable contact mounting portion 52, and a spring guide portion 53. The external operation portion 51 is a large opening portion 12 b having a width substantially equal to that of the surrounding wall 12, and is an external force applying portion for pressing the operation member 50 into the storage portion 11. In addition, (7) (7) 200423173 A movable contact 40 made of a thin metal plate is mounted on the movable contact mounting portion 5 2. The movable contact 4 has a main body 4. The movable terminal 4 at a position opposite to the common terminal 22 of the common contact 20 2. The side joint portion 4 formed on the side from the main body 4 to the switching contact 3 forever 3, and from the side The square joint portion 43 is opposed to the clamping contact portion 32 of the switching contact 30, and forms a flat plate portion 44 substantially parallel to the bottom surface of the frame body 10. The movable contact 40 is fixed by combining the movable terminal 42 and the side joint portion 43 with the terminal junction formed on the movable contact mounting portion $ 2 ′ 5 2 a and the side joint portion 5 2 b respectively. On the operating member 50. The coil spring 60 is arranged on the common contact point 20 so that the ends thereof are constantly in contact with the movable terminal 42 of the movable contact point 40 and the common terminal 22 of the common contact point 20. This coil spring has a function of returning the operation member 50 to the initial state when the operation member 50 is pressed into the storage portion 11. And 'One end is often in contact with the common terminal 22 of the common contact point 20, and the other end is often in contact with the movable terminal 42 of the movable contact point 40. Therefore, the' common contact point 20 and the movable contact point 4 pass through. The coil spring 60 is always on. @ 样 'Conducts the common contact 20 and the movable contact 40 through the coil spring 60, so there is no need for a contact piece for conducting the common contact and the movable contact like the conventional push button switch device. Therefore, the button switch device can be miniaturized. In addition, compared with the case with two contact pieces, the sliding resistance is small, so that the resetting of the operating member 50 is less likely to occur. -10- (8) 200423173 In addition, the guide is provided in the accommodating part 11 provided in the frame 10 13 and the surrounding wall 12 can prevent the coil spring 60 from being buckled in the lateral direction, suppress the loss of the re-setting load of the coil spring 60, and return the operating member 50 to the initial position. In addition, the guide wall 13 is prevented from being buckled in the lateral direction by the coil spring 60, which can prevent the coil spring 60 from contacting the cut contact 30 and cause faulty conduction. At the same time, it also has the effect that It fits into a groove (not shown) provided on the lower surface of the operation member 50 to position the operation member 50 to keep the sliding state stable. Furthermore, the spring guide portion 53 of the operation member 50 is formed in At the position where the movable terminal 42 at the movable point 40 is clamped, the spring guide portion surrounds the upper portion of the coil spring 60 to prevent the coil spring 60 from being buckled in the upward direction. In this way, the coil can be suppressed The loss of a constant load of the spring 60 can accurately return the operating member 50 to the initial position. As described above, the switching contact 30 has a clip-shaped clamping point portion 32, and at the same time, the movable contact 40 has a flat plate portion 4 4 which is inserted into the clamping contact portion 32, that is, the two sides of the flat plate portion 4 4 are slid by sliding the clamping connection portion 32 to The movable point 40 and the switching contact 30 are connected to each other. Compared with the case where a contact piece such as a button-opening device slides on one side, the contact state is fixed. Also, the movable contact 40 does not contact the housing 10, so there is no fear that the movable contact 4 will slide during sliding. The resin part of the frame 1 〇 can be firmly replaced by the wall.) Fixed connection 53 Rotary reset contact point connection must be ground -11-(9) (9) 200423173 It will not be cut due to grinding debris. Causes poor contact. Furthermore, the spring piece 3 2b of the clamping contact portion 32 is hardly subjected to stress in the initial state. Therefore, when the push button switch device 1 is soldered to the substrate by a reflow soldering device, Since the spring piece 32b of the contact point portion 32 does not collapse even when exposed to high temperatures, the contact state is stable. In addition, as shown in Fig. 2, a resin cover member 70 is formed on the upper surface of such a housing 10 to cover the storage portion 11. The cover member 70 prevents dust and the like from entering the storage portion i! And prevents the coil spring 60 from being buckled upward. However, instead of a structure in which a cover member is separately installed, a structure in which the cover member and the frame body 10 are integrally formed may be used. In this case, the side surface of the peripheral wall 12 having the large opening portion 1 2 b is formed into a full opening shape, and the coil spring 60 and the operating member 50 are incorporated therein. In addition, a support member for supporting the operation member 50 is required. The operation of the push button switch device 1 will be described below. In the initial state (Figure 3), the coil spring 60 constantly contacts one end with the common terminal 22 of the common contact point 20 and the other end often contacts the movable terminal 42 of the movable contact point 40, so that both Conducted and arranged on the common contact point 20 with a few contractions, and using the restoring force to press the operating member 50 to the surrounding large wall 1 2 of the large opening 邰 1 2 b of the frame 10 . In this initial state, the clamping contact portion 32 of the contact 30 is switched, and the flat portion 44 of the movable contact 40 mounted on the movable contact mounting portion 52 of the operation member 50 is in an isolated state. Therefore, the common contact 20 and the switching contact 30 are not turned on, and the switch is in an off state. In addition, the clamping contact portion -12- (10) (10) 200423173 3 2 of the switching contact 30 is in a state of overlapping with each other. When an external force is applied to the external operation portion 51 of the operation member 50 and the operation member 50 is pressed into the storage portion n of the housing 10, the spiral spring 60 is contracted in proportion to the external force. If the operation member 50 is directly pressed in this way, the flat contact portion 4 of the movable contact 40 provided on the movable contact mounting portion 52 of the operation member 50 and the clamping contact portion 3 2 of the switching contact 30 Phase contact (Figure 4). In this way, the switching contact 30 and the movable contact 40 are made conductive, and furthermore, the common contact 20 and the movable contact 40 are often conducted by the coil spring 60, so that the common contact 20 is switched to the switching contact. 3 0 is turned on and the switch is on. If the operating member 50 is further pushed in by this, the flat portion 44 of the movable contact 40 is also pushed into the clamping contact portion 3 2 of the switching contact 30, and the flat portion 44 pushes the spring piece upward. 32b. The spring piece 32b returns to its original state by its restoring force, and presses the flat plate portion 44 downward. In this way, the flat plate portion 44 is held between the lower convex portion 3 2 a and the spring piece 3 2 b, so that the contact state is stable (Fig. 5). If the external force is eliminated from the operation member 50, the coil spring 60 uses the restoring force to push the operation member 50 back to its original state. In this way, the clamping contact portion 32 of the contact 30 and the flat plate portion 44 of the movable contact 40 are returned to the isolated state again (Fig. 3), and the switch is turned off. The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the matters described in the above embodiment, but can be changed and improved according to the technical solution. Examples of changes are shown below. Moreover, in FIGS. 6 to 8 at -13- (11) (11) 200423173, A is a front view of the push button switch device, and B is a C-C cross-sectional view of A. For example, in the above embodiment, 'a clip-shaped holding contact portion 32 is provided on the switching contact 30 side, and a flat portion 44 is provided on the movable contact 40. However, it is not limited to this. As shown in FIG. 6, a flat plate portion 34 may be provided on the switching contact 30 side, and a clip-shaped holding contact portion 45 may be provided on the movable contact 40 side. Further, in the above embodiment, as shown in FIG. 3, the flat plate portion 44 of the movable contact 40 is formed in a state substantially parallel to the bottom surface of the frame body 10. However, the present invention is not limited to this. For example, as shown in FIG. 7, the flat plate portion 44 may be formed to be substantially perpendicular to the bottom surface of the frame body 10. Alternatively, as shown in FIG. 8, the two are combined to form a clip-shaped clamping contact portion 45 on the movable contact 40 side so as to be substantially perpendicular to the bottom surface of the frame body 10; On the point 30 side, the flat plate portion 34 is formed in a state substantially perpendicular to the bottom surface of the frame body 10. [Effects of the Invention] According to the present invention, one end of the coil spring is often brought into contact with the common contact point, and the other end is constantly brought into contact with the movable contact point held by the operating member, so that the common contact point and the movable contact point are contacted. The points are always conductive with each other through the coil spring, so there is no need to provide a contact piece for making the common contact point and the movable contact point common, and the push button switch device can be miniaturized. In addition, compared with the case where there are two contact pieces, the sliding resistance is small, and the operating member is less prone to reset failure. -14- (12) (12) 200423173 In addition, according to the present invention, the movable contact has a flat plate portion, and at the same time, the switching contact has a pair of clamping contact portions formed in a clip shape and facing each other. The operating member of the contact is pressed into the housing portion of the frame, so that the flat plate portion can be inserted into the opposing pair of clamping contact portions to contact each other, or the contact point has a flat plate portion, and the movable contact point is formed. A pair of clip-shaped and opposing clamping contact portions can press the operating member holding the movable contact into the housing portion of the housing, so that the opposing pair of clamping contact portions can be opposed to the flat portion. The two sides are clamped and contact each other. Therefore, the two sides of the flat plate portion held by the clip-shaped clamping contact portion slide, and the contact state of the movable contact and the switching contact is stable. Furthermore, according to the present invention, since a guide wall for suppressing the movement of the coil spring is provided between the common contact provided in the housing portion of the housing and the switching contact, the coil spring can be guided. , Can prevent the coil spring from buckling, and can prevent the coil spring from contacting the switching contact. This enables the operating member to be accurately restored to the initial state, and at the same time prevents malfunctioning conduction. In addition, according to the present invention, since the spring guide portion for suppressing the movement of the coil spring is provided on the operation member, the coil spring can be guided and the coil spring can be prevented from buckling. In this way, the operating member can be accurately restored to the initial state. [Brief description of the drawings] FIG. 1 is a perspective view of a push-button switch device in an embodiment of the present invention. (15) 200423173 FIG. I 2 stomach; exploded view of push-button switch device in an # embodiment; FIG. 3 is the present invention S-square resistive force; Φ & button: ϋ g ® right state diagram. Fig. 4 is a side cross-sectional view of the push button switch device in a state where the operating member is pressed into contact with the flat plate portion and the clamping contact portion.

Fig. 5 is a side sectional view of the push button switch device in a state where the operation member is pushed to the innermost side. FIG. 6 is a diagram of a push button switch device in another embodiment. FIG. 7 is a diagram of a push button switch device in another embodiment. FIG. 18 is a diagram of a push button switch device in another embodiment.

Comparison table of main components 10 Frame 11 Receiving section 12 Surrounding wall 13 Guide wall 20 Common contact 2 1 Main body 22 Common terminal 23 Connection terminal 3 0 Switching contact 3 1 Main body 32 Holding contact section -16- (14) 200423173 3 3 Connection terminal 40 Movable contact 4 1 Main body 4 3 Lateral joint 44 Flat part 5 0 Operating member 5 1 External operating part

5 2 Movable contact mounting part 53 Spring guide part 60 Coil spring 12a Small opening 12b Large opening

3 2a Convex P 32b Toggle spring piece 52a Terminal joint

52b Lateral joint 42 Movable terminal 70 Cover member -17-

Claims (1)

(1) (1) 200423173 Patent application scope 1 · A push button switch device including a housing with a storage portion, and a common contact and a switching contact provided in the storage portion, and maintaining and switching with the switching The contact contacts an operating member of the movable contact that can be separated freely, and a coil spring that can return the operating member to the initial state; it is characterized in that one end of the coil spring is constantly in contact with the common contact while the other end The movable contact point held by the operating member is often contacted, and the common contact point and the movable contact point are constantly conducted by the coil spring. 2. The push button switch device according to item 1 of the scope of patent application, wherein: the movable contact has a flat plate portion, and at the same time, the switching contact has a pair of clamping contact portions that are formed in a clip shape and face each other; The operating member holding the movable contact is pushed into the housing portion of the housing, and the flat plate portion is inserted into the pair of opposing clamping contact portions facing each other to contact each other. 3. The push button switch device described in item 1 of the scope of patent application, wherein: the movable contact has a flat plate portion, and at the same time, the switching contact has a pair of clamping contact portions formed in a clip shape and facing each other; The operation member holding the movable contact is pushed into the storage portion of the frame body, and the pair of opposing clamping contact portions are clamped to both surfaces of the flat plate portion and come into contact with each other. 4. The push button switch device described in item 1 of the scope of patent application, -18- (2) (2) 200423173 where = is provided between the common contact and the switching contact provided in the housing portion of the above-mentioned housing. A guide wall that suppresses the movement of the coil spring. 5. The push button switch device according to item 1 of the scope of patent application, wherein: the operating member is provided with a spring guide portion that suppresses movement of the coil spring. -19_