CN1371113A - Current overload protection device for push switch - Google Patents

Abstract

A current overload protector for push-type switch is composed of a switch body with slide slots at the position where the free end of conducting strip bounces, at least two connecting lugs and a push-pull rod pivoted to the lampshade, a transverse rod under said push-pull rod, and an elastic part for applying an elastic force to said push-pull rod. Thus, the push-pull rod can change the path and position in the sliding groove, the conducting strips can be controlled to be ON/OFF by the action force in different directions, the free ends of the conducting strips can be kept independent, the conducting strips can be tripped OFF when overload occurs, and the electricity utilization safety can be ensured.

Description

Current overload protection device for push switch

The invention relates to a protection device for a push-type switch in an electric switch in the field of basic electrical components, in particular to a push-pull rod for controlling the switching of conductive sheets, which is a chute shaped like an "8" on the inner edge of the switch body Sliding and positioning at the predetermined position, in addition to the general ON/OFF function, and then can completely trip the conductive sheet to break the circuit when the current is overloaded, so as to ensure the safety of electricity. The current overload protection device of the push switch.

There are many kinds of switches. Commonly used switches in the prior art include: rocker switch (SEE-SAW SWITCH), push switch, jump switch, micro switch...etc., their structures are different, and their uses And consumer preferences are also different, wherein the inventor has many patent approval cases concerning the technical solution of the rocker switch, so I won't repeat them here. The present invention is mainly aimed at the improvement of the two-stage push switch. Please refer to Fig. 1 to Fig. 4. It is a commonly used two-stage push switch. ) above the two-stage pressing rod (2) to drive the push rod (21) to move, and then control the conductive sheet (3) to realize the passage (ON) or disconnection (OFF), and the inner surface of the pressing rod (2) is provided with a Shaped like a chute (22), and the chute (22) is provided with multiple high and low level difference surfaces (221) at predetermined positions, and a shape (23), the upper end of which is pivotally arranged on the casing (1) and the lower end is located in the chute (22). When the pressing rod (2) is pressed downward, the upper end of the chute (22) is stuck on the bottom edge of the molded piece (23) and positioned. At this time, As shown in Figure 1 and Figure 2, it is in the ON state, but when the current of the conductive sheet (3) is overloaded, because the pressing rod (2) has been positioned by the shaped piece (23), it does not have the function of automatic tripping Function, that is, if you want to switch to the open circuit (OFF) state shown in Figure 3 and Figure 4, you must switch by hand operation, so, in use, there is a defect that you cannot jump off when the useful power is overloaded.

This shows that above-mentioned existing push type switch still has defective, and Cheng waits to be further improved. Therefore, how to make the push-type switch not only have the switching function of ON/OFF, but also have the function of automatically tripping to open circuit (OFF) when overloaded, is really a subject of concern to the industry.

In view of the defects of the above-mentioned existing push-type switch, the inventor actively researched and innovated based on rich practical experience and professional knowledge. After continuous research, design, and repeated trial and improvement, he finally created a this invention.

The main purpose of the present invention is to overcome the defects of the existing push-type switch, and provide a current overload protection device of a push-type switch with a new structure, so that the conductive sheet can show a collapsed state when the power supply is overloaded, making it It can completely reverse the deformation and jump off, and immediately show the OFF state, which can achieve the effect of absolute safety.

Another object of the present invention is to provide a current overload protection device for a push-type switch, so that it can still maintain the function of switching on/off (ON/OFF) of a general switch in a normal state.

The purpose of the present invention is achieved by the following technical solutions. According to the present invention, a current overload protection device for a push-type switch includes a switch body, at least two lugs and a push-pull rod, wherein: the switch body is generally a hollow square box, and a push-button is installed above it. The lampshade is provided with an elastic element at the bottom of the pressing lampshade; the at least two wiring pieces have a contact point fixed on the first wiring piece, and a conductive piece is connected to the top of the second wiring piece, and the bottom of the conductive piece is opposite to The contact point on the first lug is fixed with another contact point; the push-pull rod is pivotally connected in the pressing lampshade, and its lower end is a toggle part that can push and pull the free end of the aforementioned conductive sheet, so as to form a push-type switch structure type; it is characterized in that: the switch body has a chute on the rear inner wall at the position where the free end of the conductive sheet bounces; the shape of the chute is composed of a plurality of slide rails; The higher first positioning position and the lower second positioning position, and the joints or intersections of each slide rail are provided with step-shaped drop surfaces in sequence along the sliding direction; the push-pull rod is provided with a horizontal bar below it , the end of the cross bar is arranged in the aforementioned chute, and an elastic member is provided to form an elastic force structure that applies a rearward chute to the push-pull rod; thereby, the push-pull rod can change the path in the chute And positioning, and can control the conductive sheet to be ON/OFF with the action force in different directions, and keep the free end of the conductive sheet independent, which can jump off when overloaded, so as to ensure the safety of electricity use.

The purpose of the present invention can also be further achieved through the following technical measures.

The aforementioned current overload protection device for the push-type switch, wherein the push-pull rod is extended below the crossbar with a sloped rod with a push-up slope, and between the first positioning position and the second positioning position of the chute, an additional Another slide rail, and the connection between the slide rail and the second positioning point is a higher drop surface, and the connection point with the first positioning point is also provided with a drop surface; thereby, when the conductive sheet is overloaded and reversed When bouncing and deforming, the toggle part at the front end will push against the sloped rod of the push-pull rod when it is bouncing downwards to make it move outwards, and then slide away from the second positioning position and directly slide to the first positioning position to make the overload jump off Press the lampshade to return to the original OFF position.

In the aforementioned current overload protection device for push-pull switches, one end of the elastic member arranged on the outer side of the push-pull rod is hooked on the convex body outside the push-pull rod, and the other end is hooked on the lug of the push-pull lampshade. .

Compared with the prior art, the present invention has obvious advantages and positive effects. From the above technical solutions, it can be seen that the current overload protection device of the push switch of the present invention, the switch body is provided with a chute at the position where the free end of the conductive sheet bounces, and the shape of the chute is composed of a plurality of sliding rails intersecting curved arcs. The structural form, and a push-pull rod pivotally connected to the pressure lampshade, a cross bar is arranged below it, and the end of the cross bar is arranged in the aforementioned chute; thereby, the push-pull rod can be changed in the chute The path and positioning, and can control the conductive sheet to be ON/OFF with the action force in different directions, and keep the free end of the conductive sheet independent, and can show a collapsed state when the power supply is overloaded, and can completely reverse deformation and jump off, Immediately present an open circuit (OFF) state, which can achieve absolute safety and ensure the safety of electricity use. In addition, the current overload protection device of the push-type switch of the present invention can still retain the function of switching on/off (ON/OFF) of a general switch in a normal state, making it more suitable for practical use.

To sum up, the push-pull rod used to control the switching of the conductive sheet in the present invention slides and locates the predetermined position in the 8-shaped chute on the inner edge of the switch body, so that it not only has the general ON/OFF function , and can make the conductive sheet completely jump into the OFF state when the current is overloaded, so as to ensure the safety of electricity use. Compared with the conventional two-stage push switch, it not only has a simpler structure, but also has improved Safety efficacy. It has greatly improved both in structure and function, and has made great progress in technology, and has produced useful and practical effects, and indeed has enhanced efficacy, so it is more suitable for practical use. It is truly a novelty , Progressive and practical new design.

The specific structure of the present invention is given in detail by the following examples and accompanying drawings.

Fig. 1 is a structural schematic diagram 1 of a conventional two-stage push switch.

Fig. 2 is a structural schematic diagram II of a conventional two-stage push switch.

Fig. 3 is a structural schematic diagram 3 of a conventional two-stage push switch.

Fig. 4 is a structural schematic diagram 4 of a conventional two-stage push switch.

Fig. 5 is an external perspective view of a possible embodiment of the present invention.

Fig. 6 is an exploded perspective view of a partial structure of a possible embodiment of the present invention.

Fig. 7 is a partial structural cross-sectional view of a possible embodiment of the present invention.

Fig. 8 is a side sectional view showing an OFF state of a possible embodiment of the present invention.

FIG. 9 is a side cross-sectional view showing a conduction (ON) state of a possible embodiment of the present invention.

FIG. 10 is a perspective view showing the appearance of the conductive sheet when the contacts are at the starting position of a possible embodiment of the present invention.

FIG. 11 is a perspective view showing the appearance of the conductive sheet when the contacts are at the initial position according to a possible embodiment of the present invention.

Fig. 12 is an enlarged schematic view of part I in Fig. 8 when the push-pull rod is at position A of the chute.

Fig. 13 is a structural diagram showing that the push-pull rod in Fig. 12 is displaced from the position A of the chute to the lowest point A', and then slides upward in reverse.

Fig. 14 is a schematic diagram showing that the push-pull rod slides down to the position B' in the position B of the chute, and then reverses upwards to the position A.

Fig. 15 is a schematic perspective view of part II of the chute in Fig. 12 .

FIG. 16 is a schematic side view of the structure in FIG. 12 .

Fig. 17 is an exploded perspective view of a push-pull rod and its peripheral elements in another possible embodiment of the present invention.

Fig. 18 is a partial structural perspective view of another feasible embodiment of the present invention.

Fig. 19 is a structural schematic diagram of a chute in another feasible embodiment of the present invention.

Fig. 20 is a partially enlarged perspective view of part III in Fig. 19 .

(4) Switch body (5) Conductive sheet (65) Inclined rod

(41) Pressing lampshade (51) Contact (7) Chute

(411) Protrusion (52) Toggle part (7′) Chute

(412) Elastic element (53) Contact shrapnel (71) Slide rail

(413) Lug (6) Push-pull rod (72) Slide rail

(42) Ditch (61) Shaft (73) Slide rail

(43) Lug (62) Cross bar (74) Slide rail

(431)Contact (63)Convex body (75)Slide rail

(44) Lug (64) Elastic piece

The specific structure, features and functions of the current overload protection device for push switches according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

First, please refer to Fig. 5, Fig. 6, Fig. 7, and Fig. 8, the push-type switch disclosed by the current overload protection device of the push-type switch of the present invention includes:

A switch body (4), which is generally a hollow box body, and a pressing lampshade (41) is installed on the top, and both sides of the pressing lampshade (41) are provided with projections (411), which can be placed on the switch body (4) sliding up and down in the longitudinal groove (42), which is at least provided with an elastic element (412) at the bottom of the pressing lampshade (41);

At least two wiring pieces (43), (44), a contact point (431) is fixed above the first wiring piece (43), and a conductive piece (5) is connected to the top of the second wiring piece (44), and conducts electricity. The bottom of the sheet (5) is also fixedly provided with another contact point (51) at the position relative to the contact point (431) on the first lug (43);

A push-pull rod (6), its upper end (61) is pivotally connected to a lug (413) located on the inner edge of the pressing lampshade (41), and its lower end can push and pull the free end of the aforementioned conductive sheet (5), In order to form a push switch structure type;

in;

The switch body (4) has corresponding slide grooves (7) and (7') on the rear inner wall and the front inner wall at the position where the free end of the conductive sheet (5) bounces, please refer to Figure 12 again The shape of the chute (7), (7') is from the highest first positioning point (A) to the lowest first conversion point (A') in an inner arc shape, forming the first slide rail (71) , and then bend upwards to the second positioning point (B) to form the second slide rail (72), the second positioning point (B) is lower than the first positioning point (A), and is located in its inner position, and From the second positioning point (B) crosses the second slide rail (72) in a curved arc and reaches the second transition point (B') to form the third slide rail (73), and then from the second transition point (B') Return upwards to the first location (A) to form the fourth slide rail (74), making it form a 8-shaped chute structure, and the chute (7) on the rear inner wall, each slide At the junction or intersection of the rails, step-like drop surfaces (711), (721), (722), (731), (732), (741) are provided in sequence along the sliding direction; as for the front inner wall Auxiliary chute (7 '), the shape of it and the chute (7) of rear side inner wall is exactly the same, but it is only the positioning usefulness of the other end of the balance guiding cross bar (62), so it is not necessary to arrange each drop surface.

The conductive sheet (5) is provided with a toggle portion (52) at its front end, which can be configured as a flange body; and the push-pull rod (6) is provided with an inverted T-shaped cross bar (62) below it. ), the two ends of the cross bar (62) are arranged in the aforementioned chute (7), (7 '), and a spring member (64) is provided, one end of which is hooked on the outside of the push-pull rod (6) side of the convex body (63), while the other end is hooked on the lug (413) of the pressing lampshade (41) or other appropriate positions, and only the push-pull rod (6) is placed in the rear chute (7) The elastic force (as shown in Figure 7).

Please refer to Fig. 10 and shown in Fig. 11 again, the conductive sheet (5) used in the present invention is the structure (for example: No. 86218874) disclosed in the inventor's previous patents, which is made of double metal and a contact elastic piece (53) is provided in the center. The tail end of the contact elastic piece (53) is for the aforementioned contact (51) to be fixed, and the entire conductive sheet (5) is a structure assembled by condensation In this way, the free end is wider and the positioning end is narrower, so that it naturally forms a dish-shaped curved arc, so that it can push or pull the free end at room temperature without additional elastic elements ( 52), has the function of two-way bouncing, and can also automatically deform and bounce when the current is overloaded, that is, jump from the state in Fig. 10 to the state in Fig. 11, so as to achieve the purpose of automatic circuit breaking. However, this structure is not the subject of the patent of the present invention, and the present invention only uses the structure disclosed by the applicant in this application, so it will not be repeated here.

The technical features disclosed above are combined to form the current overload protection device of the push switch of the present invention. The effects of the present invention are described below.

Please refer to Fig. 8 and Fig. 12 at first, when the front end of the conductive piece (5) is downward and the contact shrapnel (53) rises, the contact point (51) at the tail end is separated from the first lug (43) The upper contact (431) presents an open circuit (OFF) type; at this time, the pressing lampshade (41) is at the highest position by the upward elastic force of the spring (412), and the push-pull rod (6) is raised to make the bottom of the The two ends of the crossbar (62) are located at the first position (A) of the chute (7) and the chute (7'), which means that the switch presents an open circuit but no energization state. And if will open circuit, then lightly press and press lampshade (41), make its downward displacement, now push-pull bar (6) linkage moves down, but because the cross bar (62) (62) of push-pull bar (6) bottom edge ( As shown in Figure 6), the two ends are in the slide grooves (7 '), (7) of the front and rear side inner walls (as shown in Figure 7), so then follow the direction of the first slide rail (71) And move down, when pressing the lampshade (41) to the bottom, the cross bar (62) moves to the first conversion position (A'), release the pressing lampshade (41) at this moment, then borrow the recovery of the elastic element (412) The elastic force makes the pressing lampshade (41) rise quickly upwards, and the push-pull rod (6) is upwardly connected, and the action situation shown in Figure 13 is shown. When the push-pull rod (6) rises, it straddles the front and rear chute (7 '), the cross bar (62) in (7) then pulls the front end toggle part (52) of the conductive sheet (5), so that the conductive sheet (5) bounces upwards and deforms, so that the front end of the conductive sheet (5) Rising, just like the state shown in Figure 10, then form the state shown in Figure 9, the tail end of the contact spring (53) is downward and makes the contact point (51) contact the first lug (43) to be conduction (ON) state.

Please refer to shown in Figure 13 again, when the push-pull rod (6) drives the conductive sheet (5) to bounce and deform upwards, the cross bar (62) on its bottom edge moves upwards along the direction of the second slide rail (72) And arrive at the second location (B); now it is the state shown in Figure 14, the push-pull rod (6) is changed position and above the conductive sheet (5), rather than below it, this point is very important , because the conductive sheet (5) is in the conduction (ON) state, there is no obstacle below it, when the conductive sheet (5) is overloaded with current, with the help of the structural characteristics of the double metal sheet condensation assembly, the power supply overload It will bounce and deform in the reverse direction, showing a collapsed state, and directly bounce from the upper deformation to the lower OFF position, which can ensure the safety of electricity use.

Furthermore, please refer to shown in Figure 14, if the power supply is not overloaded, the conductive sheet (5) is in the ON position, but when switching to the OFF position, then press down the lampshade (41) to make the bottom of the push-pull rod (6) The horizontal bar (62) on the edge moves downward along the third slide rail (73), and pushes the conductive sheet (5) downward, because the conductive sheet (5) will bounce and deform when it is pushed to the midline position, and jump to OFF position, at this time, the cross bar (62) slides through the second slide rail (72) and falls to the second conversion position (B'), at this time, the pressing lampshade (41) is pushed upward by the elastic element (412) Pick up, so the push-pull rod (6) will be brought back to the first location (A), and now it will return to the original OFF state.

As for, the push-pull rod (6) of the present invention can follow the first slide rail (71) → the second slide rail (72) → the third slide rail (73) → the fourth slide rail in the chute (7) The path of (74) moves and slides, mainly depends on two elements: at first each slide rail of the chute (7) of this rear side inner wall connects or intersects, then as shown in Figure 12 and Figure 15, Figure 16, Along its sliding direction, step-like drop surfaces (711), (721), (722), (733), (732), (741) are arranged in sequence; The provided elastic member (64) (as shown in Figure 7) makes the cross bar (62) maintain an elastic push force toward the rear side chute (7), and utilizes these two features to enable the push-pull rod (6) to Arrive at the first positioning point (A) or the second positioning point (B) according to the predetermined sliding path, and the conductive sheet (5) can be flashed through the chute (7) shaped like an 8-shaped curved arc. , so that when the power supply is overloaded, the conductive sheet (5) can still present an unimpeded collapse-like bouncing deformation to ensure the safety of electricity use; The basic ON/OFF switching function of the general push-type switch is retained; that is, when the conductive sheet (5) of the present invention jumps to the OFF position due to overload, the push-pull rod (6) can still be driven by pressing the lampshade (41), As shown in Figure 14, from the second location (B) → the second transition (B') → the first location (A), as shown in Figure 12 again, from the first slide rail (71) through the second Slide rail (72) starts conducting plate (5) and becomes ON state.

The embodiments disclosed above have enabled the push-type switch of the present invention to have an ON/OFF switching function, and at the same time have the function of completely tripping from overload.

Further, another feasible embodiment of the present invention is that when the conductive sheet (5) jumps off due to overload, the push-pull rod (6) can directly return from the second positioning position (B) to the first positioning position (A), and No need to go through the third slide rail (73), the fourth slide rail (74). In order to realize this ideal, please refer to Fig. 17 to Fig. 20, its main features are:

An inclined-plane rod (65) with a push-out slope extends below the cross bar (62) of the push-pull rod (6), and at the first location (A) and second location (B) of the chute (7) In between, a fifth slide rail (75) is added, and the junction of the fifth slide rail (75) and the second location (B) is as shown in Figure 20, which is a higher drop surface (751) , and the joint with the first location (A) is also provided with a drop surface (752). Thereby, when the conductive sheet (5) is overloaded and reversely bounces and deforms, the toggle portion (52) at its front end will push against the inclined-plane rod (65) of the push-pull rod (6) when it bounces and displaces downwards, so that It displaces outwards, so it straddles the drop surface (751) and slides directly from the second positioning position (B) to the first positioning position (A); this structural design will enable the press lampshade (41) to escape from the overload state Return to the original OFF position, which is more progressive than the first embodiment.

Therefore, the technical means disclosed in the above embodiments of the present invention can completely trip the conductive sheet into the OFF state when the current is overloaded; compared with the conventional two-stage push switch, it not only has a simpler structure, but also has improved Safety efficacy.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to within the scope of the technical solutions of the present invention.

Claims (3)

1, a kind of current overload protection protection unit of push switch, it comprises a Switch main body, at least two lug plates and a pull bar, wherein:

This Switch main body generally is a hollow square box, and the top is installed and is provided with a push-press lamp cover, and is provided with flexible member in the bottom of this push-press lamp cover;

This at least two lug plate be installed with a contact on its first lug plate, and the top of second lug plate is connected with a conducting strip, and the below of this conducting strip is installed with another contact with respect to the contact on first lug plate;

This pull bar is articulated in the push-press lamp cover, but its bottom then is the free-ended clicking section of the aforementioned conducting strip of push-and-pull, constitutes a press-switching structure kenel;

It is characterized in that:

This Switch main body, its rear side inwall is provided with chute in the position of conducting strip free end spring, and the shape of this chute is made of plural slide rail; And formed place, higher first location and lower place, second location at the slide rail joining place, and each slide rail joining place or infall, stair-stepping drop face be provided with in regular turn along its glide direction;

This pull bar, its below is provided with a cross bar, and the end of this cross bar is to be arranged in the aforementioned chute, and is provided with an elastic component and forms pull bar is bestowed an elastic acting force structure of breakking away groove backward; By this, pull bar is able in chute inner conversion path and location, and can becomes ON/OFF, and make the free end of conducting strip keep independent shape with the action force of different directions control conducting strip, can be when overload escape, to guarantee Electrical Safety.

2, the current overload protection protection unit of push switch according to claim 1, the cross bar below that it is characterized in that wherein said pull bar is extended and is provided with an inclined-plane bar with ejection inclined-plane, and between place, chute first location and place, second location, have additional another slide rail, and the joining place at this slide rail and second location place is the drop face that is higher, and also is provided with the drop face with the joining place at place, first location; By this, when conducting strip overload and oppositely during bouncing distortion, the clicking section of its front end is when spring displacement downwards, can push up the inclined-plane bar of the pull bar of pulling, make it to outer displacement, directly slide to place, first location and make the push-press lamp cover of overload trip state be returned to the position of original OFF and break away from second location place.

3, the current overload protection protection unit of push switch according to claim 1 is characterized in that the wherein said elastic component of being located at the pull bar outer side edges is an end hook on the convex body in the pull bar outside, the other end then hook at the lug of push-press lamp cover.

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